50HCQA
Single Package Rooftop
Heat Pump
with Puronr (R---410A) Refrigerant
S i z e s 0 4 --- 0 6
Installation Instructions
NOTE: Read the entire instruction manual before starting
the installation
TABLE OF CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . 2
Unit without Thru-Base Connection Kit . . . . . . . 14
Heat Anticipator Settings . . . . . . . . . . . . . . . . . . . 14
Electric Heaters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Single Point Boxes and Supplementary Fuses . . . . . 16
PremierLinkt (Factory Option) . . . . . . . . . . . . . . . . . 17
Supply Air Temperature (SAT) Sensor . . . . . . . . . 17
Outdoor Air Temperature (OAT) Sensor . . . . . . . 19
EconoMi$ert2 . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Field Connections . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Space Temperature (SPT) Sensors . . . . . . . . . . . . 19
Connect Thermostat . . . . . . . . . . . . . . . . . . . . . . . 19
Configure the Unit for Thermostat Mode . . . . . . 22
Economizer Controls . . . . . . . . . . . . . . . . . . . . . . . . 22
Outdoor Air Enthalpy Control . . . . . . . . . . . . . . . 22
Differential Enthalpy Control . . . . . . . . . . . . . . . . 22
Return Air Enthalpy Sensor . . . . . . . . . . . . . . . . . 22
Indoor Air Quality (CO2 sensor) . . . . . . . . . . . . . 22
Outdoor Air Quality Sensor . . . . . . . . . . . . . . . . . 23
Smoke Detector/Fire Shutdown (FSD) . . . . . . . . . 23
Filter Status Switch . . . . . . . . . . . . . . . . . . . . . . . . 24
Supply Fan Status Switch . . . . . . . . . . . . . . . . . . . 24
Remote Occupied Switch . . . . . . . . . . . . . . . . . . . 24
Space Relative Humidity Sensor . . . . . . . . . . . . . 24
Power Exhaust (output) . . . . . . . . . . . . . . . . . . . . . 24
CCN Communication Bus . . . . . . . . . . . . . . . . . . 24
RTU-MP Control System . . . . . . . . . . . . . . . . . . . . . . 26
Supply Air Temperature (SAT) Sensor . . . . . . . . . 28
Outdoor Air Temperature (OAT) Sensor . . . . . . . 28
EconoMi$ert2 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Field Connections . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Space Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Economizer Controls . . . . . . . . . . . . . . . . . . . . . . . . 29
Outdoor Air Enthalpy Control . . . . . . . . . . . . . . . 29
Differential Enthalpy Control . . . . . . . . . . . . . . . . 29
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Jobsite Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Step 1 - Plan for Unit Location . . . . . . . . . . . . . . . . . . 4
Roof Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Step 2 - Plan for Sequence of Unit Installation . . . . . . 5
Curb-Mount Installation . . . . . . . . . . . . . . . . . . . . . 5
Pad-Mount Installation . . . . . . . . . . . . . . . . . . . . . . 5
Frame-Mount Installation . . . . . . . . . . . . . . . . . . . . 5
Step 3 - Inspect Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Step 4 - Provide Unit Support . . . . . . . . . . . . . . . . . . . 5
Roof Curb Mount . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Slab Mount (Horizontal Units Only) . . . . . . . . . . . 5
Alternate Unit Support . . . . . . . . . . . . . . . . . . . . . . 5
Step 5 - Field Fabricate Ductwork . . . . . . . . . . . . . . . . 7
For Units with Accessory Electric Heaters . . . . . . 7
Step 6 - Rig and Place Unit . . . . . . . . . . . . . . . . . . . . . 7
Positioning on Curb . . . . . . . . . . . . . . . . . . . . . . . . 8
Step 7 - Convert to Horizontal & Connect Ductwork . . 8
Step 8 - Install Outside Air Hood . . . . . . . . . . . . . . . . 9
Economizer Hood Removal and Setup . . . . . . . . . 9
Two Position Damper Hood Removal and Setup . . . 9
Economizer Hood and Two-Position Hood . . . . . 10
Step 9 - Install External Condensate Trap and Line . . . 10
Step 10 - Make Electrical Connections . . . . . . . . . . . 11
Field Power Supply . . . . . . . . . . . . . . . . . . . . . . . . 11
Units without Factory-Installed Disconnect . . . . 11
Units with Factory-Installed Disconnect . . . . . . . 12
Convenience Outlets . . . . . . . . . . . . . . . . . . . . . . . 12
Factory-Option Thru-Base Connections . . . . . . . 13
Units without Thru-Base Connections . . . . . . . . . 14
Field Control Wiring . . . . . . . . . . . . . . . . . . . . . . . 14
Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
1
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Vertical Connections / Economizer
Horizontal Connections / Economizer
C10230
Fig. 1 - Unit Dimensional Drawing – 04 — 06 Size Units
3
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C10231
Fig. 1 - Unit Dimensional Drawing – 04 — 06 Size Unit (cont.)
INSTALLATION
Jobsite Survey
18” (457)1
Complete the following checks before installation.
1. Consult local building codes and the NEC (National
Electrical Code) ANSI/NFPA 70 for special installa-
tion requirements.
42" (1067)
2. Determine unit location (from project plans) or select
unit location.
3. Check for possible overhead obstructions which may
interfere with unit lifting or rigging.
18" (457)
42" (1067)
Step 1 — Plan for Unit Location
1 Required bottom condensate drain connection.
Otherwise, 36” (914mm) for condensate connection.
Select a location for the unit and its support system (curb
or other) that provides for the minimum clearances
required for safety. This includes the clearance to
combustible surfaces, unit performance and service access
below, around and above unit as specified in unit
drawings. See Fig. 2.
C07459
Fig. 2 - Service Clearance Dimensional Drawing
Although unit is weatherproof, avoid locations that permit
water from higher level runoff and overhangs to fall onto
the unit.
NOTE: Consider also the effect of adjacent units.
Unit may be installed directly on wood flooring or on Class
A, B, or C roof-covering material when roof curb is used.
Select a unit mounting system that provides adequate
height to allow for removal and disposal of frost and ice
that will form during the heating-defrost mode as well as
allow installation of condensate trap per requirements.
Refer to Step 9 — Install External Condensate Trap and
Line – for required trap dimensions.
Do not install unit in an indoor location. Do not locate air
inlets near exhaust vents or other sources of contaminated
air.
4
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Roof Mount —
Step 3 — Inspect unit
Inspect unit for transportation damage. File any claim
with transportation agency.
Check building codes for weight distribution
requirements. Unit operating weight is shown in Table 1.
Confirm before installation of unit that voltage, amperage
and circuit protection requirements listed on unit data
plate agree with power supply provided.
Step 2 — Plan for Sequence of Unit Installation
The support method used for this unit will dictate different
sequences for the steps of unit installation. For example,
on curb-mounted units, some accessories must be
installed on the unit before the unit is placed on the curb.
Review the following for recommended sequences for
installation steps.
Step 4 — Provide Unit Support
Roof Curb Mount —
Accessory roof curb details and dimensions are shown in
Fig. 3. Assemble and install accessory roof curb in
accordance with instructions shipped with the curb.
Curb-mounted installation —
Install curb
Install field-fabricated ductwork inside curb
NOTE: The gasketing of the unit to the roof curb is
critical for a watertight seal. Install gasket supplied with
the roof curb as shown in Fig. 3. Improperly applied
gasket can also result in air leaks and poor unit
performance.
Install accessory thru-base service connection package
(affects curb and unit) (refer to accessory installation
instructions for details)
Prepare bottom condensate drain connection to suit
planned condensate line routing (refer to Step 9 for
details)
Curb should be level. This is necessary for unit drain to
function properly. Unit leveling tolerances are show in
Fig. 4. Refer to Accessory Roof Curb Installation
Instructions for additional information as required.
Rig and place unit
Install outdoor air hood
Install insulation, cant strips, roofing felt, and counter
flashing as shown. Ductwork must be attached to curb and
not to the unit. The accessory thru-the-base power package
must be installed before the unit is set on the roof curb.
Install condensate line trap and piping
Make electrical connections
Install other accessories
Pad-mounted installation —
If electric and control wiring is to be routed through the
basepan, attach the accessory thru-the-base service
connections to the basepan in accordance with the
accessory installation instructions.
Prepare pad and unit supports
Check and tighten the bottom condensate drain
connection plug
Rig and place unit
Slab Mount (Horizontal Units Only) —
Convert unit to side duct connection arrangement
Install field-fabricated ductwork at unit duct openings
Install outdoor air hood
Install condensate line trap and piping
Make electrical connections
Provide a level concrete slab that extends a minimum of
6 in. (150 mm) beyond unit cabinet. Install a gravel apron
in front of condenser coil air inlet to prevent grass and
foliage from obstructing airflow.
NOTE: Horizontal units may be installed on a roof curb
if required.
Install other accessories
Frame-mounted installation —
Alternate Unit Support (In Lieu of Curb or Slab
Mount) —
Frame-mounted applications generally follow the
sequence for a curb installation. Adapt as required to
suit specific installation plan.
A non-combustible sleeper rail can be used in the unit curb
support area. If sleeper rails cannot be used, support the long
sides of the unit with a minimum of 3 equally spaced 4-in. x
4-in. (102 mm x 102 mm) pads on each side.
Table 1 – Operating Weights
50HCQA
Component
UNITS LB (KG)
04
05
06
Base Unit
495 (225)
580 (263)
610 (277)
Economizer
Vertical
80 (36)
105 (48)
32 (15)
80 (36)
105 (48)
32 (15)
80 (36)
105 (48)
32 (15)
Horizontal
Powered Outlet
Curb
14---in / 356 mm
24---in / 610 mm
110 (50)
145 (66)
110 (50)
145 (66)
110 (50)
145 (66)
5
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ROOFCURB
ACCESSORY
UNIT SIZE
1’ - 2”
[356]
CRRFCURB001A02
CRRFCURB002A02
50HCQA04-06
2’ - 0”
[610]
C10232
Fig. 3 - Roof Curb Details
6
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!
WARNING
PERSONAL INJURY HAZARD
Failure to follow this warning could cause personal
injury.
For vertical supply and return units, tools or parts
could drop into ductwork and cause an injury. Install
a 90-degree turn in the return ductwork between the
unit and the conditioned space. If a 90-degree elbow
cannot be installed, then a grille of sufficient strength
and density should be installed to prevent objects
from falling into the conditioned space. Due to
electric heater, supply duct will require 90-degree
elbow.
MAXIMUM ALLOWABLE
DIFFERENCE IN. (MM)
A-B
B-C
A-C
0.5” (13)
1.0” (25)
1.0” (25)
C06110
Fig. 4 - Unit Leveling Tolerances
Step 5 — Field Fabricate Ductwork
Cabinet return-air static pressure (a negative condition)
shall not exceed 0.35 in. wg (87 Pa) with economizer or
0.45 in. wg (112 Pa) without economizer.
Step 6 — Rig and Place Unit
Keep unit upright and do not drop. Spreader bars are not
required if top crating is left on unit. Rollers may be used to
move unit across a roof. Level by using unit frame as a
reference. See Table 1 and Fig. 5 for additional information.
For vertical ducted applications, secure all ducts to roof
curb and building structure. Do not connect ductwork to
unit.
Insulate and weatherproof all external ductwork, joints,
and roof openings with counter flashing and mastic in
accordance with applicable codes.
Lifting holes are provided in base rails as shown in Fig. 5.
Refer to rigging instructions on unit.
!
Ducts passing through unconditioned spaces must be
insulated and covered with a vapor barrier.
CAUTION
UNIT DAMAGE HAZARD
If a plenum return is used on a vertical unit, the return
should be ducted through the roof deck to comply with
applicable fire codes.
Failure to follow this caution may result in
equipment damage.
All panels must be in place when rigging. Unit is not
designed for handling by fork truck.
For Units with Accessory Electric Heaters —
Horizontal applications require a minimum clearance to
combustible surfaces of 1-in (25 mm) from duct for first
12-in (305 mm) away from unit. Vertical applications do not
require a minimum clearance.
Before setting the unit onto the curb, recheck gasketing on
curb.
Minimum clearance is not required around ductwork.
Outlet grilles must not lie directly below unit discharge.
NOTE: A 90-degree elbow must be provided in the
ductwork to comply with UL (Underwriters Laboratories)
code for use with electric heat.
7
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C06005
DIMENSIONS
B
MAX WEIGHT
A
C
UNIT
LB
KG
330
384
409
IN
MM
1890
1890
1890
IN
MM
980
955
955
IN
MM
850
50HCQA04
50HCQA05
50HCQA06
725
845
900
74.5
74.5
74.5
38.5
37.5
37.5
33.5
41.5
41.5
1055
1055
NOTES:
1. Dimensions in ( ) are in millimeters.
2. Hook rigging shackles through holes in base rail, as shown in detail “A.” Holes in base rails are centered around the
unit center of gravity. Use wooden top to prevent rigging straps from damaging unit.
Fig. 5 - Rigging Details
Positioning on Curb —
Position unit on roof curb so that the following clearances
1
are maintained: /4 in. (6.4 mm) clearance between the
roof curb and the base rail inside the front and rear, 0.0 in.
clearance between the roof curb and the base rail inside on
the duct end of the unit. This will result in the distance
between the roof curb and the base rail inside on the
condenser end of the unit being approximately equal to
Fig. 3, section C-C.
Although unit is weatherproof, guard against water from
higher level runoff and overhangs.
After unit is in position, remove the compressor access
panel. Holding the blocking between compressors with
one hand, cut the strapping. Carefully remove the
blocking without damaging tubing, wiring, or controls.
Remove the strapping and replace the access panel.
Remove all shipping materials and top skid. Recycle or
dispose of all shipping materials.
C06108
Fig. 6 - Horizontal Conversion Panels
Step 7 — Convert to Horizontal and Connect
Ductwork (when required)
Field-supplied flanges should be attached to horizontal
duct openings and all ductwork should be secured to the
flanges. Insulate and weatherproof all external ductwork,
joints, and roof or building openings with counter flashing
and mastic in accordance with applicable codes.
Unit is shipped in the vertical duct configuration. Unit
without factory-installed economizer or return air smoke
detector option may be field-converted to horizontal
ducted configuration. To convert to horizontal
configuration, remove screws from side duct opening
covers and remove covers. Using the same screws, install
covers on vertical duct openings with the insulation-side
down. Seals around duct openings must be tight. See
Fig. 6.
Do not cover or obscure visibility to the unit’s informative
data plate when insulating horizontal ductwork.
8
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Two Position Damper Hood Removal and Setup -
Factory Option —
Step 8 — Install Outside Air Hood
Economizer Hood Removal and Setup -
Factory Option —
1. The hood is shipped in knock-down form and
assembled to a metal support tray using plastic stretch
wrap. Located in the return air compartment, the
assembly’s metal tray is attached to the basepan and
also attached to the damper using two plastic tie-wraps.
2. To gain access to the hood, remove the filter access
panel. (See Fig. 7.)
3. Locate the (2) screws holding the metal tray to the
basepan and remove. Locate and cut the (2) plastic
tie-wraps securing the assembly to the damper. (See
Fig. 9.) Be careful to not damage any wiring or cut
tie-wraps securing any wiring.
4. Carefully lift the hood assembly (with metal tray)
through the filter access opening and assemble per the
steps outlined in Economizer Hood and Two–Position
Hood on page 10.
1. The hood is shipped in knock-down form and located
in the return air compartment. It is attached to the
economizer using two plastic tie-wraps.
