Carrier 50HJQ014 Dimensions and installation guide

Installation, Start-Up
and Service Instructions
CONTENTS Page
SAFETY CONSIDERATIONS ...................1
INSTALLATION .............................1-11
Step 1 — Provide Unit Support ............... 1
• ROOF CURB
• ALTERNATE UNIT SUPPORT
Step 2 — Rig and Place Unit ..................1
• POSITIONING
• ROOF MOUNT
Step 3 — Field Fabricate Ductwork ............1
Step 4 — Make Unit Duct Connections ........3
Step5—TrapCondensate Drain .............3
Step 6 — Make Electrical Connections ........3
• FIELD POWER SUPPLY
• FIELD CONTROL WIRING
Step 7 — Make Outdoor-Air Inlet
Adjustments ................................8
• MANUAL OUTDOOR-AIR DAMPER
• OPTIONAL FACTORY-INSTALLED
ECONOMIZER
Step 8 — Install Outdoor-Air Hood ............8
Step 9 — Defrost Cycle ......................10
START-UP ................................12-16
SERVICE ..................................17-21
TROUBLESHOOTING ......................21-27
START-UP CHECKLIST .....................CL-1
SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment
can be hazardous due to system pressure and electrical com-
ponents. Only trained and qualified service personnel should
install, repair, or service air-conditioning equipment.
Untrained personnel can perform basic maintenance func-
tions of cleaning coils and filters and replacing filters. All
other operations should be performed by trained service
personnel. When working on air-conditioning equipment, ob-
serve precautions in the literature, tags and labels attached
to the unit, and other safety precautions that may apply.
Follow all safety codes. Wear safety glasses and work gloves.
Use quenching cloth for unbrazing operations. Have fire ex-
tinguishers available for all brazing operations.
Before performing service or maintenance operations on
unit, turn off main power switch to unit. Electrical shock
could cause personal injury.
INSTALLATION
Step 1 — Provide Unit Support
ROOF CURB — Assemble and install accessory roof curb
in accordance with instructions shipped with the curb.
Accessory roof curb and information required to field
fabricate a roof curb are shown in Fig. 1 and 2. Install in-
sulation, cant strips, roofing, and counter flashing as shown.
Ductwork can be secured to roof curb before unit is set in
place. Horizontal adapter installation is shown in Fig. 3.
IMPORTANT: The gasketing of the unit to the roof
curb is critical for a watertight seal. Install gasket sup-
plied with the roof curb as shown in Fig. 1. Improp-
erly applied gasket can result in air leaks and poor unit
performance.
Curb should be level. This is necessary to permit unit drain
to function properly. Unit leveling tolerance is 6
1
⁄ 16 in. per
linear ft in any direction. Refer to Accessory Roof Curb In-
stallation Instructions for additional information as required.
ALTERNATE UNIT SUPPORT — When the curb cannot
be used, support unit with sleepers using unit curb support
area. If sleepers cannot be used, support long sides of unit
with a minimum of 3 equally spaced 4-in. x 4-in. pads on
each side.
Step2—RigandPlace Unit — Inspect unit for trans-
portation damage. File any claim with transportation agency.
Keep unit upright, and do not drop. Use spreader bars over
unit to prevent sling or cable damage. Rollers may be used
to move unit across a roof. Level by using unit frame as a
reference; leveling tolerance is 6
1
⁄ 16 in. per linear ft in any
direction. See Fig. 1 for additional leveling tolerance infor-
mation. Unit weight is shown in Table 1.
Four lifting holes are provided in ends of unit base rails
as shown in Fig. 4. Refer to rigging instructions on unit.
POSITIONING — Provide clearance around and above unit
for airflow, safety, and service access (Fig. 5 and 6).
Do not install unit in an indoor location. Do not locate air
inlets near exhaust vents or other sources of contaminated
air.
Although unit is weatherproof, guard against water from
higher level runoff and overhangs.
ROOF MOUNT — Check building codes for weight distri-
bution requirements.
Step 3 — Field Fabricate Ductwork — Secure all
ducts to building structure. Use flexible duct connectors be-
tween unit and ducts as required. Insulate and weatherproof
all external ductwork, joints, and roof openings with counter
flashing and mastic in accordance with applicable codes.
