Installation Manual 24CJ

22
ENGLISH
- Do a leak test of all joints of the tubing(both
indoor and outdoor) and both gas and liquid
side service valves.
Bubbles indicate a leak. Be sure to wipe off
the soap with a clean cloth.
- After the system is found to be free of leaks,
relieve the nitrogen pressure by loosening
the charge hose connector at the nitrogen
cylinder. When the system pressure is
reduced to normal, disconnect the hose from
the cylinder.
*The feature can be changed according a type
of model.
- Remove the caps from the 2-way and 3-way
valves.
- Remove the service-port cap from the 3-way
valve.
- Apply a soap water or a liquid neutral deter-
gent on the indoor unit connection or outdoor
unit connections by a soft brush to check for
leakage of the connecting points of the pip-
ing.
- If bubbles come out, the pipes have leakage
Lo Hi
Outdoor unit
Manifold valve
Charge hose
Nitrogen gas
cylinder(in vertical
standing position)
Pressure
gauge
Indoor unit
Soap water method
- Connect the charge hose end described in
the preceding steps to the vacuum pump to
evacuate the tubing and indoor unit.
Confirm the "Lo" knob of the pressure Gauge
is open. Then, run the vacuum pump.
The operation time for evacuation varies with
tubing length and capacity of the pump. The
following table shows the time required for
Evacuation.
- When the desired vacuum is reached, close
the knob of the 3-way valve and stop the
vacuum pump.
Evacuation
Outdoor unit
Gas side
Liquid side
Cap
2-way valve(Close)
2-way valve(Close)
3-way valve(Close)3-way valve(Close)
2-way valve(Close)
3-way valve(Close)
Required time for Evacuation when 30 gal/h
vacuum pump is used
If tubing length is
less than 10m (33 ft)
If tubing length is
longer than 10m
(33 ft)
10 min. or more 15 min. or more