2. To gain access to the hood, remove the filter access
panel. (See Fig. 7.)
3. Locate and cut the (2) plastic tie-wraps, being careful
to not damage any wiring. (See Fig. 8.)
4. Carefully lift the hood assembly through the filter
access opening and assemble per the steps outlined
in Economizer Hood and Two–Position Hood on
page 10.
FILTER ACCESS PANEL
Remove Hood Parts
Cut Plastic Ties
(2) Places
COMPRESSOR
ACCESS PANEL
Economizer
OUTDOOR-AIR OPENING AND
INDOOR COIL ACCESS PANEL
C06023
Fig. 7 - Typical Access Panel Locations
C08633
Fig. 8 - Economizer Wiring
Hood Parts
Plastic Tie Wrap
Qty (2)
Screws for Metal Tray
Qty (2)
C08639
Fig. 9 - Damper Assembly
9
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Economizer Hood and Two-Position Hood —
filter rack (hood divider). Push the filter into position
past the open filter clips. Close the filter clips to lock
the filter into place. See Fig. 12.
NOTE: If the power exhaust accessory is to be installed
on the unit, the hood shipped with the unit will not be
used and must be discarded. Save the aluminum filter for
use in the power exhaust hood assembly.
1. The indoor coil access panel will be used as the top of
the hood. Remove the screws along the sides and bot-
tom of the indoor coil access panel. See Fig. 10.
DIVIDER
OUTSIDE
AIR
SIDE
PANEL
HOOD
CLEANABLE
ALUMINUM
FILTER
FILTER
BAROMETRIC
RELIEF
FILTER
CLIP
TOP
SIDE
C08634
PANEL
CAULK
HERE
Fig. 12 - Economizer Filter Installation
INDOOR
COIL
ACCESS
PANEL
INDOOR
COIL
ACCESS
PANEL
6. Caulk the ends of the joint between the unit top panel
and the hood top.
7. Replace the filter access panel.
C06025
Fig. 10 - Indoor Coil Access Panel Relocation
Step 9 — Install External Condensate Trap and
Line
2. Swing out indoor coil access panel and insert the
hood sides under the panel (hood top). Use the screws
provided to attach the hood sides to the hood top. Use
screws provided to attach the hood sides to the unit.
See Fig. 11.
3
The unit has one /4-in. condensate drain connection on
the end of the condensate pan and an alternate connection
on the bottom. See Fig. 13. Unit airflow configuration
does not determine which drain connection to use. Either
drain connection can be used with vertical or horizontal
applications.
TOP
When using the standard side drain connection, ensure the
red plug in the alternate bottom connection is tight. Do
this before setting the unit in place. The red drain pan can
be tightened with a 1/2 -in. square socket drive extension.
PANEL
INDOOR COIL
ACCESS PANEL
To use the alternate bottom drain connection, remove the
1
red drain plug from the bottom connection (use a /2 - i n .
LEFT
HOOD
square socket drive extension) and install it in the side
drain connection.
SCREW
SIDE
19 1/16”
B
(483mm)
33 3/8”
(848mm)
HOOD DIVIDER
C06026
Fig. 11 - Economizer Hood Construction
CONDENSATE PAN (SIDE VIEW)
3. Remove the shipping tape holding the economizer ba-
rometric relief damper in place.
ALTERNATE
BOTTOM DRAIN
STANDARD
SIDE DRAIN
DRAIN PLUG
(FACTORY-INSTALLED)
4. Insert the hood divider between the hood sides. See
Fig. 11 and 12. Secure hood divider with 2 screws on
each hood side. The hood divider is also used as the
bottom filter rack for the aluminum filter.
5. Open the filter clips which are located underneath the
hood top. Insert the aluminum filter into the bottom
C08021
Fig. 13 - Condensate Drain Pan (Side View)
The piping for the condensate drain and external trap can
be completed after the unit is in place. See Fig. 14.
10
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unit disconnect. On a unit without a unit-mounted
disconnect, connect the source leads to compressor
contactor C and indoor fan contactor IFC pressure lugs
with unit field power leads.
MINIMUM PITCH
1” (25mm) PER
10’ (3m) OF LINE
BASE RAIL
2˝ (51) MIN
All units except 208/230-v units are factory wired for the
voltage shown on the nameplate. If the 208/230-v unit is
to be connected to a 208-v power supply, the control
transformer must be rewired by moving the black wire
with the 1/4-in. female spade connector from the 230-v
connection and moving it to the 208-v 1/4-in. male
terminal on the primary side of the transformer. Refer to
unit label diagram for additional information. Field power
wires will be connected line-side pressure lugs on the
power terminal block or at factory-installed option
non-fused disconnect.
OPEN
VENT
TO ROOF
DRAIN
SEE NOTE
ROOF
CURB
DRAIN PLUG
NOTE: Trap should be deep enough to offset maximum unit static
difference. A 4” (102) trap is recommend. ed
C08022
Fig. 14 - Condensate Drain Piping Details
Field power wires are connected to the unit at line-side
pressure lugs on compressor contactor C and indoor fan
contactor IFC or terminal board (see wiring diagram label
for control box component arrangement) or at
factory-installed option non-fused disconnect switch.
Max wire size is #2 AWG (copper only). (See Fig. 16)
All units must have an external trap for condensate
drainage. Install a trap at least 4-in. (102 mm) deep and
protect against freeze-up. If drain line is installed
downstream from the external trap, pitch the line away
from the unit at 1-in. per 10 ft (25 mm in 3 m) of run. Do
not use a pipe size smaller than the unit connection
(3/4-in.).
NOTE: TEST LEADS - Unit may be equipped with
short leads (pigtails) on the field line connection points on
contactor C or optional disconnect switch. These leads are
for factory run-test purposes only; remove and discard
before connecting field power wires to unit connection
points. Make field power connections directly to line
connection pressure lugs only.
Step 10 — Make Electrical Connections
!
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
!
WARNING
FIRE HAZARD
Do not use gas piping as an electrical ground. Unit
cabinet must have an uninterrupted, unbroken
electrical ground to minimize the possibility of
personal injury if an electrical fault should occur. This
ground may consist of electrical wire connected to
unit ground lug in control compartment, or conduit
approved for electrical ground when installed in
accordance with NEC (National Electrical Code);
ANSI/NFPA 70, latest edition (in Canada, Canadian
Failure to follow this warning could result in
intermittent operation or performance satisfaction.
Do not connect aluminum wire between disconnect
switch and furnace. Use only copper wire.
(See Fig. 15.)
Electrical
Code
CSA
[Canadian
Standards
Association] C22.1), and local electrical codes.
ELECTRIC
DISCONNECT
SWITCH
NOTE: Check all factory and field electrical connections
for tightness. Field-supplied wiring shall conform with
the limitations of 63_F (33_C) rise.
COPPER
WIRE ONLY
ALUMINUM
WIRE
Field Power Supply —
If equipped with optional Powered Convenience Outlet:
The power source leads to the convenience outlet’s
transformer primary are not factory connected. Installer
must connect these leads according to required operation
of the convenience outlet. If an always-energized
convenience outlet operation is desired, connect the
source leads to the line side of the unit-mounted
disconnect. (Check with local codes to ensure this method
is acceptable in your area.) If a de-energize via unit
disconnect switch operation of the convenience outlet is
desired, connect the source leads to the load side of the
A93033
Fig. 15 - Disconnect Switch and Unit
Units Without Factory-Installed Disconnect —
When installing units, provide a disconnect switch per
NEC (National Electrical Code) of adequate size.
Disconnect sizing data is provided on the unit informative
plate. Locate on unit cabinet or within sight of the unit per
national or local codes. Do not cover unit informative
plate if mounting the disconnect on the unit cabinet.
11
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Units with Factory-Installed Disconnect —
Convenience Outlets —
The factory-installed option disconnect switch is located
in a weatherproof enclosure located under the main
control box. The manual switch handle is accessible
through an opening in the access panel. Discard the
factory test leads (see Fig. 16).
!
WARNING
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal
injury or death.
Units Without Disconnect Option
Units with convenience outlet circuits may use
multiple disconnects. Check convenience outlet for
power status before opening unit for service. Locate
its disconnect switch, if appropriate, and open it.
Tag-out this switch, if necessary.
IFC
(3 Phase
Indoor Motor)
C
C
(1 Phase Indoor Motor
and 3 Phase Unit)
11
23
11
13
13
TB
Two types of convenience outlets are offered on 50HCQA
models: Non-powered and unit-powered. Both types
provide a 125-volt GFCI (ground-fault circuit-interrupter)
duplex receptacle rated at 15-A behind a hinged waterproof
access cover, located on the end panel of the unit. See
Fig. 17.
Disconnect
per
NEC
Disconnect
per
NEC
L1
L2
L3
208/230-1-60
208/230-3-60
460-3-60
575-3-60
Pwd-CO
Transformer
Convenience
Outlet
GFCI
Units With Disconnect Option
L1
2
1
Pwd-CO
Fuse
Switch
Optional
Disconnect
Switch
Factory
Wiring
4
6
3
5
L2
L3
Disconnect factory test leads; discard.
C10241
Control Box
Access Panel
Fig. 16 - Power Wiring Connections
C08128
All Units: All field wiring must comply with NEC and all
local codes. Size wire based on MCA (Minimum Circuit
Amps) on the unit informative plate. See Fig. 16 and the
unit label diagram for power wiring connections to the
unit power terminal blocks and equipment ground.
Maximum wire size is #2 ga AWG per pole.
Fig. 17 - Convenience Outlet Location
Installing Weatherproof Cover: weatherproof
A
while-in-use cover for the factory-installed convenience
outlets is now required by UL standards. This cover
cannot be factory-mounted due its depth; it must be
installed at unit installation. For shipment, the
convenience outlet is covered with a blank cover plate.
Provide a ground-fault and short-circuit over-current
protection device (fuse or breaker) per NEC Article 440
(or local codes). Refer to unit informative data plate for
MOCP (Maximum Over-current Protection) device size.
The weatherproof cover kit is shipped in the unit’s control
box. The kit includes the hinged cover, a backing plate
and gasket.
All field wiring must comply with the NEC and local
requirements.
DISCONNECT ALL POWER TO UNIT AND
CONVENIENCE OUTLET.
Remove the blank cover plate at the convenience outlet;
discard the blank cover.
Loosen the two screws at the GFCI duplex outlet, until
approximately 1/2-in (13 mm) under screw heads are
exposed. Press the gasket over the screw heads. Slip the
backing plate over the screw heads at the keyhole slots
and align with the gasket; tighten the two screws until
snug (do not over-tighten).
12
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Mount the weatherproof cover to the backing plate as
shown in Fig. 18. Remove two slot fillers in the bottom of
the cover to permit service tool cords to exit the cover.
Check for full closing and latching.
Test the GFCI receptacle by pressing the TEST button on
the face of the receptacle to trip and open the receptacle.
Check for proper grounding wires and power line phasing
if the GFCI receptacle does not trip as required. Press the
RESET button to clear the tripped condition.
COVER – WHILE-IN-USE
RECEPTACLE
WEATHERPROOF
NOT INCLUDED
BASE PLATE FOR
GFCI RECEPTACLE
C09022
Fig. 18 - Weatherproof Cover Installation
C08283
Non-powered type: This type requires the field
installation of a general-purpose 125-volt 15-A circuit
powered from a source elsewhere in the building. Observe
national and local codes when selecting wire size, fuse or
breaker requirements and disconnect switch size and
location. Route 125-v power supply conductors into the
bottom of the utility box containing the duplex receptacle.
UNIT
CONNECT
AS
PRIMARY
TRANSFORMER
TERMINALS
VOLTAGE
CONNECTIONS
208,
230
L1: RED +YEL
L2: BLU + GRA
H1 + H3
H2 + H4
240
480
600
L1: RED
Splice BLU +
YEL
H1
H2 + H3
H4
460
575
L2: GRA
Unit-powered type: A unit-mounted transformer is
factory-installed to stepdown the main power supply
voltage to the unit to 115-v at the duplex receptacle. This
option also includes a manual switch with fuse, located in
a utility box and mounted on a bracket behind the
convenience outlet; access is through the unit’s control
box access panel. See Fig. 17.
L1: RED
L2: GRA
H1
H2
Fig. 19 - Powered Convenience Outlet Wiring
Using unit-mounted convenience outlets: Units with
unit-mounded convenience outlet circuits will often
require that two disconnects be opened to de-energize all
power to the unit. Treat all units as electrically energized
until the convenience outlet power is also checked and
de-energization is confirmed. Observe National Electrical
Code Article 210, Branch Circuits, for use of convenience
outlets.
The primary leads to the convenience outlet transformer
are not factory-connected. Selection of primary power
source is a customer-option. If local codes permit, the
transformer primary leads can be connected at the
line-side terminals on the unit-mounted non-fused
disconnect or HACR breaker switch; this will provide
service power to the unit when the unit disconnect switch
or HACR switch is open. Other connection methods will
result in the convenience outlet circuit being de-energized
when the unit disconnect or HACR switch is open. See
Fig. 19.
Fuse on power type: The factory fuse is a Bussman
“Fusetron” T-15, non-renewable screw-in (Edison base)
type plug fuse.
Factory-Option Thru-Base Connections —
1
This service connection kit consists of a /2 -in electrical
Duty Cycle: the unit-powered convenience outlet has a
duty cycle limitation. The transformer is intended to
provide power on an intermittent basis for service tools,
lamps, etc; it is not intended to provide 15-amps loading
for continuous duty loads (such as electric heaters for
overnight use). Observe a 50% limit on circuit loading
above 8-amps (i.e., limit loads exceeding 8-amps to 30
minutes of operation every hour).
bulkhead connector and a 3/4 -in electrical bulkhead
connector, all factory-installed in the embossed (raised)
section of the unit basepan in the condenser section. The
1/2 -in bulkhead connector enables the low-voltage control
3
wires to pass through the basepan. The /4 -in electrical
bulkhead connector allows the high-voltage power wires
to pass through the basepan. See Fig. 20.
Check tightness of connector lock nuts before connecting
electrical conduits.
13
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electronic thermostat, configure it for “non-heat pump”
operation. Locate the thermostat accessory on a solid wall
in the conditioned space to sense average temperature in
accordance with the thermostat installation instructions.
LOW VOLTAGE
CONDUIT
If the thermostat contains a logic circuit requiring 24-v
power, use a thermostat cable or equivalent single leads of
different colors with minimum of seven leads. If the
thermostat does not require a 24-v source (no “C”
connection required), use a thermostat cable or equivalent
with minimum of six leads. Check the thermostat
installation instructions for additional features which
might require additional conductors in the cable.
CONNECTOR
HIGH VOLTAGE
CONDUIT
CONNECTOR
C08637
For wire runs up to 50 ft. (15 m), use no. 18 AWG
(American Wire Gage) insulated wire (35_C minimum).
For 50 to 75 ft. (15 to 23 m), use no. 16 AWG insulated
wire (35_C minimum). For over 75 ft. (23 m), use no. 14
AWG insulated wire (35_C minimum). All wire sizes
larger than no. 18 AWG cannot be directly connected to
the thermostat and will require a junction box and splice
at the thermostat.
Fig. 20 - Thru-Base Connection Fittings
Field-supplied and field-installed liquid-tight conduit
connectors and conduit may be attached to the connectors
on the basepan. Pull correctly rated high voltage and low
voltage through appropriate conduits. Connect the power
conduit to the internal disconnect (if unit is so equipped)
or to the external disconnect (through unit side panel). A
hole must be field cut in the main control box bottom on
the left side so the 24-v control connections can be made.
