Installation, Operation,
and Maintenance
UniTrane Fan-Coil & Force Flo
Air Conditioners
200 to 1,200 cfm
Models FC & FF
“ZO” and later design sequence
Low vertical models FCKB & FCLB:
“SO” and later design sequence
April 2005
UNT-SVX07A-EN
contents
Cross reference to related publications/information for UniTrane™ fan-coil & Force
Flo™ equipment:
• Rover™ Installation, Operation and Programming Guide, EMTX-SVX01D-EN
• Tracer™ ZN510 Unit Controller, CNT-IOP-1
• Tracer™ ZN520 Unit Controller, CNT-SVX04A-EN
• UniTrane™ Fan-Coil Catalog, UNT-PRC001-EN
• Force Flo™ Cabinet Heater Catalog, CAB-PRC001-EN
Installation ……………………………………………………………2
general information ……………………………………………2
dimensions & weights ……………………………………… 10
pre-installation considerations ………………………………28
mechanical requirements ……………………………………30
electrical requirements ………………………………………36
installation procedure ………………………………………41
pre-startup requirements ……………………………………46
Operation ……………………………………………………………49
general information …………………………………………49
sequence of operation ………………………………………50
Maintenance…………………………………………………………60
diagnostics ……………………………………………………60
troubleshooting ………………………………………………64
maintenance procedures ……………………………………67
typical wiring diagrams ………………………………………71
UNT-SVX07A-EN
3
general
inform ation
General
Model Number
switch option, can be ordered with a low
voltage(24 volts AC) transformer and
three fan speed relays. The ship seperate
three-speed switch option, only comes
with a low voltage (24 volt AC) trans-
former and three fan speed relays.
Each UniTrane fan-coil and Force-Flo
cabinet heater has a multiple character
model number unique to that particular
unit. To determine a unit’s specific options,
reference the model number on the unit
nameplate on the fan scroll. The unit
nameplate also identifies the serial
number, sales order number, and
installation and operating specifications.
UniTrane fan-coil and Force Flo units are
intended for single zone applications.
These units have load capabilities of 200
to 1200 cfm. See Figure I-GI-1 for unit
components. Fan-coil units are available
as two-pipe, with or without electric heat
(one hydronic circuit) or four-pipe (two
hydronic circuits). Force-Flo units feature
two-pipe hydronic, electric heat only, or
steam only. Also, these units feature a
variety of factory mounted piping
packages.
The Tracer ZN010, ZN510, and ZN520
controllers are included inside the units
control box assembly. These controllers
utilize analog signals from a unit-mounted
control device or from a control device
mounted in the occupied space.
Following is a complete description of the
fan-coil model number. Each digit in the
model number has a corresponding code
that identifies specific unit options.
The controls interface option, includes a
24 volt AC transformer, and an interface
terminal board. Controls provided by an
external source, can be tied into the
Units with the three-speed fan switch
only, are available with the switch
mounted on the unit, or shipped sepa-
rately, to be mounted in the occupied
space. The unit mounted three-speed
1
interface terminal board, utilizing /4"
female spade connectors.
Factory assembled,
Smaller unit footprint
installed and tested piping
package with IAQ drain pan
to collect condensate
Factory installed
and tested controls
Two, three or
four-row coils
Quiet operation
Removable, noncorrosive,
positively-sloped drain pan that’s
easy to clean
Easy to remove fan assembly
Cleanable closed-
cell insulation (non-
fiberglass)
16-gage steel construction
Easy filter access
without front panel
removal
Damper allows up
to 100% fresh air
Figure I-GI-1. UniTrane fan-coil unit components. Vertical cabinet model is shown.
4
UNT-SVX07A-EN
general
Installation
inform ation
Model Number Description
FC B B 020 1 C P0 A 0 G 1 0 A A 2 M 000 0 0 1 0 0 0 A A 000 000 0 0 0 0 A 0 0
10 15 20 25 30 35 40 44
1
5
G = back open return
L = 3 row cooling/heating w/ elec heat
M= 4 row cooling/heating w/ elec heat
P = 2 row cooling/heating w/1 row heat
Q = 2 row cooling/heating w/2 row heat
R = 3 row cooling/heating w/1 row heat
Digits 1, 2 — unit type
FC = fan-coil
H = back stamped louver
FF = force flo
Digit 13 — fresh air damper
0 = none
A = manual, bottom opening
B = manual, back opening
C = manual, top opening
Digit 3 — cabinet type
A = vertical concealed
B = vertical cabinet
C = horizontal concealed
D = horizontal cabinet
E = horizontal recessed
F = vertical wall hung
H = vertical recessed
J = vertical cabinet slope top
K = low vertical concealed
L = low vertical cabinet
M = inverted vertical cabinet
N = inverted vertical recessed
Digit 19 — coil series
2 = 144 FPF
D = auto, 2-position, bottom opening
E = auto, 2-position, back opening
F = auto, 2-position, top opening
G = auto, economizer, bottom opening
H = auto, economizer, back opening
J = auto, economizer, top opening
K = no damper, bottom opening
L = no damper, back opening
Digit 20 — coil air vent
A = automatic air vent
M= manual air vent
Digits 21, 22, 23 — electric heat (208V
derate)
M= no damper, top opening
000 = no electric heat
010 = 1.0 kW (0.75 kW)
015 = 1.5 kW (1.1 kW)
020 = 2.0 kW (1.5 kW)
025 = 2.5 kW (1.9 kW)
030 = 3.0 kW (2.3 kW)
040 = 4.0 kW (3.0 kW)
050 = 5.0 kW (3.8 kW)
060 = 6.0 kW (4.5 kW)
070 = 7.0 kW (5.3 kW)
08 0= 8.0 kW (6.0 kW)
100 = 10.0 kW
Digit 14 — outlets
A = front duct collar
B = front bar grille
C = front stamped louver
D = front quad grille
G = top quad grille
H = top bar grille
Digit 4 — development sequence “B”
Digits 5, 6, 7 — unit size
020 040 080
030 060 100
120
J = top duct collar
Digit 8 — unit voltage
1 = 115/60/1 4 = 230/60/1
2 = 208/60/1 9 = 220/50/1
3 = 277/60/1
Digit 15 — color
0 = no paint (concealed units only)
1 = deluxe beige 4 = driftwood grey
Digit 24 — reheat coil
2 = soft dove
5 = stone grey
0 = none
A = steam coil
B = hot water coil
3 = cameo white 6 = rose mauve
Digit 9 — piping system/placement
A = no piping, RH, w/o aux drn pan
B = no piping, LH, w/o aux drn pan
C = no piping, RH, w/ aux drn pan
D = no piping, LH, w/ aux drn pan
E = no piping, RH, w/o aux drn pan,
extended end pocket
Digit 16 — tamperproof locks/leveling
feet
0 = none
A = locking panel
B = keylock access door
C = locking panel & keylock access door
D = leveling feet
F = locking panel w/ leveling feet
G = keylock panel, keylock access door
w/ leveling feet
Digit 25 — disconnect switch
0 = none
D = disconnect switch
Digit 26 — filter
0 = none
F = no piping, LH, w/o aux drn pan,
extended end pocket
1 = 1” throwaway filter
2 = 1” throwaway pleated media filter
3 = 1” throwaway, qty 2
G = no piping, RH, w/ aux drn pan,
extended end pocket
4 = 1” throwaway pltd media, qty 2
5 = 1” throwaway, qty 3
H = no piping, LH, w/ aux drn pan,
extended end pocket
Digit 17 — motor
A = free discharge
B = high static
6 = 1” throwaway pltd media, qty 3
7 = 1” throwaway, qty 4
8 = 1” throwaway pltd media, qty 4
J = piping package, RH
K = piping package, LH
L = piping package, RH, extd end pkt
M = piping package, LH, extd end pkt
Digit 18 — coil
Digit 27 — main control valve
0 = none
A = 2 row cooling/heating
B = 3 row cooling/heating
C = 4 row cooling/heating
D = 2 row cooling/1 row heating
E = 2 row cooling/2 row heating
F = 3 row cooling/1 row heating
G = 2 row cooling only
Digits 10, 11 — design sequence
A = 2-way, 2-position, NO (30 psig)
B = 3-way, 2-position, NO (28 psig)
C = 2-way, 2-position, NC (30 psig)
D = 3-way, 2-position, NC (20 psig)
E = 2-way, 2-position, NO (50 psig)
F = 3-way, 2-position, NO (28 psig)
G = 2-way, 2-position, NC (50 psig)
H = 3-way, 2-position, NC (28 psig)
Digit 12 — inlets
A = front toe space
B = front bar grille
C = front stamped louver
D = bottom stamped louver
E = bottom toe space
F = back duct collar
H = 3 row cooling only
J = 4 row cooling only
K = 2 row cooling/heating w/ elec heat
UNT-SVX07A-EN
5
general
Installation
inform ation
Digits 37, 38 — future cntrl functions
J = 2-way, modulating, 0.7 Cv (50 psig)*
K = 3-way, modulating, 0.7 Cv (50 psig)*
L = 2-way, modulating, 1.1 Cv (60 psig)*
M= 3-way, modulating, 1.1 Cv (60 psig)*
N = 2-way, modulating, 2.3 Cv (60 psig)*
P = 3-way, modulating, 2.7 Cv (60 psig)*
Q = 2-way, modulating, 3.3 Cv (60 psig)*
R = 3-way, modulating, 3.8 Cv (60 psig)*
X = field-supplied, NO
G = Tracer ZN520
H = CSTI
Digit 39 — projection panel/falseback
0 = none
Digit 31 — control option
D = unit mtd fan mode, unit voltage,
K = wall mtd fan mode
V = unit mtd fan sp w/ setpnt
X = unit mtd fan sp w/ wall mtd setpnt
Y = unit mtd fan sp & wall mtd setpnt w/
comm.
Z = unit mtd fan sp, on/cancel, setpnt w/
comm.
1 = wall mtd on/cancel w/ comm.
2 = wall mtd fan speed, setpnt, on/cancel
w/ comm.
3 = unit mtd fan speed switch, low voltage
4 = wall mtd digital zone sensor, fan sp w/
setpnt, on/cancel, comm.
5 = wall mtd digital zone sensor, setpnt,
on/cancel, comm.
A = 5/8”standard vertical recessed panel
B = 2” projection panel
C = 2.5” projection panel
D = 3” projection panel
E = 3.5” projection panel
F = 4” projection panel
G = 4.5” projection panel
H = 5” projection panel
J = 5.5”projection panel
K = 6” projection panel
L = 2”falseback
Y = field-supplied, NC
Z = field-supplied 3-wire modulating
Digit 28 — auxiliary control valve
0 = none
A = 2-way, 2-position, NO (30 psig)
B = 3-way, 2-position, NC (28 psig)
C = 2-way, 2-position, NC (30 psig)
D = 3-way, 2-position, NC (20 psig)
E = 2-way, 2-position, NO (50 psig)
F = 3-way, 2-position, NO (28 psig)
G = 2-way, 2-position, NC (50 psig)
H = 3-way, 2-position, NC (28 psig)
J = 2-way, modulating, 0.6 Cv (60 psig)
K = 3-way, modulating, 0.6 Cv (60 psig)
L = 2-way, modulating, 1.1 Cv (60 psig)
M= 3-way, modulating, 1.1 Cv (60 psig)
N = 2-way, modulating, 2.3 Cv (60 psig)
P = 3-way, modulating, 2.7 Cv (60 psig)
Q = 2-way, modulating, 3.3 Cv (60 psig)
R = 3-way, modulating, 3.8 Cv (60 psig)
X = field-supplied, NO
M = 3” falseback
N = 4” falseback
P = 5” falseback
Q = 6” falseback
R = 7” falseback
T = 8” falseback
Digit 32 — IAQ options
0 = none
1 = dehumidification
4 = dehumidification w/sensor
Digit 40 — main autoflow gpm
A = 0.5
G = 3.0
N = 7.0
P = 8.0
Q = 9.0
R = 10.0
T = 11.0
U = 12.0
B = 0.75 H = 3.5
Digit 33 — cntrl function #1
0 = w/o exhaust fan/damper or alarm
C = 1.0
D = 1.5
E = 2.0
F = 2.5
J = 4.0
K = 4.5
L = 5.0
M= 6.0
Digit 34 — cntrl function #2
0 = w/o occupant call or IAQ status
Y = field-supplied, NC
Z = field-supplied 3-wire modulating
Digit 41 — auxiliary autoflow gpm
Digit 35 — control function #3
0 = none
1 = occ/unocc control
2 = condensate overflow detection
3 = occ/unocc & condensate overflow
A = 0.5
F = 2.5
L = 5.0
M= 6.0
N = 7.0
P = 8.0
B = 0.75 G = 3.0
Digit 29 — piping packages
C = 1.0
D = 1.5
E = 2.0
H = 3.5
J = 4.0
K = 4.5
0 = none
A = basic ball valve S & R
B = basic ball valve S/man. crkt set
C = basic ball valve S & R w/auto crkt set
D = deluxe ball valve S & R
Digit 36 — cntrl function #4
0 = none
1 = smoke input
2 = low temperature detection
3 = smoke input & low limit sensor
Digit 42 — subbase
0 = none
A = 2” subbase
B = 3” subbase
C = 4” subbase
E = deluxe ball valve S /man. crkt set R
F = deluxe ball valve S & R w/auto crkt set
D =5” subbase
E =6” subbase
F =7” subbase
Digit 30 — control type
0 = none
A = fan speed switch
E = Tracer ZN010
F = Tracer ZN510
Digit 43 — recessed flange
0 = none
A = recessed flange
Digit 44 — wall boxes
0 = none
A = anodized wall box
6
UNT-SVX07A-EN
general
Installation
inform ation
Table I-GI-1. Fan-coil component data
unit size
02
03
04
06
08
10
12
Coil Data
Face Area — Ft2 (cm2)
LxDxH — In. (cm)
2-Row
0.8 (743)
0.8 (743)
1.1 (1020)
1.6 (1490)
2.1 (1950)
3.2 (2970)
3.2 (2970)
15x1.7x8
(38x4x20)
15x2.6x8
(38x7x20)
15x3.5x8
(38x9x20)
15x1.7x8
(38x4x20)
15x2.6x8
(38x7x20)
15x3.5x8
(38x9x20)
20x1.7x8
(51x4x20)
20x2.6x8
(51x7x20)
20x3.5x8
(51x9x20)
29.5x1.7x8
(75x4x20)
29.5x2.6x8
(75x7x20)
29.5x3.5x8
(75x9x20)
38x1.7x8
(97x4x20)
38x2.6x8
(97x7x20)
38x3.5x8
(97x9x20)
57x1.7x8
(145x4x20)
57x2.6x8
(145x7x20)
57x3.5x8
(145x9x20)
57x1.7x8
(145x4x20)
57x2.6x8
(145x7x20)
57x3.5x8
(145x9x20)
3-Row
4-Row
Volume — Gal. (Liters)
1-Row (Heat)
2-Row
3-Row
4-Row
.06 (.23)
.12 (.45)
.18 (.68)
.24 (.91)
.06 (.23)
.12 (.45)
.18 (.68)
.24 (.91)
.08 (.30)
.15 (.57)
.23 (.87)
.30 (1.14)
.11 (.42)
.22 (.83)
.33 (1.25)
.44 (1.67)
.14 (.53)
.28 (1.06)
.42 (1.59)
.56 (2.12)
.21 (.79)
.42 (1.59)
.62 (2.35)
.83 (3.14)
.21 (.79)
.42 (1.59)
.62 (2.35)
.83 (3.14)
Fins/Ft (cm)
2-Row
3-Row
144 (4.7)
144 (4.7)
144 (4.7)
144 (4.7)
144 (4.7)
144 (4.7)
144 (4.7)
144 (4.7)
144 (4.7)
144 (4.7)
144 (4.7)
144 (4.7)
144 (4.7)
144 (4.7)
144 (4.7)
144 (4.7)
144 (4.7)
144 (4.7)
144 (4.7)
144 (4.7)
144 (4.7)
4-Row
Reheat Coil Data (1-Row)
Hot Water or Steam
Face Area — Ft2 (cm2)
0.6
0.6
0.8
1.2
1.6
2.4
2.4
(557)
(557)
(743)
(1120)
(1490)
(2230)
(2230)
LxDxH — In. (cm)
15x1.5x6
(38x4x15)
.12 (.45)
48 (1.6)
15x1.5x6
(38x4x15)
.12 (.45)
48 (1.6)
20x1.5x6
(51x4x15)
.15 (.57)
48 (1.6)
29.5x1.5x6
(75x4x15)
.22 (.83)
48 (1.6)
38x1.5x6
(97x4x15)
.28 (1.06)
48 (1.6)
57x1.5x6
(145x4x15)
.42 (1.59)
48 (1.6)
57x1.5x6
(145x4x15)
.42 (1.59)
48 (1.6)
Volume — Gal. (Liters)
Fins/Ft (cm)
Fan/Motor Data
Fan Quantity
1
1
1
2
2
3
3
Size — Dia” x Width” (cm)
6.31x4
(16x10)
6.31x6.5
(16x17)
6.31x7.5
(16x19)
6.31x6.5
(16x17)
6.31x7.5
(16x19)
(1) 6.31x7.5
(16x19)
(2) 6.31x6.5
(16x6.5)
2
6.31x7.5
(16x19)
Size — Dia” x Width” (cm)
Motor Quantity
Filter Data
1
1
1
1
1
2
1” (cm) TA and Pl. Media
Quantity
Size — In. (cm)
1
1
1
1
1
1
1
87/8 x 191/8
(23x49)
87/8 x 191/8
(23x49)
87/8 x 241/8
(23x61)
87/8 x 335/8
(23x85)
87/8 x 421/8
(23x107)
87/8 x 611/8
(23x155)
87/8 x 611/8
(23x155)
1” Fresh Air Filter (only on cabinet styles D, E, and H with bottom return and fresh air opening)
Quantity
Size — In. (cm)
(14 x 49)
1
1
1
1
1
1
1
51/2 x 191/8
(14 x 49)
51/2 x 191/8
(14 x 61)
51/2 x 241/8
(14 x 85)
51/2 x 335/8
(14 x 107)
51/2 x 421/8
(14 x 156)
51/2 x 611/8
(14 x 156)
51/2 x 611/8
Table I-GI-2. Low vertical fan-coil component data
unit size
03
04
06
Coil Data
Face Area — Ft2 (cm2)
LxDxH — In. (cm)
2-Row
1.1 (1020)
1.6 (1490)
2.1 (1950)
20x1.7x8 (51x4x20)
20x2.6x8 (51x7x20)
29.5x1.7x8 (75x4x20)
29.5x2.6x8 (75x7x20)
38x1.7x8 (97x4x20)
38x2.6x8 (97x7x20)
3-Row
Volume — Gal. (Liters)
1-Row (Heat)
2-Row
.08 (.30)
.15 (.57)
.23 (.87)
.11 (.42)
.22 (.83)
.33 (1.25)
.14 (.53)
.28 (1.06)
.42 (1.59)
3-Row
Fins/Ft
2-Row
3-Row
144 (4.7)
144 (4.7)
144 (4.7)
144 (4.7)
144 (4.7)
144 (4.7)
Fan/Motor Data
Fan Quantity
Size — Dia”x Width” (cm)
Motor Quantity
Filter Data
1
1
1
5x23 (13x59)
1
5x32 (13x83)
1
5x41 (13x105)
1
1” (2.5 cm) TA
Quantity
Size — In. (cm)
1
1
1
87/8x241/8 (23x61)
87/8x335/8 (23x85)
87/8 x 421/8 (23x107)
UNT-SVX07A-EN
7
general
Installation
inform ation
Available Models
m odel B vertical cabinet
m odel C horizontal concealed
m odel A vertical concealed
m odel E horizontal recessed
m odel F wall hung cabinet
m odel D horizontal cabinet
m odel K low vertical cabinet
m odel H vertical recessed
m odel L low vertical concealed
m odel M inverted vertical cabinet
m odel N inverted vertical recessed
m odel J slope-top cabinet
(Force Flo only)
(Force Flo only)
8
UNT-SVX07A-EN
general
Installation
inform ation
Factory-Installed Piping Packages
Note: This figure shows piping package components and basic arrangement. It is not
an accurate pictorial of what factory-installed piping packages look like.
