Hose/Line HVAC: Service and Repair

Refrigerant Lines:

1. DISCHARGE REFRIGERANT IN REFRIGERATION SYSTEM

2. REPLACE FAULTY TUBE OR HOSE

NOTE: Cap the open fittings immediately to keep moisture or dirt out of the system.

3. TORQUE CONNECTIONS TO SPECIFIED TORQUE

NOTE: Connections should not be torque tighter than the specified torque.

Compressor x Discharge hose
Torque: 10 N.m (100 kgf.cm, 7 ft.lbf)

Compressor x Suction hose
Torque: 10 N.m (100 kgf.cm, 7 ft.lbf)

Condenser x Discharge hose
Torque: 10 N.m (100 kgf.cm, 7 ft.lbf)

Condenser x Liquid tube
Torque: 10 N.m (100 kgf.cm. 7 ft.lbf)

Pressure switch x Liquid tube
Torque: 10 N.m (100 kgf.cm, 7 ft.lbf)

A/C unit x Liquid tube
Torque: 10 N.m (100 kgf.cm. 7 ft.lbf)

Expansion valve x Evaporator
Torque: 5.4 N.m (55 kgf.cm. 48 in..lbf)

A/C unit x Suction tube
Torque: 10 N.m (100 kgf.cm, 7 ft.lbf)

Liquid line (union nut)
Torque: 14 N.m (140 kgf.cm, 10 ft.lbf)

Suction line (bolt)
Torque: 10 N.m (100 kgf.cm, 7 ft.lbf)


4. EVACUATE AIR IN REFRIGERATION SYSTEM AND CHARGE WITH REFRIGERANT

Specified amount:
850 ± 50 g (29.98 ± 1.76 oz.)

5. INSPECT FOR LEAKAGE OF REFRIGERANT
Using a gas leak detector, check for leakage of refrigerant.

6. INSPECT AIR CONDITIONING OPERATION