Connect the control power conduit to the unit control box
at this hole.
Typical
Thermostat
Connections
Central
Terminal
Board
X
C
G
Units without Thru-Base Connections —
C
T
1. Install power wiring conduit through side panel open-
ings. Install conduit between disconnect and control
box.
2. Install power lines to terminal connections as shown
in Fig. 16.
H
E
R
M
O
S
T
G
W2
W1
Y2
Y1
R
W2
W1
(Note 2)
All Units: Voltage to compressor terminals during
operation must be within voltage range indicated on unit
nameplate. See Table 10. On 3-phase units, voltages
between phases must be balanced within 2% and the
current within 10%. Use the formula shown in the legend
for Table 10, Note 2 (see page 42) to determine the
percent of voltage imbalance. Operation on improper line
voltage or excessive phase imbalance constitutes abuse
and may cause damage to electrical components. Such
operation would invalidate any applicable Carrier
warranty.
O/B/Y2
(Note 1)
A
T
Y1
R
Note 1: Typical multi-function marking. Follow manufacturer’s configuration
instructions to select Y2. Do not configure for O output.
Note 2: W2 connection not required on units without electric heating.
Field Wiring
C09012
Fig. 21 - Typical Low-Voltage Control Connections
Field Control Wiring —
The 50HCQA unit requires an external temperature
Unit without Thru-Base Connection Kit —
control device. This device can be
a
thermostat
Pass the thermostat control wires through the hole
provided in the corner post; then feed the wires through
the raceway built into the corner post to the control box.
Pull the wires over to the terminal strip on the upper-left
corner of the Central Terminal Board (CTB). See Fig. 22.
(field-supplied) or a PremierLink controller (available as
factory-installed option or as field-installed accessory, for
use on a Carrier Comfort Network or as a stand alone
control) or the RTU-MP Controller for Building
Management Systems using non-CCN protocols
(RTU-MP is available as a factory-installed option only).
NOTE: If thru-the-bottom connections accessory is
used, refer to the accessory installation instructions for
information on routing power and control wiring.
Thermostat —
Install
a
Carrier-approved accessory
2
stage
Heat Anticipator Settings —
Cooling/Heating thermostat according to installation
instructions included with the accessory. The 50HCQ
models do not require a thermostat with an O function to
control the reversing valve operation. If using an
Set heat anticipator settings at 0.14 amp for the first stage
and 0.14 amp for second-stage heating, when available.
14
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RACEWAY
DISCONNECT MOUNTING
LOCATION
INDOOR
ACCESS
PANEL
UNIT BLOCK-OFF
PANEL
OUTDOOR
ACCESS PANEL
C08133
Fig. 23 - Typical Access Panel Location
HOLE IN END PANEL (HIDDEN)
C08027
Not all available heater modules may be used in every
unit. Use only those heater modules that are UL listed for
use in a specific size unit. Refer to the label on the unit
cabinet for the list of approved heaters.
Unit heaters are marked with Heater Model Numbers. But
heaters are ordered as and shipped in cartons marked with
a corresponding heater Sales Package part number. See
Table 2 for correlation between heater Model Number and
Sales Package part number.
Fig. 22 - Field Control Wiring Raceway
Electric Heaters
50HCQ units may be equipped with field-installed
accessory electric heaters. The heaters are modular in
design, with heater frames holding open coil resistance
wires strung through ceramic insulators, line-break limit
switches and a control contactor. One or two heater
modules may be used in a unit.
Heater modules are installed in the compartment below
the indoor (supply) fan outlet. Access is through the
indoor access panel. Heater modules slide into the
compartment on tracks along the bottom of the heater
opening. See Fig. 23, Fig. 24 and Fig. 25.
NOTE: The value in position 9 of the part number differs
between the sales package part number (value is 1 or 3)
and a bare heater model number (value is 0).
Table 2 – Heater Model Number
Bare Heater Model Number
C
C
R
R
H
E
A
T
E
R
R
0
1
0
0
1
1
A
A
0
0
0
0
Heater Sales Package PNO
Includes:
Bare Heater
H
E
A
T
E
Carton and packing materials
Installation sheet
DISCONNECT EMT OR RIGID CONDUIT SINGLE
CENTER MANUAL RESET
MOUNTING
LOCATION
(FIELD-SUPPLIED)
POINT BOX POST
LIMIT SWITCH
HEATER
COVERS
SINGLE POINT
MAIN
BRACKET AND BOX
HEATER
MODULE
HEATER
MODULE
HEATER
CONTROL CONDUIT
MOUNTING
SCREW
MOUNTING
BOX
DRIP BOOT
(LOCATION 1) (LOCATION 2) BRACKET
CONTROL WIRE TERMINAL BLOCK
C08134
Fig. 24 - Typical Component Location
15
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CONTROL
BOX
2
1
1
1
2
1
3
3
BUSHING
SINGLE
POINT BOX
MOUNTING
SCREWS
DRIP BOOT
BRACKET
MOUNTING
SCREWS
TRACK
POWER
WIRES
2 3
2 1
1 3
1 1
FOAM
BUSHING
LLIED
PA
CORP
.
MDEL
NO.
OD
EAL NO.
FLANGE
22.2
IED AIR
NTIONING
UACCESS
1
3
23
2-
46N
.
P
/
N
5610-4
REV
HEATER
RELAYS
HEATER
MOUNTING
SCREWS
C08136
C08135
Fig. 26 - Typical Single Point Installation
Fig. 25 - Typical Module Installation
Single Point Boxes and Supplementary Fuse
All fuses on 50HCQ units are 60-A. (Note that all heaters
are qualified for use with a 60-A fuse, regardless of actual
heater ampacity, so only 60-A fuses are necessary.)
When the unit MOCP device value exceeds 60-A,
unit-mounted supplementary fuses are required for each
heater circuit. These fuses are included in accessory
Single Point Boxes, with power distribution and fuse
blocks. The single point box will be installed directly
under the unit control box, just to the left of the partition
separating the indoor section (with electric heaters) from
the outdoor section. The Single Point Box has a hinged
access cover. See Fig. 26. The Single Point Box also
includes pigtails to complete the wiring between the
Single Point Box and the unit’s main control box
terminals. Refer to the accessory heater and Single Point
Box installation instructions for details on tap
connections.
Single Point Boxes without Fuses: Refer to accessory
heater and Single Point Box installation instructions for
details on tap connections.
Low-Voltage Control Connections: Run the low-voltage
control leads from the heater module(s) - VIO and BRN
(two of each if two modules are installed; identify for
Module #1) - to the 4-pole terminal board TB4 located on
the heater bulkhead to the left of Heater #1. Connect the
VIO leads from Heater #1 and Heater #2 to terminal
TB4-1. Connect the BRN leads to terminal TB4-3. See
Fig. 27.
DEFROST
BOARD
E-HEAT
ORN
BRN
P3-3
ORN
1
BRN
3
TB4
VIO
VIO
BRN BRN
Field
Connections
Elec Htr
VIO
HR2
HR1
BRN
BRN
VIO
HR1: On Heater 1 in Position #1
HR2: On Heater 2 in Position #2 (if installed)
C09013
Fig. 27 - Accessory Electric Heater Control Connections
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PremierLinkt (Factory--Option)
C08199
Fig. 28 - PremierLink Controller
The PremierLink controller (see Fig. 28) is compatible
with Carrier Comfort Networkr (CCN) devices. This
control is designed to allow users the access and ability to
change factory-defined settings, thus expanding the
function of the standard unit control board. CCN service
access tools include System Pilot (TM), Touch Pilot (TM)
and Service Tool. (Standard tier display tools Navigatort
and Scrolling Marquee are not suitable for use with latest
PremierLink controller (Version 2.x).)
The SAT is factory-wired. The SAT probe is wire-tied to
the supply-air opening (on the horizontal opening end) in
its shipping position. Remove the sensor for installation.
Re-position the sensor in the flange of the supply-air
opening or in the supply air duct (as required by local
codes). Drill or punch a /2 -in. hole in the flange or duct.
Use two field-supplied, self-drilling screws to secure the
sensor probe in a horizontal orientation. See Fig. 29.
1
The PremierLink control is factory-mounted in the
50HCQ unit’s main control box to the left of the Central
Terminal Board (CTB). Factory wiring is completed
through harnesses connected to the CTB thermostat. Field
connections are made at a 16-pole terminal block (TB1)
located on the bottom shelf of the unit control box in front
of the PremierLink controller. The factory-installed
PremierLink control includes the supply-air temperature
(SAT) sensor. The outdoor air temperature (OAT) sensor is
included in the FIOP/accessory EconoMi$ert2 package.
ROOF
CURB
SUPPLY AIR
TEMPERATURE
SENSOR
The PremierLink controller requires the use of a Carrier
electronic thermostat or a CCN connection for time
broadcast to initiate its internal timeclock. This is
necessary for broadcast of time of day functions
(occupied/unoccupied).
SUPPLY AIR
RETURN AIR
C08200
Fig. 29 - Typical Mounting Location for Supply Air
Temperature (SAT) Sensor on Small Rooftop Units
NOTE: PremierLink controller is shipped in Sensor
mode. To be used with a thermostat, the PremierLink
controller must be configured to Thermostat mode. Refer
to PremierLink Configuration instructions for Operating
Mode.
NOTE:
Refer to Form 33CS-58SI for complete
PremierLink configuration, operating sequences and
troubleshooting information. Have a copy of this manual
available at unit start-up.
Supply Air Temperature (SAT) Sensor —
NOTE: The sensor must be mounted in the discharge
airstream downstream of the cooling coil and any heating
devices. Be sure the probe tip does not come in contact
with any of the unit’s heater surfaces.
On FIOP-equipped 50HCQ unit, the unit is supplied with a
supply-air temperature (SAT) sensor (33ZCSENSAT). This
sensor is a tubular probe type, approx 6-inches (152.4 mm)
in length. It is a nominal 10-k ohm thermistor.
17
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C10227
Fig. 30 - Typical PremierLink Wiring Schematic
18
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Outdoor Air Temperature (OAT) Sensor —
Connect T
-55: See Fig. 31 for typical T-55 internal
connections. Connect the T-55 SEN terminals to TB1
terminals 1 and 3 (see Fig. 32).
The OAT is factory-mounted in the EconoMi$er2 (FIOP
or accessory). It is a nominal 10k ohm thermistor attached
to an eyelet mounting ring.
TB1
1
PL
EconoMi$ert2 —
SEN
SEN
J6-7
The PremierLink control is used with EconoMi$er2
(option or accessory) for outdoor air management. The
damper position is controlled directly by the PremierLink
control; EconoMi$er2 has no internal logic device.
J6-6
3
C08212
Fig. 32 - PremierLink T-55 Sensor
Outdoor air management functions can be enhanced with
field-installation of these accessory control devices:
Connect T-56: See Fig. 33 for T-56 internal connections.
Install a jumper between SEN and SET terminals as
illustrated. Connect T-56 terminals to TB1 terminals 1, 3
and 5 (see Fig. 34).
Enthalpy control (outdoor air or differential sensors)
Space CO2 sensor
Outdoor air CO2 sensor
Refer to Table 3 for accessory part numbers.
Field Connections
1
2
4
5
6
3
RED(+)
Field connections for accessory sensor and input devices are
made at the 16-pole terminal block (TB1) located on the
control box bottom shelf in front of the PremierLink control
(See Fig. 30). Some input devices also require a 24-vac
WHT(GND)
CCN COM
BLK(-)
SET
SEN
SW1
BLK
(T56)
BRN (GND)
BLU (SPT)
signal source; connect at CTB terminal
R
at
SENSOR WIRING
“THERMOSTAT” connection strip for this signal source.
See connections figures on following pages for field
connection locations (and for continued connections at the
PremierLink board inputs).
JUMPER
TERMINALS
AS SHOWN
Table 4 provides a summary of field connections for units
equipped with Space Sensor. Table 5 provides a summary of
field connections for units equipped with Space Thermostat.
Cool
Warm
C08202
Fig. 33 - T-56 Internal Connections
Space Temperature (SPT) Sensors —
The PremierLink controller is factory-shipped configured for
Space Sensor Mode. A Carrier T-55 or T-56 space sensor
must be used. T-55 space temperature sensor provides a
signal of space temperature to the PremierLink control. T-56
provides same space temperature signal plus it allows for
adjustment of space temperature setpoints from the face of
the sensor by the occupants.
TB1
1
PL
SEN
SEN
J6-7
PL
TB1
3
J6-6
Jumper
SET
SET
J6-5
5
C08213
Fig. 34 - PremierLink T-56 Sensor
Connect Thermostat —
1
2
4
5
6
3
RED(+)
WHT(GND)
CCN COM
BLK(-)
SEN
A 7-wire thermostat connection requires a 24-v power
source and a common connection. Use the R and C
terminals on the CTB’s THERMOSTAT connection strip
for these. Connect the thermostat’s Y1, Y2, W1, W2 and
G terminals to PremierLink TB1 as shown in Fig. 35.
SW1
BRN (GND)
BLU (SPT)
SENSOR WIRING
If the 50HCQ unit is equipped with factory-installed
smoke detector(s), disconnect the factory BLU lead at
TB1-6 (Y2) before connecting the thermostat. Identify the
BLU lead originating at CTB-DDC-1; disconnect at
TB1-6 and tape off. Confirm that the second BLU lead at
TB1-6 remains connected to PremierLink J4-8.
C08201
Fig. 31 - T-55 Space Temperature Sensor Wiring
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CTB
SPACE
THERMOSTAT
THERMOSTAT
R
TB1
2
R
PL
J4-12
G
Y1
Y2
W1
W2
C
J4-10
J4-8
J4-6
J4-4
4
6
8
10
C
CTB
THERMOSTAT
C08119
Fig. 35 - Space Thermostat Connections
Table 3 – PremierLink Sensor Usage
OUTDOOR AIR
TEMPERATURE
SENSOR
RETURN AIR
TEMPERATURE
SENSOR
OUTDOOR AIR
ENTHALPY SENSOR
RETURN AIR
ENTHALPY SENSOR
APPLICATION
Differential Dry Bulb
Temperature with
PremierLink
(PremierLink requires
4 --- 20 m A A ctuator)
R eq uired ---
33ZCT55SPT
or equivalent
I nclud ed ---
---
---
---
CRTEMPSN001A00
Single Enthalpy with
PremierLink
(PremierLink requires
4 --- 20m A A ctuator)
I nclud ed ---
Not Used
R eq uires ---
33CSENTHSW
---
---
Differential Enthalpy
with PremierLink
(PremierLink requires
4 --- 20m A A ctuator)
R eq uires ---
33CSENTHSW
or equivalent
R eq uires ---
33CSENTSEN
or equivalent
I nclud ed ---
Not Used
NOTES:
CO Sensors (Optional):
2
33ZCSENCO2 --- Room sensor (adjustable). Aspirator box is required for duct mounting of the sensor.
33ZCASPCO2 --- Aspirator box used for duct---mounted CO room sensor.
2
33ZCT55CO2 --- Space temperature and CO room sensor with override.
2
33ZCT56CO2 --- Space temperature and CO room sensor with override and setpoint.