UNT-SVX07A-EN
9
dim ensions
& w eights
Installation
Vertical Concealed, Model A
Vertical Concealed Unit Dimensions & weights, in-lbs.
Unit
Size
A
B
C
D
E
02-03
04
06
08
10-12
2’-8 11/16” 3’-1 11/16” 3’-11 3/16” 4’-7 11/16” 6’-2 11/16”
1’-9 5/16” 2’-2 5/16” 2’-11 13/16” 3’-8 5/16” 5’-3 5/16”
1’-10 13/16” 2’-3 13/16” 3’-1 5/16” 3’-9 13/16” 5’-4 13/16”
1’-5 5/16” 1’-10 5/16” 2’-7 13/16” 3’-4 5/16” 4’-11 5/16”
1’-7 5/16” 2’-0 5/16”
2’-9 13/16” 3’-6 5/16” 5’-1 5/16”
operating weight
shipping weight
81
68
109
96
139
123
147
131
200
182
Notes:
1. Coil connections are always on the drain pan side and opposite the control
box.
5
2. Coil connections are
/8” O.D. sweat. See pages 21-22 for locations.
3. All duct collar dim ensions are to the outside of the collar.
4. See fresh air opening dim ensions on pages 23-24.
10
UNT-SVX07A-EN
dim ensions
& w eights
Installation
Vertical Cabinet, Model B
Vertical Cabinet Unit Dimensions, in-lbs.
unit
size
A
B
C
02-03
04
06
08
10-12
2’-9 5/16”
3’-2 5/16” 3’-11 3/16” 4’-8 5/16” 6’-3 5/16”
1’-9 5/16”
2’-2 5/16” 2’-11 3/16” 3’-8 5/16” 5’-3 5/16”
5
1
7
1
5
7
/8
”
7
/8
”
8
/8
”
7
/8
”
7
/8
”
D
E
F
1’-6”
2’-0”
2’-6”
3’-6”
5’-0”
1’-7 5/16”
2’-0 5/16” 2’-9 13/16” 3’-6 5/16” 5’-1 5/16”
3’-5 5/16” 3’-10 5/16” 4’-7 3/16” 5’-4 5/16” 6’-11 5/16”
operating weight 97
shipping weight 84
125
112
155
139
164
148
218
200
Notes:
1. Coil connections are always on the drain pan side and opposite the control box.
5
2. Coil connections are /8” O.D. sweat. See pages 21-22 for locations.
3. All duct collar dim ensions are to the outside of the collar.
4. See pages 23-24 for fresh air opening dim ensions.
11
dim ensions
& w eights
Installation
Horizontal Concealed, Model C
Horizontal Concealed Unit Dimensions, in-lbs.
unit
size
A
B
C
D
E
02-03
04
06
08
10-12
2’-8 11/16” 3’-1 11/16” 3’-11 3/16” 4’-7 11/16” 6’-2 11/16”
1’-9 5/16” 2’-2 5/16” 2’-11 13/16” 3’-8 5/16” 5’-3 5/16”
1’-10 13/16” 2’-3 13/16” 3’-1 5/16” 3’-9 13/16” 5’-4 13/16”
3
3
7
3
3
1’-7
1’-6
/
/8
8
”
”
2’-0
/
/
8
”
”
2’-9
2’-8
/
8
”
”
3’-6
3’-5
/
8
”
”
5’-1
5’-0
/8
”
”
1
1
5
1
1
1’-11
8
/
8
/
8
/8
F
1’-7 5/16” 2’-0 5/16” 2’-9 13/16” 3’-6 5/16” 5’-1 5/16”
operating weight 81
109
96
139
123
147
131
200
182
shipping weight
68
Notes:
1. Coil connections are always on the drain pan side and opposite the control
box.
2. Coil connections are 5
/8” O.D. sweat. See pages 21-22 for locations.
3. All duct collar dim ensions are to the outside of the collar.
4. See pages 23-24 for fresh air opening dim ensions.
12
UNT-SVX07A-EN
dim ensions
& w eights
Installation
Horizontal Cabinet, Model D
Horizontal Cabinet Unit Dimensions, in-lbs.
unit
size
A
B
02-03
04
06
08
10-12
2’-9 5/16”
3’-2 5/16” 3’-11 3/16” 4’-8 5/16” 6’-3 5/16”
2’-2 5/16” 2’-11 13/16” 3’-8 5/16” 5’-3 5/16”
1’-9 5/16”
5
1
7
1
5
C
7
/8
”
7
/8
”
8
/8
”
7
/8
”
7
/8
”
D
E
F
G
H
J
1’-6”
2’-0”
2’-6”
3’-6”
5’-0”
1
1
3
1
1
1’-5
/
4
”
1’-10
/
4
”
2’-7
/4
”
3’-4
/4
”
4’-11
/
4
”
3’-5 5/16”
3’-10 5/16” 4’-7 3/16” 5’-4 5/16” 6’-11 5/16”
5
1
7
1
5
8
/8
”
8
/8”
9
/8
”
8
/8
”
8
/8
”
1’ -4”
1’-10”
2’-4”
3’-4”
4’-10”
3
3
3
3
3
1’-7
/4
”
1’-11
/
4
”
2’-7
/4
”
3’-3
/4
”
4’-11
218
200
/
4
”
operating weight 97
shipping weight
125
112
155
139
164
148
84
Notes:
1. Coil connections are always on the drain pan side and opposite the control
box.
5
2. Coil connections are
/8” O.D. sweat. See pages 21-22 for locations.
3. All duct collar dim ensions are to the outside of the collar.
4. See pages 23-24 for fresh air opening dim ensions.
UNT-SVX07A-EN
13
dim ensions
& w eights
Installation
Horizontal Recessed, Model E
Horizontal Recessed Unit Dimensions, in-lbs.
unit
size
A
B
C
D
E
F
G
H
02-03
2’-11 13/16” 3’-4 13/16” 4’-2 5/16” 4’-10 13/16” 6’-5 13/16”
1’-9 5/16” 2’-2 5/16” 2’-11 13/16” 3’-8 5/16” 5’-3 5/16”
04
06
08
10-12
1’-10 13/16” 2’-3 13/16” 3’-1 5/16” 3’-9 13/16” 5’-4 13/16”
3
3
7
3
3
1’-7
1’-6
/
/8
8
”
”
2’-0
1’-11
/
/
8
”
”
2’-9
2’-8
/
/8
8
”
”
3’-6
3’-5
/
/8
8
”
”
5’-1
5’-0
/
8
8
”
”
1
1
5
1
1
8
/
2’-8 7/16”
3’-1 7/16” 3’-10 15/16” 4’-7 7/16” 6’-2 7/16”
2’-10 5/16”
3’-3 5/16” 4’-0 13/16” 4’-9 5/16” 6’-4 5/16”
3
3
3
3
3
1’-7
/4
”
1’-11
88
78
/
4
”
2’-7
/4
”
3’-3
/4
”
4’-11
253
243
/
4
”
operating weight 78
shipping weight
128
118
139
129
68
Notes:
1. Coil connections are always on the drain pan side and opposite the control
box.
5
2. Coil connections are
/8” O.D. sweat. See pages 21-22 for locations.
3. All duct collar dim ensions are to the outside of the collar.
4. See pages 23-24 for fresh air opening dim ensions.
14
UNT-SVX07A-EN
dim ensions
& w eights
Installation
Vertical Wall Hung Cabinet, Model F
Vertical wall hung cabinet unit dimensions & weights, in-lbs.
unit
size
A
B
C
02-03
04
06
08
10-12
2’-9 5/16”
3’-2 5/16” 3’-11 13/16” 4’-8 5/16” 6’-3 5/16”
1’-9 5/16”
2’-2 5/16” 2’-11 13/16” 3’-8 5/16” 5’-3 5/16”
5
1
7
1
5
7
/8
”
7
/
8
”
8
/
8
”
7
/
8
”
7
/8
”
D
E
F
1’-6”
2’-0”
2’-6”
3’-6”
5’-0”
1’-7 5/16”
2’-0 5/16”
2’-9 13/16” 3’-6 5/16” 5’-1 5/16”
3
3
3
3
3
1’-7
/4
”
1’-11
/
4
”
2’-7
/4
”
3’-3
/4
”
4’-11
218
200
/
4
”
operating weight
shipping weight
97
84
125
112
155
139
164
148
Notes:
1. Coil connections are always on the side opposite the control box.
5
2. Coil connections are /8” O.D. sweat. See pages 21-22 for locations.
3. All duct collar dim ensions are to the outside of the collar.
4. See pages 23-24 for fresh air opening dim ensions.
UNT-SVX07A-EN
15
dim ensions
& w eights
Installation
Vertical Recessed, Model H
Vertical Recessed Unit Dimensions, in-lbs.
unit
size
A
B
C
D
E
F
G
02-03
04
06
08
10-12
2’-8 11/16” 3’-1 11/16” 3’-11 3/16” 4’-7 11/16” 6’-2 11/16”
1’-9 5/16”
2’-2 5/16” 2’-11 13/16” 3’-8 5/16” 5’-3 5/16”
1’-10 13/16” 2’-3 13/16” 3’-1 5/16” 3’-9 13/16” 5’-4 13/16”
1’-5 5/16” 1’-10 5/16” 2’-7 13/16” 3’-4 5/16” 4’-11 5/16”
1
1
3’-11”
4’-3”
5’-3”
5’-5
2’-9
/
/
2
”
”
7’-5
2’-9
/
2
2
”
”
1
1
2’-6”
2’-6”
2’-6”
2
/
3
3
3
1
1
2
/8”
2
/8
”
2
/8”
4
/8
”
4
/8
”
H
J
3’-6”
4’-0”
4’-9”
5’-3”
7’-3”
1
1
1
1
1
2’-2
/2
”
2’-2
/2
”
2’-2
128
118
/
2
”
2’-3
139
129
/
2
”
2’-3
253
243
/
2
”
operating weight 78
shipping weight
88
78
68
Notes:
1. Coil connections are always on the drain pan side and opposite the control
box.
2. Coil connections are 5
/8” O.D. sweat. See pages 21-22 for locations.
3. All duct collar dim ensions are to the outside of the collar.
4. See pages 23-24 for fresh air opening dim ensions.
5. Dim ension 'G' refers to the required m inim um distance between the finished
floor, and the bottom of the unit.
16
UNT-SVX07A-EN
dim ensions
& w eights
Installation
Vertical Slope Top, Model J
Vertical Slope Top Unit Dimensions, in-lbs.
unit
size
A
B
02-03
04
06
08
10-12
2’-9 5/16”
3’-2 5/16” 3’-11 13/16”
4’-8 5/16”
6’-3 5/16”
1’-9 5/16”
2’-2 5/16” 2’-11 13/16”
3’-8 5/16”
5’-3 5/16”
5
1
7
1
5
C
7
/8
”
7
/8
”
8
/8
”
7
/8
”
7
/8
”
D
E
F
1’-6”
2’-0”
2’-6”
3’-6”
3’-6 5/16”
5’-4 5/16”
164
5’-0”
5’-1 5/16”
6’-11 5/16”
218
1’-7 5/16”
2’-0 5/16”
2’-9 13/16”
3’-5 5/16” 3’-10 5/16” 4’-7 13/16”
operating weight 97
shipping weight
125
112
155
139
84
148
200
Notes:
1. Coil connections are always on the drain pan side and opposite the control box.
5
2. Coil connections are /8” O.D. sweat. See pages 21-22 for locations.
3. All duct collar dim ensions are to the outside of the collar.
4. See pages 23-24 for fresh air opening dim ensions.
UNT-SVX07A-EN
17
dim ensions
& w eights
Installation
Low Vertical Concealed, Model K
Low Vertical Concealed Unit Dimensions, in-lbs.
unit size
A
B
C
D
E
03
04
06
3’-5 7/16”
4’-2 15/16” 4’-11 7/16”
1
3
1
2’-2
/4
”
2’-11
/4
”
3’-8
/
4
”
2’-3 15/16”
3’-0 13/16” 3’-9 15/16”
1’-10 5/16”
2’-7 13/16” 3’-4 5/16”
1
3
1
2’-0
/4
”
2’-9
139
123
/4
”
3’-6
147
131
/
4
”
operating weight
shipping weight
109
96
Notes:
1. Coil connections are always on the drain pan side and opposite
the control box.
2. Coil connections are
5
/8” O.D. sweat.
3. All duct collar dim ensions are to the outside of the collar.
4. See pages 23-24 for fresh air opening dim ensions.
18
UNT-SVX07A-EN
dim ensions
& w eights
Installation
Low Vertical Cabinet, Model L
Low Vertical Cabinet Unit Dimensions, in-lbs.
unit
size
A
B
C
03
04
06
3’-10 15/16” 4’-8 7/16” 5’-4 15/16”
1
3
1
2’-2
/
4
”
2’-11
1’-1 5/16”
/4
”
3’-8
/
4”
11 7/16”
11 7/16”
D
E
2’-0”
2’-6”
3’-6”
1
3
1
2’-0
/4
”
2’-9
/4
”
3’-6
/4
”
operating weight
shipping weight
125
112
155
139
164
148
Notes:
1. Coil connections are always on the drain pan side and
opposite the control box.
5
2. Coil connections are
/
8” O.D. sweat.
3. All duct collar dim ensions are to the outside of the collar.
4. See pages 23-24 for fresh air opening dim ensions.
UNT-SVX07A-EN
19
dim ensions
& w eights
Installation
Inverted Vertical Cabinet, Model M
Inverted vertical cabinet unit dimensions & weights, in-lbs.
unit
size
A
B
C
02-03
04
06
08
10-12
2’-9 5/16”
3’-2 5/16”
3’-11 13/16”
4’-8 5/16”
6’-3 5/16”
1’-9 5/16”
2’-2 5/16”
2’-11 13/16”
3’-8 5/16”
5’-3 5/16”
5
1
7
1
5
7
/8
”
7
/8
”
8
/8
”
7
/8
”
7
/8
”
D
E
F
G
1’-6”
2’-0”
2’-6”
3’-6”
5’-0”
1
1’-7”
2’-0”
2’-9
/
/4
2
”
”
3’-6”
5’-1”
3
3
3
3
3
1’-7
8
/
4
”
1’-11
/
4
”
2’-7
3’-3
8
/
4
”
4’-11
/
4
”
5
1
7
1
5
/
8
”
8
/
8”
9
/8
”
/
8
”
8
/
8
”
H
1’-4”
97
84
1’-10”
125
112
2’-4”
155
139
3’-4”
164
148
4’-10”
218
200
operating weight
shipping weight
Notes:
1. Coil connections are always on the side opposite the control box.
5
2. Coil connections are /8” O.D. sweat. See pages 21-22 for locations.
3. All duct collar dim ensions are to the outside of the collar.
4. See pages 23-24 for fresh air opening dim ensions.
20
UNT-SVX07A-EN
dim ensions
& w eights
Installation
Inverted Vertical Recessed, Model N
Inverted vertical recessed unit dimensions & weights, in-lbs.
unit
size
A
B
C
D
E
F
G
02-03
04
06
08
10-12
7
7
3
7
7
2’-3
/
8
”
2’-8
/
8
”
3’-6
/
8
”
4’-2
/
8
”
5’-9
5’-3 5/16”
3’-9 13/16” 5’-4 13/16”
/8
”
1’-9 5/16”
2’-2 5/16”
2’-11 13/16” 3’-8 5/16”
1’-10 13/16”
2’-3 13/16”
3’-1 5/16”
3
3
3
1
1
2
/8
”
2
/8
”
2
/8
”
4
/
8
”
/
/
/
4
/
8
”
/2
/2
/2
1
1
1
1
1
1
3’-11”
4’-3”
2’-6”
5’-3”
2’-6”
5’-5
2’-9
2’-3
2
”
”
”
7’-5
2’-9
2’-3
”
”
”
2’-6”
2
1
1
1
2’-2
/2
”
2’-2
/
4’-0”
88
2
”
2’-2
/
4’-9”
128
2
”
2
H
3’-6”
78
68
5’-3”
139
129
7’-3”
253
243
operating weight
shipping weight
78
118
Notes:
1. Coil connections are always on the side opposite the control box.
5
2. Coil connections are /8” O.D. sweat. See pages 21-22 for locations.
3. All duct collar dim ensions are to the outside of the collar.
4. See pages 23-24 for fresh air opening dim ensions.
Dimension 'D' refers to the required
minimum distance between the finished
floor, and the bottom of the unit.
UNT-SVX07A-EN
21
dim ensions
& w eights
Installation
Fan-Coil
Coil Connections
Vertical Units
Fan-Coil
Coil Connections
Horizontal Units
22
UNT-SVX07A-EN
dim ensions
& w eights
Installation
Force Flo
Coil Connections,
Vertical Units
Force Flo
Force Flo
Coil Connections,
Inverted Units
Coil Connections,
Horizontal Units
HR - Hot Water Return
HS - Hot Water Supply
UNT-SVX07A-EN
23
dim ensions
& w eights
Installation
Fresh Air Opening Locations
Horizontal Units Models C, D, and E
Fresh Air Opening Dimensions, Horizontal Units
Unit
Size
A
B
02-03
1’-6”
04
1’-11”
06
2’-8
08
3’-5”
10-12
5’-0”
5’-3 5/16”
1
/2
”
1’-9 5/16” 2’-2 5/16” 2’-11 13/16” 3’-8 5/16”
24
UNT-SVX07A-EN
dim ensions
& w eights
Installation
Fresh Air Opening Locations
Vertical Units Models A, B, F, & J
WALL HUNG
Fresh Air Opening Dimensions, Vertical Units
Unit
Size
A
B
02-03
1’-6”
04
1’-11”
06
2’-8
08
3’-5”
10-12
5’-0”
5’-3 5/16”
1
/2
”
1’-9 5/16” 2’-2 5/16” 2’-11 13/16” 3’-8 5/16”
UNT-SVX07A-EN
25
dim ensions
& w eights
Installation
Wall Box
CONTINUOUS
MORTAR RIBS
TOP AND
Wall Box Dimensions
Unit Size
Ref. Only
02 - 03
04
Dimensions
A x B
Internal
Supports
BOTTOM
3
3
24
24
/
/
x 4
x 7
7
/
1
1
2
3
4
8
4
3
1
/
2
8
1
06
08
33 1/8 x
/
/
1
1
1
”
2
8
1
1
”
37
58
/
x 7
x 7
/
2
2
/
8
1
10 -12
/
4
/
1
2
”
/
2
3
”
/
4
1
”
/
2
3
”
1 /8
1
”
/
8
”
4
WOVENALUMINUM
INSECTSCREEN
CLEARANCE
FOR DRAINAGE
5
”
ADDITIONAL INTERNAL
SUPPORTS EQUALLY SPACED.
