Carrier 50HCQA Instruction manual

50HCQ
Single Package Rooftop
Heat Pump
with Puronr (R---410A) Refrigerant
Sizes 07 --- 09
Installation Instructions
NOTE: Read the entire instruction manual before starting
the installation
TABLE OF CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . 2
Unit without Thru-- Base Connection Kit . . . . . . . 16
Heat Anticipator Settings . . . . . . . . . . . . . . . . . . . 16
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Electric Heaters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Jobsite Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Single Point Boxes and Supplementary Fuses . . . . . 18
Step 1 - Plan for Unit Location . . . . . . . . . . . . . . . . . . 6
PremierLinkt (Factory Option) . . . . . . . . . . . . . . . . . 19
Roof Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Supply Air Temperature (SAT) Sensor . . . . . . . . . 19
Step 2 - Plan for Sequence of Unit Installation . . . . . . 7
Outdoor Air Temperature (OAT) Sensor . . . . . . . 21
Curb-- Mount Installation . . . . . . . . . . . . . . . . . . . . . 7
EconoMi$ert2 . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Pad-- Mount Installation . . . . . . . . . . . . . . . . . . . . . . 7
Field Connections . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Frame-- Mount Installation . . . . . . . . . . . . . . . . . . . . 7
Space Temperature (SPT) Sensors . . . . . . . . . . . . 21
Step 3 - Inspect Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Connect Thermostat . . . . . . . . . . . . . . . . . . . . . . . 21
Step 4 - Provide Unit Support . . . . . . . . . . . . . . . . . . . 7
Configure the Unit for Thermostat Mode . . . . . . 24
Roof Curb Mount . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Economizer Controls . . . . . . . . . . . . . . . . . . . . . . . . 24
Slab Mount (Horizontal Units Only) . . . . . . . . . . . 7
Outdoor Air Enthalpy Control . . . . . . . . . . . . . . . 24
Alternate Unit Support . . . . . . . . . . . . . . . . . . . . . . 7
Differential Enthalpy Control . . . . . . . . . . . . . . . . 24
Step 5 - Field Fabricate Ductwork . . . . . . . . . . . . . . . . 9
Return Air Enthalpy Sensor . . . . . . . . . . . . . . . . . 24
For Units with Accessory Electric Heaters . . . . . . 9
Indoor Air Quality (CO2 sensor) . . . . . . . . . . . . . 24
Step 6 - Rig and Place Unit . . . . . . . . . . . . . . . . . . . . . 9
Outdoor Air Quality Sensor . . . . . . . . . . . . . . . . . 25
Positioning on Curb . . . . . . . . . . . . . . . . . . . . . . . 10
Smoke Detector/Fire Shutdown (FSD) . . . . . . . . . 25
Step 7 - Convert to Horizontal & Connect Ductwork . 10
Filter Status Switch . . . . . . . . . . . . . . . . . . . . . . . . 26
Step 8 - Install Outside Air Hood . . . . . . . . . . . . . . . 11
Supply Fan Status Switch . . . . . . . . . . . . . . . . . . . 26
Economizer Hood Removal and Setup . . . . . . . . 11
Remote Occupied Switch . . . . . . . . . . . . . . . . . . . 26
Two Position Damper Hood Removal and Setup . . 11
Space Relative Humidity Sensor . . . . . . . . . . . . . 26
Economizer Hood and Two-- Position Hood . . . . . 12
Power Exhaust (output) . . . . . . . . . . . . . . . . . . . . . 26
Step 9 - Install External Condensate Trap and Line . . . 12
CCN Communication Bus . . . . . . . . . . . . . . . . . . 26
Step 10 - Make Electrical Connections . . . . . . . . . . . 13
RTU-- MP Control System . . . . . . . . . . . . . . . . . . . . . . 28
Field Power Supply . . . . . . . . . . . . . . . . . . . . . . . . 13
Supply Air Temperature (SAT) Sensor . . . . . . . . . 30
Units without Factory-- Installed Disconnect . . . . 13
Outdoor Air Temperature (OAT) Sensor . . . . . . . 30
Units with Factory-- Installed Disconnect . . . . . . . 14
EconoMi$ert2 . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Convenience Outlets . . . . . . . . . . . . . . . . . . . . . . . 14
Field Connections . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Factory-- Option Thru-- Base Connections . . . . . . . 15
Space Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Units without Thru-- Base Connections . . . . . . . . . 16
Economizer Controls . . . . . . . . . . . . . . . . . . . . . . . . 31
Field Control Wiring . . . . . . . . . . . . . . . . . . . . . . . 16
Outdoor Air Enthalpy Control . . . . . . . . . . . . . . . 31
Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
1
Differential Enthalpy Control . . . . . . . . . . . . . . . . 31
!
Return Air Enthalpy Sensor . . . . . . . . . . . . . . . . . 31
Indoor Air Quality (CO2 sensor) . . . . . . . . . . . . . 32
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could cause personal
injury or death.
Before performing service or maintenance operations
on unit, always turn off main power switch to unit and
install lockout tag. Unit may have more than one
power switch.
Outdoor Air Quality Sensor . . . . . . . . . . . . . . . . . 32
Connecting Discrete Inputs . . . . . . . . . . . . . . . . . . 32
Communication Wiring - Protocols . . . . . . . . . . . . 33
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Local Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
RTU-- MP Troubleshooting . . . . . . . . . . . . . . . . . . 34
Smoke Detectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
!
System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
UNIT OPERATION AND SAFETY HAZARD
Failure to follow this warning could cause personal
injury, death and/or equipment damage.
Puronr (R-- 410A) refrigerant systems operate at
higher pressures than standard R-- 22 systems. Do not
use R-- 22 service equipment or components on Puron
refrigerant equipment.
Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
50HCQ
WARNING
Smoke Detector Locations . . . . . . . . . . . . . . . . . . . . 36
Supply Air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Return Air without Economizer . . . . . . . . . . . . . . 36
Return Air with Economizer . . . . . . . . . . . . . . . . . 37
Step 11 - Adjust Factory-- Installed Options . . . . . . . . 44
Step 12 - Install Accessories . . . . . . . . . . . . . . . . . . . 45
!
SAFETY CONSIDERATIONS
WARNING
PERSONAL INJURY AND ENVIRONMENTAL
HAZARD
Failure to follow this warning could cause personal
injury or death.
Relieve pressure and recover all refrigerant before
system repair or final unit disposal.
Wear safety glasses and gloves when handling
refrigerants. Keep torches and other ignition sources
away from refrigerants and oils.
Improper installation, adjustment, alteration, service,
maintenance, or use can cause explosion, fire, electrical
shock or other conditions which may cause personal
injury or property damage. Consult a qualified installer,
service agency, or your distributor or branch for
information or assistance. The qualified installer or
agency must use factory-- authorized kits or accessories
when modifying this product. Refer to the individual
instructions packaged with the kits or accessories when
installing.
!
Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloths for brazing operations and
have a fire extinguisher available. Read these instructions
thoroughly and follow all warnings or cautions attached to
the unit. Consult local building codes and appropriate
national electrical codes (in USA, ANSI/NFPA70,
National Electrical Code (NEC); in Canada, CSA C22.1)
for special requirements.
CAUTION
CUT HAZARD
Failure to follow this caution may result in personal
injury.
Sheet metal parts may have sharp edges or burrs. Use
care and wear appropriate protective clothing, safety
glasses and gloves when handling parts and servicing
heat pump units.
It is important to recognize safety information. This is the
. When you see this symbol on the
safety-- alert symbol
unit and in instructions or manuals, be alert to the
potential for personal injury.
Understand the signal words DANGER, WARNING,
CAUTION, and NOTE. These words are used with the
safety-- alert symbol. DANGER identifies the most serious
hazards which will result in severe personal injury or
death. WARNING signifies hazards which could result in
personal injury or death. CAUTION is used to identify
unsafe practices, which may result in minor personal
injury or product and property damage. NOTE is used to
highlight suggestions which will result in enhanced
installation, reliability, or operation.
2
50HCQ
Vertical Connections / Economizer
Horizontal Connections / Economizer
Fig. 1 - Unit Dimensional Drawing: 07 — 08 Size Units
3
C10464
50HCQ
Fig. 1 - Unit Dimensional Drawing: 07 — 08 Size Unit (cont.)
4
C10465
50HCQ
Vertical Connections / Economizer
Horizontal Connections / Economizer
Fig. 2 - Unit Dimensional Drawing: 09 Size Units
5
C10460
50HCQ
C10461
Fig. 2 - Unit Dimensional Drawing: 09 Size Unit (cont.)
INSTALLATION
Jobsite Survey
1
Complete the following checks before installation.
18” (457)
1. Consult local building codes and the NEC (National
Electrical Code) ANSI/NFPA 70 for special installation requirements.
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.
42" (1067)
18" (457)
42" (1067)
Step 1 — Plan for Unit Location
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. 3.
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.
Do not install unit in an indoor location. Do not locate air
inlets near exhaust vents or other sources of contaminated
air.
1
Required bottom condensate drain connection.
Otherwise, 36” (914mm) for condensate connection.
C07459
Fig. 3 - Service Clearance Dimensional Drawing
Although unit is weatherproof, avoid locations that permit
water from higher level runoff and overhangs to fall onto
the unit.
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.
6
Roof Mount —
Step 3 — Inspect unit
Check building codes for weight distribution
requirements. Unit operating weight is shown in Table 1.
Inspect unit for transportation damage. File any claim
with transportation agency.
Step 2 — Plan for Sequence of Unit Installation
Confirm before installation of unit that voltage, amperage
and circuit protection requirements listed on unit data
plate agree with power supply provided.
Curb-- Mounted Installation —
Install curb
Install field-- fabricated ductwork inside curb
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)
Rig and place unit
Install outdoor air hood
Install condensate line trap and piping
Make electrical connections
Install other accessories
Pad-- Mounted Installation —
Prepare pad and unit supports
Check and tighten the bottom condensate drain
connection plug
Rig and place unit
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
Install other accessories
Frame-- Mounted Installation —
Frame-- mounted applications generally follow the
sequence for a curb installation. Adapt as required to
suit specific installation plan.