2
20
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Table 4 – Space Sensor Mode
TB1 TERMINAL
FIELD CONNECTION
T55 --- S E N /T56 --- S E N
RMTOCC
INPUT SIGNAL
Analog (10k thermistor)
Discrete, 24VAC
1
2
3
T55 --- S E N /T56 --- S E N
CMPSAFE
Analog (10k thermistor)
Discrete, 24VAC
4
5
T56---SET
Analog (10k thermistor)
Discrete, 24VAC
6
FSD
7
LOOP---PWR
Analog, 24VDC
8
SPS
Discrete, 24VAC
9
IAQ---SEN
A nalog, 4 --- 20m A
Discrete, 24VAC
10
11
12
13
14
15
16
FILTER
I A Q --- CO M /O A Q --- CO M /R H --- CO M
CCN + (RED)
OAQ---SEN/RH---SEN
CCN Gnd (WHT)
AUX OUT(Power Exhaust)
CCN --- (BLK)
A nalog, 4 --- 20m A
Digital, , 5VDC
A nalog, 4 --- 20m A
Digital, 5VDC
(Output)Discrete 24VAC
Digital, 5VDC
LEGEND:
T 5 5
T 5 6
CCN
C MP SA F E
F ILT E R
--- Sp a c e Te m p e r a t u r e S e n so r
F S D --- F ir e S h u t d o w n
IA Q --- In d o o r A ir Q u a lit y ( C O )
OAQ --- Outdoor Air Quality (CO )
2
R H --- R e la t iv e H u m id it y
S F S --- S u p p ly Fa n S t a t u s
--- Sp a c e Te m p e r a t u r e S e n so r
--- Carrier Comfort Network (communication bus)
--- C o m p r e sso r S a f e t y
2
--- D i r t y F i lt e r S w i t c h
Table 5 – Thermostat Mode
TB1 TERMINAL
FIELD CONNECTION
INPUT SIGNAL
Analog (10k thermistor)
Discrete, 24VAC
1
2
RAT SEN
G
3
RAT SEN
Y1
Analog (10k thermistor)
Discrete, 24VAC
4
5
6
Y2
LOOP---PWR
Discrete, 24VAC
Analog, 24VDC
Discrete, 24VAC
Analog, 4---20mA
Discrete, 24VAC
Analog, 4---20mA
Digital, 5VDC
7
8
W1
9
I A Q --- S E N
10
11
12
13
14
15
16
W2
I A Q --- CO M /O A Q --- CO M /R H --- CO M
CCN + (RED)
O A Q --- S E N /R H --- S E N
CCN Gnd (WHT)
AUX OUT (Power Exhaust)
CCN --- (BLK)
Analog, 4---20mA
Digital, 5VDC
(Output) Discrete 24VAC
Digital, 5VDC
LEGEND:
CCN
G
IAQ
OAQ
RAT
---
---
---
---
---
Carrier Comfort Network (communication bus)
Thermostat Fan
RH --- Relative Humidity
W1 --- Thermostat Heat Stage 1
W2 --- Thermostat Heat Stage 2
Y1 --- Thermostat Cool Stage 1
Y2 --- Thermostat Cool Stage 2
Indoor Air Quality (CO )
2
Outdoor Air Quality (CO )
2
Return Air Temperature
21
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If the 50HCQ unit has an economizer system and
free-cooling operation is required, a sensor representing
Return Air Temperature must also be connected
(field-supplied and installed). This sensor may be a T-55
Space Sensor (see Fig. 31) installed in the space or in the
return duct, or it may be sensor PNO 33ZCSENSAT,
installed in the return duct. Connect this sensor to TB1-1
and TB1-3 per Fig. 32.
Differential Enthalpy Control —
Differential enthalpy control is provided by sensing and
comparing the outside air and return air enthalpy
conditions. Install the outdoor air enthalpy control as
described above. Add and install a return air enthalpy
sensor.
Return Air Enthalpy Sensor —
Configure the Unit for Thermostat Mode —
Mount the return-air enthalpy sensor (33CSENTSEN) in
the return-air section of the economizer. The return air
sensor is wired to the enthalpy controller
(33CSENTHSW). See Fig. 37.
Connect to the CCN bus using a CCN service tool and
navigate to PremierLink Configuration screen for
Operating Mode. Default setting is Sensor Mode (value
1). Change the value to 0 to reconfigure the controller for
Thermostat Mode.
24V
RED
ECONO
MOTOR
When the PremierLink is configured for Thermostat
Mode, these functions are not available: Fire Shutdown
(FSD), Remote Occupied (RMTOCC), Compressor Safety
(CMPSAFE), Supply Fan Status (SFS), and Filter Pressure
Switch (FILTER).
– 4-20
Main
BLK
GND
LOW
+ VDC
Out
GRA
ESL
Economizer Controls
Outdoor Air Enthalpy Control
(PNO 33CSENTHSW) —
+ 24-36
VDC In
– 4-20 Main
Out
The enthalpy control (33CSENTHSW) is available as a
field-installed accessory to be used with the EconoMi$er2
damper system. The outdoor air enthalpy sensor is part of
the enthalpy control. (The separate field-installed
accessory return air enthalpy sensor (33CSENTSEN) is
required for differential enthalpy control. See Fig. 36.)
C09027
Fig. 37 - Outside and Return Air Enthalpy Sensor
Wiring
To wire the return air enthalpy sensor, perform the
following:
Locate the enthalpy control in the economizer next to the
Actuator Motor. Locate two GRA leads in the factory
harness and connect the gray lead labeled “ESL” to the
terminal labeled “LOW”. See Fig. 36. Connect the
enthalpy control power input terminals to economizer
actuator power leads RED (connect to 24V) and BLK
(connect to GND).
1. Use a 2-conductor, 18 or 20 AWG, twisted pair cable
to connect the return air enthalpy sensor to the enthal-
py controller.
2. Connect the field-supplied RED wire to (+) spade
connector on the return air enthalpy sensor and the
(+) terminal on the enthalpy controller. Connect the
BLK wire to (-) spade connector on the return air en-
thalpy sensor and the (-) terminal on the enthalpy
controller.
Enthalpy
Switch
24V
RED
BLK
ECONO
MOTOR
Indoor Air Quality (CO2 sensor) —
GND
The indoor air quality sensor accessory monitors space
carbon dioxide (CO2) levels. This information is used to
monitor IAQ levels. Several types of sensors are available,
for wall mounting in the space or in return duct, with and
without LCD display, and in combination with space
temperature sensors. Sensors use infrared technology to
measure the levels of CO2 present in the space air.
CTB
ECON
LOW
GRA
7
ESL
Factory Wiring Harness
C09026
Fig. 36 - Enthalpy Switch (33CSENTHSW) Connections
The CO2 sensors are all factory set for a range of 0 to
2000 ppm and a linear mA output of 4 to 20. Refer to the
instructions supplied with the CO2 sensor for electrical
requirements and terminal locations. See Fig. 38 for
typical CO2 sensor wiring schematic.
The outdoor enthalpy changeover setpoint is set at the
enthalpy controller.
22
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Refer to Form 33CS-58SI, PremierLink Installation,
Start-up, and Configuration Instructions, for detailed
configuration information
Outdoor Air Quality Sensor
(PNO 33ZCSENCO2 plus weatherproof enclosure) —
The outdoor air CO2 sensor is designed to monitor carbon
dioxide (CO2) levels in the outside ventilation air and
interface with the ventilation damper in an HVAC system.
The OAQ sensor is packaged with an outdoor cover. See
Fig. 40. The outdoor air CO2 sensor must be located in the
economizer outside air hood.
+ 0-10VDC
-
SIG COM
4-20mA
+
ALARM
NC
COM RELAY
}
NO CONTACTS
24 VAC
OR
24 VDC
H G
+
-
2 1
J3
5 4 3 2 1
8 7 6
J4
C08635
Fig. 38 - Indoor/Outdoor Air Quality (CO2) Sensor
(33ZCSENCO2) - Typical Wiring Diagram
To accurately monitor the quality of the air in the
conditioned air space, locate the sensor near a return-air
grille (if present) so it senses the concentration of CO2
leaving the space. The sensor should be mounted in a
location to avoid direct breath contact.
COVER REMOVED
SIDE VIEW
Do not mount the IAQ sensor in drafty areas such as near
supply ducts, open windows, fans, or over heat sources.
Allow at least 3 ft (0.9 m) between the sensor and any
corner. Avoid mounting the sensor where it is influenced
by the supply air; the sensor gives inaccurate readings if
the supply air is blown directly onto the sensor or if the
supply air does not have a chance to mix with the room air
before it is drawn into the return airstream.
C07135
Fig. 40 - Outdoor Air Quality Sensor Cover
Wiring the Outdoor Air CO2 Sensor: A dedicated
power supply is required for this sensor. A two-wire cable
is required to wire the dedicated power supply for the
sensor. The two wires should be connected to the power
supply and terminals 1 and 2.
Wiring the Indoor Air Quality Sensor: For each sensor,
use two 2-conductor 18 AWG (American Wire Gage)
twisted-pair cables (unshielded) to connect the separate
isolated 24 vac power source to the sensor and to connect
the sensor to the control board terminals.
To connect the sensor to the control, identify the positive
(4 to 20 mA) and ground (SIG COM) terminals on the
OAQ sensor. See Fig. 38. Connect the 4 to 20 mA
terminal to the TB1-13 terminal of the 50HCQ. Connect
the SIG COM terminal to the TB1-11 terminal of the
50HCQA. See Fig. 41.
To connect the sensor to the control, identify the positive
(4 to 20 mA) and ground (SIG COM) terminals on the
sensor. See Fig. 38. Connect the 4-20 mA terminal to
terminal TB1-9 and connect the SIG COM terminal to
terminal TB1-11. See Fig. 39.
OAQ Sensor/RH Sensor
TB1
13
PL
J5-2
SEN
TB1
11
COM
J5-3
IAQ Sensor
TB1
9
PL
J5-5
24 VAC
SEN
C08275
TB1
11
Fig. 41 - Outdoor CO2 Sensor Connections
Smoke Detector/Fire Shutdown (FSD) —
COM
J5-3
24 VAC
C08636
Fig. 39 - Indoor CO2 Sensor (33ZCSENCO2)
Connections
This function is available only when PremierLink is
configured for (Space) Sensor Mode. The unit is
factory-wired for PremierLink FSD operation when
PremierLink is factory-installed.
23
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Fan (Pressure) Switch (NO, close on rise in pressure)
On 50HCQ units equipped with factory-installed Smoke
Detector(s), the smoke detector controller implements the
unit shutdown through its NC contact set connected to the
unit’s CTB input. The FSD function is initiated via the
smoke detector’s Alarm NO contact set. The PremierLink
communicates the smoke detector’s tripped status to the
CCN building control. See Fig. 30, the PremierLink
wiring schematic.
CTB
Thermostat
R
PL
J4-6
TB1
8
C08118
Fig. 43 - PremierLink Wiring Fan Pressure Switch
Connection
Filter Status Switch —
This function is available only when PremierLink is
configured for (Space) Sensor Mode.
Remote Occupied Switch —
The PremierLink control permits a remote timeclock to
override the control’s on-board occupancy schedule and
place the unit into Occupied mode. This function may also
provide a “Door Switch” time delay function that will
terminate cooling and heating functions after a 2-20
minute delay.
PremierLink control can monitor return filter status in two
ways: By monitoring a field-supplied/installed filter
pressure switch or via supply fan runtime hours.
Using switch input: Install the dirty filter pressure switch
according to switch manufacturer’s instructions, to
measure pressure drop across the unit’s return filters.
Connect one side of the switch’s NO contact set to CTB’s
THERMOSTAT-R terminal. Connect the other side of the
NO contact set to TB1-10. Setpoint for Dirty Filter is set
at the switch. See Fig. 42.
Connect one side of the NO contact set on the timeclock
to CTB’s THERMOSTAT-R terminal. Connect the other
side of the timeclock contact to the unit’s TB1-2 terminal.
CTB
Thermostat
R
Remote Occupied
Filter Switch (NO, close on rising pressure (high drop))
Time Clock
CTB
Thermostat
TB1
2
PL
J4-12
R
C08214
Fig. 44 - PremierLink Wiring Remote Occupied
TB1
10
PL
J4-4
Refer to Form 33CS-58SI for additional information on
configuring the PremierLink control for Door Switch
timer function.
C08216
Fig. 42 - PremierLink Filter Switch Connection
Space Relative Humidity Sensor —
When the filter switch’s NO contact set closes as filter
pressure drop increases (indicating dirt-laden filters), the
input signal to PremierLink causes the filter status point to
read “DIRTY”.
The RH sensor is not used with 50HCQ models at this
time.
Power Exhaust (output) —
Using Filter Timer Hours: Refer to Form 33CS-58SI for
instructions on using the PremierLink Configuration
screens and on unit alarm sequence.
Connect the accessory Power Exhaust contactor coils(s)
per Fig. 45.
Supply Fan Status Switch —
Power Exhaust
TB1
15
PL
J8-3
The PremierLink control can monitor supply fan operation
through a field-supplied/installed differential pressure
switch. This sequence will prevent (or interrupt) operation
of unit cooling, heating and economizer functions until
the pressure switch contacts are closed indicating proper
supply fan operation.
PEC
TAN
CTB
THERMOSTAT
C
GRA
C08120
Fig. 45 - PremierLink Power Exhaust Output
Connection
Install the differential pressure switch in the supply fan
section according to switch manufacturer’s instructions.
Arrange the switch contact to be open on no flow and to
close as pressure rises indicating fan operation.
CCN Communication Bus —
The PremierLink controller connects to the bus in a daisy
chain arrangement. Negative pins on each component
must be connected to respective negative pins, and
likewise, positive pins on each component must be
connected to respective positive pins. The controller
Connect one side of the switch’s NO contact set to CTB’s
THERMOSTAT-R terminal. Connect the other side of the
NO contact set to TB1-8. Setpoint for Supply Fan Status
is set at the switch. See Fig. 43.
24
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signal pins must be wired to the signal ground pins.
Wiring connections for CCN must be made at the 3-pin
plug.
Connecting CCN bus:
NOTE: When connecting the communication bus cable,
a
color code system for the entire network is
recommended to simplify installation and checkout. See
Table 7 for the recommended color code.
At any baud (9600, 19200, 38400 baud), the number of
controllers is limited to 239 devices maximum. Bus length
may not exceed 4000 ft, with no more than 60 total
devices on any 1000-ft section. Optically isolated RS-485
repeaters are required every 1000 ft.
Table 7 – Color Code Recommendations
CCN BUS WIRE
COLOR
CCN PLUG PIN
NUMBER
SIGNAL TYPE
NOTE: Carrier device default is 9600 band.
+
Ground
---
Red
White
Black
1
2
3
Communications Bus Wire Specifications: The CCN
Communication Bus wiring is field-supplied and
field-installed. It consists of shielded 3-conductor cable
with drain (ground) wire. The cable selected must be
identical to the CCN Communication Bus wire used for
the entire network.
Connect the CCN (+) lead (typically RED) to the unit’s
TB1-12 terminal. Connect the CCN (ground) lead
(typically WHT) to the unit’s TB1-14 terminal. Connect
the CCN (-) lead (typically BLK) to the unit’s TB1-16
terminal. See Fig. 46.
See Table 6 for recommended cable.
Table 6 – Recommended Cables
MANUFACTURER
Alpha
CABLE PART NO.