NOT TO EXCEED 12” O.C.
/
8
CONTINUOUS DRIP LIP
TOP AND BOTTOM
26
UNT-SVX07A-EN
dim ensions
& w eights
Installation
Projection Panel
Projection Panel Dimensions
Unit
Size
A
B
02 - 03
3’-11”
2’-6”
04
4’-3”
2’-6”
06
5’-3”
2’-6”
08
5’-5
2’-9
10 - 12
1
1
1
/
/2
2
”
”
7’-5
2’-9
/
/2
2
”
”
1
UNIT TO WALL — TOP VIEW
Projection Panel, All Unit Sizes
C
D
E
2”
1
8
2
1
8
1/2” 3”
3
2
7
1/2” 4”
4
3
6
1/2” 5”
5
4
5
1/2” 6”
1/8“
5/8“
5/8“
1/8“
2
7
1/8“
5/8“
5/8“
1/8“
3
6
1/8“
5/8“
5/8“
1/8“
4
5
1/8“
5/8“
5/8“
1/8“
5
4
1/8“
5/8“
FRONT VIEW ISO
REAR VIEW ISO
UNT-SVX07A-EN
27
pre-installation
considerations
Installation
Installation Preparation
!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.
!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.
WARNING
Before installing the unit, consider the
following unit location recommendations
to ensure proper unit operation.
1. Clearances: Allow adequate service
and code clearances as recommended
in “Service Access” section. Position
the unit and skid assembly in its final
location.
2. Structural support: Ensure the
structural support is strong enough to
adequately support the unit. The
installer is responsible for supply
support rods for installation of ceiling
units.
3. Level: 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.
Ha za rd o u s Vo lt a g e w /Ca p a c it o rs !
Disconnect all electric power, including
rem ote disconnects and discharge all
m otor start/run capacitors before
servicing. Follow proper lockout/
tagout procedures to ensure the
power cannot be inadvertently
energized. For variable frequency
drives or other energy storing
com ponents provided by Trane or
others, refer to the appropriate
m anufacturer’s literature for allowable
waiting periods for discharge of
capacitors. Verify with an appropriate
voltm eter that all capacitors have
discharged. Failure to disconnect
power and discharge capacitors
before servicing could result in death
or serious injury.
4. Condensate line & piping: Consider coil
piping and condensate drain
Receiving and Handling
requirements. Verify condensate line is
continuously pitched 1 inch per 10 feet
of condensate line run to adequately
drain condensate.
5. Wall & ceiling openings: Vertical
recessed/concealed units require wall/
ceiling openings. Refer to submittal for
specific dimensions before attempting
to install. Horizontal recessed/concealed
units must meet the requirements of
the National Fire Protection Association
(NFPA) Standard 90A or 90B
concerning the use of concealed ceiling
spaces as return air plenums. Refer to
the submittal for specific dimensions of
ceiling openings.
6. Exterior: Touch up painted panels if
necessary. If panels need paint, sanding
is not necessary. However, clean the
surface of any oil, grease, or dirt
residue so the paint will adhere.
Purchase factory approved touch up
epoxy paint from your local Trane
Service Parts Center and apply.
Upon delivery, inspect all components for
possible shipping damage. See the
Receiving Checklist section for detailed
instructions. Trane recommends leaving
units and accessories in their shipping
packages/skids for protection and ease of
handling until installation.
Shipping Package
UniTrane fan-coil and Force Flo cabinet
heaters ship in individual cartons for
handling and storage ease. Each carton
has tagging information such as the
model number, sales order number, serial
number, unit size, piping connections, and
unit style to help properly locate the unit
in the floor plan. If specified, the unit will
ship with tagging designated by the
customer.
Jobsite Storage
This unit is intended for indoor use only.
Store the unit indoors to protect the unit
from damage due to the elements. If
indoor storage is not possible, make 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
Receiving Checklist
Complete the following checklist
immediately after receiving unit shipment
to detect possible shipping damage.
!
Inspect individual cartons before
accepting. Check for rattles, bent carton
corners, or other visible indications of
shipping damage.
excessive moisture condensation and
equipment damage.
28
UNT-SVX07A-EN
pre-installation
considerations
Installation
Service Access
Service access is available from the front
on vertical units and from the bottom on
horizontal units. Cabinet and recessed
units have removable front or bottom
panels to allow access into the unit. See
Figure I-PC-1 for recommended service
and operating clearances.
24"
12"
both sides
8.5"
both sides
Units have either right or left hand piping.
Reference piping locations by facing the
front of the unit (airflow discharges from
the front). The control panel is always on
the end opposite the piping.
3"
m odel A, vertical concealed
m odel K, low vertical concealed
m odel H, vertical recessed
m odel B, vertical cabinet
m odel L, low vertical cabinet
The fan board assembly and main drain
pan are easily removable for cleaning.
See the“Maintenance” section for more
details on servicing.
36"
Pre-Installation Checklist
Complete the following checklist before
beginning unit installation.
12"
both sides
8.5"
both sides
24"
front discharge
!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 accessory weights. See the
Dimensions and Weights section. Level
or repair the floor before positioning the
unit if necessary.
28"
28"
m odel C, horizontal concealed
m odel E, horizontal recessed
m odel D, horizontal cabinet
!Allow minimum recommended
clearances for routine maintenance and
service. Refer to unit submittals for
dimensions.
Figure I-PC-1. Recommended service clearances
!Allow one and one half fan diameters
above the unit before the discharge
ductwork makes any turns.
UNT-SVX07A-EN
29
m echanical
Installation
requirem ents
Duct Connections
Note: Do not run screws through the
removable front panel on concealed
units.
Connecting field piping to coil
1. Remove the auxiliary drain pan, if it is
in place, to prevent exposureto
dripping solder or excessive
temperatures.
Install all air ducts according to National
Fire Protection Association standards for
the Installation of Air Conditioning and
Ventilating Systems (NFPA 90A and 90B).
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).
Ductwork Recommendations
Follow the general recommendations
listed below when installing
2. Slide a 1/2-inch sweat connection
coupling (installer provided) onto the
coil headers.
ductwork for the unit.
1. Discharge ductwork should run in a
straight line, unchanged in size or
direction, for a minimum equivalent
distance of three fan diameters from
the unit (approximately 20 inches).
2. When making duct turns and
transitions avoid sharp turns and use
proportional splits, turning vanes, and
air scoops when necessary.
Note: For vertical fan-coil units, push the
main condensate drain hose and
overflow condensate drain hose through
the inside of the chassis end panel to
prevent them from getting burned when
making sweat connections. Be sure to
pull the hoses back through and route to
the auxiliary drain pan when the end
panel has cooled.
WARNING Ha za rd o u s
Vo lt a g e w /Ca p a c it o rs ! Disconnect
all electric power, including rem ote
disconnects and discharge all m otor
start/run capacitors before servicing.
Follow proper lockout/tagout
procedures to ensure the power
cannot be inadvertently energized.
For variable frequency drives or other
energy storing com ponents provided
by Trane or others, refer to the
appropriate m anufacturer’s literature
for allowable waiting periods for
discharge of capacitors. Verify with an
appropriate voltm eter that all
capacitors have discharged. Failure to
disconnect power and discharge
capacitors before servicing could
result in death or serious injury.
3. When possible, construct, and orient
supply ductwork turns in the same
direction as the fan rotation.
3. Solder the joint using bridgit lead-free
solder (ASTM B32-89) to provide a
watertight connection. Avoid
overheating factory soldered joints
when soldering field connections to the
coil to prevent leakage from occurring.
4. Insulate all piping to coil connections as
necessary after connections are
complete.
Piping Considerations
Hydronic Coil Piping
Before installing field piping to the coil,
consider the following .
5
• All coil connections are /8-inch O.D. (or
1/2-inch nominal) female copper
connections.
Note: Maintain a minimum distance of
one foot between the reduction fitting for
• The supply and return piping should not
interfere with the auxiliary drain pan or
condensate line. See “Connecting the
Condensate Drain” section for more
detailed information.
• The installer must provide adequate
piping system filtration and water
treatment.
1
the /2-inch diameter line and the fan-coil
unit piping connections.
5. Install the optional auxiliary drain pan,
which ships in the accessory packet.
• Exterior condensate may be an issue
(fan-coils only) if field piping does not
have a control valve. Refer to the
supply and return header locations in
the “Dimensions and Weights” section.
The unit’s airflow configuration varies
dependent on the model and options
ordered. A one-inch duct collar is
provided on units with a ducted return
and/or discharge to attach ductwork to
the unit.
Note: When using a field supplied piping
package in a fan-coil unit, allow sufficient
room to install the auxiliary drain pan. In
addition, piping package must not extend
over edges of auxiliary drain pan.
Trane recommends using galvanized
sheet metal ductwork with fan-coil and
cabinet heater units. Slide the sheetmetal
duct over the duct collar flange of the unit,
seal the joint and fasten with sheetmetal
screws.
30
UNT-SVX07A-EN
m echanical
Installation
requirem ents
Water Piping Connections to Factory-
Installed Piping Package
3. Slide the copper pipe over the drain
pan nipple and tighten the collar on the
pipe with a hose clamp (installer
supplied).
Automatic Changeover Sensor
Two-pipe changeover units with either
the Tracer ZN010, ZN510, and ZN520
controls have an automatic changeover
sensor that determines heating or cooling
mode based on the supply water
temperature. On units with a factory
piping package, the factory straps the
changeover sensor to the piping supply
water pipe. See Figure I-MR-3 and I-MR-
4.
Before installing water piping supply and
return lines to factory piping package,
note the following items.
Maintain a continuous drain line pitch of
one inch per ten feet of drain line run to
provide adequate condensate drainage.
Extend the drain line straight from the
drain pan a minimum distance of six
inches before making any turns. The
installer must provide proper support for
the drain line to prevent undue stress on
the auxiliary drain pan.
• All piping connections are 5/8-inch O.D.
(1/2-inch nominal) female copper
connections.
• The fan-coil supply and return piping
should not interfere with the auxiliary
drain pan or condensate line. See
“Connecting the Condensate Drain”
section for more information.
• The installer must provide adequate
piping system filtration and water
treatment.
• If the unit has a factory deluxe piping
package, the piping includes a strainer
with a 20-mesh size screen, which
allows minimal protection from debris.
Therefore, clean the strainer regularly.
If the unit does not have a factory piping
package, the factory attaches the sensor
and coiled lead wires to the piping side
end panel. The installer should attach the
sensor parallel to and in direct contact
with the supply water pipe.
Install a secondary overflow drain line if
necessary by punching out the overflow
drain nipple on the auxiliary drain pan.
3
Next, place a /8-inch inside diameter
flexible plastic tube over the nipple and
secure with a field supplied hose clamp.
Note: The installer is responsible to
ensure the changeover sensor is installed
in a location that can sense active water
temperature. Otherwise, the unit may fail
to sense the correct operating mode and
disable temperature control.
Note: The installer is responsible for
adequately insulating field piping. See the
“External Insulating Requirements
section for more information.
Note: Maintain a minimum distance of
one foot between the reduction fitting for
1
the /2-inch diameter line and the fan-coil
piping connections.
When using field supplied three-way
valves, install the changeover sensor
upstream of the valve on the supply
water pipe. When using field supplied
two-way control valves, install the
changeover sensor in a location that will
detect active water temperature. The
unit must always be able to sense the
correct system water temperature,
regardless of the control valve position.
Condensate Overflow Detection Device
The condensate overflow detection
device is an option on fan-coil units with
either a Tracer ZN010, ZN510, ZN520 or
the customer-supplied control interface.
The float switch, mounting bracket, and
coiled leads ship attached inside the
piping end pocket of the unit. Install the
switch by placing the hole or slot in the
bracket over the condensate overflow
drain (of the auxiliary drain pan) with the
switch float extending over the pan.
Secure the drain pan by attaching the
pan’s bracket with the factory
1. The factory piping package ships with
brackets to adequately support the
piping during shipment. Remove these
brackets before connecting water
piping to the unit.
2. Close the piping end valves to the fully
open position to prevent damage to the
valve seat during brazing.
3. Remove the auxiliary drain pan, if it is
in place, to prevent exposure to
dripping solder or excessive
Note: The maximum length of the
automatic changeover wire cannot
exceed ten feet from the control panel. If
the sensor extends beyond the unit
chassis, use shielded conductors to
eliminate radio frequency interference
(RFI).
temperatures.
4. Solder water piping connections to
supply and return end connections.
Avoid overheating factory soldered
joints to prevent the possibility of
leakage.
provided clip. See Figures I-MR-1 and I-
MR-2.
5. Insulate fan-coil piping to auxiliary
drain pan connections and any piping
that is not above the auxiliary drain pan.
Condensate Drain
1. De-burr the pipe end before making
the connection to the drain pan.
7
2. Connect a /8-inch O.D. copper pipe or
tube, with a 0.20 inch wall thickness, to
the auxiliary drain pan. This should be a
mechanical connection that allows easy
removal of the auxiliary drain pan
when servicing the piping end pocket.
Figure I-MR-1. Condensate float switch
installed in horizontal auxilliary drain pan.
Figure I-MR-2. Condensate float switch
installed in vertical auxilliary drain pan.
UNT-SVX07A-EN
31
m echanical
Installation
requirem ents
Automatic Electric Heat Lockout Switch
Two-pipe fan-coil units with auxiliary
electric heat have an automatic electric
heat lockout switch that disengages the
electric heat when hydronic heat enables.
If the unit has a factory piping package
and electric heat, the factory attaches the
switch to the supply water pipe. When
the lockout switch detects the supply
water temperature above 95°F, it
disengages the electric heat. This
eliminates electric heat and hydronic heat
working simultaneously.
Figure I-MR-7. Electric heat lock out switch
installed
Figure I-MR-3. Attach the changeover
sensor to the entering water pipe as shown
for changeover to work properly
If the fan-coil unit does not have a factory
piping package, the switch and coiled lead
wires ship inside the piping side end
panel. The installer should position the
lockout switch on the supply water line of
the unit by sliding its spring connector
over the pipe. See I-MR-7.
External Insulating Requirements
Insulate and vapor seal surfaces colder
than surrounding air dew-point a to
prevent unplanned condensation. Trane
recommends field-insulation of the
following areas to prevent potential
condensate problems:
1. Supply and return water piping
connections
2. Condensate drain lines and
connections
Venting the Hydronic Coil
The hydronic coil contains a vent, either
manual or automatic, to release air from
the unit. This vent is not sufficient for
venting the water piping system in the
building.
3. Fresh air intake duct connections
4. Discharge duct connections
5. Wall boxes
The coil air vent is on the piping side,
above the coil connections on the unit.
See Figure I-MR-5 and I-MR-6. Perform
the following steps to vent the coil after
installing the unit.
Figure I-MR-4. Close-up view of the
changeover sensor
1. Pressurize the building piping system
with water and vent any trapped air at
system vents.
2. For units with manual air vents, back
the set screw out to expel air from the
unit and then re-tighten the set screw.
The automatic air vent should require no
adjustment for the coil to vent. However,
if the coil does not vent immediately,
unscrew the outer portion of the fitting to
expel air from the port.
Figure I-MR-5. Manual coil air vent with set
screw
If debris has become trapped in the vent,
completely remove the outer portion of
the fitting and clean.
Figure I-MR-6. Manual coil air vent with
Shrader fitting
32
UNT-SVX07A-EN
m echanical
Installation
requirem ents
Balancing The Manual Circuit Setter
Valve
5. Adjust the circuit setter valve by
turning the valve stem until the
The manual circuit setter valve is an
optional end valve supplied on the return
pipe of the factory piping package. The
valve allows the operator to regulate
water flow through the hydronic coil,
balance the water flow through the unit
with other units in the piping system, and
serves as a shutoff or end valve. See
Figure I-MR-8.
appropriate pressure drop is achieved.
6. After achieving the proper setting,
slightly loosen the two socket head cap
screws and rotate the memory stop
around until it touches the back side of
the indicator. Then tighten the screws to
securely set the open memory position.
The memory stop indicates the last set
open position.
7. If using a three-way valve: close the
control valve to the coil, with the
differential pressure meter still
connected. This will divert flow to the
bypass side of a three-way valve.
Follow the procedure below to set
maximum water flow through the coil.
1. Establish water flow through the coil.
Perform an open override of the valve if
the control valve is closed to the coil,
either manually or by Tracer.
If the piping package has two-position,
normally closed valves: Drive open the
valve using a 24V signal.
Figure I-MR-9. Automatic circuit setter valve
Adjust the balancing fitting to obtain the
same pressure drop across the circuit
setter valve as in step two when the
control valve was open to the coil.
If the piping package has two-position,
normally open valves: Manually drive
open the valve by removing power to
the valve.
If the piping package has modulating
valves: To manually drive the valve
open, depress the button stem on top of
the valve and push the lever located on
the side of the valve to the full open
position.
Figure I-MR-10. Automatic circuit setter
valve
2. For presetting, use the appropriate
valve curve shown in Chart I-MR-1 on
page 34 to determine which setting is
necessary to achieve the appropriate
pressure drop. The “M” line is the
appropriate line.
Figure I-MR-8. Manual circuit setter valve
3. Carefully remove the Schrader
pressure port connection caps on the
manual circuit setter, since they will be
at the same temperature as the
pipeline.
4. Bleed all air from the hoses and meter
before reading the pressure drop. Refer
to the gauge operating instructions.
UNT-SVX07A-EN
33
m echanical
Installation
requirem ents
Note: Instructions for using this chart are on the previous page. For the manual
circuit setter provided with the fan-coil or Force Flo, use the 'M' line for reference.
Chart I-MR-1. Manual circuit setter valve, differential pressure vs. flow
34
UNT-SVX07A-EN
m echanical
Installation
requirem ents
Steam Piping
CAUTION
Co il Da m a g e !
In all steam coil installations, the
condensate return connections m ust
be at the low point of the coil to
ensure condensate flows freely from
the coil at all tim es. Failure to do so
m ay cause physical coil dam age from
water ham m er, unequal therm al
stresses,freeze-up and/or corrosion.
1. Make piping connections to the steam
coil as shown in Figure I-MR-11. Cap the
unused connection.
2. The coil is already pitched within the
unit to provide proper pitch to drain
condensate out of the coil. Verify that
the unit has been properly leveled.
1
3. Install a /2-inch, 15-degree swing check
vacuum breaker in the unused
condensate return tapping as close as
possible to the coil.
4. Vent the vacuum breaker line to
atmosphere or connect it into the return
main at the discharge side of the steam
trap.
5. Pitch all steam supply and return mains
down a minimum of one inch per ten
feet in the direction of flow.
6. Do not drain the steam mains or take-
off through the coils. Drain the mains
ahead of the coils through a steam trap
to the return line.
7. Overhead returns require one psig of
pressure at the steam trap discharge
for each two-feet elevation to ensure
continuous condensate removal.
