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Application Information AWM-G-2009
Diagram shows typical charging method.
Caution For R410A
Avoid prolong exposure of an opened compressor, or the internal part of refrigerant pipingto moist air. The POE oil in
the compressor and piping can absorb moisture from air.
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Final Checking
Ensure that steps 1 to 8 are closely followed.
Ensure the following, in particular :
1) The unit is mounted solidly and rigidly in position.
2) Piping and connections are leak proof after charging.
3) Proper wiring has been done.
Trial run
1) Conduct a trial run after water drainage test and gas leakage test.
2) Watch out for the following :-
a) Is the electric plug fi rmly inserted into the socket?
b) Is there any abnormal sound from unit?
c) Is there any abnormal vibrations with regard to unit itself or pipings?
d) Is there smooth drainage of water?
Check that :
1) Condenser fan is running, with warm air blowing off the condensing unit.
2) Evaporator blower is running and discharging cool air.
3) Suction (Low side) pressure as per recommended.
4) The remote controller incorporate a 3 minute delay in their circuit. Thus, it requires about 3 minutes
uponcut off before the outdoor condensing unit can start up.
SPECIAL PRECAUTIONS WHEN DEALING WITH REFRIGERANT R410A UNIT
1) WHAT IS NEW REFRIGERANT R410A?
R410A is a new HFC refrigerant which does not damage the ozone layer. The working pressure of
thisnew refrigerant is 1.6 times higher than conventional refrigerant (R22), thus proper installation /
servicingis essential.
2) COMPONENTS
Mixture weight composition R32(50%) and R125(50%)
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