2413 or 5463
A22503
CCN Bus
American
Belden
TB1
12
PL
J2-1
8772
+ (RED)
Columbia
02525
TB1
14
GND (WHT)
J2-2
NOTE: Conductors and drain wire must be at least 20
AWG, stranded, and tinned copper. Individual conductors
must be insulated with PVC, PVC/nylon, vinyl, Teflon, or
polyethylene. An aluminum/polyester 100% foil shield
and an outer jacket of PVC, PVC/nylon, chrome vinyl, or
Teflon with a minimum operating temperature range of
- 2 0 _C to 60_C is required. Do not run communication
wire in the same conduit as or next to any AC voltage
wiring.
TB1
16
– (BLK)
J2-3
C08276
Fig. 46 - PremierLink CCN Bus Connections
The communication bus shields must be tied together at
each system element. If the communication bus is entirely
within one building, the resulting continuous shield must
be connected to ground at only one single point. If the
communication bus cable exits from one building and
enters another building, the shields must be connected to
the grounds at a lightning suppressor in each building (one
point only).
25
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The RTU-MP control is factory-mounted in the 50HCQ
unit’s main control box, to the left of the CTB. See
Fig. 48. Factory wiring is completed through harnesses
connected to the CTB. Field connections for RTU-MP
sensors will be made at the Phoenix connectors on the
RTU-MP board. The factory-installed RTU-MP control
includes the supply-air temperature (SAT) sensor. The
outdoor air temperature (OAT) sensor is included in the
FIOP/accessory EconoMi$er2 package.
RTU-MP Control System
The RTU-MP controller, see Fig. 47, provides expanded
stand-alone operation of the HVAC system plus
connection and control through communication with
several Building Automation Systems (BAS) through
popular third-party network systems. The available
network systems are BACnet MP/TP, Modbus and
Johnson J2. Communication with LonWorks is also
possible by adding an accessory interface card to the
RTU-MP. Selection of the communication protocol and
baud rate are made at on-board DIP switches.
Refer to Table 8, RTU-MP Controller Inputs and Outputs
for locations of all connections to the RTU-MP board.
C07129
Fig. 47 - RTU-MP Multi-Protocol Control Board
C10228
Fig. 48 - 50HCQ Control Box Component Locations
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C10229
Fig. 49 - Typical RTU-MP System Control Wiring Diagram
27
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Table 8 – RTU-MP Controller Inputs and Outputs
BACnet OBJECT
TYPE OF I/O
NAME
CONNECTION PIN
NUMBERS
POINT NAME
INPUTS
Space Temperature Sensor
Supply Air Temperature
Local Outside Air Temperature Sensor
Space Temperature Offset Pot
Indoor Air Quality
Outdoor Air Quality
Safety Chain Feedback
Compressor Safety
sptsens
sat
oatsens
sptopot
iaq
oaq
safety
compstat
firedown
enthalpy
humstat
AI (10K Thermistor)
AI (10K Thermistor)
AI (10K Thermistor)
AI (100K Potentiometer)
A I (4 --- 20 m a)
J 20 --- 1, 2
J2---1, 2
J2---3, 4
J 20 --- 3
J4---2, 3
J4---5, 6
J1---9
A I (4 --- 20 m a)
DI (24 VAC)
DI (24 VAC)
DI (24 VAC)
DI (24 VAC)
DI (24 VAC)
J1---2
Fire Shutdown
Enthalpy Switch
Humidistat Input Status
J 1 --- 10
J2---6, 7
J5---7, 8
CONFIGURABLE INPUTS*
Space Relative Humidity
Outside Air Relative Humidity
Supply Fan Status
sprh
oarh
A I (4 --- 20 m a)
A I (4 --- 20 m a)
DI (24 VAC)
DI (24 VAC)
DI (24 VAC)
J 4 --- 2, 3 or J 4 --- 5, 6
fanstat
J5---1,2 or J5---3,4 or
J5 5,6 or J5---7,8
Filter Status
filtstat
Remote Occupancy Input
remocc
OUTPUTS
econocmd
Economizer Commanded Position
Supply Fan Relay State
4---20ma
J2---5
J1---4
J1---8
J1---7
J1---6
J1---5
J 11 --- 3
J 11 --- 7, 8
sf
DO Relay (24VAC , 1A)
DO Relay (24VAC , 1A)
DO Relay (24VAC , 1A)
DO Relay (24VAC , 1A)
DO Relay (24VAC , 1A)
DO Relay (24VAC , 1A)
DO Relay (24VAC, 1A)
Compressor 1 Relay State
Compressor 2 Relay State
Heat Stage 1 Relay State
Heat Stage 2 Relay State
Power Exhaust Relay State
Dehumidification Relay State
comp_1
comp_2
heat_1
heat_2
aux_2
humizer
LEGEND
AI --- A n a lo g In p u t
AO --- A n a lo g O u t p u t
DI --- D iscr e t e In p u t
DO --- Discrete Output
*
These inputs (if installed) take the place of the default input on the specific channel according to schematic.
Pa r a lle l p in s J 5 --- 1 = J 2 --- 6 , J 5 --- 3 = J 1 --- 1 0 , J 5 --- 5 = J 1 --- 2 a r e u se d f o r f ie ld --- in st a lla t io n .
The RTU-MP controller requires the use of a Carrier
space sensor. A standard thermostat cannot be used with
the RTU-MP system.
Outdoor Air Temperature (OAT) Sensor —
The OAT is factory-mounted in the EconoMi$er2 (FIOP
or accessory). It is a nominal 10k ohm thermistor attached
to an eyelet mounting ring.
Supply Air Temperature (SAT) Sensor —
On FIOP-equipped 50HCQ unit, the unit is supplied with a
supply-air temperature (SAT) sensor (33ZCSENSAT). This
sensor is a tubular probe type, approx 6-inches (152.4 mm)
in length. It is a nominal 10-k ohm thermistor.
EconoMi$ert2 —
The RTU-MP control is used with EconoMi$er2 (option
or accessory) for outdoor air management. The damper
position is controlled directly by the RTU-MP control;
EconoMi$er2 has no internal logic device.
The SAT is factory-wired. The SAT probe is wire-tied to
the supply-air opening (on the horizontal opening end) in
its shipping position. Remove the sensor for installation.
Re-position the sensor in the flange of the supply-air
opening or in the supply air duct (as required by local
Outdoor air management functions can be enhanced with
field-installation of these accessory control devices:
Enthalpy control (outdoor air or differential sensors)
Space CO2 sensor
Outdoor air CO2 sensor
1
codes). Drill or punch a /2 -in. hole in the flange or duct.
Use two field-supplied, self-drilling screws to secure the
sensor probe in a horizontal orientation. See Fig. 29.
28
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Connect T-59: The T-59 space sensor requires a
separate, isolated power supply of 24 VAC. See Fig. 51
for internal connections at the T-59. Connect the SEN
terminal (BLU) to RTU-MP J20-1. Connect the COM
terminal (BRN) to J20-2. Connect the SET terminal (STO
or BLK) to J20-3.
Field Connections
Field connections for accessory sensors and input devices
are made the RTU-MP, at plugs J1, J2, J4, J5, J11 and J20.
All field control wiring that connects to the RTU-MP
must be routed through the raceway built into the corner
post as shown in Fig. 22. The raceway provides the UL
required clearance between high- and low-voltage wiring.
Pass the control wires through the hole provided in the
corner post, then feed the wires thorough the raceway to
the RTU-MP. Connect to the wires to the removable
Phoenix connectors and then reconnect the connectors to
the board.
BRN (COM)
BLK (STO)
BLU (SPT)
SENSOR
WIRING
OR
SET SEN
Space Temperature (SPT) Sensors —
A field-supplied Carrier space temperature sensor is
required with the RTU-MP to monitor space temperature.
There are 3 sensors available for this application:
OPB COM- PWR+
S 33ZCT55SPT, space temperature sensor with override
button
POWER
WIRING
24 VAC
NOTE: Must use a separate isolated transformer.
S 33ZCT56SPT, space temperature sensor with override
button and setpoint adjustment
C07132
S 33ZCT59SPT, space temperature sensor with LCD
(liquid crystal display) screen, override button, and
setpoint adjustment
Fig. 52 - Space Temperature Sensor Typical Wiring
(33ZCT59SPT)
Economizer Controls
Use 20 gauge wire to connect the sensor to the controller.
The wire is suitable for distances of up to 500 ft. Use a
three-conductor shielded cable for the sensor and setpoint
adjustment connections. If the setpoint adjustment
(slidebar) is not required, then an unshielded, 18 or 20
gauge, two-conductor, twisted pair cable may be used.
Outdoor Air Enthalpy Control
(PNO 33CSENTHSW) —
The enthalpy control (33CSENTHSW) is available as a
field-installed accessory to be used with the EconoMi$er2
damper system. The outdoor air enthalpy sensor is part of
the enthalpy control. (The separate field-installed
accessory return air enthalpy sensor (33CSENTSEN) is
required for differential enthalpy control. See Fig. 36.)
Connect T-55: See Fig. 31 for typical T-55 internal
connections. Connect the T-55 SEN terminals to
RTU-MP J20-1 and J20-2. See Fig. 50.
J20-1
SEN
Locate the enthalpy control in the economizer next to the
Actuator Motor. Locate two GRA leads in the factory
harness and connect the gray lead labeled “ESL” to the
terminal labeled “LOW”. See Fig. 36. Connect the
enthalpy control power input terminals to economizer
actuator power leads RED (connect to 24V) and BLK
(connect to GND).
J20-2
SEN
Fig. 50 - RTU-MP T-55 Sensor ConnectionsC08460
Connect T-56: See Fig. 33 for T-56 internal connections.
Install a jumper between SEN and SET terminals as
illustrated. Connect T-56 terminals to RTU-MP J20-1,
J20-2 and J20-3 per Fig. 51.
The outdoor enthalpy changeover setpoint is set at the
enthalpy controller.
Differential Enthalpy Control —
Differential enthalpy control is provided by sensing and
comparing the outside air and return air enthalpy
conditions. Install the outdoor air enthalpy control as
described above. Add and install a return air enthalpy
sensor.
SEN
SEN
J20-1
J20-2
Jumper
SET
SET
Return Air Enthalpy Sensor —
Mount the return-air enthalpy sensor (33CSENTSEN) in
the return-air section of the economizer. The return air
sensor is wired to the enthalpy controller
(33CSENTHSW). See Fig. 37.
J20-3
Fig. 51 - RTU-MP T-56 Sensor ConnectionsC08461
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To wire the return air enthalpy sensor, perform the
following:
Outdoor Air Quality Sensor
(PNO 33ZCSENCO2 plus weatherproof enclosure) —
1. Use a 2-conductor, 18 or 20 AWG, twisted pair cable
to connect the return air enthalpy sensor to the enthal-
py controller.
2. Connect the field-supplied RED wire to (+) spade
connector on the return air enthalpy sensor and the
(+) terminal on the enthalpy controller. Connect the
BLK wire to (-) spade connector on the return air en-
thalpy sensor and the (-) terminal on the enthalpy
controller.
The outdoor air CO2 sensor is designed to monitor carbon
dioxide (CO2) levels in the outside ventilation air and
interface with the ventilation damper in an HVAC system.
The OAQ sensor is packaged with an outdoor cover. See
Fig. 40. The outdoor air CO2 sensor must be located in the
economizer outside air hood.
Wiring the Outdoor Air CO2 Sensor — A dedicated power
supply is required for this sensor. A two-wire cable is
required to wire the dedicated power supply for the sensor.
The two wires should be connected to the power supply
and terminals 1 and 2.
Indoor Air Quality (CO2 sensor) —
The indoor air quality sensor accessory monitors space
carbon dioxide (CO2) levels. This information is used to
monitor IAQ levels. Several types of sensors are available,
for wall mounting in the space or in return duct, with and
without LCD display, and in combination with space
temperature sensors. Sensors use infrared technology to
measure the levels of CO2 present in the space air.
To connect the sensor to the control, identify the positive
(4 to 20 mA) and ground (SIG COM) terminals on the
OAQ sensor. See Fig. 38. Connect the 4 to 20 mA
terminal to RTU-MP J4-5. Connect the SIG COM
terminal to RTU-MP J4-6.
The CO2 sensors are all factory set for a range of 0 to
2000 ppm and a linear mA output of 4 to 20. Refer to the
instructions supplied with the CO2 sensor for electrical
requirements and terminal locations. See Fig. 38 for
typical CO2 sensor wiring schematic.
OAQ Sensor/RH Sensor
J4-5
J4-6
SEN
COM
To accurately monitor the quality of the air in the
conditioned air space, locate the sensor near a return-air
grille (if present) so it senses the concentration of CO2
leaving the space. The sensor should be mounted in a
location to avoid direct breath contact.
24 VAC
C08463
Fig. 54 - RTU-MP / Outdoor CO2 Sensor
(33ZCSENCO2) Connections
Do not mount the IAQ sensor in drafty areas such as near
supply ducts, open windows, fans, or over heat sources.
Allow at least 3 ft (0.9 m) between the sensor and any
corner. Avoid mounting the sensor where it is influenced
by the supply air; the sensor gives inaccurate readings if
the supply air is blown directly onto the sensor or if the
supply air does not have a chance to mix with the room air
before it is drawn into the return airstream.
On 50HCQ units equipped with factory-installed Smoke
Detector(s), the smoke detector controller implements the
unit shutdown through its NC contact set connected to the
unit’s CTB input. The FSD function is initiated via the
smoke detector’s Alarm NO contact set. The RTU-MP
controller communicates the smoke detector’s tripped
status to the BAS building control. See Fig. 49, the
RTU-MP system control wiring schematic.
Wiring the Indoor Air Quality Sensor: For each sensor,
use two 2-conductor 18 AWG (American Wire Gage)
twisted-pair cables (unshielded) to connect the separate
isolated 24 vac power source to the sensor and to connect
the sensor to the control board terminals.
The
Fire
Shutdown
Switch
configuration,
identifies the
MENU→Config→Inputs→input 5,
normally open status of this input when there is no fire
alarm.
Connecting Discrete Inputs —
To connect the sensor to the control, identify the positive
(4 to 20 mA) and ground (SIG COM) terminals on the
sensor. See Fig. 38. Connect the 4-20 mA terminal to
RTU-MP J4-2 and connect the SIG COM terminal to
RTU-MP J4-3. See Fig. 53.
Filter Status: The filter status accessory is
field-installed accessory. This accessory detects plugged
filters. When installing this accessory, the unit must be
a
configured
for
filter
status
by
setting
MENU→Config→Inputs→input 3, 5, 8, or 9 to Filter
Status and normally open (N/O) or normally closed (N/C).
Input 8 or 9 is recommended for easy of installation. Refer
to Fig. 47 and Fig. 49 for wire terminations at J5.
IAQ Sensor
J4-2
SEN
Fan Status: The fan status accessory is a field-installed
accessory. This accessory detects when the indoor fan is
blowing air. When installing this accessory, the unit must
COM
J4-3
24 VAC
be
configured
for
fan
status
by
setting
C08462
MENU→Config→Inputs→input 3, 5, 8, or 9 to Fan
Status and normally open (N/O) or normally closed (N/C).
Fig. 53 - RTU-MP / Indoor CO2 Sensor
(33ZCSENCO2) Connections
30
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Input 8 or 9 is recommended for easy of installation. Refer
to Fig. 47 and Fig. 49 for wire terminations at J5.
Space Relative Humidity Sensor: The RH sensor is not
used with 50HCQ models at this time.
Remote Occupancy: The remote occupancy accessory is
a field-installed accessory. This accessory overrides the
unoccupied mode and puts the unit in occupied mode.