8. Proper steam trap selection and
installation is necessary for satisfactory
coil performance and service life. For
installation, use the following steps:
a. Position the steam trap discharge at
least 12 inches below the condensate
return connection. This provides
sufficient hydrostatic head pressure to
overcome trap losses and ensure
complete condensate removal.
Figure I-MR-2. Typical Piping for Steam Coils
Code of System Components in Piping
Diagram
FT
Float and thermostatic steam trap
Bucket steam trap
Gate valve
Automatic two-position (on-off) control valve
Automatic three-way control valve
Vacuum breaker
Check valve
Strainer
Automatic or manual air vent
BT
GV
OV
TV
VB
CV
ST
AV
b. Trane recommends using flat and
thermostatic traps because of gravity
drain and continuous discharge
operation.
c. Use float and thermostatic traps with
atmospheric pressure gravity
condensate return, with automatic
controls or where the possibility of low
pressure supply steam exists.
d. Always install strainers as close as
possible to the trap inlet side. Reference
Figure I-MR-10 for an example of a
properly piped steam coil.
vacuum breaker (if desired)
steam supply
plugged
condensate return
Figure I-MR-11. Main steam coil connection
diagram
UNT-SVX07A-EN
35
electrical
Installation
requirem ents
Unit Wiring Diagrams
Specific unit wiring diagrams are
Note: All field wiring should conform to
NEC and all applicable state and local
code requirements. The control panel box
is always on the end opposite the piping
connections. Access the control box by
removing the two screws that secure the
front cover. This will allow the panel to be
removed, to provide access to the
electrical components.
Wall Mounted Control
Interconnection Wiring
provided inside each unit and can be
easily removed for reference.Use these
diagrams for connections or trouble
analysis. Wiring diagrams are attached
on the inside of the front panel of vertical
cabinet & recessed models and on the fan
and motor panel of vertical concealed &
all horizontal models.
The installer must provide interconnec-
tion wiring to connect wall mounted
devices such as a fan mode switch or
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 requirements.
WARNING
Supply Power Wiring
Ha za rd o u s Ele c t ric a l S h o rt s !
Insulate all power wire from sheet
m etal ground. Failure to do so m ay
cause electrical shorts that could
result in death or serious injury.
WARNING
Refer to Table I-ER-1 for the wire size
range and maximum wiring distance for
each device.
Ha za rd o u s Vo lt a g e w /Ca p a c it o rs !
Disconnect all electric power, including
rem ote disconnects and discharge all
m otor start/run capacitors before
servicing. Follow proper lockout/
tagout procedures to ensure the
power cannot be inadvertently
energized. For variable frequency
drives or other energy storing
com ponents provided by Trane or
others, refer to the appropriate
m anufacturer’s literature for allowable
waiting periods for discharge of
capacitors. Verify with an appropriate
voltm eter that all capacitors have
discharged. Failure to disconnect
power and discharge capacitors
before servicing could result in death
or serious injury.
Recommendation: 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, improper separation
may cause electrical noise problems.
Therefore, use shielded wire (Beldon
83559/83562 or equivalent) in applica-
tions that require a high degree of noise
immunity. Connect the shield to the
If the unit does not have a disconnect
switch, the power leads and capped
ground wire are inside the control panel.
If the unit has a disconnect switch, the
power leads are wired to the junction box
switch on the control panel. Pull the
capped ground wire into the junction box.
Electrical Grounding
Restrictions
chassis ground and tape at the other end.
All sensor and input circuits are normally
at or near ground (common) potential.
When wiring sensors and other input
devices to the Tracer controller, avoid
creating ground loops with grounded
conductors external to the unit control
circuit. Ground loops can affect the
Table I-ER-1. Maximum wiring distances for
low voltage controls, ft.
device
wire size
range
500
measurement accuracy of the controller.
Refer to the unit nameplate to obtain the
minimum circuit ampacity (MCA) and
maximum fuse size (MFS) or maximum
circuit breaker (MCB) to properly size field
supply wiring and fuses or circuit
breakers.
fan speed switch
zone sensor
14 - 22 AWG
16 - 22 AWG
200
CAUTION
Eq u ip m e n t Da m a g e !
Note: Do not connect any sensor or input
circuit to an external ground connection.
Unit transform er IT1 provides power
to fan-coil unit only. Field connections
to the transform er IT1 m ay create
im m ediate or prem ature unit
com ponent failure.
Refer to the unit operating voltage listed
on the unit wiring schematic, submittal, or
nameplate. Reference the wiring sche-
matic for specific wiring connections.
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.
CAUTION
Us e Co p p e r Co n d u c t o rs On ly!
Unit term inals are not designed to
accept other type conductors. Failure
to use copper conductors m ay result
in equipm ent dam age.
36
UNT-SVX07A-EN
electrical
Installation
requirem ents
Table I-ER-2. Low vertical free discharge
motors, 115 volt
Table I-ER-4. Free discharge motors on units with two-row, electric, or steam coils
unit
size
02
115 volt
FLA hp (kW)
0.6 .03 (.02)
0.7 .04 (.02)
0.9 .05 (.04)
1.2 .07 (.05)
1.4 .12 (.09)
0.9 .05 (.04)
1.2 .07 (.05)
0.9 .05 (.04)
1.4 .12 (.09)
208-230 volt
FLA hp (kW)
0.3 .03 (.02)
0.4 .04 (.02)
0.5 .05 (.04)
0.6 .07 (.05)
0.9 .12 (.09)
0.5 .05 (.04)
0.6 .07 (.05)
0.5 .05 (.04)
0.9 .12 (.09)
277-480 volt
FLA hp (kW)
0.2 .03 (.02)
0.3 .04 (.02)
0.4 .05 (.04)
0.5 .07 (.05)
0.6 .12 (.09)
0.4 .05 (.04)
0.5 .07 (.05)
0.4 .05 (.04)
0.6 .12 (.09)
rpm
M
H
L
size
03
FLA
0.7
HP (kW)
.03 (0)
RPM
1090
980 840 655
980 780 580
1050 780 580
1030 780 580
1080 800 600
1050 780 580
1030 780 580
1050 780 580
108 800 600
H
M
L
H
M
L
H
M
L
03
04
06
08
770
560
1090
750
560
1115
760
04
06
0.8
1.1
.03 (0)
.03 (0)
10
12
560
Note:
Actual rpm will vary with application and configuration.
Table I-ER-5. High static motors on units with two-row, electric, or steam coils
unit
size
02
03
04
06
08
10
115 volt
FLA hp (kW)
1.1 .07 (.05)
1.4 .08 (.06)
1.6 .10 (.07)
2.6 .16 (.12)
3.4 .24 (.18)
1.6 .10 (.07)
2.6 .16 (.12)
1.6 .10 (.07)
3.4 .24 (.18)
208-230 volt
FLA hp (kW)
0.6 .07 (.05)
0.7 .08 (.06)
0.8 .10 (.07)
1.2 .16 (.12)
1.4 .24 (.18)
0.8 .10 (.07)
1.2 .16 (.12)
0.5 .10 (.07)
0.9 .24 (.18)
277- 480 volt
FLA hp (kW)
0.5 .07 (.05)
0.6 .08 (.06)
0.7 .10 (.07)
1.0 .16 (.12)
1.1 .24 (.18)
0.7 .10 (.07)
1.0 .16 (.12)
0.7 .10 (.12)
1.1 .24 (.18)
rpm
M
1480 1110
1400 1175
1475 1315 1070
1400 1070
1475 1285
1475 1315 1070
1400 1070 855
1475 1315 1240
1475 1285 975
Table I-ER-3. Decimal to fractional HP (kW)
conversion
H
L
865
860
FC
02
Decimal
.03
Fraction
1/30
1/15
1/25
1/20
1/12
1/20
1/16
1/10
1/8
.07
855
975
03
04
.04
.05
.08
.05
12
.06
.10
.13
06
.07
.12
1/15
1/8
Table I-ER-6. Free discharge motors on units with three and four-row coils
.16
.24
.12
.13
1/6
1/4
1/8
1/8
unit
size
02
03
04
06
08
10
115 volt
FLA hp(kW)
208-230 volt
FLA hpP (kW)
0.3 .03 (.02)
0.5 .05 (.04)
0.6 .06 (.04)
0.9 .12 (.09)
1.0 .13 (.10)
0.6 .06 (.04)
0.9 .12 (.09)
0.6 .06 (.04)
1.0 .13 (.10)
277-480 volt
FLA hp (kW)
0.2 .03 (.02)
0.4 .05 (.04)
0.5 .06 (.04)
0.6 .12 (.09)
0.8 .13 (.10)
0.5 .06 (.04)
0.6 .12 (.09)
0.5 .06 (.04)
0.8 .13 (.10)
rpm
M
H
980
L
08
10
0.6
0.8
1.0
1.4
1.7
1.0
1.4
1.0
1.7
.03 (.02)
.05 (.04)
.06 (.04)
.12 (.09)
.13 (.10)
.06 (.04)
.12 (.09)
.06 (.04)
.13 (.10)
840
800
800
800
800
800
800
800
800
655
600
600
600
600
600
600
600
600
1080
1080
1080
1080
1080
1080
1080
1080
.24
1/4
.05
.07
.12
.16
.24
.12
.13
.24
.24
1/20
1/15
1/8
1/6
1/4
1/8
1/8
1/4
1/4
.06
.10
.13
.05
.06
.10
.13
1/16
1/10
1/8
1/20
1/16
1/10
1/8
12
12
low vertical
03, 04, 06
.03
1/30
Table I-ER-7. High static motors on units with three and four-row coils
unit
size
02
115 volt
hp (kW)
.07 (.05)
.08 (.06)
.13 (.10)
.24 (.18)
.24 (.18)
.13 (.10)
.24 (.18)
.13 (.10)
.24 (.18)
208-230 volt
FLA hp (kW)
0.6 .07 (.05)
0.7 .08 (.06)
0.9 .13 (.10)
1.4 .24 (.18)
1.4 .24 (.18)
0.9 .13 (.10)
1.4 .24 (.18)
0.9 .13 (.10)
1.4 .24 (.18)
277-480 volt
FLA hp (kW)
0.5 .07 (.05)
0.5 .08 (.06)
0.7 .13 (.10)
1.1 .24 (.18)
1.1 .24 (.18)
0.7 .13 (.10)
1.1 .24 (.18)
0.7 .13 (.10 )
1.1 .24 (.18)
rpm
M
Note:
FLA
1.1
1.3
2.1
3.4
3.4
2.1
3.4
2.1
3.4
H
L
865
1110
1240
975
975
1240
975
1240
975
Values for fractional HP’s (kW’s) are approximate values and
not necessarily the actual HP (kW).
1480 1110
1500 1355
1580 1375
1475 1285
1475 1285
1580 1375
1475 1285
1580 1375
1475 1285
03
04
06
08
10
12
Note: Actual rpm will vary with application and configuration. Size 10 & 12 units have two m otors.
UNT-SVX07A-EN
37
electrical
Installation
requirem ents
Table I-ER-8. Fan-coil electric heat kW
Unit Size
02
Unit Voltage
115
230
277
208
115
230
277
208
115
230
277
208
115
230
277
208
115
230
277
208
115
230
277
208
115
230
277
208
kW
1.0
1.0
1.0
0.8
1.0
1.0
1.0
0.8
kW
1.5
1.5
1.5
1.1
1.5
1.5
1.5
1.1
kW
2.0
2.0
2.0
1.5
2.0
2.0
2.0
1.5
2.0
2.0
2.0
1.5
2.0
2.0
2.0
1.5
2.0
2.0
2.0
1.5
kW
kW
kW
kW
kW
kW
kW
kW
1.9
2.5
2.5
2.5
1.9
2.5
2.5
2.5
1.9
03
04
06
08
10
12
2.3
3.0
3.0
3.0
2.3
3.0
3.0
3.0
2.3
3.0
3.0
3.0
2.3
3.0
3.0
3.0
2.3
3.0
3.0
3.0
2.3
3.0
4.0
4.0
3.0
5.0
5.0
3.8
6.0
6.0
4.5
5.3
4.0
4.0
3.0
5.0
5.0
3.8
6.0
6.0
4.5
7.0
7.0
5.3
6.0
4.0
4.0
3.0
5.0
5.0
3.8
6.0
6.0
4.5
7.0
7.0
5.3
8.0
8.0
6.0
4.0
4.0
3.0
5.0
5.0
3.8
6.0
6.0
4.5
7.0
7.0
5.3
8.0 10.0
8.0 10.0
6.0
Table I-ER-9. Electric heat kW, low vertical fan-coils
unit size
unit voltage
kW
1.0
1.0
1.0
kW
1.5
1.5
1.5
kW
kW
03
04
06
115
115
115
2.0
2.0
2.0
2.5
2.5
Low vertical units are only available with electric heat in combination with the two-row cooling coil.
Minimum Circuit Ampacity (MCA) and Maximum Fuse Size (MFS) Calculations for
Fan-Coils with Single Phase Electric Heat
Heater amps = (heater kW x 1000)/heater voltage
Note: Use 120V heater voltage for 115V units. Use 240V heater voltage for 230V 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 fan-coils with electric heat.
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
Fan-coil electric heat MBh = (heater kW) (3.413)
38
UNT-SVX07A-EN
electrical
requirem ents
Installation
Table I-ER-10. Force Flo single-stage, max kW electric heat
unit
size
heater
kW
2.25
3.0
3.0
2.25
3.0
3.0
4.5
6.0
6.0
4.5
6.0
6.0
5.7
7.5
7.5
5.7
7.5
heater
amps/ph
10.9
12.5
10.9
6.3
volts
208
240
277
208
240
480
208
240
277
208
240
480
208
240
277
208
240
480
208
240
277
208
240
480
hz
60
phase
wires
2
2
2
3
3
4
2
2
2
3
3
4
2
2
2
3
3
4
2
2
2
3
3
4
1
1
1
3
3
3
1
1
1
3
3
3
1
1
1
3
3
3
1
1
1
3
3
3
02
03
04
06
7.3
3.7
21.7
25.0
21.7
12.6
14.5
7.3
27.5
31.3
27.1
15.9
18.1
9.1
38.0
43.8
38.0
21.9
25.3
12.7
60
60
60
7.5
7.9
10.5
10.5
7.9
10.5
10.5
Note: All data based on individual units. Electric heat will operate only with fan at high speed.
Table I-ER-11. Force Flo single stage, low kW electric heat
unit size
02
voltage
# wires
kW
amps/ph
kW amps/ph
kW
amps/ph
208/60/1
240/60/1
277/60/1
2
2
2
0.75
1.0
1.0
3.7
4.2
3.7
1.5
2.0
2.0
7.3
8.4
7.3
03
04
06
08
10
12
208/60/1
240/60/1
277/60/1
208/60/3
240/60/3
480/60/3
2
2
2
3
3
4
2.25
3.0
10.9
12.5
10.9
6.3
3.0
2.25
3.0
3.0
7.3
3.7
208/60/1
240/60/1
277/60/1
208/60/3
240/60/3
480/60/3
2
2
2
3
3
4
2.25
3.0
10.9
12.5
10.9
6.3
7.3
3.7
3.0
2.25
3.0
3.0
208/60/1
240/60/1
277/60/1
208/60/3
240/60/3
480/60/3
2
2
2
3
3
4
2.25
3.0
10.9
12.5
10.9
6.3
7.3
3.7
3.3
4.5
4.5
3.3
4.5
4.5
15.9
18.8
16.3
9.2
10.9
5.5
3.0
2.25
3.0
3.0
208/60/1
240/60/1
277/60/1
208/60/3
240/60/3
480/60/3
2
2
2
3
3
4
2.25
3.0
10.9
12.5
10.9
6.3
7.3
3.7
3.3
4.5
4.5
3.3
4.5
4.5
15.9
18.8
16.3
9.2
10.9
5.5
4.5
6.0
6.0
4.5
6.0
6.0
21.7
25.0
21.7
12.5
14.5
7.3
3.0
2.25
3.0
3.0
208/60/1
240/60/1
277/60/1
208/60/3
240/60/3
480/60/3
2
2
2
3
3
4
2.25
3.0
10.9
12.5
10.9
6.3
7.3
3.7
3.3
4.5
4.5
3.3
4.5
4.5
15.9
18.8
16.3
9.2
10.9
5.5
5.7
7.5
7.5
5.7
7.5
7.5
27.5
31.3
27.1
15.9
18.1
9.1
3.0
2.25
3.0
3.0
208/60/1
240/60/1
277/60/1
208/60/3
240/60/3
480/60/3
2
2
2
3
3
4
2.25
3.0
10.9
12.5
10.9
6.3
7.3
3.7
3.3
4.5
4.5
3.3
4.5
4.5
15.9
18.8
16.3
9.2
10.9
5.5
6.6
9.0
9.0
6.6
9.0
9.0
31.8
37.5
32.5
18.4
21.7
10.9
3.0
2.25
3.0
3.0
Note: All data based on individual units. Electric heat will operate only with fan at high speed.
UNT-SVX07A-EN
39
electrical
requirem ents
Installation
Table I-ER-12. Force Flo 2-stage electric heat
unit
size
1st stage
kW
0.75
1.0
1.0
0.75
1.0
1.0
1.5
2.0
2.0
1.5
2.0
2.0
1.9
2.5
2.5
1.9
2.5
2.5
3.4
4.5
4.5
3.4
4.5
4.5
4.5
6.0
6.0
4.5
6.0
6.0
6.0
8.0
8.0
6.0
8.0
8.0
6.8
9.0
9.0
6.8
9.0
9.0
total
kW
2.25
3.0
3.0
2.25
3.0
3.0
4.5
6.0
6.0
4.5
6.0
6.0
5.7
7.5
7.5
5.7
7.5
total
amps/ph
10.9
12.5
10.9
6.3
volts
208
240
277
208
240
480
208
240
277
208
240
480
208
240
277
208
240
480
208
240
277
208
240
480
208
240
277
208
240
480
208
240
277
208
240
480
208
240
277
208
240
480
hz
60
phase
1
1
1
3
3
3
1
1
1
3
3
3
1
1
1
3
3
3
1
1
1
3
3
3
1
1
1
3
3
3
1
1
1
3
3
3
1
1
1
3
3
3
wires
2
2
2
3
3
4
2
2
2
3
3
4
2
2
2
3
3
4
2
2
2
3
3
4
2
2
2
3
3
4
2
2
2
3
3
4
2
2
2
3
3
4
02
7.3
3.7
21.7
25.0
21.7
12.6
14.5
7.3
27.5
31.3
27.1
15.9
18.1
9.1
38.0
43.8
38.0
21.9
25.3
12.7
48.8
56.3
48.8
28.2
32.5
16.3
65.0
75.0
65.0
37.6
43.3
21.7
72.3
83.4
72.3
41.7
48.2
24.1
03
04
06
08
10
12
60
60
60
60
60
60
7.5
7.9
10.5
10.5
7.9
10.5
10.5
10.1
13.5
13.5
10.1
13.5
13.5
13.5
18.0
18.0
13.5
18.0
18.0
15.0
20.0
20.0
15.0
20.0
20.0
Note: When both stages are on, the electric heat will operate only when fan is in high speed. All data based on
individual units.
40
UNT-SVX07A-EN
installation
procedure
Installation
5. Complete piping and wiring
connections.
necessary ductwork as instructed in the
following sections. Ensure that the
auxiliary drain pan is in position on fan-
coil units.
6. Install the bottom panel before starting
the unit.
