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Carrier 50JS - page 1
50JS,JX018-060 Single-Package Heat Pump Units Installation, Start-Up and Service Instructions NOTE: Read the entire instruction manual before starting the installation. Index SAFETY CONSIDERATIONS ...............................................1-4 General ................................................................................. 4 RECEIVING ...
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Carrier 50JS - page 2
UNIT ELECTRICAL CHARACTERISTICS UNIT WEIGHT UNIT HEIGHT IN. [MM] "A" CENTER OF GRAVITY IN. [MM] lb kg X Y Z 50JS018 208/230-1-60 283 128.4 37.02 [940.3] 19.5 [495.3] 16.8 [425.5] 15.0 [381.0] 50JS024 208/230-1-60 289 131.1 39.02 [991.1] 18.5 [469.9] 16.8 [425.5] 15.0 [381.0] 50JS030 208/230-1-60, 208/230-3-60 287 130.2 39.02 [991.1] 19.5 ...
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Carrier 50JS - page 3
UNIT ELECTRICAL CHARACTERISTICS UNIT WEIGHT UNIT HEIGHT IN. [MM] "A" CENTER OF GRAVITY IN. [MM] lb kg X Y Z 50JS048 208/230-1-60, 208/230-3-60, 460-3-60 353 160.1 38.98 [990.2] 20.5 [520.7] 20.6 [523.8] 17.0 [431.8] 50JS060 208/230-1-60, 208/230-3-60, 460-3-60 418 189.6 38.98 [990.2] 19.5 [495.3] 19.8 [501.7] 17.0 [431.8] 50JX042 208/230- ...
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Carrier 50JS - page 4
Before performing service or maintenance operations on system, turn off main power to unit. Turn off accessory heater power switch if applicable. Electrical shock could cause severe injury or death. Step 1—General The 50JS and 50JX heat pumps are fully self-contained and designed for outdoor installation (See Fig. 1). Standard units are shipped i ...
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Carrier 50JS - page 5
INSPECT SHIPMENT — Inspect for shipping damage while unit is still on shipping pallet. If unit appears to be damaged or is torn loose from its anchorage, have it examined by transportation inspectors before removal. Forward claim papers directly to transportation company. Manufacturer is not responsible for any damage incurred in transit. Check a ...
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Carrier 50JS - page 6
5. Tighten the tension buckle until it is taut. Lifting brackets must be secure in the handholds. 6. Attach field-supplied clevis or hook of sufficient strength to hole in the lifting bracket (See Fig. 8). 7. Attach the 2 safety straps directly to the clevis or hook at the 4 rigging brackets. DO NOT attach the safety straps to the lifting brackets ...
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Carrier 50JS - page 7
Table 1A—Physical Data UNIT SIZE 50JS018 50JS024 50JS030 50JS036 50JS042 50JS048 50JS060 NOMINAL CAPACITY (ton) 1-1/2 2 2-1/2 2-1/2 3-1/2 4 5 OPERATING WEIGHT (lb) 283 289 287 291 323 353 418 COMPRESSOR QUANTITY 1 TYPE RECIPROCATING COMPRESSOR SCROLL COMPRESSOR REFRIGERANT R-22 REFRIGERANT METERING DEVICE Accurater ® Refrigerant (R-22) Quantity ...
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Carrier 50JS - page 8
The units dispose of condensate through a 3/4 in. NPT female fitting that exits on the compressor end of the unit. Condensate water can be drained directly onto the roof in rooftop installations (where permitted) or onto a gravel apron in ground level installa- tions. Install a field-supplied condensate trap at end of condensate connection to ensur ...
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Carrier 50JS - page 9
Fig. 12—Wiring Schematics A00073 FIELD SPLICE TERMINAL (MARKED) TERMINAL (UNMARKED) SPLICE SPLICE (MARKED) F A CT OR Y WIRING FIELD CONTROL WIRING FIELD POWER WIRING ACCESSOR Y OR OPTIONAL WIRING TO INDICA TE COMMON POTENTIAL ONL Y : NOT T O REPRESENT WIRING AHA ADJUST ABLE HEA T ANTICIP A TOR C CONT A CTOR CAP CAP A CITOR CB CIRCUIT BREAKER COMP ...
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Carrier 50JS - page 10
Fig. 13—Wiring Schematics A00074 ...
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Carrier 50JS - page 11
Fig. 14—Wiring Schematics A00075 FIELD SPLICE TERMINAL (MARKED) TERMINAL (UNMARKED) SPLICE SPLICE (MARKED) F A CT OR Y WIRING FIELD CONTROL WIRING FIELD POWER WIRING ACCESSOR Y OR OPTIONAL WIRING TO INDICA TE COMMON POTENTIAL ONL Y : NOT T O REPRESENT WIRING AHA ADJUST ABLE HEA T ANTICIP A TOR C CONT A CTOR CAP CAP A CITOR CB CIRCUIT BREAKER COMP ...
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Carrier 50JS - page 12
Table 3A—Electrical Data—50JS UNIT 50JS SIZE V-PH-HZ VOLTAGE RANGE COMPRESSOR ODFM IDFM ELECTRIC HEAT POWER SUPPLY Min Max RLA LRA FLA FLA Nominal KW* FLA MCA Max Fuse or CRCT Breaker MOCP 018 208/230-1-60 187 253 9 48 0.9 1.8 -/- 3.8/5 7.5/10 -/- 18.1/20.8 36.1/41.7 14.0/14.0 24.8/28.3 47.4/54.3 20/20 25/25 50/60 - - - 024 208/230-1-60 187 253 ...
