28
INSTALLATION
ENGLISH
Soap water method
- Remove the caps from the 3-way(#1) and 3-
way(#2) valves.
- Remove the service-port cap from the 3-
way(#2) valve.
- To open the 3-way(#1) valve turn the valve
stem counterclockwise approximately 90°,
wait for about 2~3 sec, and close it.
- Apply a soap water or a liquid neutral deter-
gent on the indoor unit connection or out-
door unit connections by a soft brush to
check for leakage of the connecting points of
the piping.
- If bubbles come out, the pipes have leakage
Gas side
Liquid side
Cap
Hexagonal wrench
3-way(#1)
valve
(Open)
3-way(#2)
valve
(Close)
Evacuation
- If the system is found free from all leakages,
relive the nitrogen pressure by loosening the
charge hose connector at nitrogen cylinder.
Disconnect the hose from cylinder when
pressure reaches to normal state.
- Evacuation: Connect the charge hose end to
the vacuum pump and evacuate the connect-
ing of the and indoor unit. Check that the
“Lo” knob of manifold is open. Run the vac-
uum pump.
Confirm the "Lo" knob of the manifold valve
is open. Then, run the vacuum pump.
The operation time for evacuation varies with
tubing length and capacity of the pump.
The degree of vacuum should be under 0.8
Torr.
When the desired vacuum is reached, close
the "Lo" knob of the manifold valve and stop
the vacuum pump.
Indoor unit
Outdoor unit
Lo
Hi
Manifold valve
Vacuum pump
Open
Close
Vaccum
gauge