7. Ensure condensate drain line is pitched
one inch per ten feet of pipe away from
the fan-coil unit.
bottom. Slide the front panel down onto
the tabs while holding the panel close as
possible to the cabinet. While the bottom
tabs are engaged, slide the front panel
upward enough to allow the top engaging
edge of the front panel to lap over the
engaging edge of the unit. This should
allow the panel to drop down and lock
into position.
Installing the Unit
Follow the procedures below to install the
unit properly. Reference the “Dimensions
and Weights” section for specific unit
dimensions and mounting hole locations.
Vertical Units
CAUTION
Ele c t ric a l Wirin g !
On recessed units, install the front panel
by aligning and locking together the
Do not allow electrical wire to fall
between the unit and installation
surface. Failure to com ply m ay result
in electrical shorts or difficulty
accessing wires.
Cabinet units
interlocking support channel of the panel
and unit. While holding the panel against
the unit, tighten the screws at the top of
the panel until it fits tight against the unit’s
front. Do not over tighten the screws.
Install the bottom panel by placing the
hinged end on the unit’s hinged end
(always at the return end of the unit).
Reference the Dimensions & Weights
section for keyslot hanger hole locations.
Swing the panel upward into position.
Secure the panel with the fasteners
provided. Do not overtighten the
fasteners.
Install vertical units in an upright position
using the 5/8-inch diameter double key slot
hanger holes, located on the back of unit.
The hanger holes allow a maximum
shank size of 5/16-inch diameter threaded
rods or lag screws (installer provides).
1. Prepare wall openings for recessed
units. Reference unit submittal for each
unit size dimensions. When installing
vertical units, consideration should be
given for units with an outside air
intake.
CAUTION
Mo t o r Ove rlo a d !
All unit panels and filters m ust be in
place prior to unit startup. Failure to
have panels and filters in place m ay
cause m otor overload.
Recessed units
Reference the Dimensions & Weights
section for mounting locations and unit
weights. Follow the procedure below and
reference Figure I-IP-1.
1. Insert the mounting bolts through the
panel brackets of the trim ring and
secure to the hanger holes on the unit.
Tighten the mounting bolts to pull the
trim ring snug against the finished
ceiling.
2. Install the bottom panel by placing the
hinged end on the trim ring hinged end
(always at the unit’s return end).
3. Adjust the expansion collar’s inner duct
(only on fan-coil units with a bottom
return) to ensure a tight fit against the
insulation located on the perimeter of
the bottom panel’s return louver.
4. Close the s-hook on each end of safety
chain assembly. Insert s-hooks through
holes in unit and door. Close s-hook on
door.
Horizontal Units
Install horizontal units suspended from
the ceiling using the four 5/8-inch diameter
double key slot hanger holes, located on
the top of the unit. The hanger holes allow
a maximum shank size of 5/16-inch
diameter threaded rods or lag screws
(installer provided). Follow the installation
procedure below.
2. If the unit has leveling legs, adjust them
correctly to level unit.
3. Mark the position of the keyslot hanger
holes on the wall according to the
dimensions given in the Dimensions &
Weights section for each unit model
and size. Align the hole locations evenly.
4. Insert the threaded rods or lag screws
in the wall before setting the unit in
place.
5. Remove the front panel (cabinet unit
only) by lifting it upward.
6. Position the hanger holes, located on
the back of the unit, over the rod or lag
screw heads, pushing the unit
downward to properly position.
7. Complete piping and wiring
Note: Follow the requirements of
National Fire Protection Association
(NFPA) Standard 90A or 90B, concerning
the use of concealed ceiling spaces as
return air plenums.
1. Prepare the ceiling opening for
recessed units. Reference the unit
submittals for dimensions.
2. Position and install the suspension rods
or a suspension device (supplied by
installer) according to the unit model
and size in the Dimensions & Weights
section.
3. On cabinet units, remove the bottom
panel by using a 5/32-inch Allen wrench
to unscrew fasteners. Swing the panel
down and lift outward.
4. Level the unit by referencing the
chassis end panels. Adjust the
suspension device.
5. Insert retaining screws through bottom
panel door and place retaining rings on
screws.
6. Swing the bottom panel upward into
position. Hook the safety chain to the
bottom panel and the unit. Tighten the
panel to the unit with the fasteners
provided.
connections, in addition to any
necessary ductwork to the unit as
instructed in the following sections.
Ensure that the auxiliary drain pan is in
position on fan-coil units.
8. Install the front panel before starting
the unit.
On cabinet units, replace the front panel
by aligning the bottom tabs on the unit
with the respective slots on the panel
UNT-SVX07A-EN
41
installation
procedure
Installation
CAUTION
Unit Leveling!
All unit panels and filters m ust be in
place prior to unit start-up. Failure to
have panels and filters in place m ay
cause m otor overload.
Note: The trim ring assembly cannot
accomodate unlevel ceilings.
Note: On sizes 8, 10, & 12 center installa-
tion position and use 2 or 3.5-inch bolts,
whichever is best suited for installation.
Also, install two safety chains assemblies
on these sizes.
Note: Expansion collar is furnished with
fan-coil with bottom return only. The
collar is not necessary for Force Flo units.
Figure I-IP-1. Installing the trim ring assembly on horizontal recessed units.
42
UNT-SVX07A-EN
installation
procedure
Installation
Wall-Mounted Control Options
Figure I-IP-4. Zone sensor with
setpoint knob, on/cancel, & comm
jack.
Figure I-IP-2. Zone sensor with off/
auto/high/low fan speeds, setpoint
knob, on/cancel, and comm jack.
Figure I-IP-3. Zone sensor with on/cancel
and comm jack.
Figure I-IP-5. Zone sensor only,
Figure I-IP-6. Digital zone sensor option
UNT-SVX07A-EN
43
installation
procedure
Installation
Installing Wall Mounted
Controls
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 the rectangular
cutout for the control wiring and module
installation holes. Ensure the base is
level.
• Concealed pipes, air ducts, or chimneys
in partition spaces behind the controller.
Fan Mode Switch Installation
The fan mode switch ships loose inside
the unit accessory bag. Follow the steps
below to install the fan mode switch.
Items needed:
Reference the wall-mounted zone sensor
dimensions in Figure I-IP-6. 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.
2 x 4 electrical junction box
b. Set the base aside and make the
1. Remove the brown wire if not using a
field-supplied damper. Remove the
terminals, cut and strip wires as
required for installation.
2. Level and position a 2 x 4 electrical
junction box. Follow the instructions
given in the “Interconnection Wiring”
section and route the wires as shown in
the wiring diagram. Refer to the typical
wiring diagram or to the unit specific
diagram on the unit.
3
cutout. Then, drill two /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.
b. Pull the control wires through the
cutout. Attach the module to the wall
using the screws provided.
Before beginning installation, follow the
wiring instructions below. Also, refer to
the unit wiring schematic for specific
wiring details and point connections.
Wiring Instructions
3. Position the fan mode switch over the
junction box with the two screws
supplied.
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.
Zone Sensor Installation
Follow the procedure below to install the
zone sensor module.
5. Strip the insulation on the
interconnection wires back 0.25 inch
and connect to TB1. Screw down the
terminal blocks.
6. Replace the zone sensor cover and
adjustment knob.
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.
If installing a Tracer ZN510 or Tracer
ZN520 zone sensor, see the Tracer
Summit Communication section for more
information.
Figure I-IP-6. Wall mounted zone sensor dimensions.
44
UNT-SVX07A-EN
installation
procedure
Installation
Installation Checklist
Protection Association (N.F.P.A.)
Standard 90A or 90B concerning the
use of concealed ceiling spaces as
return air plenums. Verify correct ceiling
opening dimensions on unit submittals.
Secure the unit and any accessory items
properly to the wall or ceiling support
rods.
The following checklist is only an
abbreviated guide to the detailed
installation procedures given in this
manual. Use this list to ensure all
necessary procedures are complete. For
more detailed information, refer to the
appropriate sections in this manual.
!6. Complete all piping connections
correctly.
WARNING
!7. Check field sweat connections for
leaks and tighten the valve stem
packing, and piping pkg unions if
necessary.
!8. Install the auxiliary drain pan
properly under piping package on fan-
coil units.
!9. Complete condensate drain line
connections on fan-coil units.
!10. Pitch condensate drain line away
from fan-coil one-inch drop per ten feet
of pipe.
!11. Install automatic changeover
sensor option on the supply water line, if
applicable.
Ha za rd o u s Vo lt a g e w /Ca p a c it o rs !
Disconnect all electric power,
including rem ote disconnects and
discharge all m otor start/run
capacitors before servicing. Follow
proper lockout/tagout procedures to
ensure the power cannot be
inadvertently energized. Verify with
an appropriate voltm eter that all
capacitors have discharged. Failure to
disconnect power and discharge
capacitors before servicing could
result in death or serious injury.
!12. Install automatic electric heat
lockout switch option on the supply
water line, if applicable.
!13. Install condensate overflow switch
option correctly on the auxiliary drain
pan, if applicable.
!14. Ensure the low temperature
detection device option is correctly
installed.
!1. Inspect the unit for shipping damage.
!2. Level installation location to support
the unit weight adequately. Make all
necessary wall or ceiling openings to
allow adequate air flow and service
clearances.
!3. Ensure the unit chassis is installed
level.
!15. Complete all necessary duct
connections.
!16. Complete all interconnection wiring
for the wall mounted fan mode switch
or zone sensor per the wiring schematic
and guidelines established in the “Wall
Mounted Control Interconnection
Wiring” section.
!17. Install the wall mounted fan mode
switch, or zone sensor module options
properly.
CAUTION
Un it Le ve lin g !
The unit m ust be installed level (zero
tolerance) in both horizontal axis for
proper operation. Do not use the coil
or drain pan as the reference point
because the coil m ay be pitched and
the drain pan has an inherent positive
slope to provide proper drainage.
!18. Connect electrical supply power
according to the NEC and unit wiring
diagrams.
!19. Remove any miscellaneous debris,
such as sheetrock dust, that may have
infiltrated the unit during construction.
!20. Replace the air filter as required.
!4. Verify that wall and ceiling openins
are properly cut per the unit submittals.
!5. Verify that installation of horizontal
concealed units meets the national Fire
UNT-SVX07A-EN
45
pre-startup
Installation
requirem ents
Communication Wiring
Device Addressing
LonTalk devices are given a unique
address by the manufacturer. This
address is called a Neuron ID. Each Tracer
ZN510 and ZN520 controller can be
identified by its unique Neuron ID, which
is printed on a label on the controller’s
logic board. The Neuron ID is also
displayed when communication is
established using Tracer Summit or
Rover service tool. The Neuron ID format
is 00-01-64-1C-2B-00.
Units with Tracer ZN510 and ZN520 Only
Communications
Tracer ZN510 and ZN520 controllers are
LonTalk® devices that interface with the
Trane Tracer Summit building
management system. Reference the unit
wiring diagram or submittals.
Ground shields at each Tracer ZN510 and
ZN520, taping the opposite end of each
shield to prevent any connection be-
tween the shield and anther ground.
Refer to Trane publication, CNT-SVX04A-
EN Installation, Operation and Program-
ming Guide, for the communication
wiring diagram.
Wire Characteristics
Controller communication-link wiring
must be low capacitance, 18-gage,
shielded, twisted pair with stranded,
tinned-copper conductors. For daisy chain
configurations, limit the wire run length to
5,000 ft. Truck and branch configurations
are significantly shorter. LonTalk wire
length limitations can be extended
through the use of a link repeater.
Communication wire must conform to
the following specification:
1. Shielded twisted pair 18 AWG
2. Capacitance 23 (21-25) picofarads (pF)
per foot
3. Listing/Rating – 300V 150C NEC 725-2
(b) Class 2 Type CL2P
4. Trane Part No. 400-20-28 or equivalent,
available through Trane BAS Buying
Group Accessories catalog.
Recommended
Communication Wiring
Practices
The following guidelines should be
followed while installing communication
wire.
Note: Communication link wiring is a
shielded, twisted pair of wire and must
comply with applicable electrical codes.
• LonTalk is not polarity sensitive. Trane
recommends that the installer keep
polarity consistent throughout the site.
• Only strip away two-inches maximum of
the outer conductor of shielded cable.
• Make sure that the 24VAC power
supplies are consistent in how they are
grounded. Avoid sharing 24VAC
between LonTalk UCMs.
• Avoid over-tightening cable ties and
other forms of cable wraps. A tight tie
or wrap could damage the wires inside
the cable.
• Do not run LonTalk cable alongside or in
the same conduit as 24VAC power.
• In an open plenum, avoid lighting
ballasts, especially those using 277VAC.
• Do not use a trunk and branch
configuration, if possible. Trunk and
branch configurations shorten the
distance cable can be run.
Follow these general guidelines when
installing communication wiring on units
with 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.
Note: You do not need to observe polarity
for LonTalk communication links.
46
UNT-SVX07A-EN
pre-startup
Installation
requirem ents
Pre-Startup Checklist
Unit Location
1. Ensure the unit location is adequate for
unit dimensions, ductwork, piping, and
electrical connections.
2. Ensure access and maintenance
clearances around the unit are
adequate.
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.
Unit Mounting
1. Ensure unit is installed level.
Component Overview
1. Ensure the fan rotates freely in the
correct direction.
WARNING Ha za rd o u s
2. Ensure all unit access panels and air
grilles are in place.
Vo lt a g e w /Ca p a c it o rs !
3. Verify that a clean air filter is in place.
4. Properly set the damper position to
meet the fresh air requirement.
Disconnect all electric power,
including rem ote disconnects and
discharge all m otor start/run
Unit Piping
1. Properly vent the hydronic coil to allow
water flow through the unit.
2. Units with deluxe piping package:
Tighten unions adequately.
3. Set water flow to the unit properly if
unit piping has the circuit setter valve.
4. Check strainers (if supplied) for debris
after apply system water.
5. Install the auxiliary drain pan and route
the main drain pan hoses to the
auxiliary drain pan on vertical fan-coil
units.
6. Verify the condensate drain piping is
complete for the unit drain pan.
7. Ensure the drain pan and condensate
line are not obstructed. Remove any
foreign matter that may have fallen into
the drain pan during installation.
capacitors before servicing. Follow
proper lockout/tagout procedures to
ensure the power cannot be
inadvertently energized. For variable
frequency drives or other energy
storing com ponents provided by
Trane or others, refer to the
appropriate m anufacturer’s literature
for allowable waiting periods for
discharge of capacitors. Verify with
an appropriate voltm eter that all
capacitors have discharged. Failure
to disconnect power and discharge
capacitors before servicing could
result in death or serious injury.
Receiving
Electrical
!Inspect unit and components for
shipping damage. File damage claims
immediately with the delivering
carrier.
!Check unit for missing material. Look
for ship-with options and sensors that
may be packaged separately from the
main unit. See the “Receiving and
Handling” section.
#Check all electrical connections for
tightness.
Note: Some circumstances may require
the unit to run before building construc-
tion is complete. These operating
conditions may be beyond the design
parameters of the unit and may ad-
versely affect the unit.
!Check nameplate unit data so that it
matches the sales order requirements.
UNT-SVX07A-EN
47
Installation
startup
Tracer™ ZN510 & ZN520 Unit
Startup
sensor module to 55°F for cooling or
85°F for heating.
Refer to the Trane publication, CNT-IOP-1
Installation, Operation and Programming
Guide for Tracer ZN510 and CNT-
SVX04A-EN for Tracer ZN520. The
factory pre-programs the Tracer ZN510
and ZN520 with default values to control
the temperature and unit airflow. Use
Tracer Summit building automation
system or Rover™ software to change
the default values.
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 2-pipe fan-coil unit with an
automatic changeover sensor, the
water temperature input is appropriate
for the demand placed on the unit. For
example, cooling operation is
requested and cold water (5° lower
than room temperature) flows into the
unit.
Follow the procedure below to operate
the Tracer ZN510 or ZN520 in a stand-
alone operation:
1. Turn power on at the disconnect switch
option.
2. Position the fan mode switch to either
high, medium, low, or the auto position.
3. Rotate the setpoint dial on the zone
3. Select the correct temperature
setpoint.
Note: Select and enable zone sensor
temperature settings to prevent freeze
damage to unit.
48
UNT-SVX07A-EN
general
inform ation
Operation
General Information
The unit-mounted option operates on line
voltage. The wall mounted option is low-
voltage and has three 24-volt relays using
a factory-wired transformer and relays to
control the fan motor.
Relay Board
The relay board is a new component on
all models (except those with a unit-
mounted, line-voltage fan speed switch)
that replaces all the loose wires in the
control box. It consolidates many control
components onto one board, therefore
making it easy to troubleshoot in the field.
There is an LED on the board that
indicates when power is supplied to the
board. All connections are made to match
up only with the applicable component to,
thus prevent miswiring. Factory switches
are pre-set and locked in place with lock-
tight. The switch settings can be broken if
field-modifications are needed. However,
switches must be properly set for the unit
to operate safely and properly. See
Figure O-GI-1.
Tracer ZN010 & ZN510
Tracer ZN010 is a stand-alone device that
controls fan-coils and cabinet heaters.
Tracer ZN510 can be stand-alone or use
peer-to-peer communications.
The controller is easily accessible in the
control end panel for service. The control
end panel is on the end of the unit
opposite the piping. Reference Figure O-
GI-3.
Figure O-GI-2. Fan speed switch
Manual Fan Mode Switch
The manual fan mode switch is available
with a four-position switch (off-hi-med-lo)
allows manual fan mode selection and is
available unit or wall mounted. See
Figure O-GI-2.
Figure O-GI-1. Relay board
Figure O-GI-3. Tracer ZN010 board
UNT-SVX07A-EN
49
sequence of
operation
Operation
Fan Mode Switch Operation
Tracer ZN520 Operation
Off
Off
Fan is turned off, two-position damper
Fan is off; control valve options and fresh
air damper options close. The low air
temperature detection option is still
active.
option spring-returns closed.
Hi, Med, Lo
Fan runs continuously at the selected
speed. The two-position damper option
opens to an adjustable mechanical stop
position.
Auto
Fan speed control in the auto setting
allows the modulating (3-wire floating
point) or 2–position control valve option
and three-speed fan to work
Tracer ZN010 & ZN510
Operation
cooperatively to meet precise capacity
requirement, while minimizing fan speed
(motor/energy/acoustics ) and valve
position (pump energy, chilled water
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 medium speed and the water
valve repositions to maintain an
equivalent capacity. The reverse
sequence takes place with a decrease in
required capacity.
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. In cooling mode, the fan
cycles from off to medium and in heating
mode it cycles from off to low. When no
heating or cooling is required, the fan is
off and the fresh air damper option
closes.
Low/Med/High
The fan runs continuously at the selected
speed and the valve option will cycle to
meet setpoint.
Low/Med/High (Continuous Fan)
Fan operates continuously while control
valve option cycles to maintain setpoint
temperature. Fresh air damper option is
open.
50
UNT-SVX07A-EN
sequence of
operation
Operation
Sequence of Operation
Tracer ZN010 and ZN510
Table O-SO-1. Unit mode as related to water temperature
unit type
EWT sensor required?
coil water temperature
2-pipe changeover
4-pipe changeover
yes
yes
COOLS if: space temp - EWT ≥ 5°F
Note: this section applies only to units
with a Tracer ZN010 or ZN510 controller.
