Hose/Line HVAC: Service and Repair

REPLACEMENT

1. DISCHARGE REFRIGERANT IN REFRIGERATIONS 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 torqued 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)
Receiver x Liquid tube
Torque: 5.4 N.m (55 kgf.cm, 48 in.lbf)
Pressure switch x Liquid tube
Torque: 10 N.m (100 kgf.cm, 7 ft.lbf)
Cooling 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)
Cooling unit x Suction tube
Torque: 10 N.m (100 kgf.cm, 7 ft.lbf)
Liquid line (Piping joint)
Torque: 14 N.m (140 kgf.cm, 10 ft.lbf)
Suction line (Block joint)
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.
If there is leakage, check the tightening torque at the joints.

6. INSPECT AIR CONDITIONING OPERATION