Installation, Operation, and
Maintenance
Blower Coil Air Handler
Air Terminal Devices - 400 to 3000 cfm
Models BCHC and BCVC
“AO” and later design sequence
BCXC-SVX01B-EN
April 2008
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Warnings, Cautions and Notices
ƽ WARNING
Hazard of Explosion and Deadly Gases!
Never solder, braze or weld on refrigerant lines or any unit components that are above
atmospheric pressure or where refrigerant may be present. Always remove refrigerant by
following the guidelines established by the EPA Federal Clean Air Act or other state or local
codes as appropriate. After refrigerant removal, use dry nitrogen to bring system back to
atmospheric pressure before opening system for repairs. Mixtures of refrigerants and air under
pressure may become combustible in the presence of an ignition source leading to an explosion.
Excessive heat from soldering, brazing or welding with refrigerant vapors present can form
highly toxic gases and extremely corrosive acids. Failure to follow all proper safe refrigerant
handling practices could result in death or serious injury.
BCXC-SVX01B-EN
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Introduction
About This Manual
Use this manual for commercial blower coil models BCHC and BCVC. This is the second version
of this manual; this manual supercedes BCXB-SVX01A-EN. It provides specific installation,
operation, and maintenance instructions for “AO” and later design sequences.
For previous design sequence information, contact your local Trane representative.
Trademarks
Trane, theTranelogo, Frostat, IntegratedComfort,Rover, Tracer, andTracerSummitaretrademarks
of Trane in the United States and other countries. All trademarks referenced in this document are
the trademarks of their respective owners.
4
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Table of Contents
Model Number Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Pre-Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Receiving and Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Rigging and Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Pre-Installation Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Dimensions and Weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Horizontal Blower Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Vertical Blower Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Angle Filter and Mixing Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Electric Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Steam Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Coil Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Installation Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Communication Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Installation Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Unit Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Supply Power Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Electrical Grounding Restrictions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Installation Mechanical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Installing the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Mixing Box Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Duct Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Installation Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Water Coil Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Refrigerant Coil Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
BCXC-SVX01B-EN
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Steam Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Controls Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Control Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Tracer Controllers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Rover Service Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Pre-Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Cooling Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Fan Mode Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Electric Heat Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Binary Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Analog Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Zone Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Maintenance Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
LED Activity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Resetting Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Common Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
6
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Model Number Description
Following isacompletedescriptionof
the blower coil model number. Each
digit in the model number has a
corresponding code that identifies
specific unit options.
Digit 14 — Unit Coil #1*
Digit 16 — Motor Horsepower
Note: Allcoilsarehydronicunlessstated
0
1
2
3
=
=
=
=
none
4
5
6
7
=
=
=
=
1 hp
otherwise.
1/3 hp
1/2 hp
3/4 hp
1-1/2 hp
2 hp
0
A
L
=
=
=
none
1-row preheat
2-row hydronic high-capacity
preheat
4-row hydronic
6-row hydronic
4-row hydronic, autochangeover
6-row hydronic, autochangeover
4-row hydronic high-capacity
6-row hydronic high-capacity
4-row hydronic high-capacity,
autochangeover
3 hp
Digits 1, 2, 3, 4 — Unit Model
BCHC= horizontal blower coil
BCVC= vertical blower coil
Digit 17 — Motor Drives
F
G
J
K
M
N
R
=
=
=
=
=
=
=
0
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
none
A
B
C
D
E
F
390–552 rpm / 60 Hz
478–678 rpm / 60 Hz
540–765 rpm / 60 Hz
619–878 rpm / 60 Hz
727–1029 rpm / 60 Hz
879–1245 rpm / 60 Hz
1000–1417 rpm / 60 Hz
1200–1700 rpm / 60 Hz
1313–1859 rpm / 60 Hz
1615–2288 rpm / 60 Hz
678–877 rpm / 60 Hz
765–990 rpm / 60 Hz
878–1136 rpm / 60 Hz
1029–1332 rpm / 60 Hz
1245–1611 rpm / 60 Hz
1174–1519 rpm / 50 Hz
Digits 5, 6, 7 — Unit Size
012
018
024
036
054
072
090
Digit 8 — Unit Voltage
T
1
2
3
4
5
6
=
=
=
=
=
=
=
6-row hydronic high-capacity,
autochangeover
3-row DX, 3/16” distributor
(0.032)
4-row DX, 3/16” distributor
(0.032)
6-row DX, 3/16” distributor
(0.032)
3-row DX, 3/16” distributor
(0.049)
4-row DX, 3/16” distributor
(0.049)
6-row DX, 3/16” distributor
(0.049)
G
H
J
K
L
M
N
P
R
T
A
B
C
D
E
=
=
=
=
=
=
=
115/60/1
208/60/1
230/60/1
277/60/1
208/60/3
230/60/3
460/60/3
H
J
=
=
=
=
=
=
=
575/60/3
220/50/1
240/50/1
380/50/3
415/50/3
190/50/3
K
L
M
N
P
F
G
two-speed,
115/60/1
Digit 18 — Electric Heat Stages
0
=
no motor, ctrls, elec ht.
0
1
2
=
=
=
none
1-stage
2-stage
Digit 9 —Insulation Type
Digit 15 — Unit Coil #2*
1
2
=
=
1” matte-faced
1” foil-faced
Digits 19, 20, 21 — Electric Heat
Note: Allcoilsarehydronicunlessstated
otherwise.
Digits 10, 11 — Design Sequence
A0
000 = none
100 = 10.0 kW
0
A
L
=
=
=
none
010 = 1.0 kW
015 = 1.5 kW
020 = 2.0 kW
025 = 2.5 kW
030 = 3.0 kW
035 = 3.5 kW
040 = 4.0 kW
045 = 4.5 kW
050 = 5.0 kW
055 = 5.5 kW
060 = 6.0 kW
065 = 6.5 kW
070 = 7.0 kW
075 = 7.5 kW
080 = 8.0 kW
090 = 9.0 kW
110
120
11.0 kW
12.0 kW
=
=
1-row reheat
2-row hydronic high-capacity
reheat
4-row hydronic
6-row hydronic
2-row hydronic, autochangeover
4-row hydronic, autochangeover
6-row hydronic, autochangeover
4-row hydronic high-capacity
6-row hydronic high-capacity
2-row hydronic high-capacity,
autochangeover
Digit 12 — Motor, Drive, and
Control Box Location
130 = 13.0 kW
140 = 14.0 kW
150 = 15.0 kW
160 = 16.0 kW
170 = 17.0 kW
180 = 18.0 kW
190 = 19.0 kW
200 = 20.0 kW
210 = 21.0 kW
220 = 22.0 kW
240 = 24.0 kW
260 = 26.0 kW
280 = 28.0 kW
300 = 30.0 kW
F
=
=
=
=
=
=
=
=
A
=
same side as coil connections,
horizontal or counterswirl only
opposite side from coil
connections, horizontal or
counterswirl only
G
H
J
B
=
K
M
N
P
C
D
=
=
same side as coil connections,
pre-swirl only
opposite side from coil
connections, pre-swirl only
right-hand access
R
T
1
2
3
4
5
6
=
=
=
=
=
=
=
=
4-row hydronic high-capacity,
autochangeover
6-row hydronic high-capacity,
autochangeover
3-row DX, 3/16” distributor
(0.032)
4-row DX, 3/16” distributor
(0.032)
6-row DX, 3/16” distributor
(0.032)
3-row DX, 3/16” distributor
(0.049)
4-row DX, 3/16” distributor
(0.049)
6-row DX, 3/16” distributor
(0.049)
R
L
=
=
left-hand access
Digit 13 — Drain Pan Type, Coil
& Drain Connection Side
0
1
=
=
none
Digit 22 — Electric Heat Controls
polymer drain pan & right-hand
connections
0
A
B
=
=
=
none
2
3
4
=
=
=
polymer drain pan & left-hand
connections
stainless steel drain pan & right-
hand connections
stainless steel drain pan & left-
hand connections
24 volt magnetic contactors
24 volt mercury contactors
Digit 23 — Electric Heat Options
0
A
B
=
=
=
none
electric heat with heater fuse
electric heat interlocking non-
fused disconnect
A & B
C
=
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Model Number Description
Digit 29 — Unit Coil #1 Piping
Package
Digit 34 — Mixing Box Damper
Actuator
Digit 24 — Filters
0
A
B
=
=
=
none
1” throwaway
2” pleated throwaway
0
1
2
=
=
=
none
Note: The back damper is the control
damper when actuators are
ordered. The back damper is n.c.
(normallyclosed)orn.o.(normally
open) as selected.
basic piping package
deluxe piping package
Digit 25 — Accessory Section
Digit 30 — Unit Coil #2 Control
Valve
0
=
=
=
=
=
=
=
=
=
=
=
none
A
B
C
D
E
F
G
H
J
mixing box only
angle filter box
angle filter/mixing box
top access filter box
bottom access filter
A & D
A & E
steam coil
A & H
B & H
0
1
2
3
4
5
6
7
=
=
=
=
=
=
=
=
none
0
=
=
=
=
=
=
=
=
=
=
none
2-position, n.o., ship loose
modulating, n.c.
A
B
C
D
E
F
2-way, 2-position, n.c.
2-way, 2-position, n.o.
3-way, 2-position, n.c.
3-way, 2-position, n.o.
2-way modulating
modulating, n.o.
modulating, ship loose
field-supplied 2-position, n.o.
field-supplied 2-position, n.c.
field-supplied modulating
L
=
=
=
=
=
C & H
D & H
E & H
A, D, & H
A, E, & H
M
N
P
3-way modulating
G
H
J
field-supplied valve, 2-pos., n.c.
field-supplied valve, 2-pos., n.o.
field-supplied modulating valve
Digit 35 — Factory Mounted
Control Options
K
R
Digit 31 — Unit Coil #2 Control
Valve Cv
0
=
=
=
=
=
=
none
fan status
condensate overflow
low limit
A & C
A & D
Digit 26 — Control Type
A
C
D
F
0
1
2
3
4
=
=
=
=
=
no controls (4 x 4 junction box)
control interface
Tracer™ ZN010
0
=
=
=
=
=
=
none
A
B
C
D
E
3.3 Cv, 1/2” valve & pipe
3.3 Cv, 1/2” valve & 3/4” pipe
3.8 Cv, 1/2” valve & 3/4” pipe
6.6 Cv, 1” valve & pipe
7.4 Cv, 1” modulating valve &
pipe
K
N
=
=
C & D
A, C, & D
Tracer ZN510
G
Tracer ZN520
Digit 27 — Unit Coil #1 Control
Valve
Digit 36 — Control Options 2
0
A
B
C
=
=
=
=
none
F
=
8.3 Cv, 1-1/4” modulating valve &
pipe
0
=
=
=
=
=
=
=
=
=
=
none
outside air sensor, field-mounted
discharge air sensor
A & B
A
B
C
D
E
F
2-way, 2-position, n.c.
2-way, 2-position, n.o.
3-way, 2-position, n.c.
3-way, 2-position, n.o.
2-way modulating
G
H
J
=
=
=
3.5 Cv, 1/2” valve & pipe
4.4 Cv, 1/2” valve & pipe
7.0 Cv, 3-way valve
OR 6.0 Cv, 2-way valve, 1” valve
& pipe
Digit 37 — Control Options 3
0
A
=
=
none
3-way modulating
dehumidification with
communicated value
dehumidification with local
humidity sensor
K
L
M
=
=
=
8.0 Cv, 1” valve & pipe
7.4 Cv, 1” 2-position valve & pipe
8.3 Cv, 1-1/4” 2-position valve &
pipe
G
H
J
field-supplied valve, 2-pos., n.c.
field-supplied valve, 2-pos., n.o.
field-supplied modulating valve
B
=
Digit 28 — Unit Coil #1 Control
Valve Cv
Digit 38 — Zone Sensors
0
1
Q
R
T
=
=
=
=
1.3 Cv, 1/2” valve, 3/4” pipe
1.8 Cv, 1/2” valve, 3/4” pipe
2.3 Cv, 1/2” valve, 3/4” pipe
2.7 Cv, 1/2” valve, 3/4” pipe
=
=
none
0
=
=
=
=
=
=
none
off/auto, setpoint knob, on/cancel,
COMM
U
A
B
C
D
E
3.3 Cv, 1/2” valve & pipe
3.3 Cv, 1/2” valve & 3/4” pipe
3.8 Cv, 1/2” valve & 3/4” pipe
6.6 Cv, 1” valve & pipe
7.4 Cv, 1” modulating valve &
pipe
2
3
4
=
=
=
off/auto/high/low, setpoint knob,
on/cancel, COMM
wall mtd. zone sensor (set point,
occ, COMM)
wall mtd. zone sensor (occ,
COMM)
wall mtd. zone temp sensor
digital zone sensor (O, A, H, L; SP;
OCC; COMM)
digital zone sensor (CPS; OCC;
COMM)
wireless zone sensor (setpoint
only)
Digit 32 — Unit Coil #2 Piping
Package
0
1
2
=
=
=
none
basic piping package
deluxe piping package
F
=
8.3 Cv, 1-1/4” modulating valve &
pipe
5
A
=
=
Digit 33 — Remote Heat Options
G
H
J
=
=
=
3.5 Cv, 1/2” valve & pipe
4.4 Cv, 1/2” valve & pipe
7.0 Cv, 3-way valve
OR 6.0 Cv, 2-way valve, 1” valve
& pipe
0
1
2
=
=
=
none
staged electric heat
2-position hot water, n.c.
B
C
=
=
K
L
M
=
=
=
8.0 Cv, 1” valve & pipe
7.4 Cv, 1” 2-position valve & pipe
8.3 Cv, 1-1/4” 2-position valve &
pipe
Digit 39 — Extra Belt
0
1
=
=
none
ship loose extra belt
Q
R
T
=
=
=
=
1.3 Cv, 1/2” valve, 3/4” pipe
1.8 Cv, 1/2” valve, 3/4” pipe
2.3 Cv, 1/2” valve, 3/4” pipe
2.7 Cv, 1/2” valve, 3/4” pipe
Digit 40 — Extra Filter
0
1
=
=
none
U
ship loose extra 1” throwaway
filter
2
=
ship loose extra 2” pleated
throwaway
8
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General Information
Blower Coil General Information
Blower coil units are draw-thru air handlers for cooling load conditions of 400–3000 cfm. Units are
available in either horizontal (model BCHC) or vertical (model BCVC) configurations. Horizontal
units are typically ceiling suspended via threaded rods. Knockouts are provided in all four corners
to pass the rods through the unit. Horizontal units can also be floor mounted. Vertical units are
typically floor mounted. They have a side inlet for easy duct connection, and do not require a field
fabricated inlet plenum. Vertical units ship in two pieces and can be set up in either a pre-swirl or
counter-swirl configuration.
Basic unit components consist of a water coil, condensate drain pan, filter, duct collars, one fan
The coil, drain pan, and motor/drive assembly can easily be field-converted from right hand to left
hand configurations or vice versa.
Figure 1. Blower coil air handler unit components (model BCHC, horizontal unit)
Main coil with copper
tubes and enhanced
aluminum fins in 2-, 4-,
or 6-row hydronic or 3-,
4-, or 6-row DX
Internal filter frame
accommodates 1- or
2-inch filters
Unit sizes 12, 18, 24, 36,
54, 72, and 90 MBh
Galvanized steel
Knockouts in all four
cabinet in 14-, 18-, 22-,
and 28-inch heights
corners for hanger rods
Angle filter option and/or
mixing box accommodates
2-inch filters
Forward curved fan
Internal 1- or
2-row auxiliary
coil in preheat
1/3 to 3 hp motor
with drive
selections from
390 to 1611 rpm
Control options
Main and auxiliary
drain connections on
same side of unit
include control
interface, Tracer™
ZN010, ZN510, or
ZN520
or reheat position
Two, four, or six-row main coils are available for either hydronic cooling or heating. Three, four, or
six-row direct expansion (DX) coils are also available for cooling. An optional one, two, four, or six-
row heating coil is available factory-installed in either the preheat or reheat position. Also, a one-
row preheat steam is available.
All units have an internal flat filter frame for one or two-inch filters. An optional angle filter box (two
inch only), mixing box, bottom/top filter access box, or combination angle filter mixing box is
available.
In addition, all units are available with either a basic or deluxe piping package option that includes
a variety of control valve sizes in two or three-way configurations. The basic package consists of
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General Information
a control valve and stop (ball) valves. The deluxe package consists of a control valve, a stop (ball)
valve, a circuit setter, and strainer.
Belt-drive motors range from 1/3 to 3 horsepower in a wide range of voltages. All motors have
internal thermal and current overloads, permanently sealed ball bearings, and a resilient cradle
mount to reduce noise and vibration transmission.
Variable pitch sheave drive kit options help make it possible to more accurately select design static
pressure. For additional flexibility, 115 volt single phase, two speed motors are optional.
Note: Sheaves are factory set in the middle of the range. Field adjustment of sheaves, motor, and
for drive information.
Units may have no controls (4 x 4 junction box) or any of four different control types:
1. control interface
2. Tracer™ ZN010
3. Tracer ZN510
4. Tracer ZN520
All control options are factory-installed and tested.
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Pre-Installation
Receiving and Handling
Blower coil units are packaged for easy handling and storage on the job site. Upon delivery, inspect
all components for possible shipping damage. See the “Receiving Checklist” section (below) for
detailed instructions. Trane recommends leaving units and accessories in their shipping packages/
skids for protection and handling ease until installation.
Shipping Package
Blower coil air handlers ship assembled on skids with protective coverings over the coil and
discharge openings.
Ship-Separate Accessories
Field-installed sensors ship separately inside the unit’s main control panel. Piping packages,
mixing boxes, ship separately packaged on the same skid as the unit.
Receiving Checklist
Complete the following checklist immediately after receiving unit shipment to detect possible
shipping damage.
ꢀ Inspectindividualcartonsbeforeaccepting. Checkforrattles, bentcartoncorners, orothervisible
indications of shipping damage.
ꢀ If a unit appears damaged, inspect it immediately before accepting the shipment. Manually
rotate the fan wheel to ensure it turns freely. Make specific notations concerning the damage on
the freight bill. Do not refuse delivery.
ꢀ Inspect the unit for concealed damage before it is stored and as soon as possible after delivery.
Report concealed damage to the freight line within the allotted time after delivery. Check with the
carrier for their allotted time to submit a claim.
ꢀ Do not move damaged material from the receiving location. It is the receiver’s responsibility to
provide reasonable evidence that concealed damage did not occur after delivery.
ꢀ Do not continue unpacking the shipment if it appears damaged. Retain all internal packing,
cartons, and crate. Take photos of damaged material if possible.
ꢀ Notify the carrier’s terminal of the damage immediately by phone and mail. Request an
immediate joint inspection of the damage by the carrier and consignee.
ꢀ Notify your Trane representative of the damage and arrange for repair. Have the carrier inspect
the damage before making any repairs to the unit.
ꢀ Compare the electrical data on the unit nameplate with the ordering and shipping information
to verify the correct unit is received.
Jobsite Storage Recommendations
This unit is intended for indoor use only. To protect the unit from damage due to the elements and
prevent it from possibly becoming a contaminant source for IAQ problems, store the unit indoors.
If indoor storage is not possible, the Trane Company makes the following provisions for outdoor
storage:
1. Place the unit(s) on a dry surface or raised off the ground to assure adequate air circulation
beneath unit and to assure that no portion of the unit contacts standing water at any time.
2. Cover the entire unit with a canvas tarp only. Do not use clear, black, or plastic tarps as they
may cause excessive moisture condensation and equipment damage.
Note: Wet interior unit insulation can become an amplification site for microbial growth (mold),
which may cause odors and health-related indoor air quality problems. If there is visible
evidence of microbial growth (mold) on the interior insulation, remove and replace the
insulation prior to operating the system.
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Pre-Installation
Installation Preparation
Before installing the unit, perform the following procedures to ensure proper unit operation.
1. Verify the floor or foundation is level. Shim or repair as necessary. To ensure proper unit
operation, install the unit level (zero tolerance) in both horizontal axes. Failure to level the unit
properly can result in condensate management problems, such as standing water inside the
unit. Standing water and wet surfaces inside units can result in microbial growth (mold) in the
drain pan that may cause unpleasant odors and serious health-related indoor air quality
problem.
2. Allow adequate service and code clearances as recommended in the “Service Access” section
(below). Position the unit and skid assembly in its final location. Test lift the unit to determine
exact unit balance and stability before hoisting it to the installation location.
Service Access
ƽ WARNING
Hazardous Voltage!
Disconnect all electric power, including remote disconnects before servicing. Follow proper
lockout/tagout procedures to ensure the power can not be inadvertently energized. Failure to
disconnect power before servicing could result in death or serious injury.
Table 1. Service requirements, in. (cm)
Unit size
Dimension A
20 (50.8)
12
18
24
36
54
72
90
25 (63.5)
25 (63.5)
37 (94.0)
37 (94.0)
45 (114.3)
45 (114.3)
12
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Pre-Installation
Figure 2. Top view of blower coil unit showing recommended service and code clearances
3
3
Rigging and Handling
Before preparing the unit for lifting, estimate the approximate center of gravity for lifting safety.
Because of placement of internal components, the unit weight may be unevenly distributed, with
p. 15. Also, you may reference the unit weight on the unit nameplate.
Before hoisting the unit into position, use a proper rigging method such as straps, slings, or
spreader bars for protection and safety. Always test-lift the unit to determine the exact unit balance
and stability before hoisting it to the installation location.
ƽ WARNING
Improper Unit Lift!
Test lift unit approximately 24 inches to verify proper center of gravity lift point. To avoid
dropping of unit, reposition lifting point if unit is not level. Failure to properly lift unit could
result in death or serious injury or possible equipment or property-only damage.
Unit Handling Procedure
1. Position rigging sling under wood skid using spreader bars to avoid unit damage.
2. Use a forklift with caution to prevent unit damage. The fork length must be at least 68 inches
long to safely fork the unit from front or back.
3. The unit center of gravity will fall within the center of gravity block at various locations
depending on unit options.
4. See unit nameplate for unit weight.
Unit Location Recommendations
When selecting and preparing the unit installation location, consider the following
recommendations.
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Pre-Installation
2. Allow sufficient space for the recommended clearances, access panel removal, and
3. The installer must provide threaded suspension rods for ceiling mounted units. All units must
be installed level.
4. Coil piping and condensate drain requirements must be considered.
Allow room for proper ductwork and electrical connections. Support all piping and ductwork
independently of unit to prevent excess noise and vibration.