When installing this accessory, the unit must be
Communication Wiring -- Protocols
General —
configured for
remote occupancy by setting
Protocols are the communication languages spoken by
control devices. The main purpose of a protocol is to
communicate information in the most efficient method
possible. Different protocols exist to provide different
kinds of information for different applications. In the BAS
application, many different protocols are used, depending
on manufacturer. Protocols do not change the function of
a controller; just make the front end user different.
MENU→Config→Inputs→input 3, 5, 8, or 9 to Remote
Occupancy and normally open (N/O) or normally closed
(N/C).
Also set MENU→Schedules→occupancy source to DI
on/off. Input 8 or 9 is recommended for easy of
installation. Refer to Fig. 47 and Table 8 for wire
terminations at J5.
The RTU-MP can be set to communicate on four different
protocols: BACnet, Modbus, N2, and LonWorks. Switch 3
(SW3) on the board is used to set protocol and baud rate.
Switches 1 and 2 (SW1 and SW2) are used to set the
board’s network address. See Fig. 56 for the switch setting
per protocol. The 3rd party connection to the RTU-MP is
through plug J19.
Power Exhaust (output): Connect the accessory Power
Exhaust contactor coil(s) per Fig. 55.
Power Exhaust
PEC
J11-3
TAN
NOTE: Power must be cycled after changing the SW1-3
switch settings.
CTB
THERMOSTAT
Refer to the RTU-MP 3rd Party Integration Guide for
more detailed information on protocols, 3rd party wiring,
and networking.
C
GRA
C08464
Fig. 55 - RTU-MP Power Exhaust Connections
SW3 Protocol Selection
DS6 DS5
OFF OFF
PROTOCOL
DS8
DS7
DS4
DS3
DS2
DS1
BACnet MS/TP
(Master)
Unused
OFF
ON
OFF
Select Baud Select Baud
Select Baud Select Baud
Modbus
(Slave)
Unused
OFF
OFF
ON
ON
OFF
N2
Unused
Unused
OFF
ON
OFF
ON
OFF
OFF
ON
ON
ON
OFF
OFF
OFF
OFF
(Slave)
LonWorks
OFF
NOTE:
DS = Dip Switch
BACnet MS/TP SW3 example shown
Baud Rate Selections
BAUD RATE
9600
DS2
OFF
ON
DS1
OFF
OFF
ON
19,200
38,400
OFF
ON
76,800
ON
C07166
Fig. 56 - RTU-MP SW3 Dip Switch Settings
31
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Local Access —
Virtual BACview: Virtual BACview is a freeware computer
program that functions as the BACview6 Handheld. The
USB Link interface (USB-L) is required to connect a
computer to the RTU-MP board. The link cable connects
a USB port to the J12 local access port. This program
functions and operates identical to the handheld.
BACview6 Handheld: The BACview6 is a keypad/display
interface used to connect to the RTU-MP to access the
control information, read sensor values, and test the RTU,
see Fig. 57. This is an accessory interface that does not
come with the MP controller and can only be used at the
unit. Connect the BACview6 to the RTU-MP’s J12 local
access port. There are 2 password protected levels in the
display (User and Admin). The user password is defaulted
to 0000 but can be changed. The Admin password is 1111
and cannot be changed. There is a 10 minute auto logout
if a screen is idle. See Form 48-50H-T-2T, Appendix A
for navigation and screen content.
RTU-MP Troubleshooting —
Communication LEDs: The LEDs indicate if the
controller is speaking to the devices on the network. The
LEDs should reflect communication traffic based on the
baud rate set. The higher the baud rate the more solid the
LEDs will appear.
C07170
Fig. 57 - BACview6 Handheld Connections
32
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Table 9 – LEDs
The LEDs on the RTU-MP show the status of certain functions
If this LED is on...
Status is...
Power
Rx
Tx
The RTU MP has power
The RTU MP is receiving data from the network segment
The RTU MP is transmitting data over the network segment
The digital output is active
DO#
The Run and Error LEDs indicate control module and network status
If Run LED shows...
And Error LED shows...
Status is...
2 flashes per second
Off
Normal
2 flashes,
2 flashes per second
2 flashes per second
2 flashes per second
2 flashes per second
Five minute auto---restart delay after system error
Control module has just been formatted
alternating with Run LED
3 flashes,
then off
4 flashes,
then pause
Two or more devices on this network have the
same ARC156 network address
Exec halted after frequent system errors or
control programs halted
On
5 flashes per second
5 flashes per second
On
Off
Exec start---up aborted, Boot is running
Firmware transfer in progress, Boot is running
7 flashes per second, alternating with
7 flashes per second
14 flashes per second
Ten second recovery period after brownout
Run LED
14 flashes per second,
alternating with Run LED
Brownout
Failure. Try the following solutions:
S
S
S
S
Turn the RTU---MP off, then on.
Form at the R TU --- M P.
Download memory to the RTU---MP.
Replace the RTU---MP.
On
On
NOTE:
Refer to Form 48-50H-T-2T for complete
to shut down the rooftop unit in order to prevent smoke
from circulating throughout the building. It is not to be
used as a life saving device.
configuration of RTU-MP, operating sequences and
troubleshooting information. Refer to RTU-MP 3rd Party
Integration Guide for details on configuration and
troubleshooting of connected networks. Have a copy of these
manuals available at unit start-up.
Controller —
The controller (see Fig. 58) includes a controller housing,
a printed circuit board, and a clear plastic cover. The
controller can be connected to one or two compatible duct
smoke sensors. The clear plastic cover is secured to the
housing with a single captive screw for easy access to the
wiring terminals. The controller has three LEDs (for
Power, Trouble and Alarm) and a manual test/reset button
(on the cover face).
Smoke Detectors
Smoke detectors are available as factory-installed options on
50HCQ models. Smoke detectors may be specified for
Supply Air only or for Return Air without or with
economizer or in combination of Supply Air and Return Air.
Return Air smoke detectors are arranged for vertical return
configurations only. All components necessary for operation
are factory-provided and mounted. The unit is
factory-configured for immediate smoke detector shutdown
operation; additional wiring or modifications to unit terminal
board may be necessary to complete the unit and smoke
detector configuration to meet project requirements.
Sensor —
The sensor (see Fig. 59) includes a plastic housing, a
printed circuit board, a clear plastic cover, a sampling
tube inlet and an exhaust tube. The sampling tube (when
used) and exhaust tube are attached during installation.
The sampling tube varies in length depending on the size
of the rooftop unit. The clear plastic cover permits visual
inspections without having to disassemble the sensor. The
cover attaches to the sensor housing using four captive
screws and forms an airtight chamber around the sensing
electronics. Each sensor includes a harness with an RJ45
terminal for connecting to the controller. Each sensor has
four LEDs (for Power, Trouble, Alarm and Dirty) and a
manual test/reset button (on the left-side of the housing).
Units equipped with factory-optional Return Air smoke
detectors require a relocation of the sensor module at unit
installation. See “Completing Installation of Return Air
Smoke Sensor:” on page 35 for details.
System —
The smoke detector system consists of a four-wire
controller and one or two sensors. Its primary function is
33
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Air is introduced to the duct smoke detector sensor’s
sensing chamber through a sampling tube that extends into
the HVAC duct and is directed back into the ventilation
system through a (shorter) exhaust tube. The difference in
air pressure between the two tubes pulls the sampled air
through the sensing chamber. When a sufficient amount of
smoke is detected in the sensing chamber, the sensor
signals an alarm state and the controller automatically
takes the appropriate action to shut down fans and
blowers, change over air handling systems, notify the fire
alarm control panel, etc.
Duct smoke sensor
controller
Conduit nuts
(supplied by installer)
Conduit support plate
The sensor uses a process called differential sensing to
prevent gradual environmental changes from triggering false
alarms. A rapid change in environmental conditions, such as
smoke from a fire, causes the sensor to signal an alarm state
but dust and debris accumulated over time does not.
Terminal block cover
Cover gasket
(ordering option)
Controller housing
and electronics
Controller cover
Conduit couplings
(supplied by installer)
Fastener
(2X)
For installations using two sensors, the duct smoke
detector does not differentiate which sensor signals an
alarm or trouble condition.
Trouble
Alarm
Power
Smoke Detector Locations
Supply Air —
Test/reset
switch
The Supply Air smoke detector sensor is located to the left
of the unit’s indoor (supply) fan. See Fig. 60. Access is
through the fan access panel. There is no sampling tube used
at this location. The sampling tube inlet extends through the
side plate of the fan housing (into a high pressure area). The
controller is located on a bracket to the right of the return
filter, accessed through the lift-off filter panel.
C08208
Fig. 58 - Controller Assembly
Duct smoke sensor
Exhaust tube
Exhaust gasket
Sensor housing
and electronics
See
Detail A
Intake
gasket
Cover gasket
(ordering option)
TSD-CO2
(ordering option)
Sensor cover
Plug
Smoke Detector Sensor
Sampling tube
(ordered separately)
C08245
Fig. 60 - Typical Supply Air Smoke Detector Sensor
Location
Coupling
Detail A
Return Air without Economizer —
Magnetic
test/reset
switch
The sampling tube is located across the return air opening
on the unit basepan. See Fig. 61. The holes in the
sampling tube face downward, into the return air stream.
The sampling tube is connected via tubing to the return air
sensor that is mounted on a bracket high on the partition
between return filter and controller location. (This sensor
is shipped in a flat-mounting location. Installation
requires that this sensor be relocated to its operating
Alarm
Trouble
Power
Dirty
C08209
Fig. 59 - Smoke Detector Sensor
34
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location and the tubing to the sampling tube be connected.
See “Completing Installation of Return Air Smoke
Sensor:” for details.)
Completing Installation of Return Air Smoke Sensor:
1. Unscrew the two screws holding the Return Air
Sensor detector plate. See Fig. 63. Save the screws.
Return Air Detector module
(shipping position shown)*
Controller
Screws
Controller module
Flexible
Exhaust
Tubes
Sampling Tube
Return Air Detector Sampling Tube
C10331
*RA detector must be moved from shipping position to operating position by installer
Fig. 63 - Return Air Detector Shipping Position
C07307
Fig. 61 - Typical Return Air Detector Location
2. Remove the Return Air Sensor and its detector plate.
3. Rotate the detector plate so the sensor is facing out-
wards and the sampling tube connection is on the bot-
tom. See Fig. 64.
Return Air with Economizer —
The sampling tube is inserted through the side plates of
the economizer housing, placing it across the return air
opening on the unit basepan. See Fig. 62. The holes in the
sampling tube face downward, into the return air stream.
The sampling tube is connected via tubing to the return air
sensor that is mounted on a bracket high on the partition
between return filter and controller location. (This sensor
is shipped in a flat-mounting location. Installation
requires that this sensor be relocated to its operating
location and the tubing to the sampling tube be connected.
See the following installation procedure.)
Flexible
Exhaust Tube
Sampling Tube
C10332
Fig. 64 - Return Air Sensor Operating Position
4. Screw the sensor and detector plate into its operating
position using screws from Step 1. Make sure the
sampling tube connection is on the bottom and the ex-
haust tube is on the top. See Fig. 64.
5. Connect the flexible tube on the sampling inlet to the
sampling tube on the basepan.
Return Air
Sampling Tube
Additional Application Data —
Refer to Catalog No. HKRNKA-1XA for discussions on
additional control features of these smoke detectors
including multiple unit coordination.
C10330
Fig. 62 - Return Air Sampling Tube Location
35
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Table 10 – Unit Wire/Fuse or HACR Breaker Sizing Data
ELEC. HTR
P.E.
NO C.O. or UNPWR C.O.
NO P.E.
w/P.E. (pwrd fr/unit)
FUSE
NOM
(KW)
FUSE
DISC. SIZE
DISC. SIZE
CRHEATER***
FLA
FLA
or
or
MCA
MCA
HACR
BRKR
HACR
BRKR
FLA
29
LRA
FLA
LRA
NONE
101A00
102A00
103B00
104B00
102A00,102A00
NONE
---
3.3/4.4
4.9/6.5
6.5/8.7
7.9/10.5
9.8/13.0
---
---
29.2
49.0/52.0
58.5/63.0
68.4/74.5
76.5/83.9
87.8/96.9
21.4
45
60/60
60/70
70/80
80/90
90/100
30
88
31.1
50.9/53.9
60.4/64.9
70.3/76.4
78.4/85.8
89.7/98.8
23.3
45
60/60
70/70
80/80
80/90
90/100
30
31
49/52
58/62
67/73
75/81
85/93
24
90
106/108
114/117
121/126
128/134
184/198
84
15.9/18.3
23.5/27.1
31.4/36.3
37.9/43.8
46.9/54.2
---
47/50 104/106
56/60 112/115
65/70 119/124
72/79 126/132
83/91 182/196
1.9
1.9
1.9
1.9
22
82
101A00
102A00
103B00
104B00
105A00
NONE
3.3/4.4
4.9/6.5
6.5/8.7
7.9/10.5
12.0/16.0
---
9.2/10.6
13.6/15.6
18.1/20.9
21.9/25.3
33.4/38.5
---
32.9/34.7
38.4/40.9
44.0/47.5
48.8/53.0
63.2/69.5
19.2
40/40
45/45
45/50
50/60
70/70
25
32/34
37/40
91/93
96/98
34.8/36.6
40.3/42.8
45.9/49.4
50.7/54.9
65.1/71.4
21.1
40/40
45/45
50/50
60/60
70/80
30
34/36
39/42
45/48
49/53
62/68
21
93/95
98/100
102/105
106/109
117/123
96
42/46 100/103
47/51 104/107
60/66 115/121
19
94
101A00
102A00
103B00
104B00
105A00
NONE
3.3/4.4
4.9/6.5
6.5/8.7
7.9/10.5
12.0/16.0
---
9.2/10.6
13.6/15.6
18.1/20.9
21.9/25.3
33.4/38.5
---
30.7/32.5
36.2/38.7
41.8/45.3
46.6/50.8
61.0/67.3
19.2
35/40
40/45
45/50
50/60
70/70
25
30/31 103/105
35/37 108/110
40/43 112/115
44/48 116/119
58/63 127/133
32.6/34.4
38.1/40.6
43.7/47.2
48.5/52.7
62.9/69.2
21.1
40/40
45/45
45/50
50/60
70/70
30
32/33
37/39
42/45
46/50
60/66
21
105/107
110/112
114/117
118/121
129/135
107
19
105
101A00
102A00
103B00
104B00
105A00
NONE
3.3/4.4
4.9/6.5
6.5/8.7
7.9/10.5
12.0/16.0
---
9.2/10.6
13.6/15.6
18.1/20.9
21.9/25.3
33.4/38.5
---
30.7/32.5
36.2/38.7
41.8/45.3
46.6/50.8
61.0/67.3
11.8
35/40
40/45
45/50
50/60
70/70
15
30/31 114/116
35/37 119/121
40/43 123/126
44/48 127/130
58/63 138/144
32.6/34.4
38.1/40.6
43.7/47.2
48.5/52.7
62.9/69.2
12.8
40/40
45/45
45/50
50/60
70/70
15
32/33
37/39
42/45
46/50
60/66
13
116/118
121/123
125/128
129/132
140/146
44
12
20
24
28
31
10
19
22
26
30
10
19
22
26
30
43
50
54
57
60
48
55
59
62
65
54
61
65
68
71
106A00
107A00
108A00
109A00
NONE
6.0
7.2
20.8
25
21.8
25
21
51
8.8
10.6
25.0
25
26.0
30
25
55
1.0
1.0
1.0
11.5
13.8
29.0
30
30.0
30
29
58
14.0
16.8
32.8
35
33.8
35
32
61
---
---
10.4
15
11.4
15
11
49
106A00
107A00
108A00
109A00
NONE
6.0
7.2
19.4
20
20.4
25
20
56
8.8
10.6
23.6
25
24.6
25
24
60
11.5
13.8
27.6
30
28.6
30
27
63
14.0
16.8
31.4
35
32.4
35
31
66
---
---
10.4
15
11.4
15
11
55
106A00
107A00
108A00
109A00
6.0
7.2
19.4
20
20.4
25
20
62
8.8
10.6
23.6
25
24.6
25
24
66
11.5
13.8
27.6
30
28.6
30
27
69
14.0
16.8
31.4
35
32.4
35
31
72
NONE
NONE
NONE
---
---
---
---
---
---
1.9
1.9
1.9
9.3
7.7
7.3
15
15
15
10
8
42
45
49
11.2
9.6
15
15
15
12
10
9
44
47
51
7
9.2
NOTE: See page 42 for table legend and notes.
