103
EN
Installation of the Vacuum Pump
1 Remove the valve caps on the liquid valve and gas valve and the nut of refrigerant
charging vent.
2 Connect the charging hose of piezometer to the refrigerant charging vent of gas
valve and then connect the other charging hose to the vacuum pump.
3 Open the piezometer completely and operate for 10-15min to check if the pressure
of piezometer remains in -0.1MPa.
4 Close the vacuum pump and maintain this status for 1-2min to check if the pressure
of piezometer remains in -0.1MPa. If the pressure decreases, there may be
leakage.
5 Remove the piezometer, open the valve core of liquid valve and gas valve
completely with inner hexagon spanner.
6 Tighten the screw caps of valves and refrigerant charging vent.
Leakage Detection
With Leakage Detector
Check if there is leakage with leakage detector.
Liquid valve
Piezometer
Inner hexagon
spanner
Vacuum pump
Valve cap
close
open
Gas valve
Refrigerant
charging vent
Nut of refrigerant
charging vent
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