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Carrier 50JS - page 13
→ Table 3B—Electrical Data—50JX UNIT 50JX SIZE V-PH-HZ VOLTAGE RANGE COMPRESSOR ODFM IDFM ELECTRIC HEAT POWER SUPPLY Min Max RLA LRA FLA FLA Nominal KW* FLA MCA Max Fuse or CRCT Breaker MOCP 024 208/230-1-60 187 253.00 10.8 56 0.90 2 -/- 3.75/5.0 7.5/10 -/- 18.1/20.8 36.1/41.7 16.4/16.4 25.1/28.5 47.6/54.6 20/20 25/30 50/60 - - - 030 208/230- ...
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Carrier 50JS - page 14
be in a conduit until they enter the duct panel; conduit termination at the duct panel must be watertight. Run the high-voltage leads through the power entry knockout on the power entry side panel (See Fig. 2 and 3 for location and size). When the leads are inside the unit, run leads up the high-voltage raceway to the line wiring splice box (See Fi ...
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Carrier 50JS - page 15
SPECIAL PROCEDURES FOR 208-V OPERATION 1. Disconnect the yellow primary lead (w110) from the trans- former. See unit wiring label (See Fig. 12 through 14). 2. Connect the yellow primary lead (w110) to the transformer terminal labeled 200v. Indoor blower-motor speeds may need to be changed for 208-v operation. Refer to indoor airflow and airflow adj ...
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Carrier 50JS - page 16
Fig. 22—Typical Heat Pump Operation, Cooling Mode 1. Hot gas from compressor flows through the 4-way valve and is directed to the outdoor coil. It is then condensed and subcooled through the coil circuits. Refrigerant leaves the outdoor coil by way of the OD Accurater in the bypass position to the liquid line. 2. The refrigerant then feeds the in ...
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Carrier 50JS - page 17
2. Place SYSTEM switch in COOL position and FAN switch in AUTO position. Set control below room temperature. Observe that cooling cycle shuts down when control setting is satisfied. 3. Place system switch in HEAT position. Set control above room temperature. Observe that compressor, outdoor fan, and indoor blower motors start. Observe that heating ...
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Carrier 50JS - page 18
The charging label and the tables shown refer to system tempera- tures and pressures in cooling mode only. A refrigerant charging label is attached to the outside of the service access door. If charge level is suspect in Heating mode, reclaim all refrigerant and charge to nameplate amount. (This information may be obtained from the physical data ta ...
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Carrier 50JS - page 19
INDOOR AIRFLOW AND AIRFLOW ADJUSTMENTS For heating and cooling operation, the recommended airflow is 350 to 450 cfm for each 12,000 Btuh of rated cooling capacity. for units with optional electric heat, the airflow must not be reduced below the levels stated in Tables 2A and 2B. Tables 4A and 4B shows both heating and cooling airflows at various ex ...
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Carrier 50JS - page 20
To change the speed of the blower motor (BM), remove the fan motor speed leg lead from the blower relay (BR). This wire is attached to IGC terminal BM for single-phase and 3-phase units. To change the speed, remove and replace with lead for desired blower motor speed. Insulate the removed lead to avoid contact with chassis parts. For 460-v GE Motor ...
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Carrier 50JS - page 21
Fig. 30—Cooling Charging Chart, 50JX 024 Units C99031 689 100.0 30.0 40.0 50.0 60.0 70.0 80.0 90.0 207 276 345 414 483 551 620 SUCTION LINE PRESSURE (KILOP ASCALS) SUCTION LINE PRESSURE (PSIG) 20.0 -7 27 21 16 10 4 -1 SUCTION LINE TEMPERA TURE (DEG. C) 80.0 70.0 60.0 50.0 40.0 30.0 50JX500219 (024) 60 Hz CHARGING CHART OUTDOOR TEMP F C 125 52 115 ...
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Carrier 50JS - page 22
Failure to follow these warnings could result in serious injury or death: 1. Turn off electrical power to the unit before performing any maintenance or service on this unit. 2. Use extreme caution when removing panels and parts. As with any mechanical equipment, personal injury can result from sharp edges. 3. Never place anything combustible either ...
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Carrier 50JS - page 23
exists, be sure that all supply- and return-air grilles are open and free from obstructions, and that the air filter is clean. When necessary, refer to Indoor Airflow and Airflow Adjustments section to check the system airflow. METERING DEVICES — Refrigerant metering devices are fixed orifices and are located in the inlet header to the indoor and ...
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Carrier 50JS - page 24
Table 5—Cooling and Heating Troubleshooting Chart SYMPTOM CAUSE REMEDY Compressor and outdoor fan will not start Power failure Call power company Fuse blown or circuit breaker tripped Replace fuse or reset circuit breaker Defective thermostat, contactor, transformer, con- trol relay or defrost board Replace component Insufficient line voltage Det ...
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Carrier 50JS - page 25
Cooling and Heating Troubleshooting Chart (cont’d) SYMPTOM CAUSE REMEDY Suction pressure too low (Cool) Dirty air filter Replace filter (Heat) Outdoor coil frosted Move timer on control board to 30 min. between defrost cycles Low refrigerant charge Check for leaks, repair and recharge Metering device or low side restricted Remove source of restri ...
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Carrier 50JS - page 26
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Carrier 50JS - page 27
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Carrier 50JS - page 28
Copyright 2000 CARRIER Corp. • 7310 W. Morris St. • Indianapolis, IN 46231 50js1si 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 101 Catalog No. 565-057 Printed in U.S.A. Form 50JS,JX-1SI Pg 28 5-00 Replaces: 50JX-2SI ...
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