50HJQ014,016
Single-Package Rooftop
Heat Pump Units
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 4
Tab 5a 5a PC 111 Catalog No. 565-001 Printed in U.S.A. Form 50HJQ-5SI Pg 1 2-97 Replaces: 50HJQ-3SI

ACCESSORY
PACKAGE NO. CURB HEIGHT DESCRIPTION ‘‘A’’ ‘‘B’’ ‘‘C’’
50PQ900221 18-29
(305) Standard Curb — 149High ———
50PQ900141 28-09
(610) Standard Curb
for Units Requiring
High Installation ———
50PQ900151 28-09
(610) Horizontal Supply and Return Curb 58-69 (1676) 08-2
1
⁄ 2 9
(64) 18-69 (457)
50DP900211 18-119
(584) Pre-Assembled,
High-Static,
Horizontal Adapter 68-29
(1880) 08-6
1
⁄ 4 9
(159) 18-2
5
⁄ 8 9
(371)
LEGEND
COMP SECT. — Compressor Section
NOTES:
1. Roof curb accessory is shipped unassembled.
2. Insulated panels,
1
⁄ 2 -in. thick neoprene-coated, 2 lb density.
3. Dimensions in ( ) are in millimeters.
4. Direction of airflow.
5. Roof curb: 18 gage steel.
6. Attach all ductwork to roof curb.
NOTE: To prevent the hazard of stagnant water build-up in the drain pan of the
indoor-air section, unit can only be pitched as shown.
Fig. 1 — Roof Curbs and Horizontal Adapter Details
2

Ducts passing through an unconditioned space must be
insulated and covered with a vapor barrier.
The 50HJQ units with electric heat require a 1-in. clear-
ance for the first 24 in. of ductwork.
Outlet grilles must not lie directly below unit discharge.
Step 4 — Make Unit Duct Connections — Unit
is shipped for through-the-bottom duct connections. Duct-
work openings are shown in Fig. 7. Field-fabricated concen-
tric ductwork may be connected as shown in Fig. 8 and 9.
Attach all ductwork to roof curb and roof curb basepans.
Refer to installation instructions shipped with accessory roof
curb for more information.
Step5—TrapCondensate Drain — See Fig. 5
or 6 and 10 for drain location. Plug is provided in drain hole
and must be removed when unit is operating. One
3
⁄ 4 -in. half coupling is provided inside unit indoor air section
for condensate drain connection. An 8
1
⁄ 2 in. x
3
⁄ 4 -in. diam-
eter nipple and a 2-in. x
3
⁄ 4 -in. diameter pipe nipple are coupled
to standard
3
⁄ 4 -in. diameter elbows to provide a straight path
down through holes in unit base rails (see Fig. 11). A trap at
least 4-in. deep must be used.
Step 6 — Make Electrical Connections
FIELD POWER SUPPLY — Unit is factory wired for volt-
age shown on nameplate.
When installing units, provide a disconnect of adequate
size per NEC (National Electrical Code) requirements
(Table 2).
All field wiring must comply with NEC and local
requirements.
Route power lines through control box access panel or unit
basepan (Fig. 5 and 6) to connections as shown on unit wir-
ing diagram and Fig. 12.
NOTE: For preassembled horizontal adapter (part no. 50DP900211),
theaccessorykitincludesafactory-assembled,high-static,regaintran-
sition duct. For horizontal roof (part no. 50PQ900151), a field-
supplied transition duct is required.
Fig. 2 — Horizontal Supply/Return Curb and
Horizontal Adapter Details
NOTE: Part no. 50DP900211 is a fully factory preassembled horizon-
tal adapter which includes an insulated high static regain transition
duct and substantially improves fan static performance.
Fig. 3 — Dimensional Drawing — Horizontal Adapter
Installation
UNIT 50HJQ MAXIMUM
SHIPPING WEIGHT
Lb Kg
014 1895 860
016 2205 1000
DIMENSION A
UNIT 50HJQ Ft-in. mm
014 3-1 948
016 3-6 1059
NOTES:
1. Dimensions in ( ) are in millimeters.
2. Refer to Table 1 for unit operating weights.
3. Remove boards at ends of unit and runners prior to rigging.
4. Rig by inserting hooks into unit base rails as shown. Use corner
postfrompackagingtoprotectcoil fromdamage.Usebumper boards
for spreader bars.