Step 4 — Provide Unit Support
Roof Curb Mount —
Accessory roof curb details and dimensions are shown in
Fig. 4. Assemble and install accessory roof curb in
accordance with instructions shipped with the 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. 4. Improperly applied
gasket can also result in air leaks and poor unit
performance.
Curb should be level. This is necessary for unit drain to
function properly. Unit leveling tolerances are show in
Fig. 5. Refer to Accessory Roof Curb Installation
Instructions for additional information as required.
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.
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.
Slab Mount (Horizontal Units Only) —
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.
Alternate Unit Support (In Lieu of Curb or Slab
Mount) —
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
50HCQ
Component
UNITS LB (KG)
A07
D08
D09
710 (322)
875 (397)
1020 (463)
Vertical
80 (36)
80 (36)
80 (36)
Horizontal
105 (48)
105 (48)
105 (48)
Powered Outlet
32 (15)
32 (15)
32 (15)
14--- in / 356 mm
110 (50)
110 (50)
110 (50)
24--- in / 610 mm
145 (66)
145 (66)
145 (66)
Base Unit
Economizer
Curb
7
50HCQ
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.
*
50HCQ 07-09
UNIT SIZE
50HCQ
Fig. 4 - Roof Curb Details: Size 07 — 09 Units
8
C10462
!
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)
B-C
1.0” (25)
A-C
1.0” (25)
Fig. 5 - Unit Leveling Tolerances
C06110
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.
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.
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. 6 for additional information.
Lifting holes are provided in base rails as shown in Fig. 6.
Refer to rigging instructions on unit.
Ducts passing through unconditioned spaces must be
insulated and covered with a vapor barrier.
!
UNIT DAMAGE HAZARD
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.
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.
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.
CAUTION
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.
9
50HCQ
A-B
0.5” (13)
WARNING
PLACE ALL SEAL STRIP IN PLACE
BEFORE PLACING UNIT ON ROOF CURB.
“B”
REQUIRED
SPREADER
BARS
914-1371
(36"-54")
DUCT END
“C”
DETAIL “A”
“A”
SEE DETAIL “A”
C10410
50HCQ
UNIT
50HCQA07
50HCQD08
50HCQD09
MAX WEIGHT
LB
1100
1315
1505
KG
500
598
684
DIMENSIONS
B
IN
MM
40.8
1035
41.6
1057
40.0
1015
A
IN
88.0
88.0
88.0
MM
2235
2235
2235
C
IN
41.5
49.5
49.5
MM
1055
1257
1257
NOTES:
1. SPREADER BARS REQUIRED to lift and transport the unit. Top damage will occur if spreader bars are not used.
2. Dimensions in ( ) are millimeters.
3. 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. 6 - Rigging Details
Positioning on Curb —
Position unit on roof curb so that the following clearances
are maintained: 1/4 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. 4, 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.
Step 7 — Convert to Horizontal and Connect
Ductwork (when required)
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. 7.
Fig. 7 - Horizontal Conversion Panels
C06108
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.
Do not cover or obscure visibility to the unit’s informative
data plate when insulating horizontal ductwork.
10
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. 8.)
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. 10.) 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 12.
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. 8.)
3. Locate and cut the (2) plastic tie-- wraps, being careful
to not damage any wiring. (See Fig. 9.)
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 12.
FILTER ACCESS PANEL
Remove Hood Parts
Cut Plastic Ties
(2) Places
COMPRESSOR
ACCESS PANEL
Economizer
OUTDOOR-AIR OPENING AND
INDOOR COIL ACCESS PANEL
Fig. 8 - Typical Access Panel Locations
C06023
Fig. 9 - Economizer Wiring
C08633
Hood Parts
Plastic Tie Wrap
Qty (2)
Screws for Metal Tray
Qty (2)
Fig. 10 - Damper Assembly
11
C08639
50HCQ
Two Position Damper Hood Removal and Setup Factory Option —
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. 13.
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 bottom of the indoor coil access panel. See Fig. 11.
DIVIDER
OUTSIDE
AIR
HOOD
SIDE
PANEL
50HCQ
CLEANABLE
ALUMINUM
FILTER
FILTER
BAROMETRIC
RELIEF
FILTER
CLIP
INDOOR
COIL
ACCESS
PANEL
TOP
SIDE
PANEL
CAULK
HERE
Fig. 13 - Economizer Filter Installation
6. Caulk the ends of the joint between the unit top panel
and the hood top.
7. Replace the filter access panel.
INDOOR
COIL
ACCESS
PANEL
C06025
Fig. 11 - Indoor Coil Access Panel Relocation
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. 12.
C08634
Step 9 — Install External Condensate Trap and
Line
The unit has one 3/4-in. condensate drain connection on
the end of the condensate pan and an alternate connection
on the bottom. See Fig. 14. Unit airflow configuration
does not determine which drain connection to use. Either
drain connection can be used with vertical or horizontal
applications.
TOP
PANEL
INDOOR COIL
ACCESS PANEL
LEFT
HOOD
SIDE
SCREW
19 1/16”
B
CONDENSATE PAN (SIDE VIEW)
STANDARD
DRAIN PLUG
SIDE DRAIN
(FACTORY-INSTALLED)
(483mm)
33 3/8”
Fig. 14 - Condensate Drain Pan (Side View)
(848mm)
HOOD DIVIDER
Fig. 12 - Economizer Hood Construction
ALTERNATE
BOTTOM DRAIN
C06026
3. Remove the shipping tape holding the economizer barometric relief damper in place.
4. Insert the hood divider between the hood sides. See
Fig. 12 and 13. 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
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.
To use the alternate bottom drain connection, remove the
red drain plug from the bottom connection (use a 1/2 - in.
square socket drive extension) and install it in the side
drain connection.
The piping for the condensate drain and external trap can
be completed after the unit is in place. See Fig. 15.
12
BASE RAIL
OPEN
VENT
2˝ (51) MIN
TO ROOF
DRAIN
SEE NOTE
DRAIN PLUG
ROOF
CURB
NOTE: Trap should be deep enough to offset maximum unit static
difference. A 4” (102) trap is recommended
.
Fig. 15 - Condensate Drain Piping Details
C08022
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.).
Step 10 — Make Electrical Connections
!
WARNING
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.
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. 17)
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.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
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
Electrical
Code
CSA
[Canadian
Standards
Association] C22.1), and local electrical codes.
!
FIRE HAZARD
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. 16.)
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
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
WARNING
ALUMINUM
WIRE
Fig. 16 - Disconnect Switch and Unit
A93033
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.
13
50HCQ
MINIMUM PITCH
1” (25mm) PER
10’ (3m) OF LINE
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.
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. 17).
!
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal
injury or death.
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.
Units Without Disconnect Option
IFC
(3 Phase
Indoor Motor)
C
11
13
13
TB
(1 Phase Indoor Motor
and 1 Phase Unit)
Two types of convenience outlets are offered on 50HCQ
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. 18.
50HCQ
Disconnect
per
NEC
L1
L2
WARNING
L3
208/230-3-60
460-3-60
575-3-60
Pwd-CO
Transformer
Convenience
Outlet
GFCI
Units With Disconnect Option
L1
2
L2
4
L3
6
Pwd-CO
Fuse
Switch
1
Optional
Disconnect
Switch
3
Factory
Wiring
5
Disconnect factory test leads; discard.
Fig. 17 - Power Wiring Connections
Control Box
Access Panel
C10468
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. 17 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.
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.
All field wiring must comply with the NEC and local
requirements.
Fig. 18 - Convenience Outlet Location
C08128
Installing Weatherproof Cover: A weatherproof
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.
The weatherproof cover kit is shipped in the unit’s control
box. The kit includes the hinged cover, a backing plate
and gasket.
DISCONNECT ALL POWER
CONVENIENCE OUTLET.
TO
UNIT
AND
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).
14
COVER – WHILE-IN-USE
WEATHERPROOF
RECEPTACLE
NOT INCLUDED
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.
50HCQ
Mount the weatherproof cover to the backing plate as
shown in Fig. 19. 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.
BASE PLATE FOR
GFCI RECEPTACLE
Fig. 19 - Weatherproof Cover Installation
C09022
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-- 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. 18.
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. 20.
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).
C08283
UNIT
VOLTAGE
CONNECT
AS
PRIMARY
CONNECTIONS
TRANSFORMER
TERMINALS
208,
230
240
L1: RED +YEL
L2: BLU + GRA
H1 + H3
H2 + H4
460
480
L1: RED
Splice BLU +
YEL
L2: GRA
H1
H2 + H3
H4
575
600
L1: RED
L2: GRA
H1
H2
Fig. 20 - 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.
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 —
This service connection kit consists of a 1/2 - in electrical
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/ - in bulkhead connector enables the low-- voltage control
2
wires to pass through the basepan. The 3/4 - in electrical
bulkhead connector allows the high-- voltage power wires
to pass through the basepan. See Fig. 21.
Check tightness of connector lock nuts before connecting
electrical conduits.
15
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
CONNECTOR
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.
HIGH VOLTAGE
CONDUIT
CONNECTOR
50HCQ
Fig. 21 - Thru-- Base Connection Fittings
C08637
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.
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.
Typical
Thermostat
Connections
X
Units without Thru-- Base Connections —
1. Install power wiring conduit through side panel openings. Install conduit between disconnect and control
box.
2. Install power lines to terminal connections as shown
in Fig. 17.
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 44) 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.
Thermostat —
Install a Carrier-- approved accessory 2 stage
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
C
C
G
G
W2
W2
(Note 2)
W1
W1
O/B/Y2
Y2
(Note 1)
Y1
Y1
R
R
T
H
E
R
M
O
S
T
A
T
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. 22 - Typical Low-- Voltage Control Connections
Field Control Wiring —
The 50HCQ unit requires an external temperature control
device. This device can be a thermostat (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).
Central
Terminal
Board
Unit without Thru-- Base Connection Kit —
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. 23.
NOTE: If thru-- the-- bottom connections accessory is
used, refer to the accessory installation instructions for
information on routing power and control wiring.
Heat Anticipator Settings —
Set heat anticipator settings at 0.14 amp for the first stage
and 0.14 amp for second-- stage heating, when available.