Skid Removal
The unit ships on skids that provide forklift locations from the front or rear. The skid allows easy
maneuverability of the unit during storage and transportation. Remove the skids before placing the
unit in its permanent location.
Remove the skids using a forklift or jack. Lift one end of the unit off of the skids. Vibration isolators
for external isolation are field supplied.
Pre-Installation Checklist
Complete the following checklist before beginning unit installation.
ꢀ Verify the unit size and tagging with the unit nameplate.
ꢀ Make certain the floor or foundation is level, solid, and sufficient to support the unit and
positioning the unit if necessary.
ꢀ Allow minimum recommended clearances for routine maintenance and service. Refer to unit
submittals for dimensions.
ꢀ Allow one and one half fan diameters above the unit for the discharge ductwork.
14
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Dimensions and Weights
Horizontal Blower Coil
*NOTE: ON UNITS WITHOUT A
BOTTOM FILTER ACCESS SECTION
top view
M
M
M
PP
Q
1.5
J
J
front view
Table 2. Horizontal blower coil dimensions (in.) and weights (lb)
Basic
unit
weight
Unit
size
G
G
J
J
H
W
L
A
B
C
D
E
F
(RH) (LH) (RH) (LH)
K
M
P
Q
12 14.00 24.00 39.75 12.09 18.00 10.56 7.09 0.55 3.00 11.42 13.42 9.42 11.42 4.20
8.46
9.00
5.75
5.75
5.75
70.40
76.10
98.90
18 14.00 28.00 39.75 12.09 22.00 10.56 7.09 0.55 3.00 11.42 13.42 9.42 11.42 4.20 10.46 9.00
24 18.00 28.00 44.00 16.09 22.00 13.56 12.56 1.30 3.00 11.42 13.42 9.42 11.42 6.20 7.72 9.00
36 18.00 40.00 44.00 16.09 34.00 13.56 12.56 1.30 3.00 11.42 13.42 9.42 11.42 6.20 13.72 9.00
5.75 116.10
54 22.00 40.00 49.00 20.09 34.00 13.56 12.56 0.72 3.00 11.42 13.42 9.42 11.42 7.43 13.72 11.00 7.27 138.90
72 22.00 48.00 49.00 20.09 40.00 13.56 12.56 0.72 4.00 11.42 13.42 9.42 11.42 7.43 17.72 11.00 7.27 152.20
90 28.00 48.00 52.00 26.09 40.00 13.56 12.56 1.66 4.00 12.79 14.79 10.79 12.79 8.24 17.72 11.25 11.64 174.80
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Dimensions and Weights
Vertical Blower Coil
*NOTE; ON UNITSWITHOUT A
TOP FILTER ACCESS SECTION
vertical counter swirl
top view
configuration
vertical preswirl
configuration
M
M
6.00
P
Q
J
front view
Table 3. Vertical blower coil dimensions (in.) and weights (lb)
Basic
unit
weight
Unit
size
G
G
J
J
H
W
L
A
B
C
D
E
F
(RH) (LH) (RH) (LH)
K
M
N
P
Q
R
24 63.50 28.00 44.00 16.09 22.00 13.56 12.56 1.30 3.00 11.42 13.42 9.42 11.42 6.20 5.50 18.00 9.00 5.50 28.00 150.30
36 63.50 40.00 44.00 16.09 34.00 13.56 12.56 1.30 3.00 11.42 13.42 9.42 11.42 6.20 5.50 18.00 9.00 5.50 28.00 180.40
54 72.50 40.00 47.00 20.09 34.00 13.56 12.56 0.72 3.00 11.42 13.42 9.42 11.42 4.21 10.43 22.00 11.00 7.27 30.00 206.40
72 72.50 48.00 47.00 20.09 40.00 13.56 12.56 0.72 4.00 11.42 13.42 9.42 11.42 4.18 10.43 22.00 11.00 7.27 30.00 228.20
90 81.50 48.00 50.00 26.09 40.00 13.56 12.56 1.66 4.00 12.79 14.79 10.79 12.79 4.81 15.61 28.00 11.25 11.64 30.00 258.40
16
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Dimensions and Weights
Angle Filter and Mixing Box
combination angle filter
& mixing box
mixing box
angle filter box
Table 4. Angle filter and mixing box dimensions (in.) and weights (lb)
Unit size
H
L
W
A
B
Weight
36.0
12
16
24
36
54
72
90
14.12
14.12
18.12
18.12
22.12
22.00
27.90
22.00
22.00
19.50
24.50
23.50
23.50
27.56
24.11
28.11
28.11
40.11
40.11
48.00
48.00
7.06
7.06
7.06
7.06
12.81
12.81
12.85
15.56
19.56
19.56
31.56
31.56
32.56
31.56
41.0
43.0
56.0
72.0
72.5
84.1
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Dimensions and Weights
Bottom or Top Access Filter Box
7.17
.97
FILTER
AIR FLOW
FILTER
AIR FLOW
top view
FILTER ACCESS PANEL
NOTES;
right side view
1. DIMENSIONS ARE IN INCHES.
2. ROTATE 180° FOR TOP ACCESS.
3. SECTIONS SHIPS ATTACHED TO THE UNIT.
Table 5. Bottom or top access filter box dimensions (in.) and weights (lb)
Unit size
H
W
A
B
C
D
Weight
15
12
18
24
36
54
72
90
14.00
14.00
18.00
18.00
22.00
22.00
28.00
24.00
28.00
28.00
40.00
40.00
48.00
48.00
9.98
2.01
2.01
1.89
1.89
1.89
1.89
1.89
18.23
21.98
23.23
33.73
33.73
42.73
41.23
2.88
3.01
2.38
3.13
3.13
2.63
3.38
9.98
17
14.23
14.23
18.23
18.23
23.23
18
25
28
32
37
18
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Dimensions and Weights
Electric Heat
& 90
top view
D
front view
right side view
& 90
& 90 ARE HINGED
ELECTRIC HEAT MAY NEED FIELD-SUPPLIED
EXTERNALLY-WRAPPED INSULATION IF THE UNIT
IS INSTALLED IN AN UNCONDITIONED SPACE OR
IF SWEATING IS AN ISSUE.
Table 6. Electric heat dimensions (in.) and weights (lb)
Unit size
H
W
A
B
C
D
E
Weight
10.0
12
18
24
36
54
72
90
14.06
14.06
18.06
18.06
18.06
18.06
18.06
17.88
19.88
21.25
27.25
27.25
27.25
27.25
8.13
6.79
10.50
10.50
13.50
13.50
13.50
13.50
13.50
7.75
0.03
0.03
0.80
0.80
0.22
0.22
1.16
10.13
7.63
8.79
7.75
10.8
6.29
12.63
12.63
12.63
12.63
12.63
11.3
13.63
13.63
13.63
13.63
12.29
11.67
11.67
11.67
12.8
16.0
17.4
19.2
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Dimensions and Weights
Steam Coil
ACCESS PANEL
C
B
C
0.97
NOTES:
1. FILTER ACCESS & ACCESS PANEL LOCATED
ON BOTH SIDES.
2. WEIGHT INCLUDES CABINET WITH AVERAGE FILTER,
BUT DOES NOT INCLUDE CIOL WEIGHT.
SEE GENERAL DATA SECTION FOR COIL WEIGHTS.
AIRFLOW
H
A
0.97
W
21.00
FILTER ACCESS
Table 7. Steam coil box dimensions (in.) and weights (lb)
Coil Connections, NPT
Unit size
H
W
A
B
C
Weight
34
Supply
Return
12
18
24
36
54
72
90
14.00
14.00
18.00
18.00
22.00
22.00
28.00
24.00
28.00
28.00
40.00
40.00
48.00
48.00
12.06
12.06
16.06
16.06
20.06
20.06
26.06
18.04
22.04
22.04
34.04
34.04
42.04
40.04
2.98
2.98
2.98
2.98
2.98
2.98
3.98
1
1
3/4
3/4
1
37
40
1-1/2
1-1/2
2
48
1
50
1
56
2
1
63
2.5
1-1/4
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Dimensions and Weights
Coil Connections
Table 8. Hydronic coil connection sizes, OD (in.)
Standard capacity
High capacity
Unit size
1-row
5/8
4-row
6-row
2-row
5/8
4-row
7/8
6-row
7/8
12
18
24
36
54
72
90
-
-
5/8
-
-
5/8
7/8
7/8
5/8
-
-
7/8
1-1/8
1-1/8
1-1/8
1-1/8
1-1/8
1-1/8
1-1/8
1-1/8
1-1/8
1-1/8
7/8
-
-
7/8
1-1/8
1-1/8
1-1/8
1-3/8
1-3/8
1-5/8
1-3/8
1-3/8
1-5/8
1-1/8
1-1/8
1-1/8
Table 9. DX coil connection sizes, OD (in.)
3- & 4-row
6-row
Unit size
Suction
5/8
Liquid
5/8
Suction
5/8
Liquid
5/8
12
18
24
36
54
72
90
5/8
5/8
5/8
5/8
5/8
5/8
7/8
5/8
7/8
5/8
7/8
5/8
1-1/8
1-1/8
1-3/8
7/8
1-1/8
1-1/8
1-1/8
7/8
7/8
7/8
7/8
7/8
Table 10. Steam coil connection sizes, female connection, NPT (in.)
Unit size
Supply
Return
12
18
24
36
54
72
90
1
1
3/4
3/4
1
1-1/2
1-1/2
2
1
1
2
1
2-1/2
1-1/4
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Dimensions and Weights
Piping Packages
Basic Piping
Two-way, 1/2” and 1” valve basic piping package
B
A
B
A
Two-way, 1-1/4” valve basic piping package
A
B
AB
E
B
A
Three-way, 1/2” and 1” valve basic piping package
F
A
B
AB
A
E
B
22
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Dimensions and Weights
Deluxe Piping
Two-way, 1/2” and 1” valve deluxe piping package
D
B
A
C
Two-way 1-1/4” valve deluxe piping package
D
A
B
AB
E
C
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Dimensions and Weights
Three-way, 1/2” and 1” valve deluxe piping package
F
A
B
AB
E
C
D
Table 11. Piping package dimensions (in.)
Piping
Nominal
package
tube size Actual size
A
B
C
D
E
F
2-way
1/2
1
5/8
1-1/8
5/8
12.025
13.295
12.088
15.623
13.370
16.885
2.650
4.260
2.097
1.750
3.690
3.738
12.625
13.220
12.688
15.313
13.210
16.410
5.650
9.288
4.497
6.290
9.060
10.023
N/A
N/A
3.020
6.351
6.701
9.813
3.052
N/A
3-way
1/2
3/4
1
6.351
6.701
9.813
10.520
7/8
1-1/8
1-3/8
1-1/4
24
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Installation Controls
Installing Wall Mounted Controls
dimensions.
Position the controller on an inside wall three to five feet above the floor and at least 18 inches from
the nearest outside wall. Installing the controller at a lower height may give the advantage of
monitoring the temperature closer to the zone, but it also exposes the controller to airflow
obstructions. Ensure that air flows freely over the controller.
Before beginning installation, follow the wiring instructions below. Also, refer to the unit wiring
schematic for specific wiring details and point connections.
Wiring Instructions
Avoid mounting the controller in an area subject to the following conditions:
•
•
•
•
•
Dead spots, such as behind doors or in corners that do not allow free air circulation.
Air drafts from stairwells, outside doors, or unsectioned hollow walls.
Radiant heat from the sun, fireplaces, appliances, etc.
Airflow from adjacent zones or other units.
Unheated or uncooled spaces behind the controller, such as outside walls or unoccupied
spaces.
•
Concealed pipes, air ducts, or chimneys in partition spaces behind the controller.
Zone Sensor Installation
Figure 3. Wall-mounted zone sensor dimensions
1. Note the position of the setpoint adjustment knob and gently pry the adjustment knob from the
cover using the blade of a small screwdriver.
2. Insert the screwdriver blade behind the cover at the top of the module and carefully pry the
cover away from the base.
3. To install the zone sensor module without a junction box (directly to the wall):
a. Using the module base as a template, mark the rectangular cutout for the control wiring and
module installation holes. Ensure the base is level.
b. Set the base aside and make the cutout. Then, drill two 3/16” diameter holes approximately
one-inch deep. Insert and fully seat the plastic anchors.
c. Pull the control wires through the cutout and attach the module to the wall using the screws
provided.
4. To install the zone sensor module to a standard junction box:
a. Level and install a 2” x 4” junction box (installer supplied) vertically on the wall.
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Installation Controls
b. Pull the control wires through the cutout. Attach the module to the wall using the screws
provided.
5. Stripthe insulationonthe interconnection wiresback0.25inchandconnecttoTB1. Screwdown
the terminal blocks.
6. Replace the zone sensor cover and adjustment knob.
p. 27 for more information.
Communication Wiring
Units with Tracer ZN510 or ZN520 only
Note: Communication link wiring is a shielded, twisted pair of wire and must comply with
applicable electrical codes.
Follow these general guidelines when installing communication wiring on units with either a
Tracer™ ZN510 or ZN520 controller:
•
•
•
Maintain a maximum 5000 ft. aggregate run
Install all communication wiring in accordance with the NEC and all local codes.
Solder the conductors and insulate (tape) the joint sufficiently when splicing communication
wire. Do not use wire nuts to make the splice.
•
•
Do not pass communication wiring between buildings because the unit will assume different
ground potentials.
Do not run power in the same conduit or wire bundle with communication link wiring.
Service Communication Wiring
Establish service communication using Rover™ service software connected to the Tracer™ ZN
controller using a twisted wire pair to one of the following connection points:
•
•
Remote zone sensor module
Connections on the board
This allows the technician to view and edit the Tracer™ controller configuration and troubleshoot
the unit.
Note: Unit control options and field wiring practices may limit the controller’s communication
ability.
Route interconnecting wiring from the Tracer™ controller to provide service communication at the
wall-mounted zone sensor module. Install wiring by referencing the unit wiring diagram and
cable (provided with the Rover™ service tool) to the telephone style RJ11 connection on the zone
sensor module. Attach the other end of the cable to a computer running Trane Rover software to
communicate.
Zone Sensors Without Interconnecting Wiring
Establish servicecommunication tothe Tracer™ZNcontrollerbywiring directlytotheboard inside
the control box. Refer to the unit-wiring diagram for appropriate communication terminals on the
board.
Once wiring is complete, Use Trane Rover™softwareto communicate to the Tracer™ ZN controller.
Tracer Communications
Tracer™ ZN controllers have Comm5 communication ports. Typically, a communication link is
applied between unit controllers and a building automation system. Communication also is
possible via Rover™, Trane’s service tool.
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Installation Controls
Peer-to-peer communication across controllers is possible even when a building automation
system is not present.You do not need to observe polarity for Comm5 communication links.
The controller provides six 0.25-inch quick-connect terminals for the Comm5 communication link
connections, as follows:
•
•
•
Two terminals for communication to the board
Two terminals for communication from the board to the next unit (daisy chain)
Two terminals for a connection from the zone sensor back to the controller
Each controller has its own unique address or I.D. number on a Neuron chip. Setting dip switches
are not required on the Tracer™ controller.
Tracer Summit Communication Wiring
For Tracer™ ZN-controlled units that will interface with the Trane Tracer Summit® building
management system, terminate the communication wiring in the control box at the designated
terminals on the board. Reference the unit wiring diagram or submittals.
Ground shields at each Tracer™ ZN controller, taping the opposite end of each shield to prevent
any connection between the shield and anther ground. Refer to Trane publication CNT-SVX04A-EN,
Tracer ZN.520 Unit Controller - Installation, Operation and Programming Guide, for the
communication wiring diagram.
Communication wire must conform to the following specification:
•
•
•
•
Shielded twisted pair 18 AWG
Capacitance 23 (21-25) picofarads (pF) per foot
Listing/Rating – 300V 150C NEC 725-2 (b) Class 2 Type CL2P
Trane Part No. 400-20-28 or equivalent, available through Trane BAS Buying Group Accessories
catalog.
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Installation Electrical
Unit Wiring Diagrams
Specific unit wiring diagrams are provided on the inside of the control panel door. Typical unit
analysis.
ƽ WARNING
Grounding Required!
Follow proper local and state electrical codes for requirements on grounding. Failure to follow
code could result in death or serious injury.
Supply Power Wiring
Wiring must conform to NEC and all applicable code requirements.
It is the installer’s responsibility to provide adequately-sized power wires and proper unit
grounding.
Bring supply wiring through provided equipment knockouts located at the power connection point
on the unit. Equipment submittals should be referred to for the exact electrical access connection
point. Connect the power wires to the power connection point provided.
Connection to the installer-provided ground path must be made to the green wire or green
grounding screw provided on each unit.
Locate unit wiring diagrams on the inside of the control box cover. Refer to the unit-specific wiring
diagrams for wiring, connection point, and fuse installation information. Refer to the unit
nameplate for unit-specific electrical information, such as voltage, minimum circuit ampacity
(MCA), and maximum fuse size (MFS).
ƽ WARNING
Hazardous Voltage!
Disconnect all electric power, including remote disconnects before servicing. Follow proper
lockout/tagout procedures to ensure the power can not be inadvertently energized. Failure to
disconnect power before servicing could result in death or serious injury.
NOTICE
Use copper conductors only!
Unit terminals are not designed to accept other conductor types. Failure to use copper
conductors could cause equipment damage.
NOTICE
Correct phase critical!
Correct phase sequence is critical. If phase sequence of the incoming line voltage is not correct,
it could cause motor damage.
Electrical Connections
Units have one of three different connection points, depending on the unit type and options.
1. If the unit has no controls: power and ground are tucked inside of the handy box.
2. If the unit has a control interface or Tracer™ ZN controller: power and ground are inside the
control box. If the unit has a control interface or a Tracer controller, the power wires and ground
wire are inside the control box connected to a non fused disconnect switch.
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Installation Electrical
3. If the unit has a electric heat: power and ground connections are inside the electric heat control
box, connected to a non-fused disconnect switch or terminal block.
Electrical Grounding Restrictions
ƽ WARNING
Hazardous Voltage!
Disconnect all electric power, including remote disconnects before servicing. Follow proper
lockout/tagout procedures to ensure the power can not be inadvertently energized. Failure to
disconnect power before servicing could result in death or serious injury.
All sensor and input circuits are normally at or near ground (common) potential. When wiring
sensors and other input devices to the Tracer™ ZN controller, avoid creating ground loops with
grounded conductors external to the unit control circuit. Ground loops can affect the measurement
accuracy of the controller.
Note: Unit transformer IT1 provides power to the blower coil unit only and is not intended for field
connections. Field connections to the transformer IT1 may cause immediate or premature
unit component failure.
All input/output circuits (except isolated relay contacts and optically-isolated inputs) assume a
grounded source, either a ground wire at the supply transformer to control panel chassis, or an
installer supplied ground.
Note: Do not connect any sensor or input circuit to an external ground connection.
The installer must provide interconnection wiring to connect wall mounted devices such as a zone
sensor module. Refer to the unit wiring schematic for specific wiring details and point-to-point
wiring connections. Dashed lines indicate field wiring on the unit wiring schematics. All
interconnection wiring must conform to NEC Class 2 wiring requirements and any state and local
device.
Table 12. Zone sensor maximum wiring distances, ft (m)
Wire size range
Max. wiring distance
16–22 AWG
200 (60.96)
Note: Do not bundle or run interconnection wiring in parallel with or in the same conduit with any
high voltage wires (110V or greater). Exposure of interconnection wiring to high voltage
wiring, inductive loads, or RF transmitters may cause radio frequency interference (RFI). In
addition, improperseparationmaycauseelectricalnoiseproblems. Therefore, useshielded
wire (Beldon 83559/83562 or equivalent) in applications that require a high degree of noise
immunity. Connect the shield to the chassis ground and tape at the other end.
Minimum Circuit Ampacity (MCA) and Maximum Fuse Size (MFS) Calculations
for Units with Electric Heat
Use these formulas to calculate the MCA and MFS.
Heater amps = (heater kW x 1000)/heater voltage
Note: Use 120V heater voltage for 115V units. Use 240V heater voltage for 230V units. Use 480V
heater voltage for 460V units. Use 600V heater voltage for 575V units.
MCA = 1.25 x (heater amps + all motor FLAs)
MFS or HACR type circuit breaker = (2.25 x largest motor FLA) + second motor FLA + heater amps
(if applicable)
HACR (Heating, Air-Conditioning and Refrigeration) type circuit breakers are required in the branch
circuit wiring for all units with electric heat.
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Installation Electrical
Select a standard fuse size or HACR type circuit breaker equal to the MCA.
Use the next larger standard size if the MCA does not equal a standard size.
Standard fuse sizes are: 15, 20, 25, 30, 35, 40, 45, 50, 60 amps
Useful Formulas
kW = (cfm x ΔT)/3145
ΔT = (kW x 1000)/voltage
Single phase amps = (kW x 1000)/voltage
Three phase amps = (kW x 1000)/(voltage x 1.73)
Electric heat MBh = (Heater kW) (3.413)
Table 13. Available electric heat, min–max (kW)
Unit size
54
Voltage
115/60/1
208/60/1
230/60/1
277/60/1
208/60/3
230/60/3
460/60/3
575/60/3
220/50/1
240/50/1
380/50/3
415/50/3
190/50/3
Notes:
12
18
24
36
72
90
1–3
1–4
1–4
1–4
1–4
1–4
1.5–4
2–4
1–4
1–4
1–4
1.5–4
N/A
1–3
1–6
1–6
1–6
1–6
1–6
1.5–5
2–4
1–6
1–6
1–5
1.5–5
N/A
1–3
1–8
1–8
1–8
1–8
1–8
1–8
1–8
1–8
1–8
1–8
1–8
N/A
1–3
1–3
1–3
1–3
1–8
1–8
1–8
1–8
1–8
1–8
1–8
1–8
1–11
1–11
1–11
1–11
1–11
1–8
1–11
1–12
1–12
1–16
1–16
1–8
1–11
1–12
1–12
1–21
1–21
1–8
1–11
1–12
1–12
1–30
1–30
1–8
1–8
1–8
1–8
1–8
1–11
1–11
N/A
1–16
1–16
N/A
1–20
1–21
N/A
1–28
1–30
N/A
1. Heaters are available in the following Kw increments: 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5,
6.0, 6.5, 7.0, 7.5, 8.0, 9.0, 10.0, 11.0, 12.0, 13.0, 14.0, 15.0, 16.0, 17.0, 18.0,19.0, 20.0, 21.0,
22.0, 24.0, 26.0, 28.0, 30.0.