5. Weightsdo not include optionaleconomizer.SeeTable 1forecono-
mizer weight.
6. Weights given are for aluminum evaporator coil plate fins and cop-
per condenser coil plate fins. Weights of other metal combinations
are listed in Table 1.
All panels must be in place when rigging.
Fig. 4 — Rigging Details
3

Table 1 — Physical Data
UNIT SIZE 50HJQ 014 016
208/230, 460 V 575 V
OPERATING WT (lb)
Al/Al* 1615 1925
Al/Al Coated* 1615 1925
Unit Al/Cu* 1745 2075
Cu/Cu* 1815 2165
Electric Heat 65 65
Economizer 110 110
Roof Curb† 200 200
COMPRESSOR Semi-Hermetic
Type (Number) 06D-328 (1) 060-818 (2)
Cylinders 64
Oil Charge (oz.) (each circuit) 115 88
REFRIGERANT TYPE R-22
Charge (lb)
System 1 26.0 16.5
System 2 — 16.5
OUTDOOR COIL
3
⁄ 8 in., Internally-Grooved Copper Tubes, Aluminum or Copper Lanced Fins
Rows 33
Fins/in. 15 15
Total Face Area (sq ft) 21.7 21.7
OUTDOOR FAN Propeller Type, Direct Drive
Nominal Cfm 9,000 9,000
Number...Diameter (in.) 3...22 3...22
Motor Hp (1075 Rpm)
1
⁄ 21 ⁄ 2
Watts Input (Total) 1090 1090
INDOOR COIL
3
⁄ 8 in., Internally-Grooved Copper Tubes, Aluminum or Copper Lanced Fins, Face Split
Expansion Device Fixed Orifice
Rows 33
Fins/in. 15 15
Total Face Area (sq ft) 17.5 17.5
INDOOR FAN Centrifugal, Adjustable Pitch Belt Drive
Quantity...Size (in.) 2...10 x 10 2...10 x 10 2...12 x 12
Nominal Cfm 5000 5000 6000
Fan Rpm Range 862-1132 1201-1462 799-1010
Maximum Allowable Rpm 1550 1550 1550
Motor Pulley Pitch Diameter (in.) 3.1/4.1 4.3/5.3 3.7/4.7
Fan Pulley Pitch Diameter (in.) 6.0 6.4 11.4
Belt, Quantity...Type...Length (in.) 1...BX...42 1...B...45 1...BX...46
Pulley Center Line Distance (in.) 13.5-15.5 13.5-15.5 13.3-14.8
Speed Change Per Turn (rpm) 54 52 42
Pulley Maximum Full Turns 6** 5 6**
Factory Pulley Turns Setting 33
1
⁄ 2 3
Factory Speed Setting (Rpm) 1024 1279 926
Fan Shaft Diameter (in.) 1
3
⁄ 16 1
3
⁄ 16 1
7
⁄ 16
Motor Hp (Service Factor) 3.7 (1.15) 3.0 (1.15) 5.0 (1.15)
Motor Frame Size 56H 56H 184T
Motor Efficiency 0.84 0.84 0.84
HIGH-PRESSURE SWITCH
Cutout (psig) 426
Reset (psig) 320
LOW-PRESSURE/LOSS-OF-CHARGE SWITCH
Cutout (psig) 7
Reset (psig) 22
AIR INLET SCREENS Cleanable
Economizer, Quantity...Size (in.) 2...20 x 25 x 1
1...20 x 20 x 1
RETURN-AIR FILTERS (TYPE) 10% Efficient — 2-in. Throwaway Fiberglass
Quantity... Size (in.) 4...20 x 20 x 2
4...16 x 20 x 2
DEFROST THERMOSTAT
Defrost Time 30 min (Adjustable to 50 or 90 min)
Closes (F) 28
Opens (F) 65
LEGEND
Al — Aluminum
Cu — Copper
*Indoor coil fin material/outdoor coil fin material.
†Weight of 14 in. roof curb.
**Pulley cannot be run at 0 or
1
⁄ 2 turns open.