16
RACEWAY
DISCONNECT MOUNTING
LOCATION
INDOOR
ACCESS
PANEL
OUTDOOR
ACCESS PANEL
Fig. 24 - Typical Access Panel Location
HOLE IN END PANEL (HIDDEN)
Fig. 23 - Field Control Wiring Raceway
C08027
C08133
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.
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).
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. 24, Fig. 25 and Fig. 26.
Table 2 – Heater Model Number
Bare Heater Model Number
C
R
H
E
A
T
E
R
0
0
1
A
0
0
Heater Sales Package PNO
Includes:
Bare Heater
Carton and packing materials
Installation sheet
C
R
H
E
A
T
E
R
1
0
1
A
0
0
DISCONNECT
MOUNTING
LOCATION
EMT OR RIGID CONDUIT SINGLE
(FIELD-SUPPLIED)
POINT BOX
CENTER MANUAL RESET
POST
LIMIT SWITCH
HEATER
COVERS
SINGLE POINT
MAIN
BRACKET AND BOX
HEATER
HEATER
HEATER
CONTROL CONDUIT
MOUNTING
MODULE
MODULE
MOUNTING
BOX
DRIP BOOT
SCREW
(LOCATION 1) (LOCATION 2) BRACKET
CONTROL WIRE TERMINAL BLOCK
Fig. 25 - Typical Component Location
17
C08134
50HCQ
UNIT BLOCK-OFF
PANEL
21
11
23
13
CONTROL
BOX
BUSHING
SINGLE
POINT BOX
MOUNTING
SCREWS
DRIP BOOT
BRACKET
MOUNTING
SCREWS
TRACK
POWER
WIRES
21
23
11
FOAM
BUSHING
13
FLANGE
ALLIED PA
CORP.
MODEL NO.
OD
ERIAL NO.
22.2
ISTED AIR
NDITIONING
UIP ACCESS
346N
23
.
P/N
2-
1
3
5610-4
REV
HEATER
RELAYS
50HCQ
HEATER
MOUNTING
SCREWS
C08135
Fig. 26 - Typical Module Installation
Fig. 27 - Typical Single Point Installation
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.)
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. 28.
Single Point Boxes and Supplementary Fuses
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. 27. 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.
DEFROST
BOARD
E-HEAT
ORN
P3-3
BRN
TB4
ORN
BRN
1
3
VIO
C08136
BRN BRN
VIO
Field
Connections
Elec Htr
VIO HR2
BRN
HR1
BRN
VIO
HR1: On Heater 1 in Position #1
HR2: On Heater 2 in Position #2 (if installed)
C09013
Fig. 28 - Accessory Electric Heater Control Connections
18
50HCQ
PremierLinkt (Factory--Option)
C08199
Fig. 29 - PremierLink Controller
The PremierLink controller (see Fig. 29) 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 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$ert2 package.
The PremierLink controller requires the use of
electronic thermostat or a CCN connection
broadcast to initiate its internal timeclock.
necessary for broadcast of time of day
(occupied/unoccupied).
a Carrier
for time
This is
functions
NOTE: PremierLink controller is shipped in Sensor
mode. To be used with a thermostat, the PremierLink
controller must be configured to Thermostat mode. Refer
to PremierLink Configuration instructions for Operating
Mode.
Supply Air Temperature (SAT) Sensor —
On FIOP--equipped 50HCQ unit, the unit is supplied with a
supply--air temperature (SAT) sensor (33ZCSENSAT). This
sensor is a tubular probe type, approx 6--inches (152.4 mm)
in length. It is a nominal 10--k ohm thermistor.
The SAT is factory-- wired. The SAT probe is wire-- tied to
the supply-- air opening (on the horizontal opening end) in
its shipping position. Remove the sensor for installation.
Re-- position the sensor in the flange of the supply-- air
opening or in the supply air duct (as required by local
codes). Drill or punch a 1/2 - in. hole in the flange or duct.
Use two field-- supplied, self-- drilling screws to secure the
sensor probe in a horizontal orientation. See Fig. 30.
SUPPLY AIR
TEMPERATURE
SENSOR
ROOF
CURB
SUPPLY AIR
RETURN AIR
C08200
Fig. 30 - Typical Mounting Location for Supply Air
Temperature (SAT) Sensor on Small Rooftop Units
NOTE:
Refer to Form 33CS-- 58SI for complete
PremierLink configuration, operating sequences and
troubleshooting information. Have a copy of this manual
available at unit start-- up.
NOTE: The sensor must be mounted in the discharge
airstream downstream of the cooling coil and any heating
devices. Be sure the probe tip does not come in contact
with any of the unit’s heater surfaces.
19
50HCQ
Fig. 31 - Typical PremierLink Wiring Schematic
20
C10469
Outdoor Air Temperature (OAT) Sensor —
The OAT is factory-- mounted in the EconoMi$er2 (FIOP
or accessory). It is a nominal 10k ohm thermistor attached
to an eyelet mounting ring.
Connect T-- 55: See Fig. 32 for typical T-- 55 internal
connections. Connect the T-- 55 SEN terminals to TB1
terminals 1 and 3 (see Fig. 33).
EconoMi$ert2 —
The PremierLink control is used with EconoMi$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.
Enthalpy control (outdoor air or differential sensors)
Space CO2 sensor
Outdoor air CO2 sensor
PL
SEN
1
J6-7
SEN
3
J6-6
Fig. 33 - PremierLink T-- 55 Sensor
C08212
Connect T-- 56: See Fig. 34 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. 35).
50HCQ
Outdoor air management functions can be enhanced with
field-- installation of these accessory control devices:
TB1
Refer to Table 3 for accessory part numbers.
Field Connections
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. 31). Some input devices also require a
24-- vac signal source; connect at CTB terminal R at
“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).
1
2
3
4
5
SEN
SW1
6
RED(+)
WHT(GND)
BLK(-)
CCN COM
SET
BLK
(T56)
BRN (GND)
BLU (SPT)
SENSOR WIRING
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
Fig. 34 - 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.
SEN
SEN
TB1
PL
1
J6-7
TB1
3
PL
J6-6
5
J6-5
Jumper
SET
SET
Fig. 35 - PremierLink T-- 56 Sensor
1
2
3
4
5
6
RED(+)
WHT(GND)
BLK(-)
C08213
CCN COM
Connect Thermostat —
SENSOR WIRING
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. 36.
SEN
SW1
BRN (GND)
BLU (SPT)
C08202
C08201
Fig. 32 - T-- 55 Space Temperature 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.
21
SPACE
THERMOSTAT
CTB
THERMOSTAT
R
R
TB1
G
2
PL
J4-12
Y1
4
J4-10
Y2
6
J4-8
W1
8
J4-6
W2
10
J4-4
C
C
CTB
THERMOSTAT
C08119
50HCQ
Fig. 36 - Space Thermostat Connections
Table 3 – PremierLink Sensor Usage
APPLICATION
OUTDOOR AIR
TEMPERATURE
SENSOR
RETURN AIR
TEMPERATURE
SENSOR
OUTDOOR AIR
ENTHALPY SENSOR
RETURN AIR
ENTHALPY SENSOR
Differential Dry Bulb
Temperature with
PremierLink
(PremierLink requires
4---20 mA Actuator)
Included --CRTEMPSN001A00
Required --33ZCT55SPT
or equivalent
---
---
Single Enthalpy with
PremierLink
(PremierLink requires
4---20mA Actuator)
Included --Not Used
---
Requires --33CSENTHSW
---
Differential Enthalpy
with PremierLink
(PremierLink requires
4---20mA Actuator)
Included --Not Used
---
Requires --33CSENTHSW
or equivalent
Requires --33CSENTSEN
or equivalent
NOTES:
CO2 Sensors (Optional):
33ZCSENCO2 --- Room sensor (adjustable). Aspirator box is required for duct mounting of the sensor.
33ZCASPCO2 --- Aspirator box used for duct--- mounted CO2 room sensor.
33ZCT55CO2 --- Space temperature and CO2 room sensor with override.
33ZCT56CO2 --- Space temperature and CO2 room sensor with override and setpoint.
22
TB1 TERMINAL
FIELD CONNECTION
INPUT SIGNAL
1
T55---SEN/T56---SEN
Analog (10k thermistor)
2
RMTOCC
Discrete, 24VAC
3
T55---SEN/T56---SEN
Analog (10k thermistor)
4
CMPSAFE
Discrete, 24VAC
5
T56---SET
Analog (10k thermistor)
6
FSD
Discrete, 24VAC
7
LOOP---PWR
Analog, 24VDC
LEGEND:
T55
T56
CCN
CMPSAFE
FILTER
8
SPS
Discrete, 24VAC
9
IAQ ---SEN
Analog, 4---20mA
10
FILTER
Discrete, 24VAC
11
IAQ ---COM/OAQ ---COM/RH ---COM
Analog, 4---20mA
12
CCN + (RED)
Digital, , 5VDC
13
OAQ ---SEN/RH ---SEN
Analog, 4---20mA
14
CCN Gnd (WHT)
Digital, 5VDC
15
AUX OUT(Power Exhaust)
(Output)Discrete 24VAC
16
CCN --- (BLK)
Digital, 5VDC
-----------
Space Temperature Sensor
Space Temperature Sensor
Carrier Comfort Network (communication bus)
Compressor Safety
Dirty Filter Switch
FSD --IAQ --OAQ --RH --SFS ---
Fire Shutdown
Indoor Air Quality (CO2)
Outdoor Air Quality (CO2)
Relative Humidity
Supply Fan Status
Table 5 – Thermostat Mode
TB1 TERMINAL
FIELD CONNECTION
INPUT SIGNAL
1
RAT SEN
Analog (10k thermistor)
2
G
Discrete, 24VAC
3
RAT SEN
Analog (10k thermistor)
4
Y1
Discrete, 24VAC
6
Y2
Discrete, 24VAC
7
LOOP---PWR
Analog, 24VDC
5
LEGEND:
CCN
--G
--IAQ
--OAQ
--RAT
---
8
W1
Discrete, 24VAC
9
IAQ ---SEN
Analog, 4---20mA
10
W2
Discrete, 24VAC
11
IAQ ---COM/OAQ ---COM/RH ---COM
Analog, 4---20mA
12
CCN + (RED)
Digital, 5VDC
13
OAQ ---SEN/RH ---SEN
Analog, 4---20mA
14
CCN Gnd (WHT)
Digital, 5VDC
15
AUX OUT (Power Exhaust)
(Output) Discrete 24VAC
16
CCN --- (BLK)
Digital, 5VDC
Carrier Comfort Network (communication bus)
Thermostat Fan
Indoor Air Quality (CO2)
Outdoor Air Quality (CO2)
Return Air Temperature
RH
W1
W2
Y1
Y2
23
-----------
Relative Humidity
Thermostat Heat Stage 1
Thermostat Heat Stage 2
Thermostat Cool Stage 1
Thermostat Cool Stage 2
50HCQ
Table 4 – Space Sensor Mode
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. 32) 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. 33.