HEATS if: EWT - space temp ≥ 5°F
COOLS if: space temp - EWT ≥ 5°F
HEATS if: EWT - space temp≥ 5°F
Power-Up Sequence
2-pipe heating only
2-pipe cooling only
no
no
hot water assumed
cold water assumed
When 24 VAC power is initially applied to
the Tracer ZN010 or ZN510, the following
sequence occurs:
4-pipe heat/cool
no
cold water assumed in main coil
hot water assumed in aux. coil
1. All outputs are controlled off.
2. Tracer ZN010 and ZN510 reads all
input values to detemine initial values.
3. The random start time (0-25 seconds)
expires.
Binary Inputs
BIP3: Occupancy Sensor
Binary input #3 (BIP3) on Tracer ZN010
and ZN510 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 normally closed.
Reference Table O-SO-2.
BIP1: Low Temperature Detection
Option
The factory hard wires the low
temperature detection sensor to binary
input #1 (BIP1) on the Tracer ZN010 and
ZN510. The sensor defaults normally
closed (N.C.), and will trip off the unit on a
low temperature diagnostic when
detecting low temperature. In addition,
the Tracer ZN010 and ZN510 control unit
devices as listed below:
4. Normal operation begins.
Entering Water Temperature Sampling
Function
Both Tracer ZN010 and ZN510 use an
entering water temperature sampling
function to test for the correct water
temperature for the unit operating mode.
For all applications not involving
changeover, the water temperature does
not affect unit operation.
Binary Outputs
Reference Table O-SO-3 for the Tracer
ZN010 and ZN510’s six binary outputs.
fan: off
valves: open
electric heat: off
damper: closed
The entering water temperature sam-
pling function opens the main hydronic
valve, waits no more than three minutes
to allow the water temperature to
stabilize, then measures the entering
water temperature to see if the correct
water temperature is available.
Table O-SO-3. Binary outputs
binary output
BOP1
description
pin
fan high speed
J1-1
J1-2
J1-4
J1-5
J1-6
J1-7
Note: See the “Diagnostics” section for
more information.
BOP2
fan medium speed
fan low speed
BOP3
BOP4
main valve
BIP2: Condensate Overflow Detection
Option
BOP5
auxiliary valve/electric heat
2-position fresh air damper
The entering water must be five degrees
or more above the space temperature to
allow hydronic heating and five degrees
or more below the space temperature to
allow hydronic cooling.
BOP6
The factory hard wires the condensate
overflow sensor to binary input #2 (BIP2)
on the Tracer ZN010 and ZN510. The
sensor defaults normally closed (N.C.),
and will trip off the unit on a condensate
overflow diagnostic if condensate
reaches the trip point. In addition, the
Tracer ZN010 and ZN510 control unit
devices as listed below:
Notes:
1. In a four-pipe application, BOP4 is used for cooling and
BOP5 is used for heating.
2. If no valves are ordered with the unit, the factory default
for the Tracer ZN010 and ZN510 controller are:
BOP4 configured as norm ally closed
BOP5 configured as norm ally open
3. If the fresh air dam per option is not ordered on the unit,
BOP6 will be configured as none.
If the correct water temperature is
available, the unit begins normal heating
or cooling operation. If the measured
entering water temperature is too low or
high, the controller closes the valve and
waits 60 minutes before attempting to
sample the entering water. Reference
Table O-SO-1.
fan: off
valves: closed
electric heat: off
Table O-SO-2. Occupancy sensor state table
sensor type
sensor position
open
unit occupancy mode
occupied
normally open
normally open
closed
unoccupied
normally closed open
normally closed closed
unoccupied
occupied
UNT-SVX07A-EN
51
sequence of
operation
Operation
Analog Inputs
Table O-SO-4. Analog inputs
Both Tracer ZN010 and ZN510 accept a
maximum of five analog inputs.
Reference Table O-SO-4.
analog input
description
application
zone
space temperature
local setpoint
space temperature detection
thumbwheel setpoint
set
Zone Sensors
fan
fan mode input
zone sensor fan switch
The zone sensors available with the
Tracer ZN010 and ZN510 provide up to
three different inputs
1. Space temperature measurement
(10KΩ thermistor)
2. Local setpoint
analog input 1 (AI1)
analog input 2 (AI2)
entering water temperature
discharge air temperature
entering water temperature detection
discharge air temperature detection
Notes:
1.The zone sensor, entering water tem perature sensor, and the discharge air tem perature sensor are 10KΩ therm istors.
Figure 26 provides the resistance-tem perature curve for these therm istors.
2. Zone sensor:
Wall m ounted sensors include a therm istor soldered to the sensor’s circuit board
Unit m ounted sensors include a return air sensor in the unit’s return air stream .
3. Changeover units include an entering water tem perature sensor.
3. Fan mode switch
Wall mounted zone sensors include a
thermistor as a component of the
internal printed circuit board. Unit
mounted zone sensors use a sensor
placed in the unit’s return air stream.
Table O-SO-5. Fan mode operation
heating mode
fan mode
off
cooling mode
unoccupied
off
occupied
off
occupied
off
unoccupied
off
low
low
off/high (3)
off/high (3)
off/high (3)
low
off/high (3)
off/high (3)
off/high (3)
Each zone sensor is equipped with a
thumbwheel for setpoint adjustment.
medium
high
medium
high
medium
high
Fan Mode Switch
auto
The zone sensor may be equipped with a
fan mode switch. The fan mode switch
offers selections of off, low, medium,
high, or auto.
continuous
heat default off/high (3)
cool default
off/high (3)
off/high (3)
cycling off/heat default
off/high (3)
off/cool default
Notes:
1. During the transition from off to any fan speed but high, Tracer ZN010 and ZN510 autom atically starts the fan on high
speed and runs for three seconds before transitioning to the selected speed (if it is other than high). This provides
enough torque to start all fan m otors from the off position.
Supply Fan Operation
Reference Table O-SO-5 for fan mode
operation. Reference Table O-SO-5 for
fan mode operation. Tracer ZN010 and
ZN510 will operate in either continuous
fan or fan cycling mode. The fan cycles
when the fan mode switch is placed in
auto. The fan runs continuous when
placed in the high, medium, or low
position. Use Rover, Trane’s installation
and service tool, to change auto defaults.
2. When the heating output is controlled off, Tracer ZN010 and ZN510 autom atically controls 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.
3. 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 when there is a call for heating or cooling.
The heat default is factory configured for low fan speed, and the cool default is m edium .
Table O-SO-6. Valid operating range and factory default setpoints
setpoint/parameter
default setting
85° F
valid operating range
40 to 115° F
40 to 115° F
40 to 115° F
40 to 115° F
40 to 115° F
40 to 115° F
40 to 115° F
40 to 115° F
0 to 240 sec
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
74° F
71° F
60° F
110° F
40° F
105° F
40° F
0 sec
52
UNT-SVX07A-EN
sequence of
operation
Operation
heating or cooling capacity is defined by
unit type and whether heating or cooling
is enabled or disabled. For example, if
the economizer is enabled and possible, it
will be the primary cooling capacity. If
hydronic heating is possible, it will be the
primary heating capacity.
Tracer ZN520 Sequence of
Operation
The Tracer ZN520 operates the fan in the
following modes:
1) occupied
2) unoccupied
3) occupied standby
4) occupied bypass
5) Tracer Summit with supply fan control
When the controller is in unoccupied
mode, you can press the On button on the
zone sensor to place the controller into
occupied bypass mode for the duration of
the bypass time (typically 120 minutes).
Occupancy Sources
There are four ways to control the
controller’s occupancy:
• Communicated request (usually
provided by the building automation
system or peer device)
• By pressing the zone sensor’s timed
override On button
Occupied Standby Mode
The controller can be placed into the
occupied standby mode when a
Occupied
communicated occupancy request is
combined with the local (hardwired)
occupancy binary input signal. When the
communicated occupancy request is
unoccupied, the occupancy binary input
(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.
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, 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.
• Occupancy binary input
• Default operation of the controller
(occupied mode)
A communicated request from a building
automation system or another peer
controller can change the controller’s
occupancy. However, if communication 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.
During occupied standby mode, the
controller’s economizer damper position
goes to the economizer standby mini-
mum position. The economizer standby
minimum position can be changed using
Rover service tool.
Unoccupied Mode
When the controller is in the unoccupied
mode, the controller attempts to maintain
the space temperature at the stored
unoccupied heating or cooling setpoint,
based on the measured space
temperature, the active setpoint and the
control algorithm, regardless of the
presence of a hardwired or
communicated setpoint. Similar to other
configuration properties of the controller,
the locally stored unoccupied setpoints
can be modified using Rover™ service
tool.
A communicated request can be pro-
vided to control the occupancy of the
controller. Typically, the occupancy of the
controller is determined by using time-of-
day scheduling of the building automation
system. The result of the time-of-day
schedule can then be communicated to
the unit controller.
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 TracerZN520 controller
reduces the demand for heating and
cooling the space. Also, the outdoor air
economizer damper uses the econo-
mizer standby minimum position to
reduce the heating and cooling demands.
Tracer Summit with Supply Fan Control
If the unit is communicating with Tracer
Summit and the supply fan control
programming point is configured for
Tracer (the factory configures as local),
Tracer Summit will control the fan
regardless of the fan mode switch
position.
When no occupancy request is commu-
nicated, 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.
In unoccupied mode, a simplified zone
control algorithm is run. During the
cooling mode, when the space tempera-
ture 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 the heating
mode, when the space temperature is
below the heat setpoint, the primary
heating capacity turns on. All capacity is
turned off when the space temperature is
between the unoccupied cooling and
heating setpoints. Note that primary
When the fan mode switch is set to Off or
when power is restored to the unit, all
Tracer ZN520 lockouts (latching diagnos-
tics) are manually reset. The last diagnos-
tic to occur is retained until the unit power
is disconnected. Refer to Trane publica-
tion, CNT-SVX04A-EN Tracer ZN520
Installation Operation and Programming
Guide, for specific instructions regarding
the procedure for running the Tracer
ZN520.
Occupied Bypass Mode
The controller can be placed in occupied
bypass mode by either communicating
an occupancy request of Bypass to the
controller or by using the timed override
On button on the Trane zone sensor.
UNT-SVX07A-EN
53
sequence of
operation
Operation
Cooling Operation
The heating and cooling setpoint high
and low limits are always applied to the
occupied and occupied standby
setpoints. During the cooling mode, the
Tracer ZN520 controller attempts to
maintain the space temperature at the
active cooling setpoint. Based on the
controller’s occupancy mode, the active
cooling setpoint is one of the following:
• Occupied cooling setpoint
Unit diagnostics can affect the Tracer
ZN520 controller operation, causing unit
operation to be defined as abnormal.
Refer to the Troubleshooting section for
more information about abnormal unit
operation.
The economizer is used for cooling
purposes whenever the outdoor tem-
perature is below the economizer enable
setpoint and there is a need for cooling.
The economizer is used first to meet the
space demand, and other forms of
cooling are used if the economizer cannot
meet the demand alone. See modulating
outdoor air damper operation for
additional information.
The 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 (modulating
valves) or cycled on (two-position
valves). As the load increases, modulat-
ing outputs open further and binary
outputs are energized longer. At 100%
capacity, the heating valve is fully open
(modulating valves) or on continuously
(two-position valves).
Cascade cooling control initiates a
• Occupied standby cooling setpoint
• Unoccupied cooling setpoint
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 deter-
mines a need to raise the discharge air
temperature. The controller then pro-
vides heating capacity to raise the
The controller uses the measured space
temperature, the active cooling setpoint,
and discharge air temperature 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 Tracer
ZN520 cooling outputs (modulating
hydronic valve, two-position hydronic
valve, or outdoor air economizer
discharge air temperature to its low limit.
The TracerZN520 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, medium, or low
position, the fan runs continuously at the
selected speed. Refer to the Trouble-
shooting section for more information on
abnormal fan operation.
Discharge Air Tempering
The discharge air tempering function
enables when cold outdoor air is brought
in through the outdoor air damper,
causing 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.
damper) are controlled based on the
cooling capacity output.
The 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 (modulating valves) or cycled
on (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 (modulat-
ing valves) or on continuously (and 2-
position valves).
Heating Operation
When the unit’s supply fan is set to auto,
the controller’s configuration determines
the fan speed when in the occupied mode
or occupied standby mode. The fan runs
continuously at the configured heating
fan speed or cooling fan speed. For all fan
speed selections except off, the fan
During heating mode, the TracerZN520
controller attempts to maintain the space
temperature at the active heating
setpoint. Based on the occupancy mode
of the controller, the active heating
setpoint is one of the following:
• Occupied heating
cycles off during unoccupied mode.
• Occupied standby heating
• Unoccupied heating
The economizer outdoor air damper is
never used as a source of heating.
Instead, the economizer damper (when
present) is only used for ventilation;
therefore, the damper is at the occupied
minimum position in the occupied mode.
The damper control is primarily associ-
ated with occupied fan operation.
During dehumidification in the heating
mode, the controller adjusts the heating
setpoint up to the cooling setpoint. This
reduces the relative humidity in the space
with a minimum of energy usage.
Unit diagnostics can affect fan operation,
causing occupied and occupied standby
fan operation to be defined as abnormal.
Refer to the Troubleshooting section for
more information about abnormal fan
operation.
The controller uses the measured space
temperature, the active heating setpoint,
and discharge air temperature, along
with the control algorithm, to determine
the requested heating capacity of the unit
(0-100%). The outputs are controlled
based on the unit configuration and the
required heating capacity.
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.
54
UNT-SVX07A-EN
sequence of
operation
Operation
Fan Mode Operation
Table O-SO-8. Local fan switch enabled
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, medium, or low).
When fan mode is auto, the fan operates
at the default fan speed.
For multiple fan speed applications, the
TracerZN520 controller offers additional
fan configuration flexibility. Separate
default fan speeds for heating and cooling
modes can be configured. The fan runs
continuously for requested speeds (off,
high, medium, 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
speed. See Table 21 for default fan
configuration for heat and cool mode.
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.
Communicated Fan switch (local) Fan operation
fan speed input
Off
Low
Ignored
Ignored
Off
Low
Medium
High
Ignored
Ignored
Off
Medium
High
Auto
Low
During unoccupied mode, the controller
controls the fan off. While unoccupied, the
controller heats and cools to maintain the
unoccupied heating and cooling setpoints.
In unoccupied mode, the fan is controlled
on high speed only with heating or
cooling.
Medium
High
Auto
Off
Low
Medium
High
Auto (configured default, determined by heat/cool
mode)
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 communi-
cated request, or the default fan speed
(off).
During dehumidification, when the fan is
on Auto, the fan speed can switch
depending on the error. Fan speed
increases as the space temperature rises
above the active cooling setpoint.
Table O-SO-9. Fan operation in heating and
cooling modes
Heating
Fan mode Occ. Unocc.
Cooling
Occ.
Unocc.
off
off
off
off
off
Additional flexibility built into the control-
ler allows you to enable or disable the
local fan switch input. The fan mode
request can be either hardwired or
communicated to the controller. When
both are present, the communicated
request has priority over the hardwired
input. See Tables 22, 23, and 24.
If both a zone sensor module and
communicated request exist, the commu-
nicated request has priority.
Low
low
med
high
off/high
off/high
off/high
low
med
high
off/high
off/high
off/high
Medium
High
Auto
Fan Cycling Operation
default off/high
fan sp.
default off/high
fan sp.
TracerZN520 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.
Table O-SO-10. Local fan switch disabled or
not present
Table O-SO-7. Fan configuration
Communicated fan speed input
Fan operation
Off
auto fan
operation
fan speed
default
Off
Fan Off Delay
Heating
Cooling
continuous
off
low
medium
high
Low
Low
When a heating output is controlled off,
the Tracer ZN520 controller automatically
holds the fan on for an additional 30
seconds. This 30-second delay gives the
fan time 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.
Medium
Medium
High
High
continuous
off
low
medium
high
Auto (or not present)
Auto (fan runs at
the default speed
Table O-SO-11. Relationship between outdoor temperature sensors and damper position
Outdoor Air Temp.
Modulating Outdoor Air Damper
occupied or occupied bypass
occupied standby
unoccupied
none or invalid
open to occupied minimum position
open to occupied minimum position
economizing minimum postion to 100%
open to occupied standby minimum position
open to occuied standby minimum position
closed
closed
failed
present and economizing feasible
economizing between occupied standby
minimum position to 100%
open & economizing when
unit is operating, closed
otherwise
present & economizing not feasible open to occupied minimum position
open to occupied standby minimum position
closed
UNT-SVX07A-EN
55
sequence of
operation
Operation
Fan Start on High Speed
temperature is not usable for the desired
mode, the controller continues to com-
pare the entering water temperature
against the effective space temperature
for a maximum of three minutes.
Economizer Damper Option
On a transition from off to any other fan
speed, the Tracer ZN520 controller
automatically starts the fan on high speed
and runs the fan at high speed for 0.5
seconds. This provides the ample torque
required to start all fan motors from the
off position.
With a valid outdoor air temperature
(either hardwired or communicated),
Tracer ZN520 uses the modulating
economizer damper as the highest
priority source of cooling. Economizer
operation is only possible through the use
of a modulating damper.
The controller automatically disables the
entering water temperature sampling
and closes the main hydronic valve when
the measured entering water exceeds
the high entering water temperature limit
(110°F). When the entering water
temperature is warmer than 110°F, the
controller assumes the entering water
temperature is hot because it is unlikely
the coil would drift to a high temperature
unless the actual loop temperature was
very high.
Entering Water Temperature Sampling
Function
Only units using the main hydronic coil for
both heating and cooling (2-pipe
changeover and 4-pipe changeover
units) use the entering water
temperature sampling function. Two-pipe
changeover and 4-pipe changeover
applications allow the main coil to be
used for heating and for cooling;
therefore, these applications require an
entering water temperature sensor.
Economizing is possible during the
occupied, occupied standby, unoccupied,
and occupied bypass modes.
The controller initiates the economizer
function if the outdoor air temperature is
cold enough to be used as free cooling
capacity. If the outdoor air temperature is
less than the economizer enable setpoint
(absolute dry bulb), the controller
If the entering water temperature 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 entering water
temperature is valid for heating or
cooling, it resumes normal heating/
cooling control and effectively disables
entering water temperature sampling
until it is required.
modulates the outdoor air damper
(between the active minimum damper
position and 100%) to control the amount
of outdoor air cooling capacity. When the
outdoor air temperature rises 5°F above
the economizer enable point, the control-
ler disables economizing and moves the
outdoor air damper back to its predeter-
mined minimum position based on the
current occupancy mode or communi-
cated minimum damper position.
When three-way valves are ordered with
a Tracer ZN520 control, the controller is
factory-configured to disable the entering
water temperature sampling function,
and the entering water sensor is
mounted in the proper location. Disabling
entering water temperature sampling
eliminates unnecessary water flow
through the main coil when three-way
valves are used.
Electric Heat Operation
Dehumidification
The Tracer ZN520 controller supports one
or two-stage electric heat operation for
heating. To control the space
temperature, electric heat is cycled 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
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 invokes entering water
temperature sampling only when the
measured entering water temperature is
too cool to heat or too warm to cool.
Entering water is cold enough to cool
when it is five degrees below the mea-
sured space temperature. Entering water
is warm enough to heat when it is five
degrees above the measured space
temperature.