2. Magnetic contactors are standard. Mercury contactors are available on horizontal units only.
3. Units with electric heat are available with or without door interlocking disconnect switch.
4. Units with electric heat are available with or without line fuses.
5. Units with electric heat must not be run below the minimum cfm listed in the general data section.
6. Electric heat is balanced staging: 1 stage = 100%, 2 stages = 50%/50%
7. Electric heat is not available on 190/50/3 units.
8. For two-speed units not being controlled by the Tracer™ family of controls, a 0.2-second delay for
speed switching needs to be incorporated into the control sequence.
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Table 14. Motor electrical data
Voltage
Voltage range
rpm
Rated hp
1/3
lb
18
21
29
29
FLA
5.8
LRA
22.8
30.4
58.4
58.4
115/60/1
104–126
1750
1/2
7.2
3/4
12.0
12.8
1.0
Two-speed
115/60/1
104–126
187–253
1750/1160
1750
3/4
1.0
1/3
1/2
3/4
1.0
1/3
1/2
3/4
1.0
1/2
3/4
1.0
1.5
2.0
3.0
1/2
3/4
1.0
1.5
2.0
3.0
1/2
3/4
1.0
1.5
2.0
3.0
3/4
1.0
1.5
2.0
3.0
40
41
8.9/6.1
11.5/8.1
3.1
3.6
6.0
6.4
2.5
3.6
4.3
5.6
2.3
2.9
3.5
4.8
6.2
8.6
2.4
3.0
3.6
4.8
6.2
8.6
1.2
1.5
1.8
2.4
3.1
4.3
1.1
1.4
1.9
2.5
3.3
42.0
58.2
11.4
15.2
29.2
29.2
12.1
19.3
25.3
32.6
11.4
15.9
20.2
30.0
38.5
55.1
12.8
18.6
23.0
33.4
43.6
62.0
6.4
208–230/60/1
18
21
29
29
277/60/1
249–305
187–229
1750
1750
15.5
21.5
25
29
208/60/3
22
26
28
29
34
49
230/60/3
460/60/3
575/60/3
207–253
414–506
518–632
1750
1750
1750
22
26
28
29
34
49
22
26
9.3
28
11.5
16.7
21.8
31.0
7.5
29
34
49
20.5
22.5
31
9.0
13.3
17.9
23.7
36
49
Note: For two-speed units not being controlled by the Tracer™ family of controls, a 0.2-second delay for speed switching needs
to be incorporated into the control sequence.
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Table 14. Motor electrical data (continued)
Voltage
Voltage range
rpm
Rated hp
1/3
1/2
3/4
1.0
lb
20.5
25
29
38
20.5
25
29
38
22
26
28
29
34
49
22
26
28
29
34
49
FLA
3.0
3.6
5.2
9.3
3.3
4.0
5.5
10.6
1.1
1.4
1.7
2.1
2.8
3.6
1.2
1.5
1.9
2.5
3.1
3.6
LRA
15.6
20.5
25.6
52.2
17.1
22.7
39.1
57.8
5.6
220/50/1
198–242
1450
240/50/1
216–264
1450
1450
1/3
1/2
3/4
1.0
190/50/3
380/50/3
171–209
342–418
1/3
1/2
3/4
1.0
7.8
9.8
14.6
18.7
27.2
6.8
1.5
2.0
415/50/3
374–456
1450
1/3
1/2
3/4
1.0
9.4
11.0
17.4
22.6
32.3
1.5
2.0
Note: For two-speed units not being controlled by the Tracer™ family of controls, a 0.2-second delay for speed switching needs
to be incorporated into the control sequence.
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ƽ WARNING
Hazardous Voltage!
Disconnect all electric power, including remote disconnects before servicing. Follow proper
lockout/tagout procedures to ensure the power can not be inadvertently energized. Failure to
disconnect power before servicing could result in death or serious injury.
Installing the Unit
Follow the procedures below to install the blower coil unit.
Horizontal Units, Model BCHC
Install horizontal units suspended from the ceiling with 3/8” threaded rods that are field provided.
There are two knockouts in each corner of the unit for installation of the threaded rods. Ensure the
ceiling opening is large enough for unit installation and maintenance requirements.
BCHC Installation Procedure
Materials needed:
•
•
•
•
threaded rods, 3/8” (4)
nuts (8)
flat washers or steel plates (8)
vibration isolator hangers or turnbuckles (4)
1. Determine the unit mounting hole dimensions. Prepare the hanger rod isolator assemblies,
whicharefieldprovided, andinstallthemintheceiling. Tranerecommendsusingthreadedrods
Figure 4. How to hang the horizontal unit from the ceiling
2. Remove motor access panels and filter access panels.
3. Punch out the eight knockouts in the top and bottom panels.
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4. Guide the threaded rod through the unit from the top, careful not to damage insulation or
Figure 5. When inserting the threaded rod though the unit knockouts, angle it through the top,
careful not to damage unit coil or insulation.
Figure 6. Correct placement of washer or steel plate and nut between threaded rod and unit.
This helps prevent air leakage.
6. Put a nut and flat washer or steel plate on the top to prevent air leakage.
7. Thread the top of the rod into the isolator or turnbuckle.
for details).
9. Level the unit for proper coil drainage and condensate removal from the drain pan. Refer to
Vertical Units, Model BCVC
Install vertical units on the floor. Units are provided with legs that are field-installed to help
accommodate a U-trap on the drain connection, if necessary. A field-fabricated inlet plenum is not
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required. The unit is shipped in two pieces, and can be arranged in either a pre-swirl or counter-
Figure 7. Typical vertical unit installation
Heating Coil Option
Note: The hydronic heating coil option is factory installed in either the reheat or preheat position.
Coils can be rotated for either right or left-hand connections.
If you need to rotate the hydronic heating coil option to change the coil connection side, follow the
procedure below.
1. Remove both coil access panels.
2. Remove the coil and rotate to change connection position.
3. Exchange coil patch plates.
4. Knock out drain pipe connections on new coil hand access panel.
5. Plug old drain connections.
Mixing Box Option
Materials provided:
mounting legs
•
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Installation Mechanical
•
interconnecting linkage, LH or RH attachment
Materials needed:
•
•
grooved and extendible drive rods, 1/2-inch O.D. grooved
screws
The mixing box option ships separately for field installation. It has two low-leak, opposed blade
dampers and all necessary interconnecting linkage components for left or right hand attachment
onto 1/2-inch O.D. grooved, extendible drive rods. Also, mounting legs are provided for floor
mounting on a vertical unit. Knockouts are provided to suspend the mixing box from the ceiling
horizontally.
Mixing Box Installation Procedure
1. Support the mixing box independent of the unit in the horizontal position.
2. Install the mixing box as a sleeve around the duct collar of the filter frame. To attach the mixing
box to the filter frame, insert screws through the matching the holes on all sides of the mixing
box and filter frame.
3. Install the linkage, following the procedure below.
Linkage Installation Procedure
1. Attach the linkage on either the right or left side of the mixing box following the procedure
below.
2. Open the damper blades fully. Locate drive rods on the LH or RH side for linkage attachment.
Loosen drive rod set screw, without removing.
3. Remove knockouts on side access panel adjacent to the drive rods.
4. Pierce a hole through the insulation at the knockouts to allow the drive rod to extend freely
through side of mixing box. Cut away insulation sufficiently to allow drive rod to turn smoothly.
5. Extend drive rod end at desired position beyond side of unit. Tighten drive rod set screws.
6. Attach linkage and tighten all set screws. Note that neither hand levers are provided. However,
mixing box actuators are a factory-provided option that ship inside the mixing box when
ordered.
7. Position linkage so both sets of dampers operate freely and so that when one damper is fully
open, the other is fully closed.
Condensate Drain Connections
Note: It is the installer’s responsibility to provide adequate condensate piping to prevent potential
water damage to the equipment and/or building.
Size the main drain lines and trap them the same size as the drain connection, which is 3/4”
schedule 40 PVC, 1.050” O.D. on blower coils.
If drain pan removal is required, make the main and auxiliary drain connections with compression
fittings. Follow the procedure below to remove the drain pan.
1. Remove the opposite side coil access panel.
2. Remove the drain pan clips.
3. Disconnect drain lines.
4. Remove the sheet metal screw.
5. Pull out drain pan through the opposite side.
Note: Prime drain traps to prevent the drain pan overflow.
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Plug or trap the auxiliary connection to prevent air from being drawn in and causing carryover (see
Figure 8).
Figure 8. Recommended drain trap installation for draw-through units
‘
H = 1” of length for each 1” of negative pressure + 1”additional
J = 1/2 of H
L = H + J + pipe diameter + insulation
All drain lines downstream of the trap must flow continuously downhill. If segments of the line are
routed uphill, this can cause the drain line to become pressurized. A pressurized drain line may
cause the trap to back up into the drain pan, causing overflow.
Duct Connections
Install all air ducts according to the National Fire Protection Association standards for the
“Installation of Air Conditioning and Ventilation Systems other than Residence Type (NFPA 90A)
and Residence Type Warm Air Heating and Air Conditioning Systems (NFPA 90B).
Make duct connections to the unit with a flexible material such as heavy canvas to help minimize
noise and vibration. If a fire hazard exists, Trane recommends using Flexweave 1000, type FW30
or equivalent canvas. Use three inches for the return duct and three inches for the discharge duct.
Keep the material loose to absorb fan vibration.
Run the ductwork straight from the opening for a minimum of 1-1/2 fan diameters. Extend
remaining ductwork as far as possible without changing size or direction. Do not make abrupt turns
or transitions near the unit due to increased noise and excessive static losses. Avoid sharp turns
and use elbows with splitters or turning vanes to minimize static losses.
Poorly constructed turning vanes may cause airflow generated noise. Align the fan outlet properly
with the ductwork to decrease duct noise levels and increase fan performance. Check total external
static pressures against fan characteristics to be sure the required airflow is available throughout
the ductwork.
To achieve maximum acoustical performance, minimize the duct static pressure setpoint.
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Installation Piping
Water Coil Connections
Water coils have sweat connections. Reference coil connection dimensions in “Dimensions and
prevent operational damage. Water inlet and outlet connections extend through the coil section
Figure 9. Horizontal unit coil connect location
NOTICE
Potential coil-freeze condition!
Make provisions to drain the coil when not in use to prevent coil freeze-up. Failure to follow this
procedure could result in equipment/property damage.
Piping Packages
Piping packages ship separate for field installation and have sweat type connections.
Interconnecting piping is field provided.
When brazing piping, follow these guidelines to prevent piping component damage.
1. Avoid exposing piping components to high heat when making sweat connections.
2. Protect the closest valve to the connection with a wet rag.
3. Ensure the circuit balancing valve option is in the unseated position.
Refrigerant Coil Piping
The DX cooling coil in a BCHC/BCVC unit is equipped with a single distributor (single-circuited).
Exception: size 72 and 90 six-row DX cooling coils are horizontally split and have two distributors
(double-circuited) which may be manifolded to a single refrigeration circuit in a condensing unit.
Some condensing units have two, independent refrigeration circuits. Do not manifold two,
independent refrigeration circuits into a single-circuited DX (evaporator) coil.
Note: Refer to “Warnings, Cautions and Notices” for information on handling refrigerants.
Units that are UL listed shall not have refrigerant temperatures and pressures exceeding that listed
on the unit nameplate.
Follow accepted refrigeration piping practices and safety precautions for typical refrigerant coil
piping and components. Specific recommendations are provided with the compressor unit,
including instructions for pressure-testing, evacuation, and system charging. Leak test the entire
refrigerant system after all piping is complete. Charge the unit according to approximate weight
requirements, operating pressures, and superheat/subcooling measurements. Adjust the thermal
expansion valve setting, if necessary, for proper superheat.
Liquid Line
Line Sizing. Properly sizing the liquid line is critical to a successful application. If provided, use
the liquid line size recommended by the manufacturer of the compressor unit. The selected tube
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diameter must be as small as possible, while still providing at least 5°F [2.7°C] of subcooling at the
expansion valve throughout the operating envelope.
Routing. Install the liquid line with a slight slope in the direction of flow so that it can be routed
with the suction line. Minimize tube bends and reducers because these items tend to increase
pressure drop and reduce subcooling at the expansion valve.
Insulation. The liquid line is generally warmer than the surrounding air, so it does not require
insulation.
Components. Liquid-line refrigerant components necessary for a successful job include an
expansion valve, moisture indicating sight glass, filter drier, manual ball shutoff valves, access
port, and possibly a solenoid valve. Position these components as close to the evaporator as
possible.
•
Thermal expansion valve (TEV)
Select the TEV based on the actual evaporator capacity, considering the full range of loadings.
Verify that the valve will successfully operate at the lightest load condition, considering if hot
gas bypass is to be used. For improved modulation, choose a TEV with balanced port
construction and an external equalizer connection. The valve must be designed to operate
against a back pressure of 20 psi higher than actual evaporator pressure. Install the TEV directly
on the coil liquid connection (distributor provided).
The remote expansion-valve bulb should be firmly attached to a straight, well-drained,
horizontal section of the suction line. The external equalizer line should be inserted
downstream of the remote bulb.
•
•
Moisture-indicating sight glass
Install a moisture-indicating sight glass in the liquid line between the expansion valve and filter
drier. The sight glass should be sized to match the size of the liquid line.
Filter drier
Install a properly sized liquid line filter-drier upstream from the expansion valve and as close
to the evaporator coil as possible. Select the filter-drier for a maximum pressure drop of 2 psi
at the design condition.
Manual, ball-type shutoff valves on either side of the filter drier allows replacement of the core
without evacuating the entire refrigerant charge.
•
•
Access port
The access port allows the unit to be charged with liquid refrigerant and is used to determine
subcooling. This port is usually a Schraeder valve with a core.
Solenoid valve
If required by the compressor unit, install the solenoid valve between the filter drier and sight
glass.
NOTICE
Valve Damage!
Disassemble the thermal expansion valve before completing the brazing connections. If
necessary, wrap the valve in a cool wet cloth while brazing. Failure to protect the valve from
high temperatures could damage internal components.
Suction Line
Line sizing. Properly sizing the suction line is critical for ensuring that the oil returns to the
compressor throughout the system operating envelope. If provided, use the suction line size(s)
recommended by the manufacturer of the compressor unit. The selected tube diameter(s) must
maintain adequate refrigerant velocities at all operating conditions.
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Routing. To prevent residual or condensed refrigerant from “free-flowing” toward the
compressor, install the suction line so it slopes slightly—1 inch per 10 feet of run [1 cm per 3 m]—
toward the evaporator. Avoid putting refrigerant lines underground. Refrigerant condensation,
installation debris inside the line, service access, and abrasion/corrosion can quickly impair system
reliability.
Insulation. After operating the system and testing all fittings and joints to verify the system is
leak-free, insulate the suction lines to prevent heat gain and unwanted condensation.
Components. Installing the suction line requires field installation of these components: an
access port and possibly a suction filter. Position them as close to the compressor as possible.
•
Access port
The access port is used to determine suction pressure and adjust the TEV. It should be located
near the external equalizer line connection. This port is usually a Schraeder valve with a core.
•
Suction filter
If required by the compressor unit, a replaceable-core suction filter is installed as close to the
compressor unit as possible. Adding manual, ball-type shutoff valves upstream and
downstream of the filter simplifies replacement of the filter core.
Field-Installing Evaporator Piping
1. Pitch the liquid line slightly—1 in./10 ft [1 cm/3 m]—so that the refrigerant drains toward the
evaporator.
2. Provide one expansion valve per distributor.
3. Slightly pitch the outlet line from the suction header toward the suction riser — that is, 1 in./10
ft [1 cm/3 m] in the direction of flow. Use the tube diameter that matches the suction-header
connection.
4. For the vertical riser, use the tube diameter recommended by the condensing unit
manufacturer. Assure the top of the riser is higher than the evaporator coil.
5. Arrange the suction line so the refrigerant vapor leaving the coil flows downward, below the
suction-header outlet, before turning upward.
6. Pitch the suction line slightly—1 in./10 ft [1 cm/3 m]—so the refrigerant drains toward the
evaporator.
7. Insulate the suction line.
Figure 10. Field-installed evaporation piping example
Evaporator Coil with
Standard Circuiting
suction line
liquid
line
sight
glass
thermal
expansion
solenoid filter drier
valve
valve (TXV)
distributor
40
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Installation Piping
Steam Piping
Proper installation, piping and trapping is necessary to insure satisfactory heating coil operation
and prevent operational damage under service conditions. These installation recommendations
operation.
General
1. Support all piping independently of coils.
2. Provide swing joints or flexible fittings in all piping connections adjacent to heating coils to
absorb expansion and contraction strains.
3. Install coils so air passes through fins in proper direction (stenciled on top of coil channel).
Steam Coils
NOTICE
Coil Condensate!
Condensate must flow freely from the coil at all times to prevent coil damage from water
hammer, unequal thermal stresses, freeze-up and/or corrosion. In all steam coil installations, the
condensate return connections must be at the low point of the coil. Failure to follow these
instructions could result in equipment damage.
1. Install 1/2-inch 15-degree swing check vacuum breaker in unused condensate return tapping as
close as possible to coil. Vent vacuum breaker line to atmosphere or connect into return main
at discharge side of steam trap. Vacuum relief is particularly important when coil is controlled
by modulating steam supply or two-position (on-off) automatic steam supply valve.
2. Proper steam trap selection and installation is necessary for satisfactory coil performance and
service life.
a. Select trap based on maximum possible condensate rate and recommended load factors.
b. Locate steam trap discharge at least 12 inches below condensate return tapping. This
provides sufficient hydrostatic head pressure to overcome trap losses and assure complete
condensate removal.
c. Float and thermostatic traps are preferred because of gravity drain and continuous
discharge operation.
d. Use float and thermostatic traps with atmospheric pressure gravity condensate return with
automatic controls or where possibility of low pressure supply steam exists.
e. Bucket traps should only be used when supply steam is unmodulated and 25 psig or higher.
f. Wheninstalledwithseriesairflow, sizetrapsforeachcoilusingcapacityoffirstcoilinairflow
direction.
g. Always trap each coil separately to prevent condensate holdup in one or more coils.
h. Always install strainers as close as possible to inlet side of trap.
3. Use V-port modulating valves to obtain gradual modulating action or slow opening 2-position
valves to prevent steam hammer.
Note: Contact the factory for recommendations regarding steam coil valve selections
compatible with Tracer™ ZN controllers.
4. Use normally-open non-modulating control valves if coils are exposed to freezing air.
Note: Contact the factory for recommendations regarding steam coil valve selections
compatible with Tracer™ ZN controllers.
5. Control each coil bank separately when installing coils for series airflow with automatic steam
control valves.
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Installation Piping
6. Do not modulate steam or use on-off supply control on systems with overhead or pressurized
returns unless condensate is drained by gravity to receiver (vented to atmosphere) and
returned to main by condensate pump.
7. At startup with dampers, slowly turn steam on full for at least 10 minutes before opening fresh
air intake.
8. Pitch all supply and return steam piping down a minimum of one inch per 10 feet in direction
of flow.
9. Do not drain steam mains or take-offs through coils. Drain mains ahead of coils through steam
trap to return line.
10. Do not bush or reduce coil return tapping size. Run return pipe full size of steam trap connection
except for short nipple screwed directly into coil condensate connection.
11. Overhead returns require 1 psig pressure at steam trap discharge for each 2-foot elevation to
assure continuous condensate removal.
Figure 11. Type NS steam coils, horizontal tubes for horizontal airflow
Code of System Components
FT = Float and thermostatic steam trap
BT = Bucket steam trap
GV = Gate valve
OV = Automatic two-position (on-off) control
valve
TV = Automatic three-way control valve
VB = Vacuum breaker, 15-degree swing check
valve
CV = Check valve
ST = Strainer
AV = Automatic or manual air vent
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Controls Interface
Control Options
Blower coil air handlers are available without controls or with one of four different control options:
Control interface
Tracer™ ZN010
•
•
•
•
Tracer ZN510
Tracer ZN520
Units without controls have a junction box mounted on the drive side for motor power wire
terminations. The controller is easily accessible in the control box for service. Control option
descriptions follow below.
Control Interface
The control interface is for use with a field–supplied low voltage thermostat. It includes a control
box with a transformer, motor contactor, and disconnect switch. All hot leads to the motor are
disconnected at the contactor and disconnect switch to eliminate the risk of shock during service.
The end devices are mounted with the wires pulled and terminated inside the two-sided terminal
strip. All customer connections other than power are on the outside of the two-sided terminal strip.
Tracer Controllers
The Tracer™ family of controllers—ZN010, ZN510, and ZN520—offer the combined advantages of
simple and dependable operation with the latest Trane-designed controller. Standard control
features include options normally available on more elaborate control systems. All control options
are available factory-configured or can be field-configured using Rover™ service software. For
more detailed information, refer to Trane publication CNT-IOP-1, Installation, Operation, and
Programming Guide (for ZN010 or ZN510), or CNT-SVX04A-EN, Installation, Operation, and
Programming Guide (for ZN520).
Tracer ZN010
Tracer™ ZN010 is a stand-alone microprocessor controller.
Tracer ZN510 and ZN520
The Tracer™ ZN510 controller can be used as either a standalone or as part of a Trane Integrated
Comfort™ System (ICS).
Figure 12. ZN510 control board
Figure 13. ZN520 control board
In the stand-alone configuration, ZN510 or 520 receives operation commands from the zone sensor
and/or the auto changeover sensor (on auto changeover units). ZN520 also receives commands
from the discharge air sensor. The entering water temperature is read from the auto changeover
sensor and determines if the unit is capable of cooling or heating. The zone sensor module is
capable of transmitting the following information to the controller:
•
Timed override on/cancel request
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Controls Interface
•
•
•
Zone setpoint
Current zone temperature
Fan mode selection (off-auto-high-low)
For optimal system performance, blower coil units can operate as part of an Integrated Comfort™
System (ICS) building automation system controlled by Tracer Summit®. The controller is linked
directly to the Summit control panel via a twisted pair communication wire, requiring no additional
interface device (i.e., a command unit). The Trane ICS system can monitor or override ZN520
control points. This includes such points as temperature and output positions.
Rover Service Software
This windows-based software package option allows field service personnel to easily monitor,
save, download, and configure Tracer™ controllers through a communication link from a portable
computer. When connected to the communication link, Rover™ can view any Tracer controller that
is on the same communication link.
