Evacuation Procedures - Hisense AMS-09UR4SNZA2 Service Manual

4 . R E F R I G E R A N T
4 . R E F R I G E R A N T
4-2. Evacuation procedures：
Remove service port cap of the stop valve A and connect gage manifold valve and vacuum
pump to it.
Run the vacuum pump for more than 15 minutes and at this time confirm that the pressure
gage indicates -0.1Mpa(-76 cmHg).
Stop pump and keep the pressure for one or two minutes. Make sure the pressure is no
change(if the pressure is changed to high, there is some leakage for the pipe connection).
Remove gage manifold valve quickly from the service port of the stop valve A.
full open the stop valves A on gas and liquid pipe sides.
Repeat the steps above for other valves(B\C\D), be sure all refrigerant pipes are
connected and evacuated, and all valves are full opend.
Total pipe length is in the range:
No gas charge is needed
Tighten the cap to the service port to obtain the initial status.
F L O W D I A G R A M
F L O W D I A G R A M

EVACUATION PROCEDURES

Connect the refrigerant pipes (both the liquid and
gas pipes) between the indoor and the outdoor units.
Retighten the cap.
11
Total pipe length exceeding the limit:
Charge the prescribed amount of gas.
Leak test