36
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Table 10 — Unit Wire/Fuse or HACR Breaker Sizing Data (cont)
ELEC. HTR
P.E.
w/ PWRD C.O.
NO P.E.
w/P.E. (pwrd fr/unit)
FUSE
NOM
(KW)
FUSE
DISC. SIZE
DISC. SIZE
CRHEATER***
FLA
FLA
or
or
MCA
MCA
HACR
BRKR
HACR
BRKR
FLA
LRA
FLA
LRA
NONE
101A00
102A00
103B00
104B00
102A00,102A00
NONE
---
3.3/4.4
4.9/6.5
6.5/8.7
7.9/10.5
9.8/13.0
---
---
34.0
53.8/56.8
63.3/67.8
73.2/79.3
81.3/88.7
92.6/101.7
26.2
50
34
93
35.9
55.7/58.7
65.2/69.7
75.1/81.2
83.2/90.6
94.5/103.6
28.1
50
60/60
70/70
80/90
90/100
100/110
35
36
55/58
63/68
73/78
80/87
90/99
29
95
111/113
119/122
126/131
133/139
189/203
89
15.9/18.3
23.5/27.1
31.4/36.3
37.9/43.8
46.9/54.2
---
60/60
70/70
80/80
90/90
53/55 109/111
61/65 117/120
70/76 124/129
78/85 131/137
1.9
1.9
1.9
1.9
100/110 88/97 187/201
30
45/45
50/50
50/60
60/60
70/80
30
27
87
101A00
102A00
103B00
104B00
105A00
NONE
3.3/4.4
4.9/6.5
6.5/8.7
7.9/10.5
12.0/16.0
---
9.2/10.6
13.6/15.6
18.1/20.9
21.9/25.3
33.4/38.5
---
37.7/39.5
43.2/45.7
48.8/52.3
53.6/57.8
68.0/74.3
24.0
38/39
96/98
39.6/41.4
45.1/47.6
50.7/54.2
55.5/59.7
69.9/76.2
25.9
45/45
50/50
60/60
60/60
70/80
30
40/42
45/47
50/53
55/58
68/74
27
98/100
103/105
107/110
111/114
122/128
101
43/45 101/103
48/51 105/108
52/56 109/112
66/71 120/126
25
99
101A00
102A00
103B00
104B00
105A00
NONE
3.3/4.4
4.9/6.5
6.5/8.7
7.9/10.5
12.0/16.0
---
9.2/10.6
13.6/15.6
18.1/20.9
21.9/25.3
33.4/38.5
---
35.5/37.3
41.0/43.5
46.6/50.1
51.4/55.6
65.8/72.1
24.0
40/45
45/50
50/60
60/60
70/80
30
35/37 108/110
40/43 113/115
45/49 117/120
50/54 121/124
63/69 132/138
37.4/39.2
42.9/45.4
48.5/52.0
53.3/57.5
67.7/74.0
25.9
45/45
45/50
50/60
60/60
70/80
30
37/39
42/45
48/51
52/56
65/71
27
110/112
115/117
119/122
123/126
134/140
112
25
110
101A00
102A00
103B00
104B00
105A00
NONE
3.3/4.4
4.9/6.5
6.5/8.7
7.9/10.5
12.0/16.0
---
9.2/10.6
13.6/15.6
18.1/20.9
21.9/25.3
33.4/38.5
---
35.5/37.3
41.0/43.5
46.6/50.1
51.4/55.6
65.8/72.1
14.0
40/45
45/50
50/60
60/60
70/80
20
35/37 119/121
40/43 124/126
45/49 128/131
50/54 132/135
63/69 143/149
37.4/39.2
42.9/45.4
48.5/52.0
53.3/57.5
67.7/74.0
15.0
45/45
45/50
50/60
60/60
70/80
20
37/39
42/45
48/51
52/56
65/71
16
121/123
126/128
130/133
134/137
145/151
46
14
23
27
30
34
13
21
25
29
32
13
21
25
29
32
45
52
56
59
62
50
57
61
64
67
56
63
67
70
73
106A00
107A00
108A00
109A00
NONE
6.0
7.2
23.0
25
24.0
25
24
53
8.8
10.6
27.2
30
28.2
30
28
57
1.0
1.0
1.0
11.5
13.8
31.2
35
32.2
35
31
60
14.0
16.8
35.0
35
36.0
40
35
63
---
---
12.6
15
13.6
20
14
51
106A00
107A00
108A00
109A00
NONE
6.0
7.2
21.6
25
22.6
25
22
58
8.8
10.6
25.8
30
26.8
30
26
62
11.5
13.8
29.8
30
30.8
35
30
65
14.0
16.8
33.6
35
34.6
35
33
68
---
---
12.6
15
13.6
20
14
57
106A00
107A00
108A00
109A00
6.0
7.2
21.6
25
22.6
25
22
64
8.8
10.6
25.8
30
26.8
30
26
68
11.5
13.8
29.8
30
30.8
35
30
71
14.0
16.8
33.6
35
34.6
35
33
74
NONE
NONE
NONE
---
---
---
---
---
---
1.9
1.9
1.9
11.0
9.4
15
15
15
12
10
9
44
47
51
12.9
11.3
10.9
15
15
15
14
12
11
46
49
53
9.0
NOTE: See page 42 for table legend and notes.
37
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Table 10 — Unit Wire/Fuse or HACR Breaker Sizing Data (cont)
ELEC. HTR
P.E.
NO C.O. or UNPWR C.O.
NO P.E.
w/P.E. (pwrd fr/unit)
FUSE
NOM
(KW)
FUSE
DISC. SIZE
DISC. SIZE
CRHEATER***
FLA
FLA
or
or
MCA
MCA
HACR
BRKR
HACR
BRKR
FLA
LRA
FLA
LRA
NONE
101A00
---
3.3/4.4
6.5/8.7
9.8/13.0
13.1/17.4
15.8/21.0
---
---
33.6
50
33
119
35.5
50
35
121
15.9/18.3
31.4/36.3
46.9/54.2
62.8/72.5
75.8/87.5
---
53.4/56.4
72.8/78.9
92.2/101.3
60/60
80/80
100/110
51/54
69/75
87/95
135/137
150/155
55.3/58.3
74.7/80.8
60/60
80/90
53/56
71/77
89/97
137/139
152/157
215/229
103B00
1.9
102A00,102A00
103B00,103B00
104B00,104B00
NONE
213/227 94.1/103.2 100/110
112.1/124.2 125/125 105/116 245/264 114.0/126.1 125/150 107/118 247/266
128.3/142.9 150/150 120/134 271/294 130.2/144.8 150/150 122/136 273/296
25.2
42.2/44.7
47.8/51.3
66.9/73.3
79.9/88.3
23.0
30
50/50
50/60
70/80
80/90
30
25
41/43
46/49
64/69
76/83
23
93
107/109
111/114
126/132
181/194
105
27.1
44.1/46.6
49.7/53.2
68.8/75.2
81.8/90.2
24.9
40
50/50
50/60
70/80
90/100
30
27
43/45
48/51
66/72
78/85
25
95
109/111
113/116
128/134
183/196
107
102A00
4.9/6.5
6.5/8.7
12.0/16.0
15.8/21.0
---
13.6/15.6
18.1/20.9
33.4/38.5
43.8/50.5
---
103B00
1.9
1.9
1.9
1.0
1.0
1.0
105A00
104B00,104B00
NONE
102A00
4.9/6.5
6.5/8.7
12.0/16.0
15.8/21.0
---
13.6/15.6
18.1/20.9
33.4/38.5
43.8/50.5
---
40.0/42.5
45.6/49.1
64.7/71.1
77.7/86.1
23.0
45/50
50/50
70/80
80/90
30
38/41
43/47
61/67
73/81
23
119/121
123/126
138/144
193/206
116
41.9/44.4
47.5/51.0
66.6/73.0
79.6/88.0
24.9
50/50
50/60
70/80
80/90
30
40/43
46/49
63/69
75/83
25
121/123
125/128
140/146
195/208
118
103B00
105A00
104B00,104B00
NONE
102A00
4.9/6.5
6.5/8.7
12.0/16.0
15.8/21.0
---
13.6/15.6
18.1/20.9
33.4/38.5
43.8/50.5
---
40.0/42.5
45.6/49.1
64.7/71.1
77.7/86.1
12.4
45/50
50/50
70/80
80/90
15
38/41
43/47
61/67
73/81
13
130/132
134/137
149/155
204/217
47
41.9/44.4
47.5/51.0
66.6/73.0
79.6/88.0
13.4
50/50
50/60
70/80
80/90
15
40/43
46/49
63/69
75/83
14
132/134
136/139
151/157
206/219
48
103B00
105A00
104B00,104B00
NONE
106A00
6.0
7.2
21.4
25
21
54
22.4
25
22
55
108A00
11.5
13.8
29.7
30
28
61
30.7
35
30
62
109A00
14.0
16.8
33.4
35
32
64
34.4
35
33
65
108A00,108A00
NONE
23.0
27.7
47.1
50
44
102
48.1
50
46
103
---
---
11.0
15
11
52
12.0
15
12
53
106A00
6.0
7.2
20.0
25
19
59
21.0
25
20
60
108A00
11.5
13.8
28.3
30
27
66
29.3
30
28
67
109A00
14.0
16.8
32.0
35
30
69
33.0
35
31
70
108A00,108A00
NONE
23.0
27.7
45.7
50
43
107
46.7
50
44
108
---
---
11.0
15
11
58
12.0
15
12
59
106A00
6.0
7.2
20.0
25
19
65
21.0
25
20
66
108A00
11.5
13.8
28.3
30
27
72
29.3
30
28
73
109A00
14.0
16.8
32.0
35
30
75
33.0
35
31
76
108A00,108A00
23.0
27.7
45.7
50
43
113
46.7
50
44
114
NONE
NONE
NONE
---
---
---
---
---
---
1.9
1.9
1.9
10.3
8.7
15
15
15
11
9
39
42
46
12.2
10.6
10.2
15
15
15
13
11
10
41
44
48
8.3
8
NOTE: See page 42 for table legend and notes.
38
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Table 10 — Unit Wire/Fuse or HACR Breaker Sizing Data (cont)
ELEC. HTR
P.E.
w/ PWRD C.O.
NO P.E.
w/P.E. (pwrd fr/unit)
FUSE
NOM
(KW)
FUSE
DISC. SIZE
DISC. SIZE
CRHEATER***
FLA
FLA
or
or
MCA
MCA
HACR
BRKR
HACR
BRKR
FLA
LRA
FLA
LRA
NONE
101A00
---
3.3/4.4
6.5/8.7
9.8/13.0
13.1/17.4
15.8/21.0
---
---
38.4
50
38
124
40.3
60
41
126
15.9/18.3
31.4/36.3
46.9/54.2
62.8/72.5
75.8/87.5
---
58.2/61.2
77.6/83.7
60/70
80/90
57/59
75/80
140/142
155/160
60.1/63.1
79.5/85.6
70/70
80/90
59/62
77/82
142/144
157/162
103B00
1.9
102A00,102A00
103B00,103B00
104B00,104B00
NONE
97.0/106.1 100/110
92/101 218/232 98.9/108.0 100/110
95/103 220/234
116.9/129.0 125/150 111/122 250/269 118.8/130.9 125/150 113/124 252/271
133.1/147.7 150/150 126/139 276/299 135.0/149.6 150/150 128/141 278/301
30.0
47.0/49.5
52.6/56.1
71.7/78.1
84.7/93.1
27.8
40
50/50
60/60
80/80
90/100
40
31
46/49
52/55
69/75
81/89
28
98
112/114
116/119
131/137
186/199
110
31.9
48.9/51.4
54.5/58.0
73.6/80.0
86.6/95.0
29.7
40
50/60
60/60
80/90
90/100
40
33
49/51
54/57
71/77
83/91
30
100
114/116
118/121
133/139
188/201
112
102A00
4.9/6.5
6.5/8.7
12.0/16.0
15.8/21.0
---
13.6/15.6
18.1/20.9
33.4/38.5
43.8/50.5
---
103B00
1.9
1.9
1.9
1.0
1.0
1.0
105A00
104B00,104B00
NONE
102A00
4.9/6.5
6.5/8.7
12.0/16.0
15.8/21.0
---
13.6/15.6
18.1/20.9
33.4/38.5
43.8/50.5
---
44.8/47.3
50.4/53.9
69.5/75.9
82.5/90.9
27.8
50/50
60/60
70/80
90/100
40
44/46
49/52
67/72
79/86
28
124/126
128/131
143/149
198/211
121
46.7/49.2
52.3/55.8
71.4/77.8
84.4/92.8
29.7
50/50
60/60
80/80
90/100
40
46/48
51/54
69/75
81/88
30
126/128
130/133
145/151
200/213
123
103B00
105A00
104B00,104B00
NONE
102A00
4.9/6.5
6.5/8.7
12.0/16.0
15.8/21.0
---
13.6/15.6
18.1/20.9
33.4/38.5
43.8/50.5
---
44.8/47.3
50.4/53.9
69.5/75.9
82.5/90.9
14.6
50/50
60/60
70/80
90/100
20
44/46
49/52
67/72
79/86
15
135/137
139/142
154/160
209/222
49
46.7/49.2
52.3/55.8
71.4/77.8
84.4/92.8
15.6
50/50
60/60
80/80
90/100
20
46/48
51/54
69/75
81/88
16
137/139
141/144
156/162
211/224
50
103B00
105A00
104B00,104B00
NONE
106A00
6.0
7.2
23.6
25
23
56
24.6
25
24
57
108A00
11.5
13.8
31.9
35
31
63
32.9
35
32
64
109A00
14.0
16.8
35.6
40
34
66
36.6
40
36
67
108A00,108A00
NONE
23.0
27.7
49.3
50
47
104
50.3
60
48
105
---
---
13.2
15
13
54
14.2
20
15
55
106A00
6.0
7.2
22.2
25
22
61
23.2
25
23
62
108A00
11.5
13.8
30.5
35
29
68
31.5
35
30
69
109A00
14.0
16.8
34.2
35
33
71
35.2
40
34
72
108A00,108A00
NONE
23.0
27.7
47.9
50
45
109
48.9
50
46
110
---
---
13.2
15
13
60
14.2
20
15
61
106A00
6.0
7.2
22.2
25
22
67
23.2
25
23
68
108A00
11.5
13.8
30.5
35
29
74
31.5
35
30
75
109A00
14.0
16.8
34.2
35
33
77
35.2
40
34
78
108A00,108A00
23.0
27.7
47.9
50
45
115
48.9
50
46
116
NONE
NONE
NONE
---
---
---
---
---
---
1.9
1.9
1.9
12.0
10.4
10.0
15
15
15
13
11
10
41
44
48
13.9
12.3
11.9
20
15
15
15
13
12
43
46
50
NOTE: See page 42 for table legend and notes.