Differential Enthalpy Control —
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. 38.
50HCQ
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.
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 —
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).
24V
RED
– 4-20
Main
GND
BLK
+ VDC
Out
LOW
GRA
ECONO
MOTOR
ESL
Economizer Controls
Outdoor Air Enthalpy Control
(PNO 33CSENTHSW) —
+ 24-36
VDC In
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. 37.)
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. 38. Connect the
enthalpy control power input terminals to economizer
actuator power leads RED (connect to 24V) and BLK
(connect to GND).
– 4-20 Main
Out
C09027
Fig. 38 - Outside and Return Air Enthalpy Sensor
Wiring
To wire the return air enthalpy sensor, perform the
following:
1. Use a 2-- conductor, 18 or 20 AWG, twisted pair cable
to connect the return air enthalpy sensor to the enthalpy 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 enthalpy sensor and the (-- ) terminal on the enthalpy
controller.
Enthalpy
Switch
24V
RED
GND
BLK
LOW
GRA
ECONO
MOTOR
ESL
7
CTB
ECON
Factory Wiring Harness
C09026
Fig. 37 - Enthalpy Switch (33CSENTHSW) Connections
The outdoor enthalpy changeover setpoint is set at the
enthalpy controller.
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.
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. 39 for typical
CO2 sensor wiring schematic.
24
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) —
+ 0-10VDC
- SIG COM
+ 4-20mA
ALARM
NC
COM RELAY
NO CONTACTS
}
2 1
J3
8765432 1
J4
50HCQ
H G 24 VAC
OR
+ - 24 VDC
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. 41. The outdoor air CO2 sensor must be located in the
economizer outside air hood.
C08635
Fig. 39 - 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.
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.
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
sensor. See Fig. 39. Connect the 4-- 20 mA terminal to
terminal TB1-- 9 and connect the SIG COM terminal to
terminal TB1-- 11. See Fig. 40.
COVER REMOVED
Fig. 41 - Outdoor Air Quality Sensor Cover
SEN
PL
J5-5
COM
TB1
11
J5-3
C07135
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.
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. 39. 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
50HCQ. See Fig. 42.
OAQ Sensor/RH Sensor
IAQ Sensor
TB1
9
SIDE VIEW
SEN
TB1
13
PL
J5-2
COM
TB1
11
J5-3
24 VAC
Fig. 42 - Outdoor CO2 Sensor Connections
C08275
24 VAC
Fig. 40 - Indoor CO2 Sensor (33ZCSENCO2)
Connections
C08636
Smoke Detector/Fire Shutdown (FSD) —
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.
25
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. 31, the PremierLink
wiring schematic.
Fan (Pressure) Switch (NO, close on rise in pressure)
CTB
Thermostat
R
TB1
8
C08118
Fig. 44 - PremierLink Wiring Fan Pressure Switch
Connection
Filter Status Switch —
This function is available only when PremierLink is
configured for (Space) Sensor Mode.
50HCQ
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. 43.
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.
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.
Remote Occupied
CTB
Thermostat
R
Time Clock
TB1
2
Filter Switch (NO, close on rising pressure (high drop))
CTB
Thermostat
R
TB1
10
PL
J4-6
PL
J4-12
C08214
Fig. 45 - PremierLink Wiring Remote Occupied
PL
J4-4
C08216
Fig. 43 - PremierLink Filter Switch Connection
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”.
Using Filter Timer Hours: Refer to Form 33CS-- 58SI for
instructions on using the PremierLink Configuration
screens and on unit alarm sequence.
Refer to Form 33CS-- 58SI for additional information on
configuring the PremierLink control for Door Switch
timer function.
Space Relative Humidity Sensor —
The RH sensor is not used with 50HCQ models at this
time.
Power Exhaust (output) —
Connect the accessory Power Exhaust contactor coils(s)
per Fig. 46.4
Supply Fan Status Switch —
Power Exhaust
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.
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.
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. 44.
PEC
TAN
TB1
15
GRA
CTB
THERMOSTAT
C
PL
J8-3
C08120
Fig. 46 - PremierLink Power Exhaust Output
Connection
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
26
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.
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.
Table 7 – Color Code Recommendations
NOTE: Carrier device default is 9600 band.
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.
See Table 6 for recommended cable.
Table 6 – Recommended Cables
MANUFACTURER
CABLE PART NO.
Alpha
2413 or 5463
American
A22503
Belden
8772
Columbia
02525
SIGNAL TYPE
CCN BUS WIRE
COLOR
CCN PLUG PIN
NUMBER
+
Red
1
Ground
White
2
---
Black
3
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. 47.
CCN Bus
+ (RED)
TB1
12
PL
J2-1
GND (WHT)
TB1
14
J2-2
– (BLK)
TB1
16
J2-3
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
- 20_C to 60_C is required. Do not run communication
wire in the same conduit as or next to any AC voltage
wiring.
Fig. 47 - 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).
27
C08276
50HCQ
signal pins must be wired to the signal ground pins.
Wiring connections for CCN must be made at the 3-- pin
plug.
RTU--MP Control System
Refer to Table 8, RTU-- MP Controller Inputs and Outputs
for locations of all connections to the RTU-- MP board.
50HCQ
The RTU-- MP controller, see Fig. 48, 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.
The RTU-- MP control is factory-- mounted in the 50HCQ
unit’s main control box, to the left of the CTB. See
Fig. 49. 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.
Fig. 48 - RTU-- MP Multi-- Protocol Control Board
Fig. 49 - 50HCQ Control Box Component Locations
28
C07129
C10471
50HCQ
Fig. 50 - Typical RTU-- MP System Control Wiring Diagram
29
C10470
Table 8 – RTU-- MP Controller Inputs and Outputs
50HCQ
POINT NAME
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
Fire Shutdown
Enthalpy Switch
Humidistat Input Status
Space Relative Humidity
Outside Air Relative Humidity
BACnet OBJECT
NAME
TYPE OF I/O
INPUTS
sptsens
AI (10K Thermistor)
sat
AI (10K Thermistor)
oatsens
AI (10K Thermistor)
sptopot
AI (100K Potentiometer)
iaq
AI (4---20 ma)
oaq
AI (4---20 ma)
safety
DI (24 VAC)
compstat
DI (24 VAC)
firedown
DI (24 VAC)
enthalpy
DI (24 VAC)
humstat
DI (24 VAC)
CONFIGURABLE INPUTS*
sprh
AI (4---20 ma)
oarh
AI (4---20 ma)
Supply Fan Status
fanstat
DI (24 VAC)
Filter Status
filtstat
DI (24 VAC)
Remote Occupancy Input
Economizer Commanded Position
Supply Fan Relay State
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
remocc
OUTPUTS
econocmd
sf
comp_1
comp_2
heat_1
heat_2
aux_2
humizer
DI (24 VAC)
4---20ma
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)
CONNECTION PIN
NUMBERS
J20---1, 2
J2---1, 2
J2---3, 4
J20---3
J4---2, 3
J4---5, 6
J1---9
J1---2
J1---10
J2---6, 7
J5---7, 8
J4---2,3 or J4---5,6
J5---1,2 or J5---3,4 or
J5 5,6 or J5---7,8
J2---5
J1---4
J1---8
J1---7
J1---6
J1---5
J11---3
J11---7, 8
LEGEND
AI --- Analog Input
AO --- Analog Output
DI --- Discrete Input
DO --- Discrete Output
* These inputs (if installed) take the place of the default input on the specific channel according to schematic.
Parallel pins J5--- 1 = J2--- 6, J5--- 3 = J1--- 10, J5--- 5 = J1--- 2 are used for field --- installation.
The RTU-- MP controller requires the use of a Carrier
space sensor. A standard thermostat cannot be used with
the RTU-- MP system.
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.
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 1/2 - 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. 30.
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.
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.
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
30
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. 23. 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.
Connect T-- 59: The T-- 59 space sensor requires a
separate, isolated power supply of 24 VAC. See Fig. 52
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.
BRN (COM)
BLK (STO)
BLU (SPT)
OR
SET
SEN
OPB
COM- PWR+
SENSOR
WIRING
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:
S 33ZCT55SPT, space temperature sensor with override
button
24 VAC
S 33ZCT56SPT, space temperature sensor with override
button and setpoint adjustment
C07132
Fig. 53 - Space Temperature Sensor Typical Wiring
(33ZCT59SPT)
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.
Connect T-- 55: See Fig. 32 for typical T-- 55 internal
connections. Connect the T-- 55 SEN terminals to
RTU-- MP J20-- 1 and J20-- 2. See Fig. 51.
J20-1
SEN
J20-2
Fig. 51 - RTU-- MP T-- 55 Sensor Connections
C08460
Connect T-- 56: See Fig. 34 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. 52.
SEN
J20-2
Jumper
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. 37.)
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. 37. Connect the
enthalpy control power input terminals to economizer
actuator power leads RED (connect to 24V) and BLK
(connect to GND).
The outdoor enthalpy changeover setpoint is set at the
enthalpy controller.
Differential Enthalpy Control —
Return Air Enthalpy Sensor —
SET
SET
Economizer Controls
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.
J20-1
SEN
POWER
WIRING
NOTE: Must use a separate isolated transformer.
S 33ZCT59SPT, space temperature sensor with LCD
(liquid crystal display) screen, override button, and
setpoint adjustment
SEN
50HCQ
Space Temperature (SPT) Sensors —
J20-3
Fig. 52 - RTU-- MP T-- 56 Sensor Connections
C08461
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. 38.
