Gree DC Inverter Multi VRF Service Manual page 162

DC INVERTER MULTI VRF
Refrigerant cylinder
b. Open pressure gauge valve V
required 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 V
gauge is connected to the refrigerant filling nozzle on the small valve of outdoor unit. Open V
charge gas state refrigerant into 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
Pressure gauge connector valve
Gas liquid
Spring balance
, then fill liquid state refrigerant into the liquid pipe side until
H
and discharge air in the hose. The high pressure end of pressure
H
Amount of charging refrigerant Kg
Unit 1
Unit 2
.........
Unit n
INSTALLATION
Connector on gas side
Connector on liquid side
and
L
159