Carrier 50JX- Manuals

SLAB MOUNT — Place the unit on a solid, level concrete padthat is a minimum of 4 in. thick with 2 in. above grade (Fig. 6). Theslab should extend approximately 2 in. beyond the casing on all 4sides of the unit. Do not secure the unit to the slab except whenrequired by local codes. GROUND MOUNT — The...

Select and size ductwork, supply-air registers, and return air grillesaccording to ASHRAE (American Society of Heating, Refrigera-tion, and Air Conditioning Engineers) recommendations. The unit has duct flanges on the supply- and return-air openings onthe side of the unit. When designing and install...

(where permitted) or onto a gravel apron in ground level installa-tions. Install a field-supplied condensate trap at end of condensateconnection to ensure proper drainage. Make sure that the outlet ofthe trap is at least 1 in. lower than the drain-pan condensateconnection to prevent the pan from ove...

Table 3—Electrical Data—50JX UNIT 50JX SIZE V-PH-HZ VOLTAGE RANGE COMPRESSOR ODFM IDFM ELECTRIC HEAT POWER SUPPLY (MOCP) Min Max RLA LRA FLA FLA KW FLA Min. Circuit Ampacity for Wire Sizing MCA MAX 024 208/230-1-60 187 253.00 10.8 56 0.90 2 -/- 3.75/5.0 7.5/10 -/- 18.1/20.836.1/41.7 -/- 25.1/28.547....

Fig. 15—Electrical Data Legend C99051 452 = 5 v 457 = 7 v455 = 2 v LEGEND FLA — Full Load Amps HACR — Heating, Air Conditioning and Refrigeration IFM — Indoor-Fan Motor LRA — Locked Rotor Amps MCA — Minimum Circuit Amps MOCP — Maximum Overcurrent Protection (fuses or HACR-type circuit breaker) NEC —...

d. Make sure that all tools and miscellaneous loose parts have been removed. 5. Compressors are internally spring mounted. Do not loosen or remove compressor hold-down bolts. 6. Each unit system has 2 Schrader-type ports, one low-side Schrader fitting located on the suction line, and one high-sideSc...

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 l...

NOTE: Be sure that all supply-and return-air grilles are open, free from obstructions, and adjusted properly. Airflow can be changed by changing the lead connection of theblower motor. Unit 50JX three-speed motors (except size 030) are factory wiredfor low speed operation. Unit 50JX 030 is factory w...

MAINTENANCE To ensure continuing high performance, and to minimize thepossibility of premature equipment failure, periodic maintenancemust be performed on this equipment. This heat pump unit shouldbe inspected at least once each year by a qualified service person.To troubleshoot unit, refer to Table...

REFRIGERANT CIRCUIT — Inspect all refrigerant tubing con-nections and the unit base for oil accumulation annually. Detectingoil generally indicates a refrigerant leak. System under pressure. Relieve pressure and recover allrefrigerant before system repair or final unit disposal to avoidpersonal inju...

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 boa...

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 minutes be-tween defrost cycles. Low refrigerant charge Check for leaks, repair and recharge. Metering...