Table 15. Tracer controller input/output summary
Tracer™ controller
ZN010
ZN510
ZN520
Binary outputs
2-speed fan
•
•
•
•
•
•
•
•
•
•
2-position hydronic valve
2-position mixing box damper
1-stage electric heat
Modulating mixed air damper
Modulating hydronic valve
2-stage electric heat
Reheat (hydronic)
Generic
•
•
•
•
•
•
•
•
Binary inputs
Condensate overflow detection
Low temperature detection
Occupancy
•
•
•
•
•
•
•
•
•
•
•
•
Generic input
Analog inputs
Zone temperature
Setpoint
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Fan mode: auto, high, low
Entering water
Discharge air
Outside air
Generic
Notes:
1. The generic input and output are for use with a Tracer Summit® systems only.
2. Contact the factory for recommendations regarding steam coil valve selections compatible with Tracer™ ZN controllers.
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Controls Interface
Table 16. Tracer controller function summary
Tracer™ Controller
ZN010
ZN510
ZN520
Control functions
Entering water temp. sampling (purge)
Timed override
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Auto changeover
Fan cycling
Warm-up
•
•
•
•
•
•
•
Pre-cool
Data sharing (master/slave)
Random start
•
Dehumidification
Staged capacity (2-stage electric supplementary)
DX cooling
Other Functions
Manual test
•
•
•
•
•
•
•
•
•
Filter maintenance timer
Setpoint limits
Table 17. End Device Option Availability
Tracer™
Control
Device
ZN010
Tracer ZN510 Tracer ZN520
interface
Condensate float switch
Low limit
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Filter status
Filter run-time diagnostic
Fan status
•
•
•
•
•
•
•
Positive proof fan status switch
2-position control valves
Modulating control valves
2-position mixing box actuator
Modulating mixing box actuator
1-stage electric heat
2-stage electric heat
Frostat™ protection (DX coils)
Notes:
•
•
•
•
•
•
•
•
•
•
1. The Tracer ZN010, Tracer ZN510, and Tracer ZN520 are factory-provided controls that control the end devices listed in
the table.
2. The control interface option is the wiring tied back to a terminal strip to be controlled by a field-supplied controller.
3. Units with a DX coil are provided with a DX cool relay if unit has the control interface or Tracer controls.
4. Contact the factory for recommendations regarding steam coil valve selections compatible with Tracer™ ZN controllers.
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Pre-Start
Pre-Start Checklist
Complete this checklist after installing the unit to verify all recommended installation procedures
are complete before unit startup. This does not replace the detailed instructions in the appropriate
sections of this manual. Disconnect electrical power before performing this checklist. Always read
the entire section carefully to become familiar with the procedures.
ƽ WARNING
Hazardous Voltage!
Disconnect all electric power, including remote disconnects before servicing. Follow proper
lockout/tagout procedures to ensure the power can not be inadvertently energized. Failure to
disconnect power before servicing could result in death or serious injury.
Receiving
ꢀ Inspect unit and components for shipping damage. File damage claims immediately with the
delivering carrier.
ꢀ Check unit for missing material. Look for ship-with drives, isolators, filters, and sensors that are
packaged separately and placed inside the main control panel, fan section, or compressor section
ꢀ Check nameplate unit data so that it matches the sales order requirements.
Unit Location
ꢀ Remove crating from the unit. Do not remove the shipping skid until the unit is set in its final
position.
ꢀ Ensure the unit location is adequate for unit dimensions, ductwork, piping, and electrical
connections.
ꢀ Ensure access and maintenance clearances around the unit are adequate. Allow space at the end
Unit Mounting
ꢀ Place unit in its final location.
ꢀ Remove shipping skid bolts and skid.
ꢀ If using isolators, properly mount unit according to the isolator placement sheet.
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Pre-Start
Component Overview
ꢀ Verify the fan and motor shafts are parallel.
ꢀ Verify the fan and motor sheaves are aligned.
ꢀ Check the belt tension for proper adjustment. Adjust the belt tension if it is floppy or squeals
continually.
ꢀ Ensure the fan rotates freely in the correct direction.
ꢀ Tighten locking screws, bearing set screws and sheaves.
ꢀ Ensure bearing locking collars do not wobble when rotated and correct torque settings. Refer to
ꢀ Verify that a clean air filter is in place.
Ductwork
ꢀ If using return ductwork to the unit, secure it with three inches of flexible duct connector.
ꢀ Extend discharge duct upward without change in size or direction for at least one and one half
fan diameters.
ꢀ Use a 3” flexible duct connection on discharge ductwork.
ꢀ Ensure trunk ductwork is complete and secure to prevent leaks.
ꢀ Verify that all ductwork conforms to NFPA 90A or 90B and all applicable local codes
Unit Piping
ꢀ Verify the condensate drain piping is complete for the unit drain pan. Install and tighten the
condensate “P” trap drain plug.
ꢀ Make return and supply water connections to the unit and/or piping package.
ꢀ Ensure the drain pan and condensate line are not obstructed. Remove any foreign matter that
may have fallen into the drain pan during installation.
ꢀ Verify that piping does not leak. Make sure drain lines are open while performing the leak test.
ꢀ Treat water to prevent algae, slime, and corrosion.
ꢀ Connect refrigerant piping lines.
ꢀ Connect steam supply lines and condensate return lines to coil in accordance with steam piping
recommendations.
Electrical
ꢀ Check all electrical connections for tightness.
ꢀ Verify motor voltage and amps on all phases with the unit nameplate ratings to ensure unit
operates correctly.
Unit Panels
ꢀ Ensure all unit access panels arein place and that all screws, nuts, and bolts are tightened to their
proper torques.
Note: During the unit break-in period, bearing temperature may be 150–160°F. during normal
operation bearing temperature should range be 90–100°F.
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Start-Up
Sequence of Operation
Tracer ZN Controller Sequence of Operation
Controller Start-Up
Refer to Trane publication CNT-SVX04A-EN, Installation, Operation, and Programming Guide, to
operate the Tracer™ ZN controller with Trane Integrated Comfort™ System (ICS). The factory pre-
programs the Tracer ZN controller with default values to control the temperature and unit airflow.
UseTracer Summit®buildingautomationsystemorRover™ software tochangethedefault values.
Follow the procedure below to operate the Tracer™ ZN controller in a stand-alone operation:
1. Turn power on at the disconnect switch option.
2. Position the fan mode switch to either high, low, or the auto position.
3. Rotate the setpoint dial on the zone sensor module to 55°F for cooling or 85°F for heating.
The appropriate control valve will actuate assuming the following conditions:
1. Room temperature should be greater than 55°F and less than 85°F.
2. For a two-pipe unit with an automatic changeover sensor, the water temperature input is
appropriateforthedemandplaced ontheunit. For example, coolingoperationisrequestedand
cold water (5° lower than room temperature) flows into the unit.
3. Select the correct temperature setpoint.
Note: Select and enable zone sensor temperature settings to prevent freeze damage to unit.
Power-Up Sequence
When 24 VAC power is initially applied to the Tracer™ ZN controller, the following sequence occurs:
•
•
•
•
all outputs are controlled off
Tracer reads all input values to determine initial values,
the random start time (0–25 seconds) expires, and
normal operation begins.
Tracer ZN Modes of Operation
Tracer™ ZN controllers operate the fan in one of the modes listed below as noted:
•
•
•
•
•
occupied
unoccupied
occupied standby (Tracer ZN510 or ZN520 only)
occupied bypass
Tracer Summit® with supply fan control (Tracer ZN510 or ZN520 only)
Note: The Tracer™ ZN520 controller operates the supply fan continuously when the controller is
in the occupied and occupied standby modes, for either heating or cooling. The controller
only cycles the fan off with heating and cooling capacity in the unoccupied mode.
Whenthecommunicated occupancyrequestis unoccupied, theoccupancybinaryinput(if present)
does not affect the controller’s occupancy. When the communicated occupancy request is
occupied, the controller uses the local occupancy binary input to switch between the occupied and
occupied standby modes.
Occupancy Sources
There are four ways to control the Tracer™ ZN controller’s occupancy, as noted below:
1. By pressing the zone sensor’s timed override “on” button
sensor states
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3. Default operation of the controller (occupied mode)
4. Communicated request, usually provided by the building automation system (BAS) or peer
device (available on Tracer™ ZN510 and ZN520 only)
Table 18. Occupancy sensor state
Sensor type
Normally open
Normally open
Normally closed
Normally closed
Sensor position
Open
Unit occupancy mode
Occupied
Closed
Unoccupied
Open
Unoccupied
Closed
Occupied
A communicatedrequestwillcontrolthe controller’soccupancy. Typically, thisrequestcomesfrom
the BAS time-of-day scheduling to the controller. However, if a communication request from a BAS
or peer controller is lost, the controller reverts to the default operating mode (occupied) after 15
minutes (configurable, specified by the “receive heartbeat time”), if no local hardwired occupancy
signal exists.
If the unit is communicating with Tracer Summit® and the supply fan control programming point
is configured for Tracer™ (the factory configures as local), then Tracer Summit will control the fan
regardless of the fan mode switch position.
For complete information about Tracer Summit® application setup using the Tracer™ ZN
controller, see the Tracer Summit product literature. For more information on the setup of another
BAS, refer to the product-specific literature from that manufacturer.
Occupied Mode
When the controller is in the occupied mode, the unit attempts to maintain the space temperature
at the active occupied heating or cooling setpoint, based on the:
•
•
•
•
measured space temperature,
the discharge air temperature (Tracer™ ZN520 only),
the active setpoint, and
the proportional/integral control algorithm.
The modulating control algorithm used when occupied or in occupied standby is described in the
following sections. Additional information related to the handling of the controller setpoints can
be found in the previous setpoint operation section.
Note: Heating and cooling setpoint high and low limits are always applied to the occupied and
occupied standby setpoints.
Unoccupied Mode
When the controller is in the unoccupied mode, the controller attempts to maintain space
temperature at the stored unoccupied heating or cooling setpoint based on the:
•
•
•
measured space temperature,
active setpoint, and
control algorithm, regardless of the presence of a hardwired or communicated setpoint.
Similar to other controller configuration properties, the locally stored unoccupied setpoints can be
modified using Rover™ service tool.
During cooling mode, when the space temperature is above the cool setpoint, the primary cooling
capacity operates at 100%. If more capacity is needed, the supplementary cooling capacity turns
on (or opens to 100%).
During heating mode, when the space temperature is below the heat setpoint, the primary heating
capacity turns on. All capacity turns off when the space temperature is between the unoccupied
cooling and heating setpoints. Note that primary heating or cooling capacity is defined by the unit
type and whether heating or cooling is enabled or disabled. For example, if the economizer is
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enabled (Tracer™ ZN520 only) and possible, it is the primary cooling capacity. If hydronic heating
is possible, it will be the primary heating capacity.
Occupied Standby Mode (Tracer ZN510 or ZN520 only)
The controller can be placed into the occupied standby mode when a communicated occupancy
request is combined with the local (hardwired) occupancy binary input signal.
During occupied standby mode, the Tracer™ ZN520 controller’s economizer damper position goes
to the economizer standby minimum position.
Note: The economizer standby minimum position can be changed using Rover™ service tool.
In the occupied standby mode, the controller uses the occupied standby cooling and heating
setpoints. Because the occupied standby setpoints typically cover a wider range than the occupied
setpoints, the controller reduces heating/cooling demand for the space. Also, units with Tracer™
ZN520 and the fresh air economizer damper use the economizer standby minimum position to
reduce heating and cooling demand.
When no occupancy request is communicated, the occupancy binary input switches the
controller’s operating mode between occupied and unoccupied. When no communicated
occupancy request exists, the unit cannot switch to occupied standby mode.
Occupied Bypass Mode, Tracer ZN510 or ZN520 Only
The controller can be placed in occupied bypass mode by either communicating an occupancy
bypass request to the controller or by using the timed override “on” button on the zone sensor.
When the controller is in unoccupied mode, pressing the “on” button will place the controller into
occupied bypass mode for the duration of the bypass time (typically 120 minutes).
Tracer Summit With Supply Fan Control, Tracer ZN510 or ZN520 Only
All Tracer™ ZN lockouts (latching diagnostics) are manually reset whenever the fan mode switch
issettotheoffpositionorwhenpowerisrestoredtotheunit. Thelastdiagnostictooccurisretained
until the unit power is disconnected. Refer to Trane publication CNT-SVX04A-EN, Installation,
Operation, and Programming Guide, for specific Tracer ZN520 operating procedures.
Cooling Operation
During cooling mode, the Tracer™ ZN controller attempts to maintain the space temperature at the
active cooling setpoint. Based on the controller’s occupancy mode, the active cooling setpoint is
either the:
•
•
•
occupied cooling setpoint,
occupied standby cooling setpoint (Tracer ZN510 or ZN520 only), or
unoccupied cooling setpoint.
The controller uses the measured space temperature, the active cooling setpoint, and discharge air
temperature (Tracer™ ZN520 only) along with the control algorithm to determine the requested
cooling capacity of the unit (0–100%). The outputs are controlled based on the unit configuration
and the required cooling capacity. To maintain space temperature control, the cooling outputs
(modulating or 2-position hydronic valve, or economizer damper) are controlled based on the
cooling capacity output.
Note: Economizer dampers and modulating valves are only available on units with the Tracer™
ZN520 controller. Two-position dampers are only available on units with Tracer ZN010 and
ZN510.
Cooling output is controlled based on the cooling capacity. At 0% capacity, all cooling capacities
are off and the damper is at minimum position. Between 0 and 100% capacity, the cooling outputs
are controlled according to modulating valve logic (Tracer™ ZN520 only) or cycled with 2-position
valves. As the load increases, modulating outputs open further and binary outputs are energized
longer. At 100% capacity, the cooling valve or damper is fully open (modulating valves) or on
continuously (2-position valves).
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Note: Unit diagnostics can affect fan operation, causing occupied and occupied standby fan
about abnormal fan operation.
Economizer Cooling (Tracer ZN520 Only)
The economizer provides cooling whenever the outdoor temperature is below the economizer
enable setpoint and there is a need for cooling. The economizer operates to meet the space
demand, with other forms of cooling enabling when the economizer cannot meet the demand
alone. See economizer air damper operation for additional information.
DX Cooling (Tracer ZN520 only)
The controller does not use both the DX compressor and the economizer at the same time. This
prevents problems where the entering air temperature is too low for the evaporator coil to operate
as designed, which leads to compressor short cycling due to low discharge air temperatures.
Discharge Air Tempering (Tracer ZN520 Only)
Cascade cooling control initiates a discharge air tempering function if:
•
•
•
the discharge air temperature falls below the discharge air temperature control low limit,
all cooling capacity is at minimum, and
the discharge control loop determines a need to raise the discharge air temperature.
The controller then provides heating capacity to raise the discharge air temperature to its low limit.
The discharge air tempering function enables when cold, fresh air is brought in through the fresh
air damper and causes the discharge air to fall below the discharge air temperature control low
limit. The controller exits the discharge air tempering function when heat capacity has been at 0%
for five minutes.
Heating Operation
During heating mode, the Tracer™ ZN controller attempts to maintain the space temperature at the
active heating setpoint. Based on the controller’s occupancy mode, the active heating setpoint can
be:
•
•
•
occupied heating,
occupied standby heating (Tracer ZN510 or ZN520 only), or
unoccupied heating.
Note: Unit diagnostics can affect the controller operation, causing unit operation to be defined as
operation.
Heating output is controlled based on the heating capacity. At 0% capacity, the heating output is
off continuously. Between 0 and 100% capacity, the heating output is controlled according to
modulating valve logic (ZN520 only) or cycled with 2-position valves. As the load increases,
modulating outputs open further and binary outputs are energized longer. At 100% capacity, the
modulating valve is fully open (Tracer™ ZN520 only) or on continuously with 2-position valves.
Economizer Damper (Tracer ZN520 Only)
The economizer damper option is never used for as a source for heating, but only for ventilation.
Therefore, the damper is at the occupied minimum position in the occupied mode. The damper
control is primarily associated with occupied fan operation.
Dehumidification (Tracer ZN520 only)
During dehumidification, the Tracer™ ZN520 controller adjusts the heating setpoint up to the
cooling setpoint. This reduces the relative humidity in the space with a minimum of energy usage.
The controller uses the measured space temperature, the active heating setpoint, and discharge
airtemperature(Tracer™ZN520 only)alongwiththecontrolalgorithm, todeterminetherequested
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Start-Up
heating capacity of the unit (0–100%). The outputs are controlled based on the unit configuration
and the required heating capacity.
Fan Mode Operation
WARNING
Rotating Components!
Disconnect all electric power, including remote disconnects before servicing. Follow proper
lockout/tagout procedures to ensure the power can not be inadvertently energized. Failure to
disconnect power before servicing could result in death or serious injury.
For multiple fan speed applications, the Tracer™ ZN controller offers additional fan configuration
cooling modes can be configured using Rover™ service software.
Table 19. Tracer ZN520 fan configuration
Auto fan operation
Fan speed default
Heating
Cooling
Continuous
Off
Low
High
Off
Continuous
Low
High
The fan runs continuously at selected speeds, high or low. When the fan mode switch is in the auto
position or a hardwired fan mode input does not exist, the fan operates at the default configured
During unoccupied mode, the fan cycles between high speed and off with heating and cooling fan
modes. If the requested speed is off, the fan always remains off.
Table 20. Fan sequence of operation
Fan speed
Tracer™ ZN controller
Sequence of operation
Off
ZN010, ZN510, ZN520
• fan is off
• control valves and damper option are closed
• low air temperature detection open is still active
• fan operates continuously at selected speed
• 2-position control valve option cycle as needed
• 2-position control valve option opens to an adjustable mechanical stop-position
• fan operates continuously at selected speed
• modulating control valve option cycles as needed
• fan, 2-position damper cycle, and control valve cycle as needed
• in cooling mode, fan cycles from off to high
• in heating mode, fan cycles from off to low
Low or high (continuous fan) ZN010, ZN510
Low or high (continuous fan) ZN520
Auto (cycling)
ZN010, ZN510
• when heating/cooling is not required, the fan is off and the 2-position damper
option closes
Auto
ZN520
• fan cycles between high and medium, and never turns off unless the controller is
in unoccupied mode
• modulating or 2-position control open to maintain setpoint
During dehumidification, when the fan is in auto, the fan speed can switch depending on the error.
The fan speed increases as the space temperature rises above the active cooling setpoint.
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Additional flexibility built into the controller allows you to enable or disable the local fan switch
input. The fan mode request can be hardwired to any of the Tracer™ ZN controllers or
communicated to the Tracer ZN510 or ZN520 controller. When both inputs are present, the
Fan Speed Switch
Off. Fan is turned off, two-position damper option spring-returns closed.
High or Low. Fan runs continuously at the selected speed. The two-position damper option
opens to an adjustable mechanical stop-position.
Tracer ZN010 and ZN510
Off. Fan is off; control valves and fresh air damper option close. Low air temperature detection
option is still active.
Auto (Fan Cycling). Fan and fresh air damper cycle with control valve option to maintain
setpoint temperature. If the unit has a 2-speed fan, in cooling mode the fan cycles from off to high
and in heating mode it cycles from off to low (factory default that can be field-adjusted using
Rover™ service software). When no heating or cooling is required, the fan is off and the fresh air
damper option closes. Units with 2-speed fans can also be field-configured using Rover to run at
a defined speed when the fan speed switch is in the auto position.
Low or High (Continuous Fan). Fan operates continuously while control valve option cycles to
maintain setpoint temperature. Fresh air damper option is open.
Tracer ZN520
Off. Fan is off; control valve options and fresh air damper options close. The low air temperature
detection option is still active.
Auto. Fan speed control in the auto setting allows the modulating (three-wire floating point)
control valve option and single or two-speed fan to work cooperatively to meet precise capacity
requirements, while minimizing fan speed (motor/energy/acoustics) and valve position (pump
energy/chilledwater reset). As the capacity requirement increases at low fan speed, the water valve
opens. When the low fan speed capacity switch point is reached, the fan switches to high speed and
the water valve repositions to maintain an equivalent capacity. The reverse sequence takes place
with a decrease in required capacity.
Units with 2-speed fans on low or high. The fan will run continuously at the selected speed
and the valve option will cycle to meet setpoint.
Continuous Fan Operation
During occupied and occupied standby modes, the fan normally is on. For multiple speed fan
applications, the fan normally operates at the selected or default speed (off, high, or low). When
fan mode is auto, the fan operates at the default fan speed.
During unoccupied mode, the fan is off. While unoccupied, the controller will heat or cool to
maintain the unoccupied heating and cooling setpoints. In unoccupied mode, the fan runs on high
The unit fan is always off during occupied, occupied standby, and unoccupied modes when the unit
is off due to a diagnostic or when the unit is in the off mode due to the local zone sensor module,
a communicated request, or the default fan speed (off).
If both a zone sensor module and communicated request exist, the communicated request has
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Fan Cycling Operation
Tracer™ ZN520 does not support fan cycling in occupied mode. The fan cycles between high speed
and off in the unoccupied mode only. The controller’s cascade control algorithm requires
continuous fan operation in the occupied mode.
Fan Off Delay
When a heating output is controlled off, the Tracer™ ZN controller automatically holds the fan on
for an additional 30 seconds. This 30-second delay allows the fan to blow off any residual heat from
the heating source, such as a steam coil. When the unit is heating, the fan off delay is normally
applied to control the fan; otherwise, the fan off delay does not apply.
Fan Start on High Speed
On a transition from off to any other fan speed, the Tracer™ ZN controller automatically starts the
fan on high speed and runs the fan at high speed for 0.5 seconds. This provides ample torque
required to start all fan motors from the off position.
Fan Operation During Occupied Heating Modes
The ZN520 fan output(s) normally run continuously during the occupied and occupied standby
modes, but cycle between high and off speeds with heating/cooling during the unoccupied mode.
When in the occupied mode or occupied standby mode and the fan speed is set at the high or low
information on abnormal fan operation.
Table 21. Fan mode operation, Tracer ZN010 and ZN510
Heating mode
Unoccupied
Cooling mode
Unoccupied
Fan mode
Off
Occupied
Off
Occupied
Off
Off
Off
(a)
Low
Low
Off/high
Off/high
Off/high
Off/high
Low
Off/high
Off/high
Off/high
Off/high
High
High
High
Auto continuous
Cycling off
Notes:
Heat default
Off/heat default
Cool default
Off/cool default
1. During the transition from off to any fan speed but high, Tracer™ ZN010 and ZN510 automatically start the fan on high
speed and run for one-half of a second before transitioning to the selected speed (if it is other than high). This provides
enough torque to start all fan motors from the off position.