31
To wire the return air enthalpy sensor, perform the
following:
1. Use a 2-- conductor, 18 or 20 AWG, twisted pair cable
to connect the return air enthalpy sensor to the enthalpy 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 enthalpy sensor and the (-- ) terminal on the enthalpy
controller.
50HCQ
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.
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. 39 for
typical CO2 sensor wiring schematic.
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. 41. 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.
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. 39. Connect the 4 to 20 mA
terminal to RTU-- MP J4-- 5. Connect the SIG COM
terminal to RTU-- MP J4-- 6.
OAQ Sensor/RH Sensor
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.
SEN
J4-5
COM
J4-6
24 VAC
Fig. 55 - RTU-- MP / Outdoor CO2 Sensor
(33ZCSENCO2) Connections
C08463
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. 50, 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.
To connect the sensor to the control, identify the positive
(4 to 20 mA) and ground (SIG COM) terminals on the
sensor. See Fig. 39. Connect the 4-- 20 mA terminal to
RTU-- MP J4-- 2 and connect the SIG COM terminal to
RTU-- MP J4-- 3. See Fig. 54.
IAQ Sensor
SEN
J4-2
COM
J4-3
24 VAC
Fig. 54 - RTU-- MP / Indoor CO2 Sensor
(33ZCSENCO2) Connections
C08462
Connecting Discrete Inputs —
Filter Status: The filter status accessory is a
field-- installed accessory. This accessory detects plugged
filters. When installing this accessory, the unit must be
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. 48 and Fig. 50 for wire terminations at J5.
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
be
configured
for
fan
status
by
setting
MENU→Config→Inputs→input 3, 5, 8, or 9 to Fan
Status and normally open (N/O) or normally closed (N/C).
32
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
configured for
remote occupancy
by setting
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. 48 and Table 8 for wire
terminations at J5.
Power Exhaust (output): Connect the accessory Power
Exhaust contactor coil(s) per Fig. 56.
Power Exhaust
PEC
J11-3
TAN
CTB
THERMOSTAT
C
GRA
C08464
Fig. 56 - RTU-- MP Power Exhaust Connections
Space Relative Humidity Sensor: The RH sensor is not
used with 50HCQ models at this time.
Communication Wiring -- Protocols
General —
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.
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. 57 for the switch setting
per protocol. The 3rd party connection to the RTU-- MP is
through plug J19.
NOTE: Power must be cycled after changing the SW1-- 3
switch settings.
Refer to the RTU-- MP 3rd Party Integration Guide for
more detailed information on protocols, 3rd party wiring,
and networking.
SW3 Protocol Selection
PROTOCOL
DS8
DS7
DS6
DS5
DS4
DS3
DS2
DS1
BACnet MS/TP
(Master)
Unused
OFF
OFF
OFF
ON
OFF
Select Baud
Select Baud
Modbus
(Slave)
Unused
OFF
OFF
ON
ON
OFF
Select Baud
Select Baud
N2
(Slave)
Unused
OFF
OFF
OFF
ON
ON
OFF
OFF
LonWorks
Unused
ON
ON
OFF
ON
OFF
OFF
OFF
NOTE:
DS = Dip Switch
BACnet MS/TP SW3 example shown
Baud Rate Selections
BAUD RATE
DS2
DS1
9600
OFF
OFF
19,200
ON
OFF
38,400
OFF
ON
76,800
ON
ON
C07166
Fig. 57 - RTU-- MP SW3 Dip Switch Settings
33
50HCQ
Input 8 or 9 is recommended for easy of installation. Refer
to Fig. 48 and Fig. 50 for wire terminations at J5.
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.
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.
50HCQ
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. 58. 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.
Fig. 58 - BACview6 Handheld Connections
34
C07170
Table 9 – LEDs
The LEDs on the RTU-- MP show the status of certain functions
If this LED is on...
Status is...
Power
The RTU MP has power
Rx
The RTU MP is receiving data from the network segment
Tx
The RTU MP is transmitting data over the network segment
DO#
The digital output is active
If Run LED shows...
And Error LED shows...
Status is...
2 flashes per second
Off
Normal
2 flashes per second
2 flashes,
alternating with Run LED
Five minute auto---restart delay after system error
2 flashes per second
3 flashes,
then off
Control module has just been formatted
2 flashes per second
4 flashes,
then pause
Two or more devices on this network have the
same ARC156 network address
2 flashes per second
On
Exec halted after frequent system errors or
control programs halted
5 flashes per second
On
Exec start---up aborted, Boot is running
5 flashes per second
Off
Firmware transfer in progress, Boot is running
7 flashes per second
7 flashes per second, alternating with
Run LED
Ten second recovery period after brownout
14 flashes per second
14 flashes per second,
alternating with Run LED
Brownout
On
Failure. Try the following solutions:
S
Turn the RTU ---MP off, then on.
S
Format the RTU ---MP.
S
Download memory to the RTU ---MP.
S
Replace the RTU ---MP.
On
NOTE: Refer to Form 48-- 50H-- T-- 2T for complete
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.
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.
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 37 for details.
System —
The smoke detector system consists of a four-- wire
controller and one or two sensors. Its primary function is
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.
Controller —
The controller (see Fig. 59) 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).
Sensor —
The sensor (see Fig. 60) 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).
35
50HCQ
The Run and Error LEDs indicate control module and network status
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
Terminal block cover
Controller housing
and electronics
Cover gasket
(ordering option)
Controller cover
Conduit couplings
(supplied by installer)
Fastener
(2X)
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.
50HCQ
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
Test/reset
switch
Supply Air —
Fig. 59 - Controller Assembly
C08208
The Supply Air smoke detector sensor is located to the left
of the unit’s indoor (supply) fan. See Fig. 61. 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.
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. 61 - Typical Supply Air Smoke Detector Sensor
Location
Coupling
Detail A
Return Air without Economizer —
Magnetic
test/reset
switch
Alarm
Trouble
Power
Dirty
Fig. 60 - Smoke Detector Sensor
C08209
The sampling tube is located 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
36
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. 64. Save the screws.
Return Air Detector module
(shipping position shown)*
Controller
Screws
Controller module
Sampling Tube
Return Air Detector Sampling Tube
C10331
*RA detector must be moved from shipping position to operating position by installer
Fig. 64 - Return Air Detector Shipping Position
C07307
Fig. 62 - 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 outwards and the sampling tube connection is on the bottom. See Fig. 65.
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. 63. 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. 65 - Return Air Sensor Operating Position
Return Air
Sampling Tube
C10330
Fig. 63 - Return Air Sampling Tube Location
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 exhaust tube is on the top. See Fig. 65.
5. Connect the flexible tube on the sampling inlet to the
sampling tube on the basepan
Additional Application Data —
Refer to Catalog No. HKRNKA-- 1XA for discussions on
additional control features of these smoke detectors
including multiple unit coordination.
37
50HCQ
Flexible
Exhaust
Tubes
IFM TYPE
ELEC. HTR
MED
MED
HIGH MED STD
575---3---60
HIGH
460---3---60
STD
50HCQA07
HIGH
50HCQ
208/230---3---60
STD
UNIT
NO M. V ---Ph---HZ
Table 10 – Unit Wire/Fuse or HACR Breaker Sizing Data
P.E.
NO C.O. or UNPWR C.O.
NO P.E.
CRHEATER***
Nom
(kW)
FLA
FLA
MCA
FUSE or
HACR
BRKR
w/ P.E. (pwrd fr/unit)
DISC. SIZE
FLA
LRA
MCA
FUSE or
HACR
BRKR
DISC. SIZE
FLA
LRA
NONE
---
---
32.0
50
31
148
35.8
50
36
152
264A00
4.9/6.5
13.6/15.6
49.0/51.5
60/60
47/49
162/164
52.8/55.3
60/60
51/54
166/168
117A00
7.8/10.4
21.7/25.0
59.1/63.2
60/70
56/60
170/173
62.9/67.0
70/70
61/64
174/177
110A00
12.0/16.0
33.4/38.5
73.7/80.1
80/90
70/76
181/187
77.5/83.9
80/90
74/80
185/191
117A00,117A00
15.8/21.0
43.8/50.5
86.7/95.1
90/100
82/89
236/249
90.5/98.9
100/100
86/94
240/253
110A00,117A00
19.9/26.5
55.2/63.8
101.0/111.7
110/125
95/105
258/276
104.8/115.5
110/125
99/109
262/280
NONE
---
---
34.3
50
34
185
38.1
50
38
189
264A00
4.9/6.5
13.6/15.6
51.3/53.8
60/60
50/52
199/201
55.1/57.6
60/60
54/56
203/205
117A00
7.8/10.4
21.7/25.0
61.4/65.5
70/70
59/63
207/210
65.2/69.3
70/80
63/67
211/214
110A00
12.0/16.0
33.4/38.5
76.0/82.4
80/90
72/78
218/224
79.8/86.2
80/90
77/83
222/228
117A00,117A00
15.8/21.0
43.8/50.5
89.0/97.4
90/100
84/92
273/286
92.8/101.2
100/110
89/96
277/290
110A00,117A00
19.9/26.5
55.2/63.8
103.3/114.0
110/125
97/107
295/313
107.1/117.8
110/125
102/112
299/317
NONE
---
---
41.8
60
43
211
45.6
60
47
215
264A00
4.9/6.5
13.6/15.6
58.8/61.3
70/70
58/60
225/227
62.6/65.1
70/80
63/65
229/231
117A00
7.8/10.4
21.7/25.0
68.9/73.0
80/80
68/71
233/236
72.7/76.8
80/80
72/76
237/240
110A00
12.0/16.0
33.4/38.5
83.5/89.9
90/90
81/87
244/250
87.3/93.7
90/100
85/91
248/254
117A00,117A00
15.8/21.0
43.8/50.5
96.5/104.9
100/110
93/101
299/312
100.3/108.7
110/110
97/105
303/316
110A00,117A00
19.9/26.5
55.2/63.8
110.8/121.5
125/125
106/116
321/339
114.6/125.3
125/150
110/120
325/343
NONE
---
---
16.3
25
16
75
18.1
25
18
77
265A00
6.0
7.2
25.3
30
24
82
27.1
30
26
84
266A00
11.5
13.8
33.6
35
32
89
35.4
40
34
91
267A00
14.0
16.8
37.3
40
35
92
39.1
40
37
94
268A00
23.0
27.7
51.0
60
48
103
52.8
60
50
105
269A00
25.5
30.7
54.7
60
51
106
56.5
60
53
108
NONE
---
---
17.1
25
17
94
18.9
25
19
96
3.8
3.8
3.8
1.8
265A00
6.0
7.2
26.1
30
25
101
27.9
30
27
103
266A00
11.5
13.8
34.4
40
33
108
36.2
40
35
110
267A00
14.0
16.8
38.1
40
36
111
39.9
45
38
113
268A00
23.0
27.7
51.8
60
49
122
53.6
60
51
124
269A00
25.5
30.7
55.5
60
52
125
57.3
60
54
127
NONE
---
---
21.1
30
22
107
22.9
30
24
109
265A00
6.0
7.2
30.1
35
30
114
31.9
35
32
116
266A00
11.5
13.8
38.4
40
37
121
40.2
45
39
123
267A00
14.0
16.8
42.1
45
41
124
43.9
45
43
126
268A00
23.0
27.7
55.8
60
53
135
57.6
60
55
137
269A00
25.5
30.7
59.5
60
57
138
61.3
70
59
140
NONE
---
---
3.8
12.9
20
13
61
16.7
20
17
65
NONE
---
---
3.8
13.3
20
13
76
17.1
20
17
80
NONE
---
---
3.8
16.1
20
16
90
19.9
25
21
94
1.8
1.8
NOTE: See page 44 for table legend and notes.
