- 69 -
(4) Air Purging of the Pipings and indoor unit
The air which contains moisture remaining in the is refrigeration cycle may cause a malfunction on the
compressor.
1. Confirm that both the liquid side valve and the gas side valve are set to the closed position.
2. After connecting the piping, check the joints for gas leakage with gas leak detector.
3. Remove the service port nut, and connect the gauge manifold and the vacuum pump to the service port
by the charge hose.
4. Vacuum the indoor unit and the connecting pipes until the pressure in them lowers to below-76cmHg.
5. Disconnect the charge hose and fit the nut to the service port.
(Tightening torque: 1.8kg.m)
6. Remove the valve stem nuts, and fully open the stems of the Liquid and Gas side service valves with a
hexagon wrench.
7. Tighten the valve stem nuts of the Liquid and Gas side service valve.
Indoor unit
Outdoor unit
Liquid side
Gas side
OPEN
OPEN
Vacuum pump
Closed
3-way
valve
Closed
3-way
valve
Summary of Contents for A2UN186FA0
Page 104: ... 104 Electronic Control Device 1 Room Type Indoor Unit MAIN P C B DC ASM MAIN P C B AC ASM ...
Page 105: ... 105 2 Cassette Type Indoor Unit MAIN P C B DC ASM ...
Page 106: ... 106 3 Art Cool Type Indoor Unit TOP VIEW BOTTOM VIEW ...
Page 107: ... 107 4 Convertible Type Indoor Unit ...
Page 109: ... 109 6 SUB P W B ASSEMBLY Art Cool Type Indoor Unit TOP VIEW BOTTOM VIEW ...
Page 110: ... 110 7 Outdoor Unit MAIN P C B ASM V P U N W ...
Page 111: ... 111 Schematic Diagram 1 Room Type Indoor Unit ...
Page 113: ... 113 3 Art Cool Type Indoor Unit ...
Page 114: ... 114 4 Convertible Type Indoor Unit RY 4WAY RY OUTFAN ...
Page 132: ...P No 3828A20097N August 2003 Printed in Korea ...