2. When the heating output is controlled off, ZN010 and ZN510 automatically control the fan on for an additional 30
seconds. This delay allows the fan to dissipate any residual heat from the heating source, such as electric heat.
(a) Whenever two states are listed for the fan, the first state (off) applies when there is not a call for heating or cooling. The
second state (varies) applies where there is a call for heating or cooling. The heat default is factory-configured for low fan
speed, and the cool default is high.
Table 22. Valid operating range and factor default setpoints, Tracer ZN010 and ZN510
Setpoint/parameter
Unoccupied cooling setpoint
Occupied cooling setpoint
Occupied heating setpoint
Unoccupied heating setpoint
Cooling setpoint high limit
Cooling setpoint low limit
Heating setpoint high limit
Heating setpoint low limit
Power up control wait
Default setting
85°F
Valid operating range
40°F–115°F
74°F
40°F–115°F
71°F
40°F–115°F
60°F
40°F–115°F
110°F
40°F
40°F–115°F
40°F–115°F
105°F
40°F
40°F–115°F
40°F–115°F
0 sec
0 sec–240 sec
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Table 23. Local fan switch enabled
Communicated
Fan switch (local)
Fan operation fan speed input
Off
Ignored
Ignored
Ignored
Off
Off
Low
High
Auto
Low
High
Off
Low
Low
High
High
Auto
Auto (configured default, determined by heat/cool mode)
Table 24. Fan operation in heating and cooling modes
Heating
Cooling
Unoccupied
Fan mode
Occupied
Off
Unoccupied
Off
Occupied
Off
Off
Off
Low
Low
Off/high
Off/high
Low
Off/high
Off/high
High
High
High
Auto (continuous)
Default fan speed Off/high
Default fan speed Off/high
Two- and Four-Pipe Changeover Operation
Tracer™ ZN controllers offer accurate and reliable unit changeover using 2-way valves and the
controller’s entering water temperature sampling function. Only units using the main hydronic coil
for both heating and cooling (2-pipe and 4-pipe changeover units) use the entering water
temperature sampling function.
Two-pipe and 4-pipe changeover applications require an entering water temperature sensor to
allow the main coil to be used for heating and cooling. This sensor is factory-provided and should
be field-installed on the entering water pipe.
The entering water temperature sampling function periodically opens the two-way valve to allow
temporary water flow, producing reliable entering water temperature measurement. To ensure
accurate unit changeover without sacrificing the benefits of 2-way, 2-position valves, Tracer™ ZN
controllers periodically test the entering water temperature on all hydronic main coil changeover
units. Hydronic heating/cooling changeover operation requires central plant operation, and the
unitcontrollermustuseanenteringwatertemperaturesensortoverifydeliveryofthecorrectwater
temperature from the central plant.
Entering Water Temperature Sampling Function
The entering water temperature (EWT) must be five degrees above the space temperature for
hydronic heating and five degrees below the space temperature for hydronic cooling. When water
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flows normally and frequently through the coil, the controller does not invoke the sampling
function because the EWT is satisfactory.
Table 25. Unit mode as related to water temperature
Unit type
EWT sensor required?
Coil water temperature
2-pipe changeover
Yes
• Can cool if: space temp - EWT ≥ 5°F
• Can heat if: EWT - space temp ≥ 5°F
• Can cool if: space temp - EWT ≥ 5°F
• Can heat if: EWT - space temp ≥ 5°F
Hot water assumed
4-pipe changeover
Yes
2-pipe heating only
2-pipe cooling only
4-pipe heat/cool
No
No
No
Cold water assumed
• Cold water assumed in main coil
• Hot water assumed in auxiliary coil
However, when the controller detects an incorrect water temperature based on heating or cooling
mode, it invokes the entering water temperature sampling function. For example, when the
measured EWT is too coolto heatortoo warm to cool. Forcooling theEWTneedsto be five degrees
below the measured space temperature. For heating, the EWT should be five degrees above the
measured space temperature.
After the controller invokes the function, the unit opens the main hydronic valve for no more than
three minutes before considering the measured EWT. The controller allows an initial stabilization
period, equal to 30 seconds plus 1/2 the valve stroke time, to flush the coil. Once the temperature
stabilization period expires, the controller compares the EWT against the effective space
temperature (either hardwired or communicated) to determine whether the EWT is correct for the
desired heating or cooling mode. If the EWT is not usable for the desired mode, the controller
continues to compare the EWT against the effective space temperature for a maximum of three
minutes.
The controller automatically disables the entering water temperature sampling and closes the
main hydronic valve when the measured EWT exceeds the high EWT limit (110°F). When the EWT
is warmer than 110°F, the controller assumes the EWT is hot because it is unlikely the coil would
drift to a high temperature unless the actual loop temperature was very high.
If the EWT is unusable—too cool to heat or too warm to cool—the controller closes the hydronic
valve and waits 60 minutes before initializing another sampling. If the controller determines the
EWT is valid for heating or cooling, it resumes normal heating/cooling control and effectively
disables entering water temperature sampling until it is required.
Electric Heat Operation
Tracer™ ZN controllers support 1-stage electric heat. Also, Tracer ZN520 supports 2-stage electric
heat. Tracer ZN520 cycles the electric heat to control the discharge air temperature. The rate of
cycling is dependent upon the load in the space and the temperature of the incoming fresh air from
the economizer (if any). Two-pipe changeover units with electric heat use the electric heat only
when hot water is not available.
Economizer Damper (Tracer ZN520 Only)
With a valid outdoor air temperature (either hardwired or communicated), Tracer™ ZN520 usesthe
modulating economizer damper as the highest priority cooling source. Economizer operation is
only possible using a modulating damper during the occupied, occupied standby, unoccupied, and
occupied bypass modes.
The controller initiates the economizer function if the fresh air temperature is cold enough for use
as free cooling capacity. If the fresh air temperature is less than the economizer enable setpoint
(absolute dry bulb), the controller modulates the fresh air damper (between the active minimum
damper position and 100%) to control the amount of fresh air cooling capacity. When the fresh air
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temperature rises 5°F above the economizer enable point, the controller disables economizing and
moves the fresh air damper back to its predetermined minimum position based on the current
occupancy mode or communicated minimum damper position.
Table 26. Relationship between outdoor temperature sensors and economizer damper position (Tracer ZN520 only)
Modulatingfreshairdamper
Outdoor air temperature
occupied or occupied bypass Occupied standby
Unoccupied
None or invalid
Open to occupied minimum
position
Open to occupied standby minimum Closed
position
Failed
Open to occupied minimum
position
Open to occupied standby
Closed
Present and economizer
feasible
Economizing: minimum position Economizing: between occupied
Open and economizing only when
to 100%
standby minimum position to 100% unit operating, closed otherwise
Present and economizer not
feasible
Open to occupied minimum
position
Open to occupied standby minimum Closed
position
Tracer Dehumidification (Tracer ZN520 Only)
Dehumidification is possible when mechanical cooling is available, the heating capacity is located
in the reheat position, and the space relative humidity setpoint is valid.The controller starts
dehumidifying the space when the space humidity exceeds the humidity setpoint. The controller
continues to dehumidify until the sensed humidity falls below the setpoint minus the relative
humidity offset. The controller uses the cooling and reheat capacities simultaneously to
dehumidify the space. While dehumidifying, the discharge air temperature is controlled to
maintain the space temperature at the current setpoint.
A typical scenario involves high humidity and high temperature load of the space. The controller
setsthecoolingcapacityto100%andusesthereheatcapacity towarmthedischargeairtomaintain
space temperature control. Dehumidification may be disabled via Tracer™ or configuration.
Note: If the unit is in the unoccupied mode, the dehumidification routine will not operate.
Data Sharing (Tracer ZN510 or ZN520 Only)
Because this controller utilizes LonWorks® technology, the controller can send or receive data
(setpoint, heat/cool mode, fan request, space temperature, etc.) to and from other controllers on
the communication link, with or without the existence of a building automation system. This
applies toapplications where multipleunit controllers shareasinglespacetemperaturesensor(for
rooms with multiple units but only one zone sensor) for both standalone (with communication
wiring between units) and building automation system applications. For this application you will
need to use the Rover™ service tool. For more information on setup, refer to the Trane publication
EMTX-IOP-2.
Binary Inputs
Tracer™ ZN controllers have the following binary inputs, factory-configured for the following
functions:
•
•
•
•
Binary input 1: low temperature detection (freezestat)
Binary input 2: condensate overflow
Binary input 3: occupancy/ generic
Binary input 4: fan status (Tracer ZN520 only)
Note: The generic binary input can be used with a Tracer Summit® building automation system
only.
BIP1: Low Temperature Detection Option
The factory hard wires the low temperature detection sensor to binary input #1 (BIP1) on the
Tracer™ ZN controller. The sensor defaults normally closed (N.C.), and will trip off the unit on a low
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temperature diagnostic when detecting low temperature. In addition, Tracer ZN controls unit
devices as listed below:
Fan: Off
Valves: Open
Electric heat: Off
Damper: Closed
Note: See the “Diagnostics” section for more information.
BIP2: Condensate Overflow Detection Option
The factory hard wires the condensate overflow sensor to binary input #2 (BIP2) on the Tracer™
ZN controller. The sensor defaults normally closed (N.C.), and will trip off the unit on a condensate
overflowdiagnosticifcondensate reachesthetrippoint. Inaddition, TracerZNcontrolsunitdevices
as listed below:
Fan: Off
Valves: Closed
Electric heat: Off
BIP3: Occupancy Sensor
Binary input #3 (BIP3) on Tracer™ ZN is available for field- wiring an occupancy sensor, such as a
binary switch or a timeclock, to detect occupancy. The sensor can be either normally open or
BIP4: Fan Status (ZN520 Only)
Binary input #4 (BIP4) on Tracer™ ZN is available for sensor, such as a binary switch or a timeclock,
to detect occupancy. The sensor defaults normally open but can be configured as either normally
open or closed.
Table 27. Binary input configurations
Controller operation
Binary input
BI 1
Description
Configuration
Contact closed
Normal
Contact open
(a)
(b)
Low temperature detection
NC
NC
NO
NO
NO
Diagnostic
BI 2
Condensate overflow
Normal
Diagnostic
BI 3
Occupancy
Unoccupied
Occupied
(c)
BI 3
Generic binary input
Normal
Normal
BI 4
Fan status
Normal
Diagnostic
Notes:
1. The occupancy binary input is for standalone unit controllers as an occupied/unoccupied input. However, when the
controller receives a communicated occupied/unoccupied request, the communicated request has priority over the
hardwired input.
2. If the fan mode input is in the off position or the controller is in the unoccupied mode with the fan off, the fan status input
will be open. A diagnostic will not be generated when the controller commands the fan off. A diagnostic will only be
generated if the fan status input does not close after one minute from energizing a fan output or any time the input is
open for one minute. The controller waits up to one minute after energizing a fan output to allow the differential pressure
to build up across the fan.
(a) During low temperature, condensate overflow, and fan status diagnostics, the Tracer™ ZN520 control disables all normal
unit operation of the fan, valves, and damper.
(b)The table below shows the controller’s response to low temperature detection, condensate overflow, and fan status diag-
nostics.
(c) The generic binary input does not affect unit operation. A building automation system reads this input as a generic binary
input.
Description
BIP
BI 1
BI 2
BI 4
Fan
Off
Valve
Open
Electric heat
Damper
Closed
Low temperature detection
Condensate overflow
Fan status
Off
Off
Off
Off
Closed
Closed
Closed
Off
Closed
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Analog Inputs
Table 28. Analog inputs
Analog input
Zone
Terminal
TB3-1
Function
Range
ZN010
ZN510
ZN520
Space temperature input
Analog ground
5° to 122°F (-15° to 50°C)
N/A
•
•
•
•
•
•
•
•
•
•
•
•
Ground
Set
TB3-2
TB3-3
Setpoint input
40° to 115°F (4.4° to 46.1°C)
4821 to 4919 W (Off)
2297 to 2342 W (Auto)
10593 to 10807 W (Low)
15137 to 16463 W (High)
N/A
Fan
TB3-4
Fan switch input
Ground
TB3-6
J3-1
J3-2
J3-3
J3-4
J3-6
Analog ground
•
•
•
•
•
•
Analog Input 1
Entering water temperature
Analog ground
-40° to 212°F (-40° to 100°C)
N/A
Analog Input 2
Analog Input 3
Analog Input 4
Discharge air temperature
Analog ground
-40° to 212°F (-40° to 100°C)
N/A
•
•
•
•
•
Fresh air temp/generic temp
Analog ground
-40° to 212°F (-40° to 100°C)
N/A
J3-7
Universal Input
Generic 4-20 ma
Humidity
0 – 100%
0 – 100%
0 – 2000ppm
CO2
Ground
Ground
Notes:
J3-8
J3-9
Analog ground
N/A
N/A
•
•
Analog ground
1. The zone sensor, entering water temperature sensor, discharge air sensor, and the outside air temperature sensor are 10KW thermistors.
2. Zone sensor: Wall mounted sensors include a thermistor soldered to the sensor’s circuit board.
3. Changeover units include an entering water temperature sensor.
Binary Outputs
Binary outputs are configured to support the following:
•
•
•
•
•
•
•
•
Two fan stages (when one or two fan stages are present, J1-2 can be configured as exhaust fan)
One hydronic cooling stage
One hydronic heating stage (dehumidification requires this to be in the reheat position)
One DX cooling stage
One or two-stage electric heat (dehumidification requires this to be in the reheat position)
Face and bypass damper
Modulating fresh air damper (Tracer™ ZN520 only)
One-stage baseboard heat
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Table 29. Binary output configuration
Binary output
pin connection Configuration
ZN010
ZN510
ZN520
J1-1
J1-2
J1-3
J1-4
Fan high
•
•
•
•
•
•
•
•
N/A
Fan low
(Key)
Fan low
•
•
•
•
•
•
(a)
J1-5
J1-6
Main valve – open, or 2 pos. valve
Aux. valve/elec. ht.
•
•
Aux. valve – close
J1-7
2-pos. damper
•
•
J1-9
Heat valve – open, or 2 pos. valve, or first stage elec. ht.
•
•
•
•
•
•
J1-10
J1-11
J1-12
TB4-1
TB4-2
Notes:
Heat valve – close or sec. stage elec. ht.
Fresh air damper – open
Fresh air damper – close
Generic / baseboard heat output
24 VAC
1. If no valves are ordered with the unit, the factory default for Tracer™ ZN010 and ZN510 controllers are: main valve
configured as normally closed and aux. valve configured as normally open.
2. If the fresh air damper option is not ordered on the unit, 2-pos. damper is configured as none.
3. Pin J1-2 can be configured for an exhaust fan with the use of Rover™ software. Factory default is none.
(a) Two-pipe hydronic heat/cool changeover units use terminals J1-5 and J1-6 to control the primary valve for both heating and
cooling. Units configured and applied as 2-pipe hydronic heat/cool changeover with electric heat, use terminals J1-5 and
J1-6 to control the primary valve (for both cooling and heating), and terminals J1-9 and J1-10 for the electric heat stage.
For those 2-pipe changeover units, electric heat will not energize while the hydronic supply is hot (5 or more degrees
above the space temperature). In a 4-pipe application, pin J1-5 is for cooling and pin J1-6 for heating.
Zone Sensor
The Tracer™ ZN controller accepts the following zone sensor module inputs:
•
•
•
•
•
Space temperature measurement (10kW thermistor)
Local setpoint (either internal or external on the zone sensor module)
Fan mode switch
Timed override, using “on” and “cancel” buttons (Tracer ZN510 and ZN520 only)
Communication jack (Tracer ZN510 and ZN520 only)
Table 30. Zone sensor wiring connections
TB1
Description
Space temperature
Common
1
2
3
4
5
6
Setpoint
Fan mode
Communications
Communications
Space Temperature Measurement
Zone sensors use a 10kW thermistor to measure the space temperature. Wall-mounted zone
sensors include a space temperature thermistor. Unit-mounted zone sensors have a return air
sensor mounted in the unit’s return airstream. If both a hardwired and communicated space
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temperature value exists, the controller ignores the hardwired space temperature input and uses
the communicated value.
Local Setpoint
The zone sensor may be equipped with a thumbwheel for setpoint adjustment.
Fan Mode Switch
The zone sensor may be equipped with a fan mode switch. The fan mode switch offers selections
of off, low, high, or auto.
External Setpoint Adjustment
Zone sensors with an external setpoint adjustment (1kW) provide the Tracer™ ZN controller with
a local setpoint (50 to 85°F or 10 to 29.4°C). The external setpoint is exposed on the zone sensor’s
front cover.
When the hardwired setpoint adjustment is used to determine the setpoints, all unit setpoints are
calculated based on the hardwired setpoint value, the configured setpoints, and the active mode
of the controller. The hardwired setpoint is used with the controller’s occupancy mode (occupied,
occupied standby, or unoccupied), the heating or coolingmode, the temperature deadband values,
and the heating and cooling setpoints (high and low limits) to determine the controller’s active
setpoint.
When a building automation system or other controller communicates a setpoint to the controller,
the controller ignores the hardwired setpoint input and uses the communicated value. The
exception is the unoccupied mode, when the controller always uses the stored default unoccupied
setpoints. After the controller completes all setpoint calculations, based on the requested setpoint,
the occupancy mode, the heating and cooling mode, and other factors, the calculated setpoint is
validated against the following setpoint limits:
•
•
•
•
Heating setpoint high limit
Heating setpoint low limit
Cooling setpoint high limit
Cooling setpoint low limit
Note: Only units with ZN510 or ZN520 can receive a communicated setpoint from Tracer™ or
other building automation system. However, Rover™ service software can communicate
with all Tracer ZN controllers.
These setpoint limits only apply to the occupied and occupied standby heating and cooling
setpoints. These setpoint limits do not apply to the unoccupied heating and cooling setpoints
stored in the controller’s configuration.
When the controller is in unoccupied mode, it always uses the stored unoccupied heating and
cooling setpoints.The unit can also be configured to enable or disable the local (hardwired)
setpoint. This parameter provides additional flexibility to allow you to apply communicated,
hardwired, or default setpoints without making physical changes to the unit.
Similar to hardwired setpoints, the effective setpoint value for a communicated setpoint is
determined based on the stored default setpoints (which determines the occupied and occupied
standby temperature deadbands) and the controller’s occupancy mode.
Fan Switch
The zone sensor fan switch provides the controller with an occupied (and occupied standby) fan
request signal (Off, Low, High, Auto). If the fan control request is communicated to the controller,
the controller ignores the hardwired fan switch input and uses the communicated value. The zone
sensor fanswitch inputcanbe enabledordisabledthrough configurationusingtheRover™service
tool. If the zone sensor switch is disabled, the controller resorts to its stored configuration default
fan speeds for heating and cooling, unless the controller receives a communicated fan input.
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When the fan switch is in the off position, the controller does not control any unit capacity. The unit
remainspoweredandalloutputsdrivetotheclosedposition. Uponalossofsignalonthefanspeed
input, the controller reports a diagnostic and reverts to using the default fan speed.
On/Cancel Buttons
Momentarily pressing the on button during unoccupied mode places the controller in occupied
bypass mode for 120 minutes. You can adjust the number of minutes in the unit controller
configuration using Rover™ service tool. The controller remains in occupied bypass mode until the
override time expires or until you press the Cancel button.
Communication Jack
Use the RJ-11 communication as the connection point from Rover™ service tool to the
communication link—when the communication jack is wired to the communication link at the
controller. By accessing the communication jack via Rover, you gain access to any controller on the
link.
Figure 14. Resistance temperature curve for the zone sensor, entering water temperature sensor,
and discharge air sensor
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Maintenance
Maintenance Procedures
Perform the following maintenance procedures to ensure proper unit operation.
Air Filters
Always install filters with directional arrows pointing toward the fan.
Fan Bearings
Fan bearings are permanently sealed and lubricated and do not require additional lubrication.
Fan Motors
Inspect fan motors periodically for excessive vibration or temperature. Operating conditions will
vary the frequency of inspection and lubrication. Motor lubrication instructions are on the motor
tag or nameplate. If for some reason these instructions are not available, contact the motor
manufacturer. Some motor manufacturers may not provide oil tubes on motors with permanently
sealed bearings.
ƽ WARNING
Hazardous Voltage!
Disconnect all electric power, including remote disconnects before servicing. Follow proper
lockout/tagout procedures to ensure the power can not be inadvertently energized. Failure to
disconnect power before servicing could result in death or serious injury.
Before lubricating the motor:
1. Turn the motor off and disconnect power to the unit to ensure the motor doesn’t accidentally
start.
2. Use a No. 10 SAE, non-detergent automotive type oil. Do not over-oil.
Sheave Alignment
To prevent interference of the fan frame with the belt, make sure that the belt edge closes to the
Align the fan and motor sheaves by using a straight–edge or taut string, as shown in Figure 16,
p. 64. The straight-edge must be long enough to span the distance between the sheave outside
edges.
When the sheaves are aligned, the straight–edge will touch both sheaves at points A through D,
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Maintenance
sheaves and pull tight. Adjust sheaves and tighten the sheave set screws to the correct torques
Figure 15. Clearance recommendation to
prevent fan frame and belt interface
Figure 16. Correct sheave alignment
Table 31. Recommended torques for tightening sheaves and bearing thrust collar
Torque (in.-lb)
Ft-lb
12
N-m
16.3
7.5
Sheave setscrew
Bearing thrust collar
Fan wheel screw
144
66
5.5
12
144
16.3
Fan Assembly Set Screws
Check and adjust fan wheel, bearing, and sheave set screws whenever a component is removed
Fan Belt Tension
Proper belt tension is necessary to endure maximum bearing and drive component life and is
based on fan brake horsepower requirements. Replace belt when frayed or worn.
Fan belt tension should only be tight enough so the belt does not slip and maintains adequate
airflow.
Note: Check fan belt tension at least twice during the first days of new belt operation since there
is a rapid decrease in tension until belts are run-in.
Be careful not to over-tension fan belt. Excessive tension will reduce fan and motor bearing life,
accelerate belt wear and possibly cause shaft failure. Clean the sheaves and belt with a dry cloth.
Keep oil and grease away from the belt because they may cause belt deterioration and slippage.
Trane does not recommend belt dressing.
64
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Maintenance
NOTICE
Belt tension!
