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English
VACUUMING AND CHARGING
Purging The Piping And The Indoor Unit
Except for the outdoor unit which is pre-charged
with refrigerant, the indoor unit and the
refrigerant connection pipes must be air-purged
because the air containing moisture that remains
in the refrigerant cycle may cause malfunction
of the compressor.
•
Remove the caps from the valve and the
service port.
•
Connect the center of the charging gauge to
the vacuum pump.
•
Connect the charging gauge to the service
port of the 3-way valve.
•
Start the vacuum pump. Evacuate for
approximately 30 minutes. The evacuation
time varies with different vacuum pump
capacity. Confirm that the charging gauge
needle has moved towards -760mmHg.
Caution
•
If the gauge needle does not move to
-760mmHg, be sure to check for gas leaks
(using the refrigerant detector) at flare type
connection of the indoor and outdoor unit
and repair the leak before proceeding to the
next step.
Service port
Outdoor unit 3 ways valve
Flare nut
Refrigerant piping
Allen key
•
Close the valve of the charging gauge and
stop the vacuum pump.
•
On the outdoor unit, open the suction valve
(3 way) and liquid valve (2 way) (in anti-
clockwise direction) with 4mm key for
hexagon sacked screw.
•
All wires must be firmly connected.
•
All wires must not touch the refrigerant piping, compressor or any moving parts of the fan
motor.
•
The connecting wires between the indoor and the outdoor unit must be clamped on the wire
clamps.
•
The power supply cord must be equivalent to H05RN-F (245IEC57) which is the minimum
requirement.