Refrigerant Collecting - Gree Versati GRS-CQ4.0PdG/NhH-E Owner's Manual

SPLIT TYPE
(2) Check the liquid valve and the gas valve of the outdoor unit. The valves shall be completely shut off.
(3) Connect a vacuum pump to the liquid valve and the gas valve of the outdoor unit to remove air from the
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valve of the outdoor unit.
Be sure to charge the specified amount of refrigerant in liquid state to the liquid pipe. Since this
refrigerant is a mixed refrigerant, adding it in gas form may cause the refrigerant composition to change,
preventing normal operation.
Before charging, check whether the refrigerant cylinder is equipped with a siphon tube or not.
With siphon tube
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‡ Do not use mixture of refrigerant vapor and air or oxygen for pressurizing for fear of explosion.

16. Refrigerant Collecting

When relocating or disposing of the indoor/outdoor unit, pump down the system following the procedure below
so that no refrigerant is released into the atmosphere.
(1) Turn off the power supply (circuit breaker).
(2) Connect the low-pressure valve on the gauge manifold to the charge plug (lowpressure side) on the outdoor
unit.
(3) Close the liquid stop valve completely.
(4) Supply power (circuit breaker).
Start-up of the indoor-outdoor communication takes about 3 minutes after the power (circuit breaker) is turned
on. Start the pump-down operation 3 to 4 minutes after the power (circuit breaker) is turned on.
(5) Perform the refrigerant collecting operation.
At the commissioning parameter setting page, by touching "Refri. recovery", it will access to the refrigerant
recovery page.
Pressure meter
"Lo"knob
Liquid valve
Connection pipe
Gas valve
WARNING
Air-to-water Heat Pump All in One Versati
Pressure meter
"HI"knob
Vacuum pump
NOTE
27
No siphon tube