39
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Table 10 — Unit Wire/Fuse or HACR Breaker Sizing Data (cont)
ELEC. HTR
P.E.
NO C.O. or UNPWR C.O.
NO P.E.
w/P.E. (pwrd fr/unit)
FUSE
NOM
(KW)
FUSE
DISC. SIZE
DISC. SIZE
CRHEATER***
FLA
FLA
or
or
MCA
MCA
HACR
BRKR
HACR
BRKR
FLA
LRA
FLA
LRA
NONE
102A00
---
4.9/6.5
6.5/8.7
9.8/13.0
13.1/17.4
15.8/21.0
---
---
40.1
60
39
144
42.0
60
41
146
23.5/27.1
31.4/36.3
46.9/54.2
62.8/72.5
75.8/87.5
---
69.4/73.9
79.3/85.4
80/80
80/100
66/70
75/81
168/171
175/180
71.3/75.8
81.2/87.3
80/80
90/100
68/72
77/83
170/173
177/182
103B00
1.9
1.9
1.9
1.9
1.0
1.0
1.0
102A00,102A00
103B00,103B00
104B00,104B00
NONE
98.7/107.8 100/110
93/101 238/252 100.6/109.7 110/110
95/103 240/254
118.6/130.7 125/150 111/122 270/289 120.5/132.6 125/150 113/124 272/291
134.8/149.4 150/150 126/139 296/319 136.7/151.3 150/175 128/142 298/321
28.7
40
28
120
30.6
45
31
122
102A00
4.9/6.5
7.9/10.5
12.0/16.0
15.8/21.0
19.9/26.5
---
13.6/15.6
21.9/25.3
33.4/38.5
43.8/50.5
55.2/63.8
---
45.7/48.2
56.1/60.3
70.4/76.8
83.4/91.8
50/60
60/70
80/80
90/100
44/46
54/58
67/73
79/86
134/136
142/145
153/159
208/221
47.6/50.1
58.0/62.2
72.3/78.7
85.3/93.7
60/60
60/70
80/80
90/100
46/49
56/60
69/75
81/89
136/138
144/147
155/161
210/223
104B00
105A00
104B00,104B00
104B00,105A00
NONE
97.7/108.4 100/110
92/102 230/248 99.6/110.3 100/125
94/104 232/250
26.5
40
26
143
28.4
40
28
145
102A00
4.9/6.5
7.9/10.5
12.0/16.0
15.8/21.0
19.9/26.5
---
13.6/15.6
21.9/25.3
33.4/38.5
43.8/50.5
55.2/63.8
---
43.5/46.0
53.9/58.1
68.2/74.6
81.2/89.6
50/50
60/60
70/80
90/90
42/44
51/55
64/70
76/84
89/99
29
157/159
165/168
176/182
231/244
45.4/47.9
55.8/60.0
70.1/76.5
83.1/91.5
50/50
60/60
80/80
90/100
44/46
53/57
66/72
78/86
159/161
167/170
178/184
233/246
104B00
105A00
104B00,104B00
104B00,105A00
NONE
95.5/106.2 100/110
253/271 97.4/108.1 100/110
92/101 255/273
28.8
40
169
30.7
45
31
171
102A00
4.9/6.5
7.9/10.5
12.0/16.0
15.8/21.0
19.9/26.5
---
13.6/15.6
21.9/25.3
33.4/38.5
43.8/50.5
55.2/63.8
---
45.8/48.3
56.2/60.4
70.5/76.9
83.5/91.9
50/60
60/70
80/80
90/100
44/46
54/58
67/73
79/87
183/185
191/194
202/208
257/270
47.7/50.2
58.1/62.3
72.4/78.8
85.4/93.8
60/60
60/70
80/80
90/100
46/49
56/60
69/75
81/89
185/187
193/196
204/210
259/272
104B00
105A00
104B00,104B00
104B00,105A00
NONE
97.8/108.5 100/110
92/102 279/297 99.7/110.4 100/125
94/104 281/299
13.6
22.6
30.8
34.6
48.2
51.9
12.2
21.2
29.4
33.2
46.8
50.5
13.0
22.0
30.2
34.0
47.6
51.3
20
25
35
35
50
60
15
25
30
35
50
60
15
25
35
35
50
60
14
22
29
33
45
49
12
20
28
31
44
47
13
21
29
32
45
48
58
65
14.6
23.6
31.8
35.6
49.2
52.9
13.2
22.2
30.4
34.2
47.8
51.5
14.0
23.0
31.2
35.0
48.6
52.3
20
25
35
40
50
60
20
25
35
35
50
60
20
25
35
35
50
60
15
23
31
34
47
50
13
21
29
32
45
48
14
22
30
33
46
49
59
66
106A00
6.0
7.2
108A00
11.5
13.8
72
73
109A00
14.0
16.8
75
76
108A00,108A00
108A00,109A00
NONE
23.0
27.7
113
119
69
114
120
70
25.5
30.7
---
---
106A00
6.0
7.2
76
77
108A00
11.5
13.8
83
84
109A00
14.0
16.8
86
87
108A00,108A00
108A00,109A00
NONE
23.0
27.7
124
130
82
125
131
83
25.5
30.7
---
---
106A00
6.0
7.2
89
90
108A00
11.5
13.8
96
97
109A00
14.0
16.8
99
100
138
144
108A00,108A00
108A00,109A00
23.0
27.7
137
143
25.5
30.7
NONE
NONE
NONE
---
---
---
---
---
---
1.9
1.9
1.9
11.2
9.2
15
15
15
11
9
46
53
64
13.1
11.1
11.9
15
15
15
14
11
12
48
55
66
10.0
10
NOTE: See page 42 for table legend and notes.
40
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Table 10 — Unit Wire/Fuse or HACR Breaker Sizing Data (cont)
ELEC. HTR
P.E.
w/ PWRD C.O.
NO P.E.
w/P.E. (pwrd fr/unit)
FUSE
NOM
(KW)
FUSE
DISC. SIZE
DISC. SIZE
CRHEATER****
FLA
FLA
or
or
MCA
MCA
HACR
BRKR
HACR
BRKR
FLA
LRA
FLA
LRA
NONE
102A00
---
4.9/6.5
6.5/8.7
9.8/13.0
13.1/17.4
15.8/21.0
---
---
44.9
60
44
149
46.8
60
47
151
23.5/27.1
31.4/36.3
46.9/54.2
62.8/72.5
75.8/87.5
---
74.2/78.7
84.1/90.2
80/80
71/76
81/86
173/176
180/185
76.1/80.6
86.0/92.1
80/90
74/78
83/88
175/178
182/187
103B00
100/100
100/100
1.9
1.9
1.9
1.9
1.0
1.0
1.0
102A00,102A00
103B00,103B00
104B00,104B00
NONE
103.5/112.6 110/125
98/107 243/257 105.4/114.5 110/125 101/109 245/259
123.4/135.5 125/150 117/128 275/294 125.3/137.4 150/150 119/130 277/296
139.6/154.2 150/175 132/145 301/324 141.5/156.1 150/175 134/147 303/326
33.5
45
34
125
35.4
50
36
127
102A00
4.9/6.5
7.9/10.5
12.0/16.0
15.8/21.0
19.9/26.5
---
13.6/15.6
21.9/25.3
33.4/38.5
43.8/50.5
55.2/63.8
---
50.5/53.0
60.9/65.1
75.2/81.6
88.2/96.6
60/60
70/70
80/90
90/100
50/52
59/63
72/78
84/92
139/141
147/150
158/164
213/226
52.4/54.9
62.8/67.0
77.1/83.5
90.1/98.5
60/60
70/70
80/90
100/100
52/54
61/65
75/80
86/94
141/143
149/152
160/166
215/228
104B00
105A00
104B00,104B00
104B00,105A00
NONE
102.5/113.2 110/125
97/107 235/253 104.4/115.1 110/125 100/109 237/255
31.3
45
31
148
33.2
50
34
150
102A00
4.9/6.5
7.9/10.5
12.0/16.0
15.8/21.0
19.9/26.5
---
13.6/15.6
21.9/25.3
33.4/38.5
43.8/50.5
55.2/63.8
---
48.3/50.8
58.7/62.9
73.0/79.4
86.0/94.4
60/60
60/70
80/80
90/100
47/49
57/60
70/76
82/89
162/164
170/173
181/187
236/249
50.2/52.7
60.6/64.8
74.9/81.3
87.9/96.3
60/60
70/70
80/90
90/100
49/52
59/63
72/78
84/92
164/166
172/175
183/189
238/251
104B00
105A00
104B00,104B00
104B00,105A00
NONE
100.3/111.0 110/125
95/105 258/276 102.2/112.9 110/125
97/107 260/278
33.6
45
34
174
35.5
50
36
176
102A00
4.9/6.5
7.9/10.5
12.0/16.0
15.8/21.0
19.9/26.5
---
13.6/15.6
21.9/25.3
33.4/38.5
43.8/50.5
55.2/63.8
---
50.6/53.1
61.0/65.2
75.3/81.7
88.3/96.7
60/60
70/70
80/90
90/100
50/52
59/63
72/78
84/92
188/190
196/199
207/213
262/275
52.5/55.0
62.9/67.1
77.2/83.6
90.2/98.6
60/60
70/70
80/90
100/100
52/54
61/65
75/81
87/94
190/192
198/201
209/215
264/277
104B00
105A00
104B00,104B00
104B00,105A00
NONE
102.6/113.3 110/125
98/107 284/302 104.5/115.2 110/125 100/110 286/304
15.8
24.8
33.0
36.8
50.4
54.1
14.4
23.4
31.6
35.4
49.0
52.7
15.2
24.2
32.4
36.2
49.8
53.5
20
25
35
40
60
60
20
25
35
40
50
60
20
25
35
40
50
60
16
24
32
35
48
51
14
23
30
34
46
50
15
24
31
35
47
51
60
67
16.8
25.8
34.0
37.8
51.4
55.1
15.4
24.4
32.6
36.4
50.0
53.7
16.2
25.2
33.4
37.2
50.8
54.5
20
30
35
40
60
60
20
25
35
40
50
60
20
30
35
40
60
60
17
26
33
37
49
53
16
24
32
35
47
51
17
25
32
36
48
52
61
68
106A00
6.0
7.2
108A00
11.5
13.8
74
75
109A00
14.0
16.8
77
78
108A00,108A00
108A00,109A00
NONE
23.0
27.7
115
121
71
116
122
72
25.5
30.7
---
---
106A00
6.0
7.2
78
79
108A00
11.5
13.8
85
86
109A00
14.0
16.8
88
89
108A00,108A00
108A00,109A00
NONE
23.0
27.7
126
132
84
127
133
85
25.5
30.7
---
---
106A00
6.0
7.2
91
92
108A00
11.5
13.8
98
99
109A00
14.0
16.8
101
139
145
102
140
146
108A00,108A00
108A00,109A00
23.0
27.7
25.5
30.7
NONE
NONE
NONE
---
---
---
---
---
---
1.9
1.9
1.9
12.9
10.9
11.7
15
15
15
13
11
12
48
55
66
14.8
12.8
13.6
20
15
15
16
13
14
50
57
68
NOTE: See page 42 for table legend and notes.
41
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Legend and Notes for Table 10
LEGEND:
Example: Supply voltage is 230-3-60
BRKR
CO
--- Circuit breaker
AB = 224 v
BC = 231 v
AC = 226 v
--- Convenient outlet
--- Direct drive
DD
indoor fan motor
DISC
--- Disconnect
FLA
--- Full load amps
(224 + 231 + 226)
681
3
Average Voltage =
=
IFM
--- Indoor fan motor
--- Locked rotor amps
--- Minimum circuit amps
--- Po w e r e x h a u st
3
LRA
MCA
=
227
P E
Determine maximum deviation from average voltage.
(AB) 227 – 224 = 3 v
(BC) 231 – 227 = 4 v
(AC) 227 – 226 = 1 v
Maximum deviation is 4 v.
PWRD CO
UNPWR CO
NOTES:
--- Powered convenient outlet
--- Unpowered convenient outlet
1. In compliance with NEC requirements for multimotor and
combination load equipment (refer to NEC Articles 430 and
440), the overcurrent protective device for the unit shall be
fuse or HACR breaker. Canadian units may be fuse or circuit
breaker.
Determine percent of voltage imbalance.
4
% Voltage Imbalance
= 100 x
= 1.76%
227
2. Unbalanced 3-Phase Supply Voltage
Never operate a motor where a phase imbalance in supply
voltage is greater than 2%. Use the following formula to de-
termine the percentage of voltage imbalance.
This amount of phase imbalance is satisfactory as it is below the
maximum allowable 2%.
IMPORTANT: If the supply voltage phase imbalance is more than
2%, contact your local electric utility company immediately.
max voltage deviation from average voltage
% Voltage Imbalance = 100 x
average voltage
Unit Without Economizer or
2 Position Damper
Economizer
2 Position Damper
C08631
Fig. 65 - EconoMi$ert IV Wiring
EconoMi$er IV Occupancy Switch —
Step 11 — Adjust Factory--Installed Options
Smoke Detectors —
Refer to Fig. 65 for general EconoMi$er IV wiring.
External occupancy control is managed through a
connection on the Central Terminal Board.
Smoke detector(s) will be connected at the Central
Terminal Board (CTB), at terminals marked “Smoke
Shutdown”. Remove jumper JMP 3 when ready to
energize unit.
If external occupancy control is desired, connect a time
clock or remotely controlled switch (closed for Occupied,
open for Unoccupied sequence) at terminals marked
OCCUPANCY on CTB. Remove or cut jumper JMP 2 to
complete the installation.
42
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Step 12 — Install Accessories
Available accessories include:
Roof Curb
Thru-base connection kit (must be installed before unit
is set on curb)
Pre--Start and Start--Up
This completes the mechanical installation of the unit.
Refer to the unit’s Service Manual for detailed Pre-Start
and Start-up instructions.
Manual outside air damper
Two-Position motorized outside air damper
EconoMi$er IV (with control and integrated barometric
relief)
EconoMi$er2 (without control/for external signal and
integrated barometric relief)
Power Exhaust
Differential dry-bulb sensor (EconoMi$er IV)
Outdoor enthalpy sensor
Differential enthalpy sensor
Time Guard II compressor anti-cycle control
Outdoor coil hail guard
Outdoor coil protector grille
Head pressure control
Programmable setback thermostat
Electrical/Mechanical thermostat and subbase
Electric Heaters
Single Point kits
Thermostat / Sensors
CO2 sensor
DDC interface (PremierLink)
Louvered hail guard
Phase monitor control
Refer to separate installation instructions for information
on installing these accessories.
43
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Catalog No: 50HCQ---01SI
Copyright 2010 Carrier Corp. D 7310 W. Morris St. D Indianapolis, IN 46231
Printed in U.S.A.
Edition Date: 04/10
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Replaces: NEW
44
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