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 dehumidify-
ing, the discharge air temperature is
controlled to maintain the space tem-
perature at the current setpoint.
economizer (if any). Two-pipe
changeover units with electric heat use
the electric heat only when hot water is
not available.
When the controller invokes the entering
water temperature sampling function, the
unit opens the main hydronic valve for no
more than three minutes before consid-
ering the measured entering water
temperature. An initial stabilization period
is allowed to flush the coil. This period is
equal to 30 seconds plus ½ the valve
stroke time. Once this temperature
stabilization period has expired, the
controller compares the entering water
temperature against the effective space
temperature (either hardwired or
Manual Fresh Air Damper
Units with the manual fresh air damper
option ship with the damper in the closed
position, which is adjustable from zero to
100% in 25% increments. To adjust the
position, first remove the air filter to
expose the damper stop screw on the
control panel end. Relocate the stop
screw to the appropriate position. Then
loosen the stop screw wingnut and
adjust the linkage.
A typical scenario involves high humidity
and high temperature load of the
space.The controller sets the cooling
capacity to 100% and uses the reheat
capacity to warm the discharge air to
maintain space temperature control.
Dehumidification may be disabled via
Tracer or configuration.
communicated) to determine whether
the entering water can be used for the
desired heating or cooling. If the water
56
UNT-SVX07A-EN
sequence of
operation
Operation
Binary Outputs
Binary outputs are configured to support
the following:
Note: If the unit is in the unoccupied
mode, the dehumidification routine will
not operate.
Note: The generic binary input can be
used with a Tracer Summit® building
automation system only.
• Three fan stages (when one or two fan
stages are present, medium fan speed
can be configured as exhaust fan)
• One hydronic cooling stage
• One hydronic heating stage
(dehumidification requires this to be in
the reheat position)
Data Sharing
Because this controller utilizes
LonWorks™ technology, the controller
can send or receive data (setpoint, heat/
cool mode, fan request, space
Each binary input default configuration
(including normally open/closed) is set at
the factory. However, you can configure
each of the four binary inputs as normally
open or normally closed. The controller
will be set properly for each factory-
supplied binary input end-device. When
no device is connected to the input,
configure the controller’s input as not
used.
temperature, etc.) to and from other
controllers on the communication link,
with or without the existence of a building
automation system. This applies to
applications where multiple unit
controllers share a single space
temperature sensor (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.
• One DX cooling stage
• One or two-stage electric heat
(dehumidification requires this to be in
the reheat position)
• Face and bypass damper
• Modulating outdoor air damper
• One baseboard heat stage
For more information, see Table O-SO-13.
Table O-SO-12. Binary input configurations
binary
input
controller operation
contact closed contact open
description
configuration
BI 1
BI 2
low temperature detection Note 1
normally closed
normally closed
normal
normal
diagnostic Note 5
condensate overflow Note 1
diagnostic Note 5
Binary Inputs
BI 3
BI 3
BI 4
occupancy
normally open
normally open
normally open
unoccupied
normal Note
normal
occupied
normal Note
diagnostic Note 4
The Tracer ZN520 controller has four
available binary inputs. See Table O-SO-
12. Normally, these inputs are 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
3
3
generic binary input
fan status Note 1
No t e
1
During low tem perature, condensate overflow, and fan status diagnostics, the Tracer ZN520 control disables all
No t e
norm al unit operation of the fan, valves, and dam per.
as an occupied/unoccupied input. However, when the controller receives a com m unicated occupied/unoccupied request,
the com m unicated request has priority over the hardwired input.
2 The occupancy binary input is for standalone unit controllers
No t e
3
The generic binary input does not affect unit
No t e
4
operation. A building autom ation system reads this input as a generic binary input.
If the fan m ode input is in the
off position or the controller is in the unoccupied m ode with the fan off, the fan status input will be open. A diagnostic
will not be generated when the controller com m ands the fan off. A diagnostic will only be generated if the fan status
input does not close after one m inute from energizing a fan output or any tim e the input is open for one m inute. The
controller waits up to one m inute after energizing a fan output to allow the differential pressure to build up across the
No t e
5
fan.
The table below shows the controller’s response to low tem perature detection, condensate overflow, and fan
status diagnostics.
Table O-SO-13. Binary output configuration
binary output
J1-1
configuration
fan high
J1-2
fan medium
J1-3
fan low
J1-4
(Key)
Note 1
J1-5
cool valve – open, or 2-position valve
Note 1
J1-6
cool valve – close
Note 1
J1-9
heat valve – open, or 2 position valve, or 1st electric heat stage
Note 1
J1-10
J1-11
J1-12
TB4-1
TB4-2
heat valve – close or 2nd Electric heat stage
fresh air damper - open
fresh air damper - close
generic / baseboard heat output
24VAC
No t e
1
For Tracer ZN520 units configured and applied as 2-pipe hydronic heat/cool changeover, term inals J 1-5 and J 1-6 are
used to control the prim ary valve for both heating and cooling. For Tracer ZN520 units configured and applied as 2-pipe
hydronic heat/cool changeover with electric heat, term inals J 1-5 and J 1-6 are used to control the prim ary valve (for both
cooling and heating), and term inals J 1-9 and J 1-10 are used only for the electric heat stage. For those 2-pipe changeover
units, electric heat will not be energized while the hydronic supply is hot (5° or m ore above the space tem perature).
UNT-SVX07A-EN
57
sequence of
operation
Operation
Table O-SO-14. Analog inputs
description
terminals
function
range
zone
ground
set
TB3-1
TB3-2
TB3-3
B3-4
space temperature input
analog ground
5° to 122°F (-15° to 50°C)
NA
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)
13177 to 13443 W (medium)
15137 to 16463 W (high)
fan
fan switch input
ground
TB3-6
analog ground
NA
analog input 1
J3-1
J3-2
entering water temperature
analog ground
-40° to 212°F (-40° to 100°C)
NA
analog input 2
analog input 3
analog input 4
J3-3
J3-4
discharge air temperature
Analog ground
-40° to 212°F (-40° to 100°C)
NA
J3-5
J3-6
fresh air temp/generic temp
Analog ground
-40° to 212°F (-40° to 100°C)
NA
J3-7
universal input
generic 4-20ma
humidity
0 – 100%
0 – 100%
0 – 2000ppm
2
CO
J3-8
J3-9
analog ground
NA
NA
ground
Notes:
analog ground
1. The zone sensor, entering water tem perature sensor, discharge air sensor, and the outside air tem perature sensor are
10KΩ thermistors.
2. Zone sensor: Wall m ounted sensors include a therm istor soldered to the sensor’s circuit board. Unit m ounted sensors
include a return air sensor in the units return air stream .
3. Changeover units include an entering water tem perature sensor.
Table O-SO-15. Analog inputs
description
terminals
function
range
zone
ground
set
TB3-1
TB3-2
TB3-3
B3-4
space temperature input
analog ground
5° to 122°F (-15° to 50°C)
NA
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)
13177 to 13443 W (medium)
15137 to 16463 W (high)
fan
fan switch input
ground
TB3-6
analog ground
NA
analog input 1
J3-1
J3-2
entering water temperature
analog ground
-40° to 212°F (-40° to 100°C)
NA
analog input 2
analog input 3
analog input 4
J3-3
J3-4
discharge air temperature
Analog ground
-40° to 212°F (-40° to 100°C)
NA
J3-5
J3-6
fresh air temp/generic temp
Analog ground
-40° to 212°F (-40° to 100°C)
NA
J3-7
universal input
generic 4-20ma
humidity
CO2
analog ground
0 – 100%
0 – 100%
0 – 2000ppm
J3-8
J3-9
NA
NA
ground
Notes:
analog ground
1. The zone sensor, entering water tem perature sensor, discharge air sensor, and the outside air tem perature sensor are
10KW therm istors.
2. Zone sensor: Wall m ounted sensors include a therm istor soldered to the sensor’s circuit board. Unit m ounted sensors
include a return air sensor in the units return air stream .
3. Changeover units include an entering water tem perature sensor.
58
UNT-SVX07A-EN
sequence of
operation
Operation
Zone Sensor
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
On/Cancel Buttons
The TracerZN520 controller accepts the
following zone sensor module inputs:
• Space temperature measurement
(10kΩ thermistor)
• Local setpoint (either internal or
external on the zone sensor module)
• Fan switch
• Timed override (On) and Cancel timed
override
• Communication jack
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.
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.
Space Temperature Measurement
Trane zone sensors use a 10kW
thermistor to measure the space
temperature. Typically, zone sensors are
wall-mounted in the room and include a
space temperature thermistor. As an
option, the zone sensor can be unit-
mounted with a separate space
temperature thermistor located in the
unit’s return air stream. If both a
hardwired and communicated space
temperature value exist, the controller
ignores the hardwired space
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 can access any controller
on the link.
When the controller is in unoccupied
mode, it always uses the stored unoccu-
pied 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 communi-
cated, hardwired, or default setpoints
without making physical changes to the
unit.
Communications
TracerZN520 controller communicates
via Trane’s LonTalk protocol. Typically, a
communication link is applied between
unit controllers and a building automation
system. Communication also is possible
via Rover, Trane’s service tool. Peer-to-
peer communication across controllers is
possible even when a building
temperature input and uses the
communicated value.
Similar to hardwired setpoints, the
effective setpoint value for a communi-
cated setpoint is determined based on
the stored default setpoints (which
determines the occupied and occupied
standby temperature deadbands) and
the controller’s occupancy mode.
External Setpoint Adjustment
Zone sensors with an external setpoint
adjustment (1kΩ) provide the Tracer
ZN520 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.
automation system is not present. You do
not need to observe polarity for LonTalk
communication links.
Fan Switch
The controller provides six 0.25-inch
quick-connect terminals for the LonTalk
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
The zone sensor fan switch provides the
controller with an occupied (and occupied
standby) fan request signal (Off, Low,
Medium, 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
fan switch input can be enabled or
disabled through configuration using the
Rover 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.
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 unoccu-
pied), the heating or cooling mode, the
temperature deadband values, and the
heating and cooling setpoints (high and
low limits) to determine the controller’s
active setpoint.
Table O-SO-16. Zone sensor wiring
connections
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
TB1
1
description
space temperature
common
When the fan switch is in the off position,
the controller does not control any unit
capacity. The unit remains powered and
all outputs drive to the closed position.
Upon a loss of signal on the fan speed
input, the controller reports a diagnostic
and reverts to using the default fan
speed.
2
3
setpoint
4
fan mode
5
communications
communications
6
UNT-SVX07A-EN
59
Maintenance
diagnostics
Diagnostics
Table M-D-1. Tracer ZN520 Diagnostics
Diagnostic
Fan
Off
Other Outputs (Note 1)
Condensate overflow
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 temp failure
Discharge air temp low limit
Discharge air temp failure
Fresh air temp failure
Relative humidity failure
Generic 4-20ma failure
CO2 Input failure
Off
Off
Off
On
Off
Off
On
On
On
On
On
On
On
Off
On
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
Valves Enabled (Note 2), Fresh air damper Enabled (Note 2),
electric heat Enabled (Note 2), 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 Enabled, Fresh air damper Minimum position3, 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
Maintenance required
Local fan mode failure
Local setpoint failure
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
Invalid unit configuration
Normal – power up
Valves Disabled, Fresh air damper Disabled, electric heat
Disabled, Baseboard heat Disabled
Valves Enabled, Fresh air damper Enabled, Electric heat Enabled
Note 1: The generic binary output (TB4-1, TB4-2) state is unaffected by all unit diagnostics.
Note 2: When the entering water tem perature is required but not present, the Tracer ZN520 controller generates a diagnostic to indicate the sensor loss condition. The
controller autom atically clears the diagnostic once a valid entering water tem perature value is present (non-latching diagnostic). When the entering water
tem perature sensor fails, the controller prohibits all hydronic cooling operation, but allows the delivery of heat when heating is required. In the Cool m ode, all cooling
is locked-out, but norm al fan and outdoor air dam per operation is perm itted.
Note 3: When the outdoor air tem perature sensor has failed or is not present, the Tracer ZN520 controller generates a diagnostic to indicate the sensor loss condition.
The controller autom atically clears the diagnostic once a valid outdoor air tem perature value is present (non-latching diagnostic). When the outdoor air tem perature
sensor fails or is not present, the controller prohibits econom izer operation.
60
UNT-SVX07A-EN
Maintenance
diagnostics
Translating Multiple Diagnostics
The controller senses and records each
diagnostic independently of other
diagnostics. It is possible to have multiple
diagnostics present simultaneously. The
diagnostics are reported in the order they
occur.
Table M-D-2. Tracer ZN510 controller diagnostics
diagnostic
latching?
no
fan
valves
elec heat damper
auxiliary
temp. failure
enabled no action no action no action
condensate
overflow
yes
no
off
closed
enabled
enabled
off
closed
detection
entering
water temp.
failure
enabled
enabled
enabled enabled
Possible diagnostics include:
• Low temperature detection
• Condensate overflow
fan mode
failure
no
enabled enabled
disabled disabled
• Low air flow - fan status
• Discharge air temp limit
• Space temperature failure1
• Entering water temp failure1
• Discharge air temp failure1
• Outdoor air temp failure1
• Local setpoint failure1
invalid unit
configuration
failure
yes
disabled disabled
low temp.
detection
yes
yes
off
open
off
closed
maintenance
required
enabled no action no action no action
enabled no action no action no action
setpoint
no
no
• Local fan mode failure1
• CO2 sensor failure1
zone temp. failure
Notes:
off
closed
off
closed
• Generic AIP failure1
• Humidity input failure1
• Defrosting compressor lockout1
• Maintenance required
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 m ultiple diagnostics
present sim ultaneously. The diagnostics affect unit operation according to priority level.
Latching: A latching diagnostic requires a m anual reset of the controller; while a non-latching diagnostic
autom atically resets when the input is present and valid.
Enabled: End device is allowed to run if there is a call for it to run.
Disabled: End device is not allowed to run even if there is a call for it to run.
No Action: The diagnostic has no affect on the end device.
• Invalid unit configuration
• Generic temperature failure
• Discharge air low limit
1 Non-latching diagnostics automatically
reset when the input is present and valid.
Cycling Power to the Controller
After the controller detects the first
special 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.
After removing and reapplying the 24
VAC power from the board, the unit
cycles through a power-up sequence. By
default, the controller attempts to reset all
diagnostics present at power-up.
Diagnostics present at power-up and
those that occur after power-up are
handled according to Table M-D-2.
Resetting Diagnostics
There are a number of ways in which
diagnostics are reset:
1. Automatic reset by the controller
2. By initiating a manual output test at the
controller
3. By cycling power to the controller
4. Through Rover™, Trane’s service tool
5. Tracer ZN520: by using any other
communicating device ab le to access
the controller’s diagnostic reset input.
6. Tracer ZN520: by cycling the fan switch
from Off to any speed setting.
Using Trane’s Service Tool, Rover™
Rover™, Trane’s service tool, can reset
diagnostics present in the controller and
troubleshoot the unit. For more
information, refer to the Trane publication
EMTX-SVX01D-EN, Rover Installation,
Operation and Programming Guide.
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.
Automatic Reset by the Controller
The controller includes an automatic
diagnostic reset function that attempts to
automatically restore the unit when a low
temperature diagnostic occurs.
Diagnostic Reset
Any device that can communicate the
network variable nviRequest
(enumeration “clear_alarm”) can reset
diagnostics in the Tracer ZN520
controller.The controller also attempts to
reset diagnostics whenever power is
cycled.
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.
Manual Output Test
To verify proper end device operation,
press the controller’s Test button. This
exercise will verify all outputs in a
predefined sequence, the first of which
will attempt to reset the controller
diagnostics if any are present.
Cycling the Fan Switch
Cycle the fan speed switch from Off to
any speed and the controller resets all
diagnostics. Diagnostics may recur
immediately if the problem still exists.
UNT-SVX07A-EN
61
diagnostics
Maintenance
Table M-D-3. Fan outputs do not energize
Probable Cause
Random start
Explanation
After power-up, the controller always observes a random start that varies observed between 0 and 25 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 postion, the unit fan cycles off when there is no call for heating or cooling. The heating/
cooling sources cycle on oroff 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 cycleson or off with heating/cooling to provide varying amounts of heating or cooling to the space. to match the
capacity 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 unitcontrols 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 effects fan operation. For more information, see the “Diagnostics” section.
No power to the
controller
If the controller does not have power, the unit fan will not operate. For the controller
controller to operate
normally, it must have an input voltage of 24 VAC. Whenthe green LED is off continuously, the controller does not have sufficient
power or the controller has failed.
Manual output test
Unit wiring
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 the “Manual Output Test” section.
The wiring between the controller outputs and the fan relays and contacts must be present and correct for normal fan operation.
Refer to the typical unit wiringdiagrams in the Appendix of this manual.
Table M-D-4. Valves Stay Closed
Probable Cause
Explanation
Normal operation
Requested mode: off
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 unitcontrols 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 effects 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 thecurrent step in the test sequence, the valves may not be open. Refer to the “Manual Output Test” section.
Diagnostic present
Sampling logic
A specific list of diagnostics affects valve operation. For more information, see the “Diagnostics” section.
The controller includes entering water temperature sampling logic that automatically invokes during 2-pipe or 4-pipe changeover. It
determines whenthe entering water temperature is either too cool or too hot for the desired heating or cooling mode. Refer to the
“Entering Water section.
Unit configuration
No power to the
The controller must be properly configured based on the actual installed end devices and application. When the unit configuration
does not match the actualend device, the valves may not work correctly.
If the controller does not have power, the valves do not operate. For the controller 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 the
controller 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
typical unit wiring diagrams in the Appendix of this manual.
Table M-D-5. 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 thecurrent step in the test sequence, the valves may be open. Refer to the “Manual Output Test” section.
Diagnostic present
Sampling logic
A specific list of diagnostics affects valve operation. For more information, see the “Diagnostics” section.
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 the “Entering Water
Temperature Sampling” section.
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
typical unit wiring diagrams inthe Appendix of this manual.
62
UNT-SVX07A-EN
diagnostics
Maintenance
Table M-D-6. Electric Heat Not Operating
Probable Cause
Explanation
Normal operation
Requested mode: off
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 “Manual Output Test”
section.
Diagnostic present
Unit configuration
A specific list of diagnostics affects electric heat operation. For more information, see the “Diagnostics” section.
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
Unit Wiring
If the controller does not have power, electric heat does not operate. For the controller to operate normally, a
24VAC input voltage must be applied. Whenthe green LED is off continuously, the controller does not have sufficient power or has
failed.
The wiring between the controller outputs and the electric heat contacts must be present and correct for normal electric heat
operation. Refer to the typicalunit wiring diagrams in the Appendix of this manual.
Table M-D-7. Fresh Air Damper Stays Open
Probable Cause
Explanation
Normal operation
The controller opens and closes the fresh air damper based on the controller’s occupancy mode and fan status. Normally, the
fresh air damper is open during m 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 output
wiring. However, based on thecurrent step in the test sequence, the fresh air damper may not be open. Refer to
the “Manual Output Test” section.
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 actualend 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 typical unit wiringdiagrams in the Appendix of this manual.
Table M-D-8. Fresh Air Damper Stays Closed
Probable Cause
Explanation
Normal operation
The controller opens and closes the fresh air damper based on the controller’s occupancy mode and fan status. Normally, the
fresh air damper is open during m occupied mode when the fan is running and closed during unoccupied mode.