4

NOTES:
1. Refer to print for roof curb accessory dimensions.
2. Dimensions in ( ) are in millimeters.
3. Center of gravity.
4. Direction of airflow.
5. Ductwork to be attached to accessory roof curb only.
6. Minimum clearance:
• Rear: 78-09(2134) for coil removal. This dimension can be
reduced to 48-09(1219) if conditions permit coil removal
from the top.
• Left side: 48-09(1219) for proper outdoor coil airflow.
• Front: 48-09(1219) for control box access.
• Rightside: 48-09(1219)forproper operation of damper and
power exhaust (if so equipped).
• Top: 68-09(1829) to assure proper outdoor fan operation.
• Local codes or jurisdiction may prevail.
7. With the exception of clearance for the outdoor coil and the
damper/ power exhaust as stated in note no. 6, a removable
fence or barricade requires no clearance.
8. Dimensions are from outside of corner post. Allow 08-
5
⁄ 16 9
(8) on each side for top cover drip edge.
STANDARD UNIT WEIGHT ECONOMIZER WEIGHT
1615 lb (733 kg) 110 lb (50 kg)
Fig. 5 — Base Unit Dimensions — 50HJQ014
5

NOTES:
1. Refer to print for roof curb accessory dimensions.
2. Dimensions in ( ) are in millimeters.
3. Center of gravity.
4. Direction of airflow.
5. Ductwork to be attached to accessory roof curb only.
6. Minimum clearance:
• Rear: 78-09(2134) for coil removal. This dimension can be
reduced to 48-09(1219) if conditions permit coil removal
from the top.
• Left side: 48-09(1219) for proper outdoor coil airflow.
• Front: 48-09(1219) for control box access.
• Rightside: 48-09(1219)forproper operation of damper and
power exhaust (if so equipped).
• Top: 68-09(1829) to assure proper outdoor fan operation.
• Local codes or jurisdiction may prevail.
7. With the exception of clearance for the outdoor coil and the
damper/ power exhaust as stated in note no. 6, a removable
fence or barricade requires no clearance.
8. Dimensions are from outside of corner post. Allow 08-
5
⁄ 16 9
(8) on each side for top cover drip edge.
STANDARD UNIT WEIGHT ECONOMIZER WEIGHT
1925 lb (874 kg) 110 lb (50 kg)
Fig. 6 — Base Unit Dimensions — 50HJQ016
6

Transformers no. 1 and 2 are wired for 230-v unit. If 208/
230-v unit is to be run with 208-v power supply, the trans-
formers must be rewired as follows:
1. Remove cap from red (208 v) wire.
2. Remove cap from orange (230 v) spliced wire.
3. Replace orange wire with red wire.
4. Recap both wires.
IMPORTANT: BE CERTAIN UNUSED WIRES
ARE CAPPED. Failure to do so may damage the
transformers.
Operating voltage to compressor must be within voltage
range indicated on unit nameplate. On 3-phase units, volt-
ages between phases must be balanced within 2% and the
current must be balanced within 10%.
Use the following formula to determine the percentage of
voltage imbalance.
Percentage of Voltage Imbalance
= 100 x max voltage deviation from average voltage
average voltage
Example: Supply voltage is 460-3-60.
AB = 452 v
BC = 464 v
AC = 455 v
Average Voltage = 452 + 464 + 455
3
=1371
3
= 457
Determine maximum deviation from average voltage:
(AB) 457 − 452 = 5 v
(BC) 464 − 457 = 7 v
(AC) 457 − 455 = 2 v
Maximum deviation is 7 v.
Determine the percentage of voltage imbalance:
Percentage of Voltage Imbalance = 100 x 7
457
= 1.53%
This amount of phase imbalance is satisfactory as it is be
low the maximum allowable 2%.
NOTE: Do not drill in this area, as damage to basepan may result in
water leak.
Fig. 7 — Air Distribution — Through-the-Bottom
(50HJQ016 Shown)
NOTE: Do not drill in this area, as damage to basepan may result in
water leak.
Fig. 8 — Concentric Duct Air Distribution
(50HJQ016 Shown)
Shaded area indicates block-off panels.
NOTE: Dimensions A, A8and B, B8are obtained from field-supplied
ceiling diffuser.