Do not over-tension belts. Excessive belt tension will reduce fan and motor bearing life,
accelerate belt wear, and could result in shaft failure.
Table 32. BCHC/BCVC fan, filter, and mixing box general data
Unit size
12
18
24
36
54
72
90
Nominal cfm
400
600
800
1200
1800
2400
3000
Air flow
Minimum cfm
Maximum cfm
Fan data
250
500
375
675
500
750
1125
2400
1500
3000
1875
4000
1000
1600
Fan wheel, in. (dia. x width)
Maximum rpm
Motor hp
9.5 x 4.5 9.5 x 4.5
9.5 x 9.5
1800
9.5 x 9.5 12.6 x 9.5 12.6 x 9.5 12.6 x 9.5
2300
2300
1800
1500
1500
1500
0.33–1.0
0.33–1.0
0.33–1.0
0.33–1.5
0.33–2.0
0.33–3.0
0.33–3.0
Unit flat filter
Qty. - size, in.
1 - 12 x 24 1 - 12 x 24 1 - 16 x 25 2 - 16 x 20 2 - 20 x 20 1 - 20 x 20 3 - 16 x 25
1 - 20 x 25
Area, sq. ft
2.000
200
2.000
300
2.778
288
4.444
270
5.556
324
6.250
384
8.333
360
Velocity, ft/min.
Angle filter
Qty. - size, in.
Area, sq. ft
2 - 12 x 24 2 - 12 x 24 2 - 12 x 24 2 - 20 x 20 4 - 16 x 20 4 - 16 x 20 4 - 20 x 20
4.000
100
4.000
150
4.000
200
5.556
216
8.889
203
8.889
270
11.111
270
Velocity, ft/min.
Bottom / top access filter box
Qty. - size, in.
1 - 12 x 20 1 - 12 x 24 1 - 16 x 25 1 - 16 x 20 1 - 16 x 20 1 - 20 x 25 2 - 16 x 25
1 - 16 x 16 1 - 20 x 20 1 - 20 x 20 1 - 14 x 25
Area, sq. ft
1.700
240
2.000
300
2.800
288
4.000
300
5.000
360
6.300
384
8.000
375
Velocity, ft/min.
Mixing box
Damper opening width, in.
Damper opening height, in.
Area, sq. ft
15.5
7
19.5
7
19.5
7
31.5
7
31.5
12.75
2.789
645
31.5
12.75
2.789
861
31.5
12.75
2.789
1076
0.753
531
0.948
633
0.948
844
1.531
784
Velocity, ft/min.
Note: Minimum air flow limits apply to units with hot water or electric heat only. There is no minimum airflow limit on cooling
on units. Maximum airflow limits are to help prevent moisture carryover.
Table 33. BCBH/BCVC valve package waterflow limits
Tube size (in.)
gpm
8.6
1/2
3/4
1
19.3
34.3
53.5
1-1/4
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Maintenance
Table 34. BCHC/BCVC coil general data
Unit size
12
18
24
36
54
72
90
Nominal cfm
400
600
800
1200
1800
2400
3000
Hydronic & DX coil data
2
Area - ft
0.89
8
1.11
8
1.67
12
2.67
12
4.00
18
5.00
18
6.67
24
(a),(b)
Width - in.
(c)
Length - in.
16
20
20
32
32
40
40
Velocity - ft/min.
450
540
480
450
450
480
450
Hydronic coil data
• High-capacity
2
Area - ft
0.89
8
1.11
8
1.67
12
2.67
12
3.89
17.5
32
4.86
17.5
40
6.25
22.5
40
(a),(d)
Width - in.
Length - in.
16
20
20
32
Velocity - ft/min.
450
540
480
450
463
494
480
1-row coil
(e)
Minimum gpm
1.0
5.2
4.4
5.1
19.4
1.0
5.2
5.2
6.0
22.2
1.0
5.2
6.6
7.8
33.2
1.0
6.1
6.1
7.9
(f)
Maximum gpm
5.2
32.6
17.6
22.4
132.9
32.6
20.4
26.0
155.1
42.0
25.8
32.9
196.6
Dry coil weight - lb
Wet coil weight - lb
9.3
11.0
47.1
3
Internal volume - in
2-row coil
• High-capacity
Minimum gpm
1.0
5.2
5.9
7.2
36.0
1.0
5.2
7.0
8.4
38.8
2.0
2.0
6.1
6.1
7.9
Maximum gpm
10.4
9.9
10.4
14.1
17.6
96.9
32.6
27.2
36.1
246.5
32.6
32.1
42.5
288.0
42.0
39.4
52.6
365.5
Dry coil weight - lb
Wet coil weight - lb (kg)
12.3
66.5
3
Internal volume - in
4-row coil
• Standard capacity
Minimum gpm
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
8.8
8.8
11.7
62.6
58.5
77.0
512.3
Maximum gpm
47.0
37.2
48.3
307.4
47.0
44.5
57.7
365.5
(g)
Dry coil weight - lb
Wet coil weight - lb
Internal volume - in
• High-capacity
Minimum gpm
2.0
2.0
10.4
2.9
2.9
6.1
6.1
7.9
Maximum gpm
10.4
10.5
13.1
15.7
17.7
22.5
132.9
15.7
25.5
32.5
193.8
32.6
47.0
62.7
433.0
32.6
56.3
74.9
516.7
42.0
73.1
97.9
688.3
Dry coil weight - lb
Wet coil weight - lb
12.4
15.5
3
Internal volume - in
72.0 85.8
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Maintenance
Table 34. BCHC/BCVC coil general data (continued)
Unit size
12
18
24
36
54
72
90
Nominal cfm
6-row coil
400
600
800
1200
1800
2400
3000
• Standard capacity
Minimum gpm
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
8.8
8.8
11.7
Maximum gpm
47.0
52.4
68.1
434.8
47.0
63.1
82.0
523.4
62.6
Dry coil weight - lb
82.7
Wet coil weight - lb
108.7
720.0
Internal volume - in
• High-capacity
Minimum gpm
2.0
2.0
2.9
2.9
6.1
6.1
7.9
Maximum gpm
10.4
14.6
18.2
99.7
10.4
17.4
21.8
121.8
15.7
24.7
31.5
188.3
15.7
36.1
46.1
276.9
32.6
65.4
87.8
620.4
32.6
78.6
105.6
745.9
42.0
Dry coil weight - lb
Wet coil weight - lb
Internal volume - in
• Steam coil data
101.5
137.0
983.1
3
2
Area - ft
0.71
6
0.88
6
1.75
12
2.75
12
4.13
18
5.13
18
6.83
24
Width - in.
Length - in.
17
26
3
21
21
33
33
41
41
Velocity - ft/min.
25
18
17
17
16
16
1-row coil
3
5
5
14
14
9
Minimum steam press - psig 2.0
Maximum steam press - psig 15.0
2.0
15.0
18.7
20.4
47.7
2.0
15.0
32.5
36.0
95.3
2.0
2.0
2.0
2.0
15.0
41.1
45.8
130.8
15.0
57.4
64.5
196.1
15.0
64.8
73.2
231.6
15.0
84.9
96.1
308.7
Dry coil weight - lb
Wet coil weight - lb
Internal volume - in
16.7
18.2
41.7
3
(a) Coil width = Length in the direction of a coil header, typically vertical.
(b)“Hydronic and DX coil data” width dimensions apply only to DX coils (all unit sizes), 1-row standard ca-
pacity hydronic coils (unit sizes 012 through 036), and 4- and 6-row standard capacity hydronic coils (54
through 90).
(c) Coil length = Length of coil in direction of the coil tubes, typically horizontal and perpendicular to airflow.
(d)“High-capacity hydronic coil data” width dimensions apply only to 1-row standard capacity hydronic coils
(unit sizes 054 through 090) and 2-, 4-, and 6-row high capacity hydronic coils (all unit sizes).
(e) The minimum waterflow at 1.5 fps tubeside velocity is to ensure the coil self-vents properly. There is no
minimum waterflow limit for coils that do not require self venting.
(f) Maximum gpm limits are to prevent erosion and noise problems.
(g)DX coil height and width dimensions are same as comparable hydronic coils. Four- and six-row DX coil dry
weight dimensions are same as comparable 4- and 6-row hydronic coils. A 3-row DX coil dry weight is 25%
less than a comparable 4-row hydronic coil. Internal volumes are approximately 6% less than comparable
hydronic coils.
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Maintenance
Table 35. Drive data
Fan rpm range
Motor speed
Motor sheave
Browning Trane
Fan sheave
Browning Trane
Belt
Browning
Unit Motor
1750
1450 Drive
size
watts
HP
Trane
(60 Hz) (50 Hz) letter
12, 18 186–1119 1/3 to 1-1/2 1VL40x5/8 X10090082090 AK74x3/4 X10070173270
A41
A39
A37
A36
A35
A34
A34
A53
A48
A46
A45
A43
A41
A39
A38
A37
A36
A48
A46
A45
A43
A41
A40
A53
A50
A48
A46
A45
A43
A41
A40
A40
A51
A49
A48
A46
A45
A43
A59
A56
A53
A53
A50
A49
A48
A46
A46
A56
A56
A53
A53
A50
A49
X10200254160 619–878
X10200254140 727–109
513–727
602–853
D
E
F
G
H
J
K
A
B
C
D
E
F
G
H
J
K
L
M
N
P
R
T
A
B
C
D
E
F
AK64x3/4 X10070173030
AK54x3/4 X10070172C40
AK46x3/4 X10070172A20
AK39x3/4 X10070172700
AK34x3/4 X10070172640
AK28x3/4 X10070172440
X10200254120 879–1245 728–1031
X10200254110 1000–1417 829–1174
X10200254100 1200–1700 994–1409
X10200254090 1313–1859 1088–1541
X10200254090 1615–2288 1338–1896
X10200254280 390–552
X10200254230 478–678
X10200254210 540–765
X10200254200 619–878
X10200254180 727–1029 602–853
X10200254160 879–1245 728–1031
X10200254140 1000–1417 829–1174
X10200254130 1200–1700 994–1409
X10200254120 1313–1859 1088–1541
X10200254110 1615–2288 1338–1896
X10200254230 678–877
X10200254210 765–990
X10200254200 878–1136 727–941
X10200254180 1029–1332 853–1104
X10200254160 1245–1611 1031–1335
X10200254150 1174–1519
X10200254280 390–552
X10200254250 478–678
X10200254230 540–765
X10200254210 619–878
X10200254200 727–1029 602–853
X10200254180 879–1245 728–1031
X10200254160 1000–1417 829–1174
X10200254150 1200–1700 994–1409
X10200254150 1313–1859 1088–1541
X10200254260 678–877
X10200254240 765–990
X10200254230 878–1136 727–941
X10200254210 1029–1332 853–1104
X10200254200 1245–1611 1031–1335
X10200254180 1174–1519
X10200254340 390–552
X10200254310 478–678
X10200254280 540–765
X10200254280 619–878
X10200254250 727–1029 602–853
X10200254240 879–1245 728–1031
X10200254230 1000–1417 829–1174
X10200254210 1200–1700 994–1409
X10200254210 1313–1859 1088–1541
24, 36 186–1119 1/3 to 1-1/2 1VL40x5/8 X10090082090 AK114x3/4 X10070173A30
AK94x3/4 X10070173630
323–457
396–562
447–634
513–727
AK84x3/4 X10070173450
AK74x3/4 X10070173270
AK64x3/4 X10070173030
AK54x3/4 X10070172C40
AK46x3/4 X10070172A20
AK39x3/4 X10070172700
AK34x3/4 X10070172640
AK28x3/4 X10070172440
1492–2238 2 and 3(a)
3(a)
1VM50x5/8 X10090082170 AK94x3/4 X10070173630
1VM50x7/8 X10090082190 AK84x3/4 X10070173450
AK74x3/4 X10070173270
562–727
634–820
AK64x3/4 X10070173030
AK54x3/4 X10070172C40
AK46x3/4 X10070172A20
54, 72 186–1119 1/3 to 1-1/2 1VL40x5/8 X10090082090 AK114x3/4 X10070173A30
AK94x3/4 X10070173630
323–457
396–562
447–634
513–727
AK84x3/4 X10070173450
AK74x3/4 X10070173270
AK64x3/4 X10070173030
AK54x3/4 X10070172C40
AK46x3/4 X10070172A20
AK39x3/4 X10070172700
AK34x3/4 X10070172640
G
H
J
562–727
634–820
L
3(a)
1VM50x7/8 X10090082190 AK84x3/4 X10070173450
AK74x3/4 X10070173270
M
N
P
AK64x3/4 X10070173030
AK54x3/4 X10070172C40
AK46x3/4 X10070172A20
R
T
A
B
C
D
E
F
90
186–1119 1/3 to 1 1/2 1VL40x5/8 X10090082090 AK114x3/4 X10070173A30
AK94x3/4 X10070173630
323–457
396–562
447–634
513–727
AK84x3/4 X10070173450
AK74x3/4 X10070173270
AK64x3/4 X10070173030
AK54x3/4 X10070172C40
AK46x3/4 X10070172A20
AK39x3/4 X10070172700
AK34x3/4 X10070172640
G
H
J
X10200254310 678–877
X10200254310 765–990
X10200254280 878–1136 727–941
X10200254280 1029–1332 853–1104
X10200254250 1245–1611 1031–1335
X10200254240 1174–1519
562–727
634–820
L
3(a)
1VM50 X 7/8 X10090082190 AK84x3/4 X10070173450
AK74x3/4 X10070173270
M
N
P
R
T
AK64x3/4 X10070173030
AK54x3/4 X10070172C40
AK46x3/4 X10070172A20
(a) 2 hp 60 Hz motors have 5/8” bore sheaves. 2 hp 50 Hz motors have 7/8” bore sheaves. All 3 hp motors have 7/8” bore sheaves with the exception of
575V, which has the 5/8” bore.
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Maintenance
Coil Maintenance
Keep coils clean to maintain maximum performance. For operation at its highest efficiency, clean
the coil often during periods of high demand or when dirty conditions prevail. Clean the coil a
minimum of once per year to prevent dirt buildup in the coil fins, where it may not be visible.
Remove large debris from the coils and straighten fins before cleaning. Remove filters before
cleaning. Rinse coils thoroughly after cleaning. Clean the coil fins using one of these methods:
•
steam with detergent
•
•
hot water spray and detergent
commercially available chemical coil cleaner
NOTICE
Potential unit damage from coil cleaners!
Do not use acidic chemical coil cleaners. Also, do not use alkaline chemical coil cleaners with a
pH value greater then 8.5 (after mixing) without using an aluminum corrosion inhibitor in the
cleaning solution. Using these types of cleaners could result in equipment damage.
Inspecting and Cleaning Coils
Coils become externally fouled as a result of normal operation. Dirt on the coil surface reduces its
ability to transfer heat and can cause comfort problems, increased airflow resistance and thus
increased operating energy costs. If the coil surface dirt becomes wet, which commonly occurs
with cooling coils, microbial growth (mold) may result, causing unpleasant odors and serious
health-related indoor air quality problems.
Inspect coils at least every six months or more frequently as dictated by operating experience.
Cleaning frequently is dependent upon system operating hours, filter maintenance, and efficiency
and dirt load. Follow is the suggested method below:
Steam, Hot Water, and Cooling Coil Cleaning Procedure
1. Don the appropriate personal protective equipment (PPE).
2. Gain access to both sides of the coil section.
3. Use a soft brush to remove loose debris from both sides of the coil.
4. Use a steam cleaning machine, starting from the top of the coil and working downward. Clean
the leaving air side of the coil first, then the entering air side.
Use a block-off to prevent steam from blowing through the coil and into a dry section of the unit.
cleaning process.
6. Allow the unit to dry thoroughly before putting the system back into service.
7. Straighten any coil fins that may be damaged with a fin rake.
8. Replace all panels and parts and restore electrical power to the unit.
9. Ensure that contaminated material doesnot contact other areas of the unit or building. Properly
dispose of all contaminated materials and cleaning solutions.
ƽ WARNING
Hazardous chemicals!
Coil cleaning agents can be either acidic or highly alkaline. Handle chemical carefully. Proper
handling should include goggles or face shield, chemical resistant gloves, boots, apron or suit as
required. For personal safety refer to the cleaning agent manufacturer’s Materials Safety Data
Sheet and follow all recommended safe handling practices. Failure to follow all safety
instructions could result in death or serious injury.
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Maintenance
Winterizing the Coil
Make provisions to drain coils that are not in use, especially when subjected to freezing
temperatures.
To drain the coil, first blow out the coil with compressed air. Next, fill and drain the tubes with full-
strength ethylene glycol several times. Then drain the coil as completely as possible.
NOTICE
Potential coil-freeze condition!
Make provisions to drain the coil when not in use to prevent coil freeze-up. Failure to follow this
procedure could result in equipment damage.
Periodic Maintenance Checklists
Monthly Checklist
Thefollowing check list providesthe recommended maintenance schedule tokeeptheunit running
efficiently.
ƽ WARNING
Hazardous Voltage!
Disconnect all electric power, including remote disconnects before servicing. Follow proper
lockout/tagout procedures to ensure the power can not be inadvertently energized. Failure to
disconnect power before servicing could result in death or serious injury.
ƽ WARNING
Rotating parts!
Secure drive sheaves to ensure motor cannot freewheel. Failure to follow this procedure could
result in death, personal injury or equipment damage.
1. Inspect unit air filters. Clean or replace if airflow is blocked or if filters are dirty.
2. Check the condition and tension of fan belts. Adjust tension if belts are floppy or squeal
continually. Replace worn or fraying belts in matched sets.
Note: Check and adjustbelttensionatleast twice daily the first days of new belt operation. Belt
tension will rapidly decrease until the belts are run in.
3. Re-lubricate motor bearings, if motor is fitted with oil tubes and operating conditions include
moist or dirty air, continuous duty and/or high temperatures.
Semi-Annual Maintenance
1. Verify the fan motor is properly lubricated. Follow lubrication recommendations on the motor
tag or nameplate. Contact the motor manufacturer for more information.
2. With power disconnected, manually rotate the fan wheel to check for obstructions in the
housing or interference with fan blades. Remove any obstructions and debris.
3. Check the fan assembly sheave alignment. Tighten set screws to their proper torques.
4. Check fan belt tension. Adjust if belt is slipping. Replace if belt is worn or frayed.
5. Inspect the coils for dirt build-up. Clean fins if airflow is clogged.
Annual Maintenance
Check and tighten all set screws, bolts, locking collars and sheaves.
1. Inspect, clean, and tighten all electrical connections and wiring.
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Maintenance
2. Visually inspect the entire unit casing for chips or corrosion. Remove rust or corrosion and
repaint surfaces.
3. Clean fan wheels and fan shaft. Remove any rust from the fan shaft with an emery cloth and
recoat with L.P.S. 3 or equivalent.
4. Inspect the drainpan for sludge or other foreign material. Clear the drain openings and drain
line to ensure adequate flow.
5. Rotate the fan wheel and check for obstructions in the fan housing. The wheel should not rub
on the fan housing or cutoff. Adjust to center if necessary and tighten the wheel set screws per
6. Examine flex connector for cracks or leaks.
7. Repair or replace any damaged duct material.
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Diagnostics
Troubleshooting
LED Activity
Red Service LED
The red LED normally indicates if the unit controller is operating properly or not. Refer to Table 36.
Table 36. Red service LED activity‘
LED activity
Description
Off continuously after power is applied to the controller. Normal operation
On continuously, even when power is first applied to the Someone is pressing the Service button or the controller
controller.
has failed.
LED flashes about once every second.
Uninstall (normal controller mode). Use Rover™ service
tool to restore normal unit operation.
Black Service push button.
Use the Service button to install the Tracer™ ZN520
controller in a communication network.
Green Status LED
The green LED normally indicates whether the controller is powered on (24 VAC supplied). Refer
Table 37. Green status LED activity
Green LED activity
On continuously
Description
Power on (normal operation).
The controller is in manual output test mode.
No diagnostics present.
Blinks (one blink)
The controller is in manual output test mode.
One or more diagnostics are present.
Blinks (two blinks)
(a)
LED blinks (1/4 second on, 1/4 second, off for 10 seconds)
LED off
Wink mode.
Power is off.
Controller failure.
Test button is pressed.
(a) The Wink feature allows you to identify a controller. By sending a request from Rover™ service tool, you can request the
controller to wink (blink on and off as a notification that the controller received the signal). The green LED blinks (1/4
second on, 1/4 second off for 10 seconds) during Wink mode.
Yellow Comm LED
The yellow comm LED blinks at the rate the controller receives communication. The yellow LED
Table 38. Yellow comm LED activity
LED activity
Description
Off continuously
The controller is not detecting any communication.
(Normal for standalone applications.)
LED blinks or flickers
LED on continuously
The controller detects communication.
(Normal for communicating applications, including data sharing.)
Abnormal condition or extremely high traffic on the link.
High traffic on the link.
Note: If the service push button is held down for more than 15 seconds, the Tracer™ ZN controller
will uninstall itself from the ICS communication network and shut down all unit operation.
This mode is indicated by the red Service LED flashing once every second. See the Red
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Diagnostics
Service LED section. Use Rover™ service tool to restore the unit to normal operation. Refer
to the Rover product literature for more information.
Manual Output Test
The purpose of the manual output test sequence is to verify output and end device operation. Use
the manual output test to:
•
•
Verify output wiring and operation without using Rover™, service tool.
Force the water valve to open and balance the hydronic system.
Note: The manual output test is not an automatic cycle. You must press the Test button to proceed
through each step.
The controller observes all diagnostics that occur during the test sequence. Although an automatic
diagnostic reset sequence exists as part of the controller’s normal operation, the automatic
diagnostic reset feature is not active during the test sequence.
If left in an individual test step, the controller remains in test mode for 60 minutes and then exits
to normal operation.
Many service calls are due to unit diagnostics. The test sequence resets unit diagnostics and
attemptstorestorenormalunitoperationpriorto testingtheoutputs. Ifthediagnosticsremainafter
a reset, the STATUS LED indicates the diagnostic condition is still present (two blinks).
Manual Output Test Procedure
Follow the procedure below to test the Tracer™ ZN010, ZN510, or ZN520 controller.
1. Press and hold the Test button for at least two seconds (not exceeding five seconds), and then
release, to start the test mode.
2. The test sequence will turn off all outputs and then attempt to clear all diagnostics.
3. Press the Test button several more times (no more than once per second) to advance through
the test sequence.
