GM-820A-Dual A/C SYSTEM MAINTENANCE CENTRE-DUAL
17
Note: the new vacuum pump oil cannot be filled too much into the vacuum pump otherwise it will spray
out when working.
C-4: Re-back the cover.
12-8) Discharge non-condensable gases
A. Due to some uncontrollable reasons, after a period of time, some incompressible gas will be
accumulated in the tanks. If the gas is too much, it will cause abnormal operation of the equipment.
B. It is necessary to discharge non-condensable gases regularly, and it is recommended to do it once a
month (if the use frequency is low, the exhaust cycle can be extended). Or, when the machine appear
the High-pressure Alarm, it need do it immediately.
C. Operations:
C-1: Remove the rear refrigerant tank and place it aside. Note: do not remove any pipes!
C-2: Open the back door, and there are two exhaust valves in the left middle of the machine. Open the
valve slowly to discharge non-condensable gases.
Attention: slowly rotate the valve handle, stop the rotation when you hear the exhaust sound, and let
the exhaust stand still.
Left valve -R1234yf tank exhaust Right valve - R134a tank exhaust
C-2: The exhaust time is about 20 seconds.
Warning: when exhausting, it is necessary to cut off the power supply and carry out it in a ventilated
environment, and no fireworks are allowed!
13) Supply tank
R1234yf
exhaust valve
R134a
exhaust valve
