Filling Of Refrigerants And Test Run - Gree GMV-Pdhm224W/Na-M Installation And Operating Instruction Manual

Filling of Refrigerant and Test Run
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Filling of Refrigerant(it shall be done by professionals)
1. Before shipped out from manufacturer, the outdoor unit has been filled with refrigerant. Additional
refrigerants may be filled when carrying out site connection of pipelines.
2. Check the liquid valve, the low pressure gas valve and the high pressure gas valve of the outdoor unit.
The valves shall be completely shut off.
3. Suck the air in indoor unit and in connecting pipe from liquid valve, low -pressure gas valve and high-
pressure gas valve of outdoor unit with two vacuum pumps and two sets of pressure gages(one of the two
pressure gages only needs one manometer, the other unused manometer should be turned off). Refer to
following Fig.
4. After confirming that there is no leakage from the system, when the compressor is not in operation,
charge additional R410A Refrigerants with specified amount to the unit through the filling opening of the
liquid pipe valve of the outdoor unit.
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Calculating Mass of Additional Refrigerant
1. Mass of Refrigerant in the outdoor unit When Delivered from Manufacturer
Amount of Refrigerant Filled (kg)
Amount of Refrigerant Filled (kg)
Notes:
The mass of refrigerant in the outdoor unit when delivered from manufacturer does not include the
☆
of additional refrigerant needed by the piping connecting the outdoor unit and the indoor unit.
As the length of the connecting pipe is decided on site, the amount of additional refrigerant shall be
☆
decided depending on the size and the length of the liquid pipe used on site.
GMV-Pdhm224W/Na-
M
12
GMV-Pdhm400W/Na-
M
14
66
GMV-Pdhm280W/Na-
M
12
GMV-Pdhm450W/Na-
M
15
GMV-Pdhm335W/Na-M
13
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mass