The outputs are not subject to minimum times during the test sequence. However, the test
sequence only permits one step per second which limits minimum output time.
The green LED is turned off when the Test button is pressed. To begin the manual output test mode,
press and hold the Test button (turning off the green LED) for at least two seconds. The green LED
will begin to blink, indicating the controller is in test mode.
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Diagnostics
Table 39. Tracer ZN010 and ZN510 test sequence for 1-heat/1-cool configurations
(a)
Fan
Cool output
Heat output
Damper
J1-
Steps
J1-1, J1-3
Off
J1-
Off
Off
Off
Off
On
J1-
Off
Off
Off
Off
Off
On
Off
1. Off
Closed
Closed
Closed
Closed
Closed
Closed
Open
2. Fan high
3. Exhaust fan
4. Fan
High
(b)
Low
High
High
5. Cool
6. Heat
Off
Off
(c)
7. Two-position damper
8. Exit
High
(d)
Note: The 2-position damper energizes during this step if the controller is configured for a 2-position damper.
(a) At the beginning of step 2, the controller attempts to clear all diagnostics.
(b)Tracer™ ZN010 and ZN510 have a binary output default as “none” on J1-X from the factory. If the unit has a 2-speed fan,
step 3 will energize the low fan speed. If the unit has a single speed fan, step 3 will continue to energize the high fan speed.
This binary output can be reconfigured as an exhaust fan, with the use of Rover™ software.
(c) After the fresh air damper step, the test sequence performs the exit step.This initiates a reset and attempts to return the
controller to normal operation.
(d)For all 1-heat/1-cool applications including 2-pipe changeover, the cooling and heat test stage energize. This occurs even
though during normal 2-pipe changeover operation binary output controls the unit valve for both cooling and heating.
Table 40. Tracer ZN520 test sequence
Main
Electric heat or Fresh air
Fan
J1-2
valve
aux. valve
damper
Generic/baseboard heat
Step
J1-1
J1-3
J1-5
J1-6
J1-9
J1-10
J1-11
J1-12
TB4-1
(a)
1. Off
Off
Off
Off
Off
On
Off
aux: on
Off
On
Off
EH: off
(b)
2. Fan high
High
Off
Off
Off
Off
Low
Off
Off
Off
Off
Off
Off
On
Off
Off
Off
Off
Off
Off
On
Off
Off
Off
Off
Off
On
On
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
(c)
3.
4. Fan low
Off
Off
Off
Off
Exh
5. Main open
High
High
6. Main close, EH1 on
7. Aux. open
(d)
High
EH1 on
8. Aux. close, damper open
High
Off
Off
Off
Off
Off
On
On
Off
Off
EH1 off
EH2 on
9. Damper close
High
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
On
Off
Off
On
10. Generic/baseboard heat energized High
(e)
11. Exit
Exit
(a) Upon entering manual output test mode, the controller turns off all fan and electric heat outputs and drives.
(b)At the beginning of step 2, the controller attempts to clear all diagnostics.
(c) The low fan speed output energizes at step 3. If the unit is configured for a 1 speed fan, the fan remains on high speed at step 3.
(d)If the unit is configured for a 1- or 2-speed fan, and BOP2 is configured for an exhaust fan, the exhaust fan output energizes on step 7. The exhaust
fan output is shared with medium speed.
(e) After step 10, the test sequence performs an exit. This initiates a reset and attempts to return the controller to normal operation.
Diagnostics
Translating Multiple Diagnostics
Thecontrollersenses andrecords each diagnostic independently of otherdiagnostics. It is possible
tohavemultiplediagnosticspresentsimultaneously. Thediagnosticsarereportedintheorderthey
occur.
Possible diagnostics include:
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Diagnostics
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Low temperature detection
Condensate overflow
Low air flow - fan status
Discharge air temp limit
Space temperature failure
1
Entering water temp failure
Discharge air temp failure
Outdoor air temp failure
Local setpoint failure
Local fan mode failure
CO sensor failure
2
Generic AIP failure
Humidity input failure
Defrosting compressor lockout
Maintenance required
Invalid Unit Configuration
Generic temperature failure
Discharge air low limit
Resetting Diagnostics
There are seven ways to reset unit diagnostics:
1. Automatically by the controller
2. By initiating a manual output test at the controller
3. By cycling power to the controller
4. By using a building automation system (Tracer™ ZN510 or ZN520 only)
5. By using the Rover™ service tool
6. By using any other communicating device able to access the controller’s diagnostic reset input
(Tracer ZN510 or ZN520 only)
7. By cycling the fan switch from off to any speed setting (Tracer ZN520 only)
Automatic Reset by the Controller
The controller includes an automatic diagnostic reset function which attempts to automatically
restore the unit when a low temperature diagnostic occurs.
Note: The controller implements the automatic diagnostic reset function only once every 24
hours. For the controller to increment the 24 hour timer, you must maintain power to the
controller. Cycling power resets all timers and counters.
After the controller detects the first low temperature diagnostic, the unit waits 30 minutes before
invoking the automatic diagnostic reset function. The automatic diagnostic reset function clears
the special diagnostic and attempts to restore the controller to normal operation. The controller
resumes normal operation until another diagnostic occurs.
Note: The automatic diagnostic reset function does not operate during the manual output test
sequence.
If a special diagnostic occurs within 24 hours after an automatic diagnostic reset, the controller
must be manually reset. Other possible methods of resetting diagnostics are described in the
sections that follow.
1
Non-latching diagnostics automatically reset when the input is present and valid.
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Diagnostics
Manual Output Test
You can use the Test button on the controller either during installation to verify proper end device
operation or during troubleshooting. When you press the Test button, the controller exercises all
outputs in a predefined sequence. The first and last outputs of the sequence reset the controller
Cycling Power
When someone turns off the controller’s 24 VAC power, then re-applies power, the unit cycles
through a power up sequence. By default, the controller attempts to reset all diagnostics at power
up. Diagnostics present at power-up and those that occur after power-up are handled according to
Building Automation System (Tracer ZN510 or ZN520 Only)
Some building automation systems can reset diagnostics in the Tracer™ ZN510 or ZN520
controller. For more complete information, refer to the product literature for the building
automation system.
Rover Service Tool
Rover™ service tool can reset diagnostics in the Tracer™ ZN520 controller. For more complete
information, refer to the Rover Installation, Operation, and Programming manual.
Diagnostic Reset (Tracer ZN510 or ZN520 Only)
Any device that can communicate the network variable nviRequest (enumeration “clear_alarm”)
can reset diagnostics in the Tracer™ ZN510 or ZN520 controller. The controller also attempts to
reset diagnostics whenever power is cycled.
Cycling the Fan Switch (Tracer ZN520 Only)
If the user cycles the fan speed switch from off to any speed, the controller resets all diagnostics.
Diagnostics may recur immediately if the problem still exists.
The green LED normally indicates whether or not the controller is powered on (24 VAC).
Trane’s Service Tool, Rover
Rover™, Trane’s service tool, can reset diagnostics present in the controller. For complete
information about Rover, refer to Trane publication EMTX-IOP-2 Rover Installation, Operation and
Programming Guide.
Alarm Reset
Any device that can communicate alarm reset information can reset diagnostics present in the
controller.
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Diagnostics
Table 41. Tracer ZN010 and ZN510 controller diagnostics
Diagnostic
Latching
No
Fan
Valves
No action
Closed
Electric heat
No action
Off
Damper
No action
Closed
Auxiliary temperature failure
Condensate overflow detection
Entering water temperature
Fan mode failure
Enabled
Off
Yes
No
Enabled
Enabled
Disabled
Off
Enabled
Enabled
Disabled
Open
Enabled
Enabled
Disabled
Off
Enabled
Enabled
Disabled
Closed
No
Invalid unit configuration failure
Low temperature detection
Maintenance required
Setpoint
Yes
Yes
Yes
Enabled
Enabled
Off
No action
No action
Closed
No action
No action
Off
No action
No action
Closed
No
Zone temperature failure
Notes:
No
1. Priority Level: Diagnostics are listed in order from highest to lowest priority. The controller senses and records each
diagnostic independently of other diagnostics. It is possible to have multiple diagnostics present simultaneously. The
diagnostics affect unit operation according to priority level.
2. Latching: A latching diagnostic requires a manual reset of the controller; while a non-latching diagnostic automatically
resets when the input is present and valid.
3. Enabled: End device is allowed to run if there is a call for it to run.
4. Disabled: End device is not allowed to run even if there is a call for it to run.
5. No Action: The diagnostic has no affect on the end device.
Table 42. Tracer ZN520 diagnostics
(a)
Diagnostic
Fan Other outputs
Condensate overflow
Off
Off
Off
Off
On
Off
Off
On
Valves closed, fresh air damper closed, electric heat off, baseboard heat off
Valves open, fresh air damper closed, electric heat off, baseboard heat off
Valves closed, fresh air damper closed, electric heat off, baseboard heat off
Valves closed, fresh air damper closed, electric heat off, baseboard heat off
Low temperature detection
Low air flow - fan failure
Space temperature failure
Entering water temperature failure
Discharge air temperature low limit
Discharge air temperature failure
Fresh air temperature failure
(b)
Valves enabled , fresh air damper enabled , electric heat enabled , baseboard heat off
Valves open, fresh air damper closed, electric heat off, baseboard heat off
Valves closed, fresh air damper closed, electric heat off, baseboard heat off
(c)
Valves enabled, fresh air damper minimum position , electric heat enabled, baseboard heat
enabled
Relative humidity failure
Generic 4-20ma failure
On
On
On
On
On
On
Off
On
Valves enabled, fresh air damper enabled, electric heat enabled, baseboard heat enabled
Valves enabled, fresh air damper enabled, electric heat enabled, baseboard heat enabled
Valves enabled, fresh air damper enabled, electric heat enabled, baseboard heat enabled
Valves enabled, fresh air damper enabled, electric heat enabled, baseboard heat enabled
Valves enabled, fresh air damper enabled, electric heat enabled, baseboard heat enabled
Valves enabled, fresh air damper enabled, electric heat enabled, baseboard heat enabled
Valves disabled, fresh air damper disabled, electric heat disabled, baseboard heat disabled
Valves enabled, fresh air damper enabled, electric heat enabled
CO input failure
2
Maintenance required
Local fan mode failure
Local setpoint failure
Invalid unit configuration
Normal - power up
(a) The generic binary output (TB4-1, TB4-2) state is unaffected by all unit diagnostics.
(b)When the entering water temperature is required but not present, the Tracer™ ZN520 controller generates a diagnostic to indicate the sensor loss
condition. The controller automatically clears the diagnostic once a valid entering water temperature value is present (non-latching diagnostic). When
theentering water temperature sensor fails, the controller prohibits all hydronic cooling operation, butallows the delivery of heat when heating is required.
In the Cool mode, all cooling is locked-out, but normal fan and outdoor air damper operation is permitted.
(c) When the outdoor air temperature sensor has failed or is not present, the Tracer ZN520 controller generates a diagnostic to indicate the sensor loss
condition. The controller automatically clears the diagnostic once a valid outdoor air temperature value is present (non-latching diagnostic). When the
outdoor air temperature sensor fails or is not present, the controller prohibits economizer operation.
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Diagnostics
Common Diagnostics
Table 43. Fan outputs do not energize
Probably cause
Explanation
Random start observed
After power-up, the controller always observes a random start that varies between 0 and 30 seconds. The controller
remains off until the random start time expires.
Power-up control wait
When power-up control wait is enabled (non-zero time), the controller remains off until one of two conditions occurs:
1. The controller exits power-up control wait once it receives communicated information.
2. The controller exits power-up control wait once the power-up control wait time expires.
Cycling fan operation
Unoccupied operation
When the fan mode switch is in the auto position, the unit fan cycles off when there is no call for heating or cooling.
The heating/cooling sources cycle on or off periodically with the unit fan to match the capacity according to pulse width
modulation (PWM) logic.
The fan cycles with capacity when the unit is in unoccupied mode. This occurs even if the unit is in continuous fan
operation. While unoccupied, the fan cycles on or off with heating/cooling to provide varying amounts of heating or
cooling to the space. to match the capacity diagnostics according to pulse-width-modulation (PWM) logic.
Fan mode off
When using the local fan mode switch to determine the fan operation, the off position controls the unit fan to off.
Requested mode: off
It is possible to communicate the operating mode (such as off, heat, and cool) to the controller. When “off” is
communicated to the controller, the unit controls the fan to off. The unit is not capable of heating or cooling when the
controller is in this mode.
Diagnostic present
A specific list of diagnostics affects fan operation. For more information, see Table 41, p. 77 and Table 42, p. 77.
No power to the
controller
If the controller does not have power, the unit fan does not operate. For the Tracer™ ZN controller to operate normally,
it must have an input voltage of 24 VAC. When the green LED is off continuously, the controller does not have sufficient
power or has failed.
Unit configuration
Manual output test
The controller must be properly configured based on the actual installed end devices and application. When the unit
configuration does not match the actual end devices, the valves may not work correctly.
The controller includes a manual output test sequence to verify binary output operation and the associated wiring.
However, based on the current step in the test sequence, the unit fan may not be powered on. Refer to “Manual Output
Unit wiring
The wiring between the controller outputs and the fan relays and contacts must be present and correct for normal fan
operation. Refer to the specific unit wiring diagrams on the unit.
Table 44. Valves stay closed
Probable cause
Normal operation
Requested mode: off
Explanation
The controller opens and closes the valves to meet the unit capacity requirements.
It is possible to communicate the operating mode (such as off, heat, and cool) to the controller. When off is
communicated to the controller, the unit controls the fan to off. The unit is not capable of heating or cooling when the
controller is in this mode.
Valve override
The controller can communicate a valve override request.This request affects the valve operation.
Manual output test
The controller includes a manual output test sequence to verify analog and binary output operation and the associated
wiring. However, based on the current step in the test sequence, the valves may not be open. Refer to the “Manual
Diagnostic present
Sampling logic
A specific list of diagnostics affects valve operation. For more information, see Table 41, p. 77 and Table 42, p. 77.
The controller includes entering water temperature sampling logic that automatically invokes during 2-pipe or 4-pipe
changeover. It determines when the entering water temperature is either too cool or too hot for the desired heating
Unit configuration
The controller must be properly configured based on the actual installed end devices and application. When the unit
configuration does not match the actual end device, the valves may not work correctly.
No power to the
controller
If the controller does not have power, the unit fan does not operate. For the Tracer™ ZN010, 510 controller to operate
normally, it must have an input voltage of 24 VAC. When the green LED is off continuously, the controller does not have
sufficient power or has failed.
Unit wiring
The wiring between the controller outputs and the valve(s) must be present and correct for normal valve operation.
Refer to the unit wiring diagrams on the unit.
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Diagnostics
Table 45. Valves stay open
Probable cause
Normal operation
Valve override
Explanation
The controller opens and closes the valves to meet the unit capacity requirements.
The controller can communicate a valve override request to affect the valve operation.
Manual output test
The controller includes a manual output test sequence that verifies analog and binary output operation and the
associated wiring. However, based on the current step in the test sequence, the valves may be open. Refer to the
Diagnostic present
Sampling logic
A specific list of diagnostics affects valve operation. For more information, see Table 41, p. 77 and Table 42, p. 77.
The controller includes entering water temperature sampling logic that automatically invokes during 2-pipe or 4-pipe
changeover to determine if the entering water temperature is correct for the unit operating mode. Refer to “Entering
Unit configuration
Unit wiring
The controller must be properly configured based on the actual installed end devices and application. When the unit
configuration does not match the actual end device, the valves may not work correctly.
The wiring between the controller outputs and the valve(s) must be present and correct for normal valve operation.
Refer to the unit wiring diagrams on the unit.
Table 46. Electric heat not operating
Probable cause
Normal operation
Requested mode: off
Explanation
The controller cycles electric heat on and off to meet the unit capacity requirements.
It is possible to communicate the operating mode (such as off, heat, cool) to the controller. When off is communicated
to the controller, the units shuts off the electric heat.
Communicated disable
Manual output test
Numerous communicated requests may disable electric heat, including an auxiliary heat enable input and the heat/
cool mode input. Depending on the state of the communicated request, the unit may disable electric heat.
The controller includes a manual output test sequence that verifies analog and binary output operation and associated
output wiring. However, based on the current step in the test sequence, the electric heat may not be on. Refer to the
Diagnostic present
Unit configuration
A specific list of diagnostics affects electric heat operation. For more information, see Table 41, p. 77 and Table 42,
The controller must be properly configured based on the actual installed end devices and application. When the unit
configuration does not match the actual end device, the electric heat may not work properly.
No power to the
controller
If the controller does not have power, the unit fan does not operate. For the Tracer™ ZN010, 510 controller to operate
normally, it must have an input voltage of 24 VAC. When the green LED is off continuously, the controller does not have
sufficient power or has failed.
Unit wiring
The wiring between the controller outputs and the electric heat contacts must be present and correct for normal electric
heat operation. Refer to the unit wiring diagrams on the unit.
Table 47. Fresh air damper stays closed
Probable cause
Explanation
Warm-up and cool-down The controller includes both a warmup and cooldown sequence to keep the fresh air damper closed during the transition
from unoccupied to occupied. This is an attempt to bring the space under control as quickly as possible.
Requested mode: off
It is possible to communicate the operating mode (such as off, heat, cool) to the controller. When off is communicated
to the controller, the unit closes the fresh air damper.
Manual output test
The controller includes a manual output test sequence that verifies analog and binary output operation and associated
output wiring. However, based on the current step in the test sequence, the fresh air damper may not be open. Refer
Diagnostic present
Unit configuration
A specific list of diagnostics effects fresh air damper operation. For more information, see Table 41, p. 77 and Table 42,
The controller must be properly configured based on the actual installed end devices and application. When the unit
configuration does not match the actual end device, the damper may not work correctly.
No power to the
controller
If the controller does not have power, the unit fan does not operate. For the Tracer™ ZN010, 510 controller to operate
normally, it must have an input voltage of 24 VAC. When the green LED is off continuously, the controller does not have
sufficient power or has failed.
Unit wiring
The wiring between the controller outputs and the fresh air damper must be present and correct for normal damper
operation. Refer to the unit wiring diagrams on the unit.
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Diagnostics
Table 48. Fresh air damper stays open
Probable cause
Explanation
Normal operation
Thecontrolleropensandclosesthefreshairdamperbasedonthecontroller’soccupancymodeandfanstatus. Normally,
the fresh air damper is open during occupied mode when the fan is running and closed during unoccupied mode.
Manual output test
The controller includes a manual output test sequence that verifies analog and binary output operation and associated
wiring. However, based on the current step in the test sequence, the fresh air damper may be open. Refer to the “Manual
Unit configuration
Unit wiring
The controller must be properly configured based on the actual installed end devices and application. When the unit
configuration does not match the actual end device, the damper may not work correctly.
The wiring between the controller outputs and the fresh air damper must be present and correct for normal damper
operation. Refer to the unit wiring diagrams on the unit.
Table 49. Valves stay closed
Probable cause
Explanation
Requested mode off
You can communicate a desired operating mode (such as off, heat, and cool) to the controller. When off is communicated
to the controller, the unit controls the fan off. There is no heating or cooling (valves are closed).
Power-up control wait
Manual output test
When power up control wait is enabled (non-zero time), the controller remains off until one of two conditions occurs:
The controller exits power up control wait once it receives communicated information.
The controller exits power up control wait once the power up control wait time expires.
The controller includes a manual output test sequence you can use to verify output operation and associated output
wiring. However, based on the current step in the test sequence, the valve(s) may not be open. Refer to the “Manual
Fan mode off
When a local fan mode switch (provided on the Trane zone sensor) determines the fan operation, the off position
controls the unit off and valves to close.
Sampling logic
The controller includes entering water temperature sampling logic which is automatically invoked during 2-pipe and
4-pipe changeover when the entering water temperature is either too cool or too hot for the desired heating or cooling.
Diagnostic present
Unit configuration
A specific list of diagnostic affects valve operation. For more information, see Table 41, p. 77 and Table 42, p. 77.
The controller must be properly configured based on the actual installed end devices and application. When the unit
configuration does not match the actual end devices, the valves may not work correctly.
Example: A 2-pipe heat/cool changeover unit will not cool if the entering water temperature is too warm for cooling
or if the entering water sensor is not present. The unit will not heat if the entering water temperature is too cool for
heating.
Unit wiring
The wiring between the controller outputs and the valve(s) must be present and correct for normal valve operation.
Random start observed
After power up, the controller always observes a random start from 0 to 25 seconds. The controller remains off until
the random start time expires.
Table 50. DX or electric outputs do not energize
Probable cause
Unit wiring
Explanation
The wiring between the controller outputs and the end devices must be present and correct for normal operation.
Unit configuration
The controller must be properly configured based on the actual installed end devices and application. When the unit
configuration does not match the actual end devices, the unit may not work correctly.
Diagnostic present
Manual output test
A specific list of diagnostic affects valve operation. For more information, see Table 41, p. 77 and Table 42, p. 77.
The controller includes a manual output test sequence you can use to verify output operation and associated output
wiring. However, based on the current step in the test sequence, the valve(s) may not be open. Refer to the “Manual
Freeze avoidance
Normal operation
When the fan is off with no demand for capacity (0%) and the outdoor air temperature is below is below the freeze
avoidance setpoint, the controller disables compressors and electric heat outputs. This includes unoccupied mode when
there is no call for capacity or any other time the fan is off.
The controller energizes the outputs only as needed to meet the unit capacity requirements.
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Wiring Diagrams
Two-Pipe BCXC with Tracer ZN510
•
•
•
•
•
•
208 volt/3 phase
2-position damper
single stage electric heat
2-position valve
condensate overflow
wall-mounted zone sensor
ƽ WARNING
Hazardous Voltage!
Disconnect all electric power, including
remote disconnects before servicing. Follow
proper lockout/tagout procedures to ensure
the power can not be inadvertently
energized. Failure to disconnect power before
servicing could result in death or serious
injury.
NOTICE
Use copper conductors only!
Unit terminals are not designed to accept
other conductor types. Failure to use copper
conductors could cause equipment damage.
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Wiring Diagrams
Four-Pipe BCXC with Tracer ZN510
•
•
•
•
•
•
208 volt/3 phase
2-position valves
2-position damper
condensate overflow
low limit protection
wall-mounted zone sensor
ƽ WARNING
Hazardous Voltage!
Disconnect all electric power, including
remote disconnects before servicing. Follow
proper lockout/tagout procedures to ensure
the power can not be inadvertently
energized. Failure to disconnect power before
servicing could result in death or serious
injury.