Fig. 9 — Concentric Duct Details
3/4" FPT DRAIN
CONNECTION 1-3/8" DRAIN HOLES
Fig. 10 — Condensate Drain Details
7

IMPORTANT: If the supply voltage phase imbalance
is more than 2%, contact your local electric utility com-
pany immediately.
Unit failure as a result of operation on improper line volt-
age or excessive phase imbalance constitutes abuse and may
cause damage to electrical components.
FIELD CONTROL WIRING — Install a Carrier-approved
accessory thermostat assembly according to the installation
instructions included with the accessory. Refer to unit Price
Pages or contact your local representative for more infor-
mation. Locate thermostat assembly on a solid wall in the
conditioned space to sense average temperature.
Route thermostat cable or equivalent single leads of
no. 18 AWG (American Wire Gage) colored wire from
subbase terminals through conduit in unit to low-voltage con-
nections as shown on unit label wiring diagram and in
Fig. 13.
NOTE: For wire runs up to 50 ft, use no. 18AWG insulated
wire (35 C minimum). For 50 to 75 ft, use no. 16 AWG in-
sulated wire (35 C minimum). For over 75 ft, use no. 14
AWG insulated wire (35 C minimum). All wire larger than
no. 18 AWG cannot be directly connected to the thermostat
and will require a junction box and splice at the thermostat.
Set heat anticipator settings as indicated in Table 3. Set-
tings may be changed slightly to provide a greater degree of
comfort for a particular installation.
Refer to accessory remote control instructions as
required.
Step 7 — Make Outdoor-Air Inlet Adjustments
MANUAL OUTDOOR-AIR DAMPER — All units (except
those equipped with a factory-installed economizer) have a
manual outdoor-air damper to provide ventilation air. Damper
can be preset to admit up to 25% outdoor air into return-air
compartment. To adjust, loosen securing screws and move
damper to desired setting. Then retighten screws to secure
damper (Fig. 14).
OPTIONAL FACTORY-INSTALLED ECONOMIZER
Economizer Motor Control Module (Fig. 15-17) — Set to
the ‘‘D’’ setting (Fig. 16). The control module is located on
the economizer motor. See Fig. 15 and 17.
Damper Vent Position Setting
1. Set fan switch at ON position (continuous fan operation),
and close night switch if used.
2. Set system selector switch to OFF position.
3. Turn adjustment screw slowly until dampers assume de-
sired vent position. Do not manually operate economizer
motor since damage to motor will result.
NOTE: Refer to accessory installation instructions included
with the field-installed economizer for installation informa-
tion. Also see Economizer Adjustment section on page 18.
Step 8 — Install Outdoor-Air Hood — The same
type of factory-installed hood is used on units with 25% air
ventilation and units with an economizer.
NOTE: The hood top panel, upper and lower filter retain-
ers, hood drain pan, and filter support bracket are secured
opposite the outdoor air end of the unit. The screens, hood
side panels, remaining section of filter support bracket, seal
strip, and all other hardware are in a package located inside
the return-air filter access panel (Fig. 18).
1. Attach seal strip to upper filter retainer. See Fig. 19.
2. Assemble hood top panel and side panels, upper filter re-
tainer, and hood drain pan (Fig. 20).
3. Secure lower filter retainer and long piece of filter sup-
port bracket to unit. See Fig. 20. Tighten screws.
4. Loosen sheet metal screws for base unit top panel located
above outdoor-air inlet opening.
5. Match notches in hood top panel to unit top panel screws.
Insert hood flange between unit top panel flange and unit.
Tighten screws.
6. Insert outdoor-air inlet screens and spacer in channel cre-
ated by lower filter retainer and filter support bracket.
7. Attach remaining shorter section section of filter support
bracket.
Fig. 11 — Condensate Drain Piping Details
LEGEND
EQUIP GND — Equipment Ground
kcmil — Thousand Circular Mils
NEC — National Electrical Code
TB — Terminal Block
NOTE: The maximum wire size for TB1 is 350 kcmil for all unit
voltages.
