Datasheet

Installation5RMI0-02A
109
Inverter Single
Soap water method
1. Remove the caps from the 2-way and 3-way valves.
2. Remove the service-port cap from the 3-way valve.
3. Apply a soap water or a liquid neutral detergent on the
indoor unit connection or outdoor unit connections by a
soft brush to check for leakage of the connecting points
of the piping.
4. If bubbles come out, the pipes have leakage
Evacuation
1. 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.
2. When the desired vacuum is reached, close the knob of
the 3-way valve and stop the vacuum pump.
Finishing the Job
- With a service valve wrench, turn the valve of liquid side
counter-clockwise to fully open the valve
- Turn the valve of gas side counter clockwise to fully
open the valve
- Loosen the charge hose connected to the gas side
service port slightly to release the pressure, then
remove the hose.
- Replace the flare nut and its bonnet on the gas side
service port and fasten the flare nut securely with an
adjustable wrench. This process is very important to
prevent leakage from the system
- Replace the valve caps at both gas and liquid side
service valves and fasten them tight. This completes air
purging with a vacuum pump.
- Replace the pipe cover to the outdoor unit by one screw.
Now the air conditioner is ready for test run.
Cap
Gas side
Liquid side
3-way valve
(Close)
2-way valve
(Close)
Outdoor unit
Lo Hi
Manifold valve
Vacuum pump
Pressure
gauge
Open
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