38
MED
HIGH
208/230---3---60
HIGH MED STD
HIGH
MED
STD
50HCQA07
460---3---60
575---3---60
P.E.
w/ PWRD C.O.
NO P.E.
CRHEATER***
Nom
(kW)
FLA
FLA
MCA
FUSE or
HACR
BRKR
w/ P.E. (pwrd fr/unit)
DISC. SIZE
FLA
LRA
MCA
FUSE or
HACR
BRKR
DISC. SIZE
FLA
LRA
NONE
---
---
36.8
50
37
153
40.6
50
41
157
264A00
4.9/6.5
13.6/15.6
53.8/56.3
60/60
52/55
167/169
57.6/60.1
60/70
57/59
171/173
117A00
7.8/10.4
21.7/25.0
63.9/68.0
70/80
62/66
175/178
67.7/71.8
80/80
66/70
179/182
110A00
12.0/16.0
33.4/38.5
78.5/84.9
80/90
75/81
186/192
82.3/88.7
90/90
80/85
190/196
117A00,117A00
15.8/21.0
43.8/50.5
91.5/99.9
100/100
87/95
241/254
95.3/103.7
100/110
92/99
245/258
110A00,117A00
19.9/26.5
55.2/63.8
105.8/116.5
110/125
100/110
263/281
109.6/120.3
110/125
105/115
267/285
NONE
---
---
39.1
50
39
190
42.9
60
44
194
264A00
4.9/6.5
13.6/15.6
56.1/58.6
60/60
55/57
204/206
59.9/62.4
70/70
59/62
208/210
117A00
7.8/10.4
21.7/25.0
66.2/70.3
70/80
64/68
212/215
70.0/74.1
80/80
69/73
216/219
110A00
12.0/16.0
33.4/38.5
80.8/87.2
90/90
78/84
223/229
84.6/91.0
90/100
82/88
227/233
117A00,117A00
15.8/21.0
43.8/50.5
93.8/102.2
100/110
90/98
278/291
97.6/106.0
100/110
94/102
282/295
110A00,117A00
19.9/26.5
55.2/63.8
108.1/118.8
110/125
103/113
300/318
111.9/122.6
125/125
107/117
304/322
NONE
---
---
46.6
60
48
216
50.4
60
52
220
264A00
4.9/6.5
13.6/15.6
63.6/66.1
70/80
64/66
230/232
67.4/69.9
80/80
68/70
234/236
117A00
7.8/10.4
21.7/25.0
73.7/77.8
80/80
73/77
238/241
77.5/81.6
80/90
77/81
242/245
110A00
12.0/16.0
33.4/38.5
88.3/94.7
90/100
86/92
249/255
92.1/98.5
100/100
91/97
253/259
117A00,117A00
15.8/21.0
43.8/50.5
101.3/109.7
110/110
98/106
304/317
105.1/113.5
110/125
103/111
308/321
110A00,117A00
19.9/26.5
55.2/63.8
115.6/126.3
125/150
112/121
326/344
119.4/130.1
125/150
116/126
330/348
NONE
---
---
18.5
25
19
77
20.3
30
21
79
265A00
6.0
7.2
27.5
30
27
84
29.3
30
29
86
266A00
11.5
13.8
35.8
40
34
91
37.6
40
36
93
267A00
14.0
16.8
39.5
45
38
94
41.3
45
40
96
268A00
23.0
27.7
53.2
60
50
105
55.0
60
52
107
269A00
25.5
30.7
56.9
60
54
108
58.7
60
56
110
NONE
---
---
19.3
25
19
96
21.1
30
22
98
3.8
3.8
3.8
1.8
265A00
6.0
7.2
28.3
30
28
103
30.1
35
30
105
266A00
11.5
13.8
36.6
40
35
110
38.4
40
37
112
267A00
14.0
16.8
40.3
45
39
113
42.1
45
41
115
268A00
23.0
27.7
54.0
60
51
124
55.8
60
53
126
269A00
25.5
30.7
57.7
60
55
127
59.5
60
57
129
NONE
---
---
23.3
30
24
109
25.1
30
26
111
265A00
6.0
7.2
32.3
40
32
116
34.1
40
34
118
266A00
11.5
13.8
40.6
45
40
123
42.4
45
42
125
267A00
14.0
16.8
44.3
45
43
126
46.1
50
45
128
268A00
23.0
27.7
58.0
60
56
137
59.8
60
58
139
269A00
25.5
30.7
61.7
70
59
140
63.5
70
61
142
NONE
---
---
3.8
14.6
20
15
63
18.4
25
19
67
NONE
---
---
3.8
15.0
20
15
78
18.8
25
19
82
NONE
---
---
3.8
17.8
25
18
92
21.6
25
23
96
1.8
1.8
NOTE: See page 44 for table legend and notes.
39
50HCQ
IFM TYPE
ELEC. HTR
STD
UNIT
NO M. V ---Ph---HZ
Table 10 — Unit Wire/Fuse or HACR Breaker Sizing Data (cont)
IFM TYPE
ELEC. HTR
MED
MED
P.E.
NO C.O. or UNPWR C.O.
NO P.E.
CRHEATER***
Nom
(kW)
FLA
FLA
MCA
FUSE or
HACR
BRKR
w/ P.E. (pwrd fr/unit)
DISC. SIZE
FLA
LRA
MCA
FUSE or
HACR
BRKR
DISC. SIZE
FLA
LRA
NONE
---
---
37.7
50
40
191
41.5
50
44
195
117A00
7.8/10.4
21.7/25.0
64.8/68.9
70/70
65/68
213/216
68.6/72.7
70/80
69/73
217/220
110A00
12.0/16.0
33.4/38.5
111A00
18.6/24.8
51.7/59.7
112A00
24.0/32.0
112A00,117A00
79.4/85.8
80/90
78/84
224/230
83.2/89.6
90/90
82/88
228/234
102.3/112.3
110/125
99/108
243/251
106.1/116.1
110/125
103/113
247/255
66.7/77.0
121.1/133.9
125/150
116/128
258/268
124.9/137.7
125/150
121/132
262/272
31.8/42.4
88.4/102.0
148.2/165.2
150/175
141/157
368/395
152.0/169.0
175/175
146/161
372/399
NONE
---
---
37.7
50
40
202
41.5
50
44
206
117A00
7.8/10.4
21.7/25.0
64.8/68.9
70/70
65/68
224/227
68.6/72.7
70/80
69/73
228/231
110A00
12.0/16.0
33.4/38.5
111A00
18.6/24.8
51.7/59.7
112A00
24.0/32.0
112A00,117A00
3.8
79.4/85.8
80/90
78/84
235/241
83.2/89.6
90/90
82/88
239/245
102.3/112.3
110/125
99/108
254/262
106.1/116.1
110/125
103/113
258/266
66.7/77.0
121.1/133.9
125/150
116/128
269/279
124.9/137.7
125/150
121/132
273/283
31.8/42.4
88.4/102.0
148.2/165.2
150/175
141/157
379/406
152.0/169.0
175/175
146/161
383/410
NONE
---
---
42.5
50
45
245
46.3
50
49
249
117A00
7.8/10.4
21.7/25.0
69.6/73.7
70/80
70/74
267/270
73.4/77.5
80/80
74/78
271/274
110A00
12.0/16.0
33.4/38.5
111A00
18.6/24.8
51.7/59.7
112A00
24.0/32.0
112A00,117A00
NONE
3.8
90/100
83/89
278/284
88.0/94.4
90/100
88/94
282/288
110/125
105/114
297/305
110.9/120.9
125/125
109/118
301/309
66.7/77.0
125.9/138.7
150/150
122/134
312/322
129.7/142.5
150/150
126/138
316/326
31.8/42.4
88.4/102.0
153.0/170.0
175/175
147/162
422/449
156.8/173.8
175/175
151/167
426/453
---
---
17.9
20
19
95
19.7
25
21
97
116A00
13.9
16.7
38.8
40
38
112
40.6
45
40
114
113A00
16.5
19.8
42.7
45
42
115
44.5
45
44
117
114A00
27.8
33.4
59.7
60
57
128
61.5
70
59
130
115A00
33.0
39.7
67.6
70
65
135
69.4
70
67
137
114A00,116A00
41.7
50.2
80.7
90
77
195
82.5
90
79
197
NONE
---
---
17.9
20
19
101
19.7
25
21
103
116A00
13.9
16.7
38.8
40
38
118
40.6
45
40
120
113A00
16.5
19.8
42.7
45
42
121
44.5
45
44
123
114A00
27.8
33.4
59.7
60
57
134
61.5
70
59
136
115A00
33.0
39.7
67.6
70
65
141
69.4
70
67
143
114A00,116A00
41.7
50.2
80.7
90
77
201
82.5
90
79
203
NONE
---
---
19.7
25
21
123
21.5
25
23
125
116A00
13.9
16.7
40.6
45
40
140
42.4
45
42
142
113A00
16.5
19.8
44.5
45
44
143
46.3
50
46
145
114A00
27.8
33.4
61.5
70
59
156
63.3
70
61
158
115A00
33.0
39.7
69.4
70
67
163
71.2
80
69
165
114A00,116A00
41.7
50.2
82.5
90
79
223
84.3
90
81
225
NONE
---
---
13.5
15
14
77
17.3
20
19
81
118A00
17.0
20.4
39.0
40
38
97
42.8
45
42
101
119A00
34.0
40.9
64.6
70
61
118
68.4
70
66
122
NONE
---
---
13.1
15
14
81
16.9
20
18
85
17.0
20.4
38.6
40
37
101
42.4
45
42
105
119A00
34.0
40.9
64.2
70
61
122
68.0
70
65
126
13.9
20
15
92
17.7
20
19
96
39.4
40
38
112
43.2
45
43
116
65.0
70
62
133
68.8
70
66
137
MED
84.2/90.6
107.1/117.1
118A00
HIGH
575---3---60
STD
HIGH
460---3---60
50HCQA08
STD
HIGH
50HCQ
208/230---3---60
STD
UNIT
NO M. V ---Ph---HZ
Table 10 — Unit Wire/Fuse or HACR Breaker Sizing Data (cont)
NONE
---
---
118A00
17.0
20.4
119A00
34.0
40.9
3.8
1.8
1.8
1.8
3.8
3.8
3.8
NOTE: See page 44 for table legend and notes.
