Gree GMV-1015WM/G-U, Service Manual

Page: 276 / 331

Gree GMV6 DC Inverter VRF Units Service Manual
274
Low pressure
measurement
valve
Before discharging refrigerant and dismantling the unit, collect the refrigeration oil in the system from
the low-pressure measurement valve using the following method. Connect one end of a rubber hose to
the low-pressure measurement valve and the other one to a transparent container. Since that the
container contains the mixture of the refrigerant and lubricant and the refrigerant volatilizes, do not seal
the container. Otherwise, the high pressure in the container may lead to breaking of the container or even
an explosion.
Record the oil quantity after the lubricant is fully discharged.
Step 5: Discharging refrigerant
The refrigerant in the system needs to be discharged from the high and low pressure sides of the
system concurrently. If the refrigerant is discharged from one side only, the sealed scroll will hinder the
refrigerant from being fully discharged. Do not discharge the refrigerant too fast (in no shorter than 12h).
Otherwise, a large amount of lubricant will be discharged together with the refrigerant as well.
The refrigerant is
released by the low-
pressure measurement
valve at the low-
pressure side.
The refrigerant is
released by the high-
pressure sensor at the
high-pressure side.