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20
AIR PURGING AND LEAKAGE TEST
1. Take out the nut cover of the inlet for
refrigerant.
2. Connect the tube of the vacuum watch
with the vacuum pump, having the low-
pressure end linking to the inlet for refri-
gerant.
3. Starting the vacuum pump, when the
indicator turns to -1 bar, closing the low
pressure handle and stopping vacuu-
mize. Keep for 15 minutes, ensuring the
pressure of the vacuum watch remains.
4. Take out the valve cover of the gas
valve and also the one for the liquid
valve.
5. Loosing the cord of liquid valve until the
pressure rise to 0 bar.
6. Dismantle the tube from the cover of the
inlet for refrigerant then, tighten the
cover.
7. Loose the valve cord of the gas valve as
well as the liquid valve entirely.
8. Tighten the valve cover of the gas valve
and liquid valve so as to check whether
leakage occurred.
Outdoor condensation drainage
When the unit is cooling or defrosting, the
waste water formed in the outdoor unit can
be drained out reliably through the drain
hose.
Installation:
Install the outdoor drain elbow in the
25 mm (1”) hole on the base plate as
shown in Fig.8, and joint the drain hose to
the elbow, so that the waste water formed
in the outdoor unit can be drained out to a
proper place.
Pressure gauge
Nut
Liquid
pipe
Gas
pipe
Vacuum pump
Base plate
Outdoor drain
elbow