Vacuum Pumping; Leakage Detection - Whirlpool ASV09000R Installation Manual

Vacuum pumping

Use 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
c h a r g i n g h o s e t o t h e
vacuum pump.
3. Open the piezometer com-
pletely 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.
7. Reinstall the handle.
Note:
- In case of removing value cap indoor unit, remove a nut with small
diameter firstly. Otherwise, seal cap with bigger diameter will fly out.

Leakage detection

1. With leakage detector:
Check if there is leakage with leakage detector.
2. With soap water:
If leakage detector is not available, please use soap water for leakage
detection. Apply soap water at the suspected position and keep the soap
water for more than 3 mins. If there are air bubbles coming out of this
position, there's a leakage.
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