40
MED
w/ PWRD C.O.
NO P.E.
CRHEATER***
Nom
(kW)
FLA
FLA
MCA
FUSE or
HACR
BRKR
w/ P.E. (pwrd fr/unit)
DISC. SIZE
FLA
LRA
MCA
FUSE or
HACR
BRKR
DISC. SIZE
FLA
LRA
NONE
---
---
42.5
50
45
196
46.3
50
49
200
117A00
7.8/10.4
21.7/25.0
69.6/73.7
70/80
70/74
218/221
73.4/77.5
80/80
74/78
222/225
110A00
12.0/16.0
33.4/38.5
111A00
18.6/24.8
51.7/59.7
112A00
24.0/32.0
112A00,117A00
84.2/90.6
90/100
83/89
229/235
88.0/94.4
90/100
88/94
233/239
107.1/117.1
110/125
105/114
248/256
110.9/120.9
125/125
109/118
252/260
66.7/77.0
125.9/138.7
150/150
122/134
263/273
129.7/142.5
150/150
126/138
267/277
31.8/42.4
88.4/102.0
153.0/170.0
175/175
147/162
373/400
156.8/173.8
175/175
151/167
377/404
NONE
---
---
42.5
50
45
207
46.3
50
49
211
117A00
7.8/10.4
21.7/25.0
69.6/73.7
70/80
70/74
229/232
73.4/77.5
80/80
74/78
233/236
110A00
12.0/16.0
33.4/38.5
111A00
18.6/24.8
51.7/59.7
112A00
24.0/32.0
112A00,117A00
3.8
84.2/90.6
90/100
83/89
240/246
88.0/94.4
90/100
88/94
244/250
107.1/117.1
110/125
105/114
259/267
110.9/120.9
125/125
109/118
263/271
66.7/77.0
125.9/138.7
150/150
122/134
274/284
129.7/142.5
150/150
126/138
278/288
31.8/42.4
88.4/102.0
153.0/170.0
175/175
147/162
384/411
156.8/173.8
175/175
151/167
388/415
NONE
---
---
47.3
60
51
250
51.1
60
55
254
117A00
7.8/10.4
21.7/25.0
74.4/78.5
80/80
76/79
272/275
78.2/82.3
80/90
80/84
276/279
110A00
12.0/16.0
33.4/38.5
111A00
18.6/24.8
51.7/59.7
112A00
24.0/32.0
112A00,117A00
NONE
3.8
90/100
89/95
283/289
92.8/99.2
100/100
93/99
287/293
125/125
110/119
302/310
115.7/125.7
125/150
114/124
306/314
66.7/77.0
130.7/143.5
150/150
127/139
317/327
134.5/147.3
150/150
132/144
321/331
31.8/42.4
88.4/102.0
157.8/174.8
175/175
152/168
427/454
161.6/178.6
175/200
157/172
431/458
---
---
20.1
25
21
97
21.9
25
23
99
116A00
13.9
16.7
41.0
45
41
114
42.8
45
43
116
113A00
16.5
19.8
44.9
45
44
117
46.7
50
46
119
114A00
27.8
33.4
61.9
70
60
130
63.7
70
62
132
115A00
33.0
39.7
69.8
70
67
137
71.6
80
69
139
114A00,116A00
41.7
50.2
82.9
90
79
197
84.7
90
81
199
NONE
---
---
20.1
25
21
103
21.9
25
23
105
116A00
13.9
16.7
41.0
45
41
120
42.8
45
43
122
113A00
16.5
19.8
44.9
45
44
123
46.7
50
46
125
114A00
27.8
33.4
61.9
70
60
136
63.7
70
62
138
115A00
33.0
39.7
69.8
70
67
143
71.6
80
69
145
114A00,116A00
41.7
50.2
82.9
90
79
203
84.7
90
81
205
NONE
---
---
21.9
25
23
125
23.7
30
26
127
116A00
13.9
16.7
42.8
45
43
142
44.6
45
45
144
113A00
16.5
19.8
46.7
50
46
145
48.5
50
48
147
114A00
27.8
33.4
63.7
70
62
158
65.5
70
64
160
115A00
33.0
39.7
71.6
80
69
165
73.4
80
71
167
114A00,116A00
41.7
50.2
84.7
90
81
225
86.5
90
83
227
NONE
---
---
15.2
20
16
79
19.0
25
21
83
118A00
17.0
20.4
40.7
45
40
99
44.5
45
44
103
119A00
34.0
40.9
66.3
70
63
120
70.1
80
68
124
NONE
---
---
14.8
20
16
83
18.6
20
20
87
17.0
20.4
40.3
45
39
103
44.1
45
44
107
119A00
34.0
40.9
65.9
70
63
124
69.7
70
67
128
15.6
20
17
94
19.4
25
21
98
41.1
45
40
114
44.9
45
45
118
66.7
70
64
135
70.5
80
68
139
MED
89.0/95.4
111.9/121.9
118A00
HIGH
STD
HIGH
MED
STD
HIGH
208/230---3---60
50HCQA08
460---3---60
575---3---60
P.E.
NONE
---
---
118A00
17.0
20.4
119A00
34.0
40.9
3.8
1.8
1.8
1.8
3.8
3.8
3.8
NOTE: See page 44 for table legend and notes.
41
50HCQ
IFM TYPE
ELEC. HTR
STD
UNIT
NO M. V ---Ph---HZ
Table 10 — Unit Wire/Fuse or HACR Breaker Sizing Data (cont)
IFM TYPE
ELEC. HTR
MED
MED
P.E.
NO C.O. or UNPWR C.O.
NO P.E.
CRHEATER***
Nom
(kW)
FLA
FLA
MCA
FUSE or
HACR
BRKR
w/ P.E. (pwrd fr/unit)
DISC. SIZE
FLA
LRA
MCA
FUSE or
HACR
BRKR
DISC. SIZE
FLA
LRA
NONE
---
---
41.9
50
44
201
45.7
60
48
205
117A00
7.8/10.4
21.7/25.0
69.0/73.2
70/80
69/72
223/226
72.8/77.0
80/80
73/77
227/230
110A00
12.0/16.0
33.4/38.5
111A00
18.6/24.8
51.7/59.7
112A00
24.0/32.0
112A00,117A00
83.7/90.0
90/100
82/88
234/240
87.5/93.8
90/100
86/92
238/244
106.5/116.5
110/125
103/112
253/261
110.3/120.3
125/125
107/117
257/265
66.7/77.0
125.3/138.2
150/150
120/132
268/278
129.1/142.0
150/150
125/137
272/282
31.8/42.4
88.4/102.0
152.4/169.4
175/175
145/161
378/405
156.2/173.2
175/175
150/165
382/409
NONE
---
---
44.2
60
46
238
48.0
60
51
242
117A00
7.8/10.4
21.7/25.0
71.3/75.5
80/80
71/75
260/263
75.1/79.3
80/80
76/79
264/267
110A00
12.0/16.0
33.4/38.5
111A00
18.6/24.8
51.7/59.7
112A00
24.0/32.0
112A00,117A00
3.8
86.0/92.3
90/100
85/91
271/277
89.8/96.1
90/100
89/95
275/281
108.8/118.8
110/125
106/115
290/298
112.6/122.6
125/125
110/119
294/302
66.7/77.0
127.6/140.5
150/150
123/135
305/315
131.4/144.3
150/150
127/139
309/319
31.8/42.4
88.4/102.0
154.7/171.7
175/175
148/164
415/442
158.5/175.5
175/200
152/168
419/446
NONE
---
---
44.2
60
46
238
48.0
60
51
242
117A00
7.8/10.4
21.7/25.0
71.3/75.5
80/80
71/75
260/263
75.1/79.3
80/80
76/79
264/267
110A00
12.0/16.0
33.4/38.5
111A00
18.6/24.8
51.7/59.7
112A00
24.0/32.0
112A00,117A00
NONE
3.8
90/100
85/91
271/277
89.8/96.1
90/100
89/95
275/281
110/125
106/115
290/298
112.6/122.6
125/125
110/119
294/302
66.7/77.0
127.6/140.5
150/150
123/135
305/315
131.4/144.3
150/150
127/139
309/319
31.8/42.4
88.4/102.0
154.7/171.7
175/175
148/164
415/442
158.5/175.5
175/200
152/168
419/446
---
---
19.2
25
20
100
21.0
25
22
102
116A00
13.9
16.7
40.0
45
39
117
41.8
45
41
119
113A00
16.5
19.8
43.9
45
43
120
45.7
50
45
122
114A00
27.8
33.4
60.9
70
58
133
62.7
70
60
135
115A00
33.0
39.7
68.8
70
66
140
70.6
80
68
142
114A00,116A00
41.7
50.2
81.9
90
78
200
83.7
90
80
202
NONE
---
---
20.0
25
21
119
21.8
25
23
121
116A00
13.9
16.7
40.8
45
40
136
42.6
45
42
138
113A00
16.5
19.8
44.7
45
44
139
46.5
50
46
141
114A00
27.8
33.4
61.7
70
59
152
63.5
70
61
154
115A00
33.0
39.7
69.6
70
67
159
71.4
80
69
161
114A00,116A00
41.7
50.2
82.7
90
79
219
84.5
90
81
221
NONE
---
---
20.0
25
21
119
21.8
25
23
121
116A00
13.9
16.7
40.8
45
40
136
42.6
45
42
138
113A00
16.5
19.8
44.7
45
44
139
46.5
50
46
141
114A00
27.8
33.4
61.7
70
59
152
63.5
70
61
154
115A00
33.0
39.7
69.6
70
67
159
71.4
80
69
161
114A00,116A00
41.7
50.2
82.7
90
79
219
84.5
90
81
221
NONE
---
---
15.4
20
16
81
19.2
25
20
85
118A00
17.0
20.4
40.9
45
40
101
44.7
45
44
105
119A00
34.0
40.9
66.5
70
63
122
70.3
80
68
126
NONE
---
---
15.8
20
17
96
19.6
25
21
100
17.0
20.4
41.3
45
40
116
45.1
50
44
120
119A00
34.0
40.9
66.9
70
64
137
70.7
80
68
141
15.8
20
17
96
19.6
25
21
100
41.3
45
40
116
45.1
50
44
120
66.9
70
64
137
70.7
80
68
141
MED
86.0/92.3
108.8/118.8
118A00
HIGH
575---3---60
STD
HIGH
460---3---60
50HCQA09
STD
HIGH
50HCQ
208/230---3---60
STD
UNIT
NO M. V ---Ph---HZ
Table 10 — Unit Wire/Fuse or HACR Breaker Sizing Data (cont)
NONE
---
---
118A00
17.0
20.4
119A00
34.0
40.9
3.8
1.8
1.8
1.8
3.8
3.8
3.8
NOTE: See page 44 for table legend and notes.
