Gree GMV-PD160W/NAB-M

83
DC Inverter Multi
VRF Service Manual
5.12.2 Steps of refrigerant charge are as follows:
a. The connecting hose of refrigerant cylinder shall be connected to the connector of the pressure gauge.
The valve VH shall be opened to discharge air in the hose. Then, the high pressure end of the pressure gauge
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Refrigerant cylinder
Spring balance
Connector on gas side
Connector on liquid side
Pressure gauge connector valve
Gas liquid
VH VL
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amount is reached.
If refrigerant can not be charged in system unless the unit is turned on, let the system run at full-load
cooling mode. Open VH and discharge air in the hose. The high pressure end of pressure gauge is connected
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the gas pipe until required charging amount is reached.
c. Observe electronic balance or spring balance. When required amount is reached, the valve shall be
closed very quickly and then source valve on the refrigerant valve shall be shut off
d. The amount of charging refrigerant shall be recorded.
Refrigerant charge shall be recorded as per the following table.
Unit Mark Amount of charging refrigerant(kg)
Unit 1
Unit2
………
Unitn
6 INSTALLATION OF CONDENSATE PIPE
6.1Material Quality Requirements for Condensate Pipe
Generally, the condensate pipe shall be water supply U-PVC pipe, adhered by using special glue. The
other materials available include: PP-R pipe, PP-C pipe and hot-dipped galvanized steel pipe. It is not allowed
to use aluminum plastic composite pipe.
6.2 Key Points for Condensate Pipe Installation
6.2.1 Work Order
Installation
of indoor unit
Sheathing of thermal
insulation pipe on
condensate pipe
Connection of
drainage pipe
Water test
Thermal insulation
of drainage pipe
6.2.2 Determine the direction and elevation of condensate pipe before installation. To ensure the gradient
smooth and straight, avoid intersecting with other pipelines. The height of the clamp fixing the pipe hanger
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