Fig. 12 — Field Power Wiring Connections
8

Table 2 — Electrical Data
UNIT
50HJQ VOLTAGE
(3 Ph,
60 Hz)
VOLTAGE
RANGE COMPRESSOR OUTDOOR
FAN
MOTOR INDOOR FAN
MOTOR POWER EXHAUST ELECTRIC HEAT* POWER SUPPLY DISCONNECT SIZING
No. 1 No. 2
Min Max RLA LRA RLA LRA Qty FLA
(ea) Hp FLA FLA LRA FLA kW MCA MOCP† RLA LRA
014
208/230 187 253 39.7 228 — — 3 1.7 3.7 10.5/10.5
—— —/—
39/ 45
72/ 82
117/135
—/—
14/19
26/34
42/56
65/ 65
114/122
155/168
211/200
100/100
125/150
175/175
225/225
64/ 64
64/ 64
94/107
147/167 387/387
4.6 18.8 —/—
39/ 45
72/ 82
117/135
—/—
14/19
26/34
42/56
70/ 70
119/126
159/173
216/205
100/100
125/150
175/175
225/225
69/ 69
69/ 69
100/112
152/173 406/406
460 414 508 19.9 114 — — 3 0.8 3.7 4.8
—— —
18
39
66
—
15
32
55
32
54
81
98
50
60
90
110
31
31
50
82 189
2.3 6.0 —
18
39
66
—
15
32
55
34
57
83
100
50
70
90
110
34
34
53
84 195
575 518 632 16.0 91 — — 3 0.75 3.0 3.9 —— —
37 — 37 26 72 40 80 26 47 91
2.1 4.8 —
37 — 37 28 75 40 80 28 50 96
016
208/230 187 253 28.2 160 28.2 160 3 1.7 5 15.8/15.8
—— —/— 72/ 82
117/135
—/—
26/34
42/56
84/ 84
174/187
231/219
110/110
175/200
250/225
89/ 89
101/112
153/173 499/485
4.6 18.8 —/— 72/ 82
117/135
—/—
26/34
42/56
89/ 89
179/191
235/224
110/110
200/200
250/225
94/ 94
106/118
158/179 518/504
460 414 508 14.1 80 14.1 80 3 0.8 5 7.9
—— — 39
66
—
32
55
42
91
108
50
100
110
44
54
85 238
2.3 6.0 — 39
66
—
32
55
44
93
110
50
100
125
47
57
88 244
575 518 632 11.3 64 11.3 64 3 0.75 5 6.0 —— —
50 — 50 34 96 40 100 35 64 165
2.1 4.8 —
50 — 50 36 98 45 100 38 67 169
LEGEND
FLA — Full Load Amps
HACR — Heating, Air Conditioning and Refrigeration
LRA — Locked Rotor Amps
MCA — Minimum Circuit Amps
MOCP — Maximum Overcurrent Protection
NEC — National Electrical Code
RLA — Rated Load Amps
*Heater capacity (kW) is based on heater voltage of 208 v, 240 v, 480 v and
600 v. If power distribution voltage to unit varies from rated heater voltage,
heater kW will vary accordingly.
†Fuse or HACR circuit breaker. This is the maximum size permissible; smaller
fuse size may be used where conditions permit.
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. The Canadian units may
be fuse or circuit breaker.
2. MCA calculation for units with electric heaters over 50 kW
= (1.25 x IFM amps) + (1.00 x heater FLA).
9

Table 3 — Heat Anticipator Settings
UNIT 50HJQ UNIT
VOLTAGE HEATER kW STAGE 1 STAGE 2
014
208/230 14/19 .40 — 26/34 .40 .40
42/56 .66 .40
460 15 .40 — 32 .40 .40
55 .40 .66
575 37 .40 .66
016
208/230 26/34 .40 .66
42/56 .66 .40
460 32 .40 .40
55 .40 .66
575 50 .66 .66
Step 9 — Defrost Cycle — The defrost timer is fac-
tory set at 30 minutes. The timer may be field-adjusted to
50 or 90 minutes by moving the wire from the 30 minute
contact to the 50 or 90 minute contact.At the end of the time
period, the defrost cycle will begin. See Fig. 21.
Fig. 13 — Field Control Thermostat Wiring
Fig. 14 — 25% Outdoor-Air Section Details
OUTDOOR
AIR
THERMOSTAT
Fig.15 — Economizer DamperAssembly — End View
LED — Light Emitting Diode
Fig. 16 — Economizer Control Module
Fig. 17 — Economizer Control Module Location
10