ES AWH11-V5+, User Manual

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4. Maintenance
This system uses R410A refrigerant. It is strictly forbidden to charge any refrigerant other than R410A
into the system.
There must be no air in the refrigerant circulation, because air will cause abnormal high pressure, which
will damage the gas piping and lower heating or cooling efficiency.
If the refrigerant leaks inside the house, please keep windows open for few minutes even R410A
refrigerant do no harm to health.
Refrigerant charge can only be done in cooling operation. Please proceed as followings:
4)
5)
6)
7)
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Note: Always use a weight scale to measure the gas amount charged into the unit.
Needle valve
AWH9/11-V5+
Needle valve
Pressure gauge
R410A
Check with
leakage detector
or soap water if
there is any
leakage.