42
MED
w/ PWRD C.O.
NO P.E.
CRHEATER***
Nom
(kW)
FLA
FLA
MCA
FUSE or
HACR
BRKR
w/ P.E. (pwrd fr/unit)
DISC. SIZE
FLA
LRA
MCA
FUSE or
HACR
BRKR
DISC. SIZE
FLA
LRA
NONE
---
---
46.7
60
49
206
50.5
60
53
210
117A00
7.8/10.4
21.7/25.0
73.8/78.0
80/80
74/78
228/231
77.6/81.8
80/90
78/82
232/235
110A00
12.0/16.0
33.4/38.5
111A00
18.6/24.8
51.7/59.7
112A00
24.0/32.0
112A00,117A00
88.5/94.8
90/100
88/93
239/245
92.3/98.6
100/100
92/98
243/249
111.3/121.3
125/125
109/118
258/266
115.1/125.1
125/150
113/122
262/270
66.7/77.0
130.1/143.0
150/150
126/138
273/283
133.9/146.8
150/150
130/142
277/287
31.8/42.4
88.4/102.0
157.2/174.2
175/175
151/166
383/410
161.0/178.0
175/200
155/171
387/414
NONE
---
---
49.0
60
52
243
52.8
60
56
247
117A00
7.8/10.4
21.7/25.0
76.1/80.3
80/90
77/81
265/268
79.9/84.1
80/90
81/85
269/272
110A00
12.0/16.0
33.4/38.5
111A00
18.6/24.8
51.7/59.7
112A00
24.0/32.0
112A00,117A00
3.8
90.8/97.1
100/100
90/96
276/282
94.6/100.9
100/110
95/100
280/286
113.6/123.6
125/125
111/120
295/303
117.4/127.4
125/150
116/125
299/307
66.7/77.0
132.4/145.3
150/150
128/140
310/320
136.2/149.1
150/150
133/145
314/324
31.8/42.4
88.4/102.0
159.5/176.5
175/200
153/169
420/447
163.3/180.3
175/200
158/173
424/451
NONE
---
---
49.0
60
52
243
52.8
60
56
247
117A00
7.8/10.4
21.7/25.0
76.1/80.3
80/90
77/81
265/268
79.9/84.1
80/90
81/85
269/272
110A00
12.0/16.0
33.4/38.5
111A00
18.6/24.8
51.7/59.7
112A00
24.0/32.0
112A00,117A00
NONE
3.8
100/100
90/96
276/282
94.6/100.9
100/110
95/100
280/286
125/125
111/120
295/303
117.4/127.4
125/150
116/125
299/307
66.7/77.0
132.4/145.3
150/150
128/140
310/320
136.2/149.1
150/150
133/145
314/324
31.8/42.4
88.4/102.0
159.5/176.5
175/200
153/169
420/447
163.3/180.3
175/200
158/173
424/451
---
---
21.4
25
23
102
23.2
30
25
104
116A00
13.9
16.7
42.2
45
42
119
44.0
45
44
121
113A00
16.5
19.8
46.1
50
45
122
47.9
50
47
124
114A00
27.8
33.4
63.1
70
61
135
64.9
70
63
137
115A00
33.0
39.7
71.0
80
68
142
72.8
80
70
144
114A00,116A00
41.7
50.2
84.1
90
80
202
85.9
90
82
204
NONE
---
---
22.2
25
23
121
24.0
30
26
123
116A00
13.9
16.7
43.0
45
43
138
44.8
45
45
140
113A00
16.5
19.8
46.9
50
46
141
48.7
50
48
143
114A00
27.8
33.4
63.9
70
62
154
65.7
70
64
156
115A00
33.0
39.7
71.8
80
69
161
73.6
80
71
163
114A00,116A00
41.7
50.2
84.9
90
81
221
86.7
90
83
223
NONE
---
---
22.2
25
23
121
24.0
30
26
123
116A00
13.9
16.7
43.0
45
43
138
44.8
45
45
140
113A00
16.5
19.8
46.9
50
46
141
48.7
50
48
143
114A00
27.8
33.4
63.9
70
62
154
65.7
70
64
156
115A00
33.0
39.7
71.8
80
69
161
73.6
80
71
163
114A00,116A00
41.7
50.2
84.9
90
81
221
86.7
90
83
223
NONE
---
---
17.1
20
18
83
20.9
25
22
87
118A00
17.0
20.4
42.6
45
42
103
46.4
50
46
107
119A00
34.0
40.9
68.2
70
65
124
72.0
80
69
128
NONE
---
---
17.5
20
19
98
21.3
25
23
102
17.0
20.4
43.0
45
42
118
46.8
50
46
122
119A00
34.0
40.9
68.6
70
66
139
72.4
80
70
143
17.5
20
19
98
21.3
25
23
102
43.0
45
42
118
46.8
50
46
122
68.6
70
66
139
72.4
80
70
143
MED
90.8/97.1
113.6/123.6
118A00
HIGH
STD
HIGH
MED
STD
HIGH
208/230---3---60
50HCQA09
208/230---3---60
208/230---3---60
P.E.
NONE
---
---
118A00
17.0
20.4
119A00
34.0
40.9
3.8
1.8
1.8
1.8
3.8
3.8
3.8
NOTE: See page 44 for table legend and notes.
43
50HCQ
IFM TYPE
ELEC. HTR
STD
UNIT
NO M. V ---Ph---HZ
Table 10 — Unit Wire/Fuse or HACR Breaker Sizing Data (cont)
Legend and Notes for Table 10
50HCQ
LEGEND:
BRKR
CO
DD
--- Circuit breaker
--- Convenient outlet
--- Direct drive
indoor fan motor
--- Disconnect
--- Full load amps
--- Indoor fan motor
--- Locked rotor amps
--- Minimum circuit amps
--- Power exhaust
--- Powered convenient outlet
--- Unpowered convenient outlet
DISC
FLA
IFM
LRA
MCA
PE
PWRD CO
UNPWR CO
NOTES:
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.
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 determine the percentage of voltage imbalance.
% Voltage Imbalance
= 100 x
max voltage deviation from average voltage
average voltage
Example: Supply voltage is 230-3-60
AB = 224 v
BC = 231 v
AC = 226 v
Average Voltage =
=
(224 + 231 + 226)
3
=
681
3
227
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.
Determine percent of voltage imbalance.
% Voltage Imbalance
= 100 x
4
227
= 1.76%
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.
Economizer
2 Position Damper
Unit Without Economizer or
2 Position Damper
Fig. 66 - EconoMi$ert IV Wiring
C08631
Step 11 — Adjust Factory--Installed Options
EconoMi$er IV Occupancy Switch —
Smoke Detectors —
Refer to Fig. 66 for general EconoMi$er IV wiring.
External occupancy control is managed through a
connection on the Central Terminal Board.
Smoke detector(s) will be connected at the Central
Terminal Board (CTB), at terminals marked “Smoke
Shutdown”. Remove jumper JMP 3 when ready to
energize unit.
If external occupancy control is desired, connect a time
clock or remotely controlled switch (closed for Occupied,
open for Unoccupied sequence) at terminals marked
OCCUPANCY on CTB. Remove or cut jumper JMP 2 to
complete the installation.
44
Pre--Start and Start--Up
Available accessories include:
This completes the mechanical installation of the unit.
Refer to the unit’s Service Manual for detailed Pre-- Start
and Start-- up instructions.
Roof Curb
Thru-- base connection kit (must be installed before unit
is set on curb)
Manual outside air damper
Two-- Position motorized outside air damper
EconoMi$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
50HCQ
Step 12 — Install Accessories
Refer to separate installation instructions for information
on installing these accessories.
45
46
50HCQ
47
50HCQ
50HCQ
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.
48
Catalog No: 50HCQ---02SI
Replaces: NEW