Warmup and cooldown
Requested mode: off
Manual output test
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.
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.
The controller includes a manual output test sequence that verifies analog and binary output operation and associated output
wiring. However, based on thecurrent step in the test sequence, the fresh air damper may not be open. Refer to
the “Manual Output Test” section.
Diagnostic present
Unit configuration
A specific list of diagnostics effects fresh air damper operation. For more information, see the “Diagnostics” section.
The controller must be properly configured based on the actual installed end devices and application. When the unit
configuration does not match the actualend device, the damper may not work correctly.
No power to the controller
Unit wiring
If the controller does not have power, the fresh air damper does not operate. For the controller to operate normally, a
24 VAC input voltage must be applied.When the green LED is off continuously, the controller does not have sufficient power or has
failed.
The wiring between the controller outputs and the fresh air damper must be present and correct for normal damper operation. Refer
to the typical unit wiringdiagrams in the Appendix of this manual.
UNT-SVX07A-EN
63
Maintenance
troubleshooting
Board switches are factory set based on
unit control options. Figure M-T-2 shows a
relay board detail. Additional information
on switch settings follows.
Switch SW1: Controller Type
SW1 determines the unit control type.
Position 1 indicates one of the following:
• generic field controller
• low-voltage fan speed switch
• Tracer ZN010
• Tracer ZN510
Position 2 indicates Tracer ZN520.
Switch SW2: Electric Heat
SW2 determines if the unit has electric
heat.
Switch SW3: High-Speed Interlock
SW3 determines if the unit will have a
safety-mandated “high-speed interlock”
with electric heat. High-speed interlock
ensures heat dissipates in a manner that
keeps the unit in a safe operating
condition. SW3 configures the unit to
actuate high-speed interlock if the first or
second stage is on.
Figure M-T-1. Resistance temperature curve for the zone sensor, entering water temperature
sensor, and discharge air sensor. Thermisitor = 10kΩ at 77°F.
interface to
LED indicates
Tracer ZN controller
power
SW3 is a three-position slide switch that
actuates high-speed interlock to operate
with specific electric heat coils.
configuration switches
(factory pre-set)
• Position 1: default position and for low
vertical units with electric heat
• Position 2: single-stage electric heat,
model number digit 18 = N
• Position 3: two-stage electric
connection to valve
piping sensor crossover
harness
&
Switch SW4: Electric Heat Lockout
SW4 allows the unit to use the electric
heat lockout function when hydronic heat
is in operation. Electric heat lockout
prevents electric heat from enabling
when hydronic heating is available. This
feature is on models with both hydronic
and electric heat. Low vertical models
with electric heat, switch SW4 to position
2 (on).
Do not adjust these
sw itch positions because
it m ay result in a safety
h a za rd !
Note: HAZARDOUS voltage
in dashed area of board!
Figure M-T-2. Relay board detail
Troubleshooting the Relay
Board
If the board needs replacement, the
switches on the new board must be field-
set in the same positions as the old board,
as shown in the unit wiring diagram.
The relay board serves as a common
interface to all of the standard end
devices, and has an LED that indicates
power to the board. Factory switches are
pre-set and locked in place with lock-tight.
However, these seals can be broken if
field-modifications are needed.
Note: SW3 and SW4 affect safety
functionality, and they are factory
secured. When replacing a board with
SW3 and SW4, be sure to affix the switch
positions with 3M 3764Q or equivalent.
64
UNT-SVX07A-EN
Maintenance
troubleshooting
Troubleshooting Tracer ZN010, ZN510 & ZN520
Gre e n S TATUS LED
indicates whether
the controller is
powered on (24
VAC supplied)
Ye llo w COMM LED
indicates if
communication is
functioning
Re d S ERVICE LED
indicates is
service is needed
Figure M-T-1. The Tracer ZN010 board
If the LED blinks (1/4 second on, 1/4 second
off for 10 seconds) the controller is in the
“Wink” mode.
Red SERVICE LED
During normal operation, the LED is off
continuously when power
is applied to the controller.
Note: The “wink” feature allows the
identification of a particular controller.
When sending a request from a device,
such as Rover™, the controller will
“wink” to indicate it received the signal.
If the LED is on continuously, even when
power is applied to the controller means
that someone is pressing the SERVICE
button or that the controller has failed.
If the LED flashes once every second, use
Rover™, Trane’s service tool, to restore
the unit to normal operation. Refer to the
Rover™ product literature for more
information.
If the LED is off, either the power is off, an
abnormal condition is present or the
TEST button is pressed.
Yellow COMM LED
Note: If the Service button is held down
for more than 15 seconds on the Tracer
ZN520 controller, it will uninstall itself
from the ICS communication network and
shut down all unit operation.
If the LED is off continuously, the
controller is not detecting any
communication. This is normal for units in
standalone applications.
If the LED blinks, the controller detects
communication.
Green STATUS LED
During normal operation, the LED is on
continuously.
If the LED is on continuously, this indicates
an abnormal condition.
Manual Output Test
If the LED blinks once, the controller is in
Manual output test mode.
The purpose of the manual output test
sequence is to verify output and end
device operation. Use the manual output
test to:
If the LED blinks twice the controller is in
Manual output test mode, with one or
more diagnostics present.
UNT-SVX07A-EN
65
Maintenance
troubleshooting
Manual Output Test Procedure
Follow the procedure below to test the
Tracer ZN010, ZN510, and ZN520
controllers.
• Verify output wiring and operation
without using Rover™, service tool
• Force the water valve to open and
balance the hydronic system
1. Press and hold the TEST button for at
least two seconds (not exceeding 5
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.
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 diagnos-
tic reset feature is not active during 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.
If left in an individual test step, the
controller remains in test mode for 60
minutes and then exits to normal
operation.
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.
Many service calls are due to unit
diagnostics. The test sequence resets
unit diagnostics and attempts to restore
normal unit operation prior to testing the
outputs. If the diagnostics remain after a
reset, the STATUS LED indicates the
diagnostic condition is still present (two
blinks).
Table M-T-1. Test sequence for 1-heat/1-cool configurations
steps
fan
BOP1-3
cool output
BOP4 (1)
heat output damper
BOP5 BOP6
1. off
off
off
off
off
off
on
off closed
2. fan High
3. fan medium
4. fan low
5. cool
high
medium
low
off
off
off
off
on
off
closed
closed
closed
closed
closed
open
high
high
high
6. heat
off
off
7. fresh air
damper (3)
8. exit
(2)
Notes:
(1) At the beginning of step 2, the controller attem pts to clear all diagnostics.
(2) For all 1-heat/1-cool applications including 2-pipe changeover, BOP4 energizes in
the cooling test stage and BOP5 energizes in the heat test stage.This occurs even
though during norm al 2-pipe changeover operation BOP4 controls the unit valve
for both cooling and heating.
(2) After the Fresh Air Dam per step, the test sequence perform s the Exit step.This
initiates a reset and attem pts to return the controller to norm al operation.
(3) The fresh air dam per (BOP6) only energizes during this step if binary output 6
has been configured as a fresh air dam per.
66
UNT-SVX07A-EN
m aintenance
procedures
Maintenance
Maintenance Procedures
Perform the following maintenance
procedures to ensure proper unit
operation.
All models except vertical cabinets
Remove the front panel of the vertical
recessed unit and open the bottom panel
door of the horizontal cabinet and
horizontal recessed unit to access the
filter. The front panel of the vertical
cabinet unit does not require removal to
change the filter.
Co il
WARNING
S id e
Live Ele c t ric a l Co m p o n e n t s !
During installation, testing, servicing,
and troubleshooting this equipm ent, it
m ay be necessary to work with live
electrical com ponents. Have a
qualified licensed electrician or other
individual who is properly trained in
handling live electrical com ponents
perform these tasks. Failure to follow
all electrical com ponents could result
in death or serious injury.
Main Drain
Z-Bar
Note: Vertical recessed, horizontal
cabinet, & horizontal recessed units with
a bottom return have filter guides to
secure the filter in position. Also, if these
unit types have a fresh air opening, they
require an additional filter for the fresh air
opening.
Figure M-MP-1. When replacing the fan-
coil’s main drain pan, install it correctly
under the z-bar.
Main Drain Pan
See Figure M-MP-1 to replace main drain
correctly.
CAUTION
Re p la c e a ll p a n e ls a n d filt e rs
properly!
All unit panels and filters m ust be in
place prior to unit startup. Failure to
have panels and filters in place m ay
result in equipm ent dam age.
Vertical Units
WARNING
To remove the main drain pan on vertical
fan-coil units, disconnect the clips holding
the pan to the fanboard. Disconnect the
main and overflow drain hoses and slide
pan forward to remove. See Figure M-
MP-3.
Ha za rd o u s Vo lt a g e w /Ca p a c it o rs !
Disconnect all electric power,
including rem ote disconnects and
discharge all m otor start/run
capacitors before servicing. Follow
proper lockout/tagout procedures to
ensure the power cannot be
inadvertently energized. For variable
frequency drives or other energy
storing com ponents provided by
Trane or others, refer to the
Inspecting and Cleaning Drain Pans
Clean the fan-coil unit’s main and
auxiliary drain pans to ensure the unit
drains condensate properly.
Horizontal Units
To remove the main drain pan on a
horizontal fan-coil unit, peel the insulation
from the edges of the pan’s underside to
access the mounting screws. Remove the
screws and lower the end of the drain
pan closest to the control box. Remove
the drain spout by pulling it from the hole
in the chassis end panel. See Figure M-
MP-4.
Check the condensate drain pan and
drain line to assure the condensate drains
properly at least every six months or as
dictated by operating experience.
appropriate m anufacturer’s literature
for allowable waiting periods for
discharge of capacitors. Verify with an
appropriate voltm eter that all
If evidence of standing water or conden-
sate overflow exists, immediately identify
and remedy the cause.
capacitors have discharged. Failure to
disconnect power and discharge
capacitors before servicing could
result in death or serious injury.
Note: Do not operate the fan-coil unit
without the main and auxiliary drain pans
in place to prevent condensate leakage.
Clean the drain pans of any moisture or
debris.
Auxiliary Drain Pan
1. To remove the auxiliary drain pan,
loosen the hose clamp (installer
supplied) around the drain connection
collar and disconnect the drain line.
2. Remove the overflow drain line to the
auxiliary drain pan if it was installed.
3. Remove the condensate overflow
switch option from the auxiliary drain
pan.
4. Slide the pan horizontally towards the
end of the large groove of the mounting
slots in the chassis end panel and
remove pan from unit. See Figure M-
MP-2.
Air Filters
Change or clean air filters at least twice a
year. Filters require more frequent care
under high load or dirty air conditions
since a clogged filter reduces airflow.
Table M-A-1 lists filter size and quantity
by unit size. Throwaway and pleated
media filters are available for all units.
Follow the instructions below to replace
the disposable filters.
aux. drain pan attaches to these slots
Figure M-MP-2. Insert the auxiliary drain pan
tabs into these slots in the fan-coil’s chassis
end panel. A horizontal unit shown.
UNT-SVX07A-EN
67
m aintenance
procedures
Maintenance
Coil Maintenance
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 the suggested
methods in the following paragraphs.
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 a year to prevent dirt
buildup in the coil fins, where it may not
be visible.
clips hold drain pan in place
Steam and Hydronic Coil Cleaning
Procedure
Remove large debris from the coils and
straighten fins before cleaning. Remove
filters before cleaning.
1. Disconnect all electrical power to the
unit.
Figure M-MP-3. To remove the main drain
pan on vertical fan-coil units, disconnect
the clips holding the pan to the fanboard.
2. Don the appropriate personal
protective equipment (PPE).
3. Access both sides of the coil.
4. Use a soft brush to remove loose
debris from both sides of the coil.
5. 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.
6. Repeat step five as necessary.
Confirm that the drain line is open
following completion of the cleaning
process.
7. Allow the unit to dry thoroughly before
putting the system back into service.
8. Straighten any coil fins that may be
damaged with a fin rake.
Clean the coil fins using steam with
detergent, hot water spray and deter-
gent, or a commercially available
chemical coil cleaner. Be sure to rinse
coils thoroughly after cleaning.
WARNING
m ounting screw s
Ha za rd o u s Ch e m ic a ls !
Coil cleaning agents can be either
acidic or highly alkaline. Handle
chem ical carefully. Proper handling
should include goggles or face shield,
chem ical resistant gloves, boots,
apron or suit as required. For
personal safety refer to the cleaning
agent m anufacturer’s Materials
Safety Data Sheet and follow all
recom m ended safe handling
practices. Failure to follow all safety
instructions could result in death or
serious injury.
Figure M-MP-4. To remove the main drain
pan on horizontal fan-coil units, peel the
insulation from the edges of the pan’s
underside to access the mounting screws.
9. Replace all panels and parts and
restore electrical power to the unit.
Winterizing the Coil
Make provisions to drain coils that are
not in use, especially when subjected to
freezing temperatures.
Inspecting and Cleaning Coils
Coils become externally fouled as a
result of normal operation. Dirt on the
coil surface reduces it’s ability to transfer
heat that can result in 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.
To drain the coil, blow the coil out with
compressed air. Next, fill and drain the
tubes with full-strength ethylene glycol
several times. Drain the coil as com-
pletely as possible.
CAUTION
Co il Fre e ze -u p Da m a g e !
Failure to properly drain and vent
coils when not in use during freezing
tem peratures m ay result in coil
freeze-up dam age.
68
UNT-SVX07A-EN
m aintenance
procedures
Maintenance
Fan Board Assembly Removal
Follow the procedure below when
replacing the coil or making repairs to the
fan or motor.
CAUTION
He a vy Ob je c t !
Support the fanboard when rem oving
it from the unit. Failure to properly
support fanboard m ay result in m inor
to m oderate personal injury.
WARNING
Ha za rd o u s Vo lt a g e w /Ca p a c it o rs !
Disconnect all electric power,
including rem ote disconnects and
discharge all m otor start/run
capacitors before servicing. Follow
proper lockout/tagout procedures to
ensure the power cannot be
inadvertently energized. For variable
frequency drives or other energy
storing com ponents provided by
Trane or others, refer to the
appropriate m anufacturer’s literature
for allowable waiting periods for
discharge of capacitors. Verify with an
appropriate voltm eter that all
capacitors have discharged. Failure to
disconnect power and discharge
capacitors before servicing could
result in death or serious injury.
Replacing the Motor
The capacitor for all unit motors can be
replaced should it fail. Contact the local
Trane service department to replace the
motor capacitor in the event it fails.
However, the motor itself cannot be
repaired or rewound. If the motor fails,
record the model number from the unit
nameplate and present to the local Trane
Service Parts Center to purchase a
replacement. The motor bearings are
permanently lubricated and do not
require any further oiling.
After removing the fanboard assembly
from the unit, disconnect the fan wheel/
wheels from the motor shaft by loosening
the Allen head setscrew on the fan wheel
hub collar. Next, remove the mounting
bolts holding the fan motor plate to the
mounting bracket of the fanboard. Then
remove the motor by sliding the fan shaft
from the fan wheel hub.
Vertical Units
1. Remove the front panel of cabinet and
recessed units.
2. Pull the main and overflow drain hoses
of the main drain pan into the inside of
the fan-coil chassis end panel.
3. Remove the two fanboard mounting
screws.
During re-assembly, make certain the fan
wheel(s) is/are properly centered in the
fan housing to prevent the fan wheel
from contacting the housing on either
side. After the unit has been re-as-
sembled, verify that no unusual noise or
vibration is present at startup.
4. Slide the fanboard out horizontally to
remove.
Control Device Replacement
To order control components such as
relays, contactors, transformers, low
temperature detection devices,
Horizontal Units
1. Open the bottom panel of cabinet and
recessed models.
condensate overflow detection devices,
differential pressure switches, sensors,
control valves and actuators, contact the
local Trane Service Parts Center. To order,
the Trane parts center will need the unit
model number (which can be found on
the unit nameplate), the serial number,
and the part name or ID.
2. Remove the main drain pan following
the instructions given under the drain
pan section above for horizontal fan-coil
units.
3. While supporting the fanboard in place,
remove the two fanboard mounting
screws which secure the fanboard to
the unit.
UNT-SVX07A-EN
69
m aintenance
procedures
Maintenance
Periodic Maintenance
Checklists
Monthly Maintenance
1. Inspect unit air filters. Clean or replace
if airflow is blocked or if filters are dirty.
2. Check the main and auxiliary drain
pans on fan-coil units to be
sure the pans are clean and do not
impede the condensate flow
through the drain line.
Monthly Checklist
The following check list provides the
recommended maintenance schedule to
keep the unit running efficiently.
WARNING
Annual Maintenance
Check and tighten all set screws, bolts,
locking collars and sheaves.
1. Inspect the unit cabinetry for chips or
corrosion. Clean or repair to
provide unit protection.
2. Inspect the fan wheel and housing for
damage. Rotate the fan
wheel manually to be sure movement
is not blocked by obstructions.
3. Inspect the coil fins for excessive dirt or
damage. Remove dirt and
Live Ele c t ric a l Co m p o n e n t s !
During installation, testing, servicing,
and troubleshooting this equipm ent, it
m ay be necessary to work with live
electrical com ponents. Have a
qualified licensed electrician or other
individual who is properly trained in
handling live electrical com ponents
perform these tasks. Failure to follow
all electrical com ponents could result
in death or serious injury.
straighten fins.
4. Clean and tighten all electrical
connections.
5. Inspect the strainer option for debris
trapped in the filter screen.
WARNING
Ha za rd o u s Vo lt a g e w /Ca p a c it o rs !
Disconnect all electric power,
including rem ote disconnects and
discharge all m otor start/run
capacitors before servicing. Follow
proper lockout/tagout procedures to
ensure the power cannot be
inadvertently energized. For variable
frequency drives or other energy
storing com ponents provided by
Trane or others, refer to the
appropriate m anufacturer’s literature
for allowable waiting periods for
discharge of capacitors. Verify with an
appropriate voltm eter that all
capacitors have discharged. Failure to
disconnect power and discharge
capacitors before servicing could
result in death or serious injury.
70
UNT-SVX07A-EN
typical w iring
diagram
Maintenance
CSTI Fan Speed Switch
UNT-SVX07A-EN
71
typical w iring
diagram
Maintenance
CSTI Non Fan Speed Switch
72
UNT-SVX07A-EN
typical w iring
diagram
Maintenance
Line voltage fan speed switch
UNT-SVX07A-EN
73
typical w iring
diagram
Maintenance
Tracer ZN010 with electric heat
74
UNT-SVX07A-EN
typical w iring
diagram
Maintenance
Tracer ZN510 with main and auxilliary valves
UNT-SVX07A-EN
75
typical w iring
diagram
Maintenance
ZN520 with 2-stage electric heat
76
UNT-SVX07A-EN
US
Literature Order Number
UNT-SVX07A-EN
File Number
PL-TD-UNT-SVX07A-EN 0405
UNT-IOM-6 04/00
Supersedes
a business of Am erican Standard Inc.
www.trane.com
Stocking Location
LaCrosse - Inland
For more information contact
your local office or e-mail us at
Trane has a policy of continuous product improvement and reserves the right to change design and specifications
without notice. Only qualified technicians should install and service equipment.
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