NOTICE
Use copper conductors only!
Unit terminals are not designed to accept
other conductor types. Failure to use copper
conductors could cause equipment damage.
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Wiring Diagrams
Four-Pipe BCXC with Tracer ZN510
•
•
•
•
•
115 volt/1 phase
2-position valves
2-position damper
2-speed motor
condensate overflow
ƽ WARNING
Hazardous Voltage!
Disconnect all electric power, including
remote disconnects before servicing. Follow
proper lockout/tagout procedures to ensure
the power can not be inadvertently
energized. Failure to disconnect power before
servicing could result in death or serious
injury.
NOTICE
Use copper conductors only!
Unit terminals are not designed to accept
other conductor types. Failure to use copper
conductors could cause equipment damage.
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Wiring Diagrams
Two-Pipe BCXC with Tracer ZN520
•
•
•
•
•
•
•
460 volt/3 phase
2-position valve
economizer damper
2-stage electric heat
fan status switch
condensate overflow
wall-mounted zone sensor
ƽ WARNING
Hazardous Voltage!
Disconnect all electric power, including
remote disconnects before servicing. Follow
proper lockout/tagout procedures to ensure
the power can not be inadvertently
energized. Failure to disconnect power before
servicing could result in death or serious
injury.
NOTICE
Use copper conductors only!
Unit terminals are not designed to accept
other conductor types. Failure to use copper
conductors could cause equipment damage.
84
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Wiring Diagrams
Four-Pipe BCXC with Tracer ZN520
•
•
•
•
460 volt/3 phase
2-position valves
condensate overflow
fan status switch
ƽ WARNING
Hazardous Voltage!
Disconnect all electric power, including
remote disconnects before servicing. Follow
proper lockout/tagout procedures to ensure
the power can not be inadvertently
energized. Failure to disconnect power before
servicing could result in death or serious
injury.
NOTICE
Use copper conductors only!
Unit terminals are not designed to accept
other conductor types. Failure to use copper
conductors could cause equipment damage.
BCXC-SVX01B-EN
85
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Wiring Diagrams
Four-Pipe BCXC with Tracer ZN520
•
•
•
•
•
460 volt/3 phase
economizer damper
condensate overflow
fan status switch
wall-mounted zone sensor
ƽ WARNING
Hazardous Voltage!
Disconnect all electric power, including
remote disconnects before servicing. Follow
proper lockout/tagout procedures to ensure
the power can not be inadvertently
energized. Failure to disconnect power before
servicing could result in death or serious
injury.
NOTICE
Use copper conductors only!
Unit terminals are not designed to accept
other conductor types. Failure to use copper
conductors could cause equipment damage.
86
BCXC-SVX01B-EN
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Wiring Diagrams
Four-Pipe BCXC with Tracer ZN520
•
•
•
•
•
•
460 volt/3 phase
3-wire floating point valves
economizer damper
condensate overflow
fan status switch
wall-mounted zone sensor
ƽ WARNING
Hazardous Voltage!
Disconnect all electric power, including
remote disconnects before servicing. Follow
proper lockout/tagout procedures to ensure
the power can not be inadvertently
energized. Failure to disconnect power before
servicing could result in death or serious
injury.
NOTICE
Use copper conductors only!
Unit terminals are not designed to accept
other conductor types. Failure to use copper
conductors could cause equipment damage.
BCXC-SVX01B-EN
87
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Wiring Diagrams
Four-Pipe BCXC with Control Interface
•
•
•
•
•
• 208 volt/3 phase
• 3-wire floating point valves
• 2-position damper
• low limit protection
• condensate overflow
ƽ WARNING
Hazardous Voltage!
Disconnect all electric power, including
remote disconnects before servicing. Follow
proper lockout/tagout procedures to ensure
the power can not be inadvertently
energized. Failure to disconnect power before
servicing could result in death or serious
injury.
NOTICE
Use copper conductors only!
Unit terminals are not designed to accept
other conductor types. Failure to use copper
conductors could cause equipment damage.
88
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Wiring Diagrams
Four-Pipe BCXC with Control Interface
•
•
•
•
•
115 volt/1 phase
2-position damper
2-speed motor
condensate overflow
low limit protection
ƽ WARNING
Hazardous Voltage!
Disconnect all electric power, including
remote disconnects before servicing. Follow
proper lockout/tagout procedures to ensure
the power can not be inadvertently
energized. Failure to disconnect power before
servicing could result in death or serious
injury.
NOTICE
Use copper conductors only!
Unit terminals are not designed to accept
other conductor types. Failure to use copper
conductors could cause equipment damage.
BCXC-SVX01B-EN
89
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Wiring Diagrams
BCXC with DX Coil and Tracer ZN520
•
•
•
•
277 volt/1 phase
economizer damper
condensate overflow
wall-mounted zone sensor
NOTES:
1
UNLESSS OTHERRWISEE NNOTEDD,, ALL SWWITCHHEES ARE SSHOWN
AT 25°° C (777°° F), AT ATMOOSPHEERIC PPRRESSURE, AT
LEGEND
DEVICE PPREFIX LLOCATIIOON CODE
277/60/1
N
LOCATION
AREA
DEVICE
DESIGNATION
LINE
NUMBER
L1
50% RELAATIVE HHUMIDIITY, WWIITH ALLL UTILIITIESTTURNED
OFF, ANND AFTTEER A NORRMAL SSHUTDOWN HASS OCCURED.
DESCRIPTION
1
2
1
2
3
MAIN CONTROOL PANEL
SUPPLY FANN AND COOIL SECCTION
1CB1
1K1
TRANSFORRMER CIRRCUIT BBRREAKER
SUPPLY FAN COONTACTOR
DX RELAY
16
20
24
2
DASHEDD LINESS INDICCATE REECOMMEENDED FFIELD WWIRING
BY OTHEERS. DDAASHED LLINE ENNCLOSUURES ANND/OR DDASHED
DEVICEE OUTLIINES IINNDICATTE COMPPONENTTS PROVIDED
BYTHE FIELD. SOLID LINES INDICATE WIRING BY
TRANE CO.
4
5
6
7
MIXING BOX SECTION
EXTERNAL PIPING
ELECTRIC HEAT CONTROL BOX
FIELD INSTALLED DEVICE
1K3
3
7
S
S
6
6
7S6
1T1
1TB1-L11,-L2
1U1
CONTROOL POWERRTRANSSFFORMER
CONTROOLTERRMINAL BLOCK
ZN CONTRROLLER
16
3
4
ALL FIELD WIRINNG MUSTT BE INN ACCORRDANCCE WITHTHE
NATIONAL ELEECTRIIC CODDEE (NEC), STATEE AND LLOCAL
REQUIREMMENTS.
4
18
11
2B1
SUPPLY FANN MOTOR
NUMBERS ALONGGTHE RRIGHT SSIDE OOFTHE SSCHEMATIC
DESIGNAATETHEE LLOCATIION OF CCONTACCTS BY LLINE NUUMBER.
5
2S2
CONDENNSATE OVERFLOW SSWITCH
32
5
FIELD SUUPPLIEED CONNTROL RELAYSS, POWEERED BYYTHIS UNIT,
MUST BE PILOT DUUTY RAATED,, 224VAC COILL, 6VAA MAX.
6
2S5
2S7
2S8
4U4
FAN STATUUS SWITCH
36
23
24
27
ELECTRIC HEAT
CONTROL BOX
1S1
6
7
WIRINGGTO ZONNEE SENSOOR MUSTT BE 16--22 AWGG, CUTWWISTED
PAIR SHIIELDEEDD CABLEE AND NNO MORETHANN 10000 FFT LG.
SHIELD MMUST BEE GGROUNDDED AT UUCM ENDD(END CCHASSIIS) AND
TAPED ATTHE OTHER END. IF INSTALLED IN CONDUIT, DO
NOT INSTTALL WIIRRES IN CCONDUITTTHAT CCONTAIINNS WIREES 24VAC
OR HIGH VVOLTAGEE POWERR WWIRES.
ELECTRIC HT LOCKOOUT SWITCH
EVAP DEFRROST FROSTAT
7
MIXING BOOX DAMPPER ACTTUATOR
8
WHT BLK
COMMUNICATION WWIRE MUSTT BETRANEE PART NO.
400-20-28, OR WWINDY CIITTY OR CONNNECT AIR
"LEVEL 4" CABLE. MAXIMUM OF 4500 FOOT
AGGREGATE RUN.
CAUTION! DO NOT RUN POWER INTHE SAME
CONDUIT OR WIRRE BUNNDDLE WITTH COMMMUNICAATION LINK.
FOR ADDITIONAAL INFORMAATION REFERTO EMTTX-EBB-68.
9
1K1
1K21
1K1
4A(WHT)
WHT,BRN
2B1
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
COM
7K5
EXHAUST FAN CONTTROL RRELAY
21
M
8
9
31
LOW
HI
7RT1
7RT3
7S6
DISCHARGGE AIRTTEMP SSEENSOR
OUTSIDDE AIRRTTEMP SEENSOR
FUSED DISCONNNECT SSWWITCH
33
35
3
BLK,BLK
BLK
5A
GRN
7U6
P
ZONE SENSORR MODULE
PLUG CONNNECTOR
JACK CONNNECTOR
20
BRN
J
1T1
1CB1
1TB1-L2
11
W(BLK)
BLU
YEL
B(BLK)
24V
75VA
1TB1-L2
E
D(WHT)
1U1
POWER
11
1TB1-L1
C,K
10
D
(BLK)
TB1-1 24V
J1
GNDTB1-2
6
7U6
1K1
7K5
1K2
W,X
E
(BLK)
17A(BLK)
14A(YEL)
1K1-10,12
1
HIGH SPEED
ZONETB3-1
GNDTB3-2
SETTB3-3
FANTB3-4
1
2
3
4
6
5
ZONE
1TB1-L1
10
1P1-1
1P1-2
1P1-3
5
1TB1-L1
1TB1-L1
1TB1-L1
2
EXHAUST
COM
10
CSP
5
1K3
5P4-2
5J4-2
5P3-2
1P2-1
5P3-1
DX COOLING
5P4-1
1P2-2
1J2-2
11PP22--23
19B
G
K
FAN SWITCH
COMM LOW(-)
COMM HI(+)
1J2-1
2J3-1
5J4-1
5P3-3
2J3-2
2
4
10
1P1-5
C
1K3
8
5P4-3
5P3-3
1P2-1
1J2-1
1P5-1
1P2-3
5P4-3
5J4-3
2S8
2J3-3
5P6-2
2J6-2
5P6-3
2J6-3
J
G,J
38A
5J4-3
3
1K3-23
5
9
ON/OFF
CLG
STAGE 1
TB2-6
COMM
1J2-3
2J3-3
1J2-3
1
-
1J2-2
1P1-56
5P7-2
5P6-1
COMMON
2J6-1
5P7-1
STAGE 1
5J7-1
1P5-2
2S7
X
BRN
ORG
PUR
15C(ORG)
1J5-2
TB2-5
1J5-1
5J7-2
5P7-3
5J7-3
10
1P1-9
+
-
ELECTRIC HEAT
8
1P5-3
5P6-3
5P7-3
1P5-3
LO(-)
16C(PUR)
1J5-3
CONTROL BOX
STAGE 2
10 STAGE 2
11 OPEN
TB2-4
COMM
1J5-3
2J6-3
5J7-3
TR1
TR
1P1-10
TRACER
COMM OUT
4U4
TR1 CCW
1J8-1
1P8-1
2J9-1
1P8-3
4P9-3
HI(+)
E(WHT)
1J8-3
C
B
12A(PNK)
1P1-11
13A(BRN)
1P1-12
TB2-3
CCW
CW
V
1P8-4
V
X
R
2J9-3
4P9-1
SPLICE AND
INSULATE SHIELDS
+
-
OAD
1J8-2
4P9-4
2J9-4
2J9-2
4P9-2
C
B
B(BLK)
TR
CW
12 CLOSE
TB2-2
1J8-4
LO(-)
1P8-2
TRACER
COMM IN
COMM
7
TB4-1 BOP
TB2-1
HI(+)
+
GENERIC BOP
GENERIC
TB4-2 24V
9
2S3
5RT2
5P10-1
5P10-2
1P11-1
2J10-1
1P11-2
2J10-2
1J11-1
2S2
23A(PUR)
2J13-1
B
2P13-1
B
2J13-2
J2-3
J2-4
J2-5
J2-6
J2-7
J2-8
1J11-2
2J12-1
2J12-2
2P13-2
GREEN PLUG
ƽ WARNING
Hazardous Voltage!
BI-2
27RT1
SPLICE
SPLICE
CONDENSATE
24A(PUR)
J3-3
AI-2 DAT
2P12-1
Disconnect all electric power, including
J3-4
J3-5
J3-6
2P12-2
SPLICE
OR FIELD RECONFIGURED
AS GENERIC
BI-3
OCC/UNOCC
remote disconnects before servicing. Follow
proper lockout/tagout procedures to ensure
the power can not be inadvertently
7RT3
SPLICE
AI-3-OAT
2S5
25A(YEL)
26A(YEL)
energized. Failure to disconnect power before
servicing could result in death or serious
injury.
BI-4
P
d
FAN-STAT
NOTICE
Use copper conductors only!
Unit terminals are not designed to accept
other conductor types. Failure to use copper
conductors could cause equipment damage.
90
BCXC-SVX01B-EN
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Wiring Diagrams
BCXC with DX Coil, Hydronic Heating, and Tracer ZN520
•
•
•
•
460 volt/3 phase
economizer damper
condensate overflow
wall-mounted zone sensor
NOTES:
1
UNLESSS OTHERRWISEE NNOTEDD,, ALL SWWITCHHEES ARE SSHOWN
AT 25˚ C (77˚ F), AT ATMOSSPHERRIC PREESSURE, AT
LEGEND
DEVICE PPREFIX LLOCATIIOON CODE
460/60/3
L1 L2
LOCATION
AREA
DEVICE
DESIGNATION
LINE
DESCRIPTION
L3
50% RELAATIVE HHUMIDIITY, WWIITH ALLL UTILIITIES TTURNED
OFF, ANND AFTTEER A NORRMAL SSHUTDOWN HAAS OCCCUURED.
1
NUMBER
1
2
3
MAIN CONTROL PANEL
SUPPLY FAN AND COOIL SECTION
1CB1
1K1
TRANSFORRMER CIRRCUIT BBRREAKER
SUPPLY FAN COONTACTOR
DX RELAY
16
20
24
7
2
DASHED LLINES IINDICAATE REECCOMMENNDED FFIIELD WIIRING
BY OTHEERS. DDAASHED LLINE ENNCLOSUURES ANND/OR DDASHED
DEVICEE OUTLIINES IINNDICATTE COMPPONENTTS PROVIDED
BY THE FIELD. SOLID LINES INDICATE WIRING BY
TRANE CO.
2
4
5
6
7
MIXING BOX SECTION
EXTERNAL PIPING
1K3
1S1
MANUAL DDISCONNNECT SSWITCH
CONTROOL POWERR TRANSSFFORMER
CONTROOL TERRMMINAL BBLOCK
ZN CONTRROLLER
3
7
S
S
66
7S6
1T1
16
3
4
ALL FIELD WIRRING MUSST BE IN ACCORDANCE WITH THE
NATIONAL ELECTRIC COODE (NEC), STATE AND LOCAL
REQUIREEMENTS.
FIELD INSTALLED DEVICE
1TB1-L1,-L2
1U1
4
18
11
33
32
30
2B1
SUPPLY FAAN MOTOR
NUMBERS ALOONG THE RRIGHT SIDE OF THE SCHEMATIC
DESIGNATE TTHE LOCATTION OF CONTACTS BY LINE NUMBER.
2RT1
2S2
DISCHARGE AIRR TEMP SENSOR
CONDENSSATE OVVEERFLOW SSWITCH
FREEZE-STAT
5
5
FIELD SUPPPLIEED CONTROLL RELAYS, POWERED BY THIS UNIT,
MUST BE PIILOT DUTYY RATED, 24VAC COIL, 6VA MAX.
2S3
6
GRN
BLK BLK
BLK
6
7
WIRING TO ZZONE SENSOOR MUST BE 16--22 AWG, CU TWISTED
PAIR SHIELDDED CABLEE AND NO MORE THAN 1000 FT LG.
SHIELD MUSTT BE GROUNNDED AT UCM END(END CHASSIS) AND
TAPED AT THE OTHER END. IF INSTALLED IN CONDUIT, DO
NOT INSTALLL WIREES IN CCOONDUIT THAT CONTAINS WIRES 24VAC
OR HIGHH VOLTAAGE POOWWER WIRES.
7
2S8
EVAP DEFROST FROSTAT
24
1S1
EQUIPMENT
GROUND
8
1A
2A
3A
COMMUNICATTION WIRREE MUST BE TRANE PART NO.
400-20-28, OR WINDYY CITY OR CONNECT AIR
"LEVEL 4" CABLE. MAXIMUM OF 4500 FOOT
AGGREGATE RUN.
9
1K1
1K21
1K1
7B3
7K5
HEATING COIL VAALVE MMOTOR
EXHAUST FAN CONTTROL RRELAY
25
21
4A
A,BLK/RED
A,BLK
A
2B1
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
CAUTION! DO NOT RUN POWER IN THE SAME
CONDUIT OR WWIRE BUNDDLE WITH COMMUNICATION LINK.
FOR ADDITIOONAL INFOORMATION REFER TO EMTX-EB-68.
COM
M
5A
8
9
BLUE CONNECCTORS USEED FOR COOLIING CIRCUIT,
RED CONNEECTORS USSED FOR HHEEATING CIRCUIT.
BLUE WIRESS USED FORR COOLINGG CIRCUIT, RED
WIRES USSED FORR HHEATINGG CIRCUIT.
31
LOW
HI
7RT3
7S6
7U4
7U6
P
OUTSIDE AIR TEMP SENSOR
FUSED DISCONNNECT SSWWITCH
MIXING BOOX DAMPPER ACTTUATOR
ZONE SENSORR MODULE
PLUG CONNNECTOR
35
3
6A
GRN
27
20
BLK
BLK/RED
J
JACK CONNNECTOR
1T1
1CB1
1TB1-L2
W(BLK)
BLU
YEL
B(BLK)
24V
75VA
11
1TB1-L2
E
D(WHT)
1U1
POWER
11
1TB1-L1
C,K,M
D
(BLK)
TB1-1 24V
J1
GND TB1-2
10
6
7U6
ZONE
1K1
7K5
1K2
W
E
(BLK)
17A(BLK)
14A(YEL)
1K1-10,12
1
HIGH SPEED
ZONE TB3-1
GND TB3-2
SET TB3-3
FAN TB3-4
1
2
3
4
6
5
1TB1-L1 10
1P1-1
1P1-2
1P1-3
5
1TB1-L1
1TB1-L1
1TB1-L1
2
EXHAUST
COM
CSP
10
5
1K3
5P4-2
5J4-2
5P3-2
2J3-2
5P3-3
1P2-1
5P3-1
DX COOLING
5P4-1
1P2-2
1J2-2
11PP22--23
G
K
FAN SWITCH
COMM LOW(-)
COMM HI(+)
1J2-1
2J3-1
5J4-1
5P3-3
2
4
10
1P1-5
C
1K3
8
5P4-3
1P2-1
1J2-1
1P5-1
1J5-1
1P2-3
5P4-3
5J4-3
2S8
2J3-3
5P6-2
J
G,J
38A
5J4-3
3
19B
1K3-23
5
9
ON/OFF
CLG
ON/OFF
TB2-6
COMM
1J2-3
2J3-3
1J2-3
1
-
1J2-2
1P1-56
7B3 (7VA MAX)
5P7-2
5J7-2
5P7-3
5J7-3
5P6-1
2J6-1
1P5-3
1J5-3
1P8-3
5P7-1
1P5-2
C
1J5-2
2S7
M
L
B
15A
M
TB2-5
D
5J7-1
5P6-3
2J6-2
5P6-3
2J6-3
10
1P1-9
+
-
HTG
8
5P7-3
5J7-3
1P5-3
LO(-)
TB2-4
COMM
2J6-3
4P9-3
1J5-3
1P1-10
TRACER
COMM OUT
7U4
1J8-1
1P8-1
2J9-1
SPLICE
SPLICE
HI(+)
E(WHT)
1J8-3
12A(PNK)
1P1-11
13A(BRN)
1P1-12
TR1 CCW
11 OPEN
TB2-3
2J9-3
4P9-4
4P9-1
2J9-2
SPLICE
SPLICE AND
INSULATE SHIELDS
+
-
OAD
1J8-2
1P8-4
SPLICE
B(BLK)
TR
CW
12 CLOSE
TB2-2
1J8-4
LO(-)
2J9-4
4P9-2
1P8-2
TRACER
COMM IN
COMM
7
TB4-1 BOP
GENERIC
TB4-2 24V
TB2-1
HI(+)
+
GENERIC BOP
9
2S3
21A(GRA)
22A(GRA)
J2-1
J2-2
J2-3
J2-4
J2-5
J2-6
BI-1
5RT2
5P10-1
5P10-2
1P11-1
FRZ-STAT
2J10-1
1P11-2
1J11-1
2S2
23A(PUR)
2J13-1
B
2P13-1
B
2J13-2
ƽ WARNING
Hazardous Voltage!
2J10-2
1J11-2
34A(BRN)
2J12-1
35A(BRN)
2J12-2
2P13-2
GREEN PLUG
BI-2
27RT1
CONDENSATE
B
24A(PUR)
J3-3
AI-2 DAT
2P12-1
B
Disconnect all electric power, including
J3-4
J3-5
J3-6
2P12-2
OR FIELD RECONFIGURED
AS GENERIC
remote disconnects before servicing. Follow
proper lockout/tagout procedures to ensure
the power can not be inadvertently
energized. Failure to disconnect power before
servicing could result in death or serious
injury.
BI-3
OCC/UNOCC
7RT3
SPLICE
SPLICE
AI-3-OAT
2S5
NOTICE
Use copper conductors only!
Unit terminals are not designed to accept
other conductor types. Failure to use copper
conductors could cause equipment damage.
BCXC-SVX01B-EN
91
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Literature Order Number
Date
BCXC-SVX01B-EN
April 2008
Supersedes
BCXC-SVX01A-EN September 2002
For more information, contact your local Trane
office or e-mail us at [email protected]
Trane has a policy of continuous product and product data improvement and reserves the right to
change design and specifications without notice.
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