Leak Test; Vacuum Operation - Gree GC201306 -1 Service Manual

Super Free Match
Service Manual

6.9 Leak Test

1) Please make sure that the stop valves of the outdoor unit are closed during the operation.
2) The leak test should be made by pressurizing nitrogen gas.
3) Open the pressure reducing valve, pressurize the connection pipes to 1.0 MPa (10 bar) slowly, wait ten
minutes, and make sure that the pressure will not drop.
4) Rise the pressure to 4.0 MPa (40 bar) slowly, wait 24 hours, and make sure the pressure will not drop.
5) If the pressure does not decrease, the pipes have passed the test. Otherwise, look for where the gas leaks
from.
NO.
Name Outdoor unit
6.10

Vacuum Operation

1) Make sure that the liquid and gas stop valve of the outdoor unit are closed fully during the operation.
2) As shown in the following figure, expel the gas from the refrigerant pipes by the vacuum pump.
1: Outdoor unit
2: Service port
3: Liquid side stop valve
4: Gas side stop valve
5: Pressure-vacuum gauge
6: Hi-knob
7: Lo-knob
8: Vacuum pump
3) Open the pump and turn on the knobs to evacuate the gas in the liquid and gas pipes.
4) When the pressure of the system is less than -0.1Mpa (-1bar), keep the system for more than one hour
under the condition.
5) Then turn off the knobs and the pump, and if the pressure of the pressure-vacuum gauge does not rise
within 2 hours, the system is under a vacuum. Otherwise, the system has leaked, please look for where the
gas leaks in.
INSTALLATION 112
1 2
Pressure reducing valve
3 4
Nitrogen Liquid side stop valve
5
Gas side stop valve