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the vacuum pump, having the low-pressure end linking to the inlet for refrigerant.
3. Starting the vacuum pump, when the indicator turns to-1 bar, closing the low pressure handle and
stopping vacuumize. keep for 15 minutes, ensuring the pressure of the vacuum watch remains.
4. Take out the valve cover of the gas valve together with 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.
F、Installation of Protective Layer of Connecting Pipe
1. To avoid generation of condensate on the connecting pipe and avoid leakage, the big pipe and the
small pipe of the connecting pipe must be covered by thermal insulation materials, be bundled by
adhesive tape, and be isolated from air.
2. The joint connecting to the indoor unit must be wrapped by thermal insulation material. There shall
be no gap between the connecting pipe joint and the wall of the indoor unit. Refer to Figure 4.
Caution:
After the pipes are wrapped by protective materials, never bend the pipes to form very small angle,
and otherwise the pipes may crack or break.
3. Use adhesive tape to wrap the pipes:
(1) Use adhesive tape to bundle the connecting pipe and the cables together. To prevent condensate
from overflowing out from the drainage pipe, separate the drainage pipe firm the connecting pipe
and the cables.
(2) Use thermal insulation tape to wrap the pipes from the bottom of the outdoor unit until the upper
end of the pipe where the pipe enters the wall. When wrapping thermal insulation tape, the later
circle of tape must cover half of the front circle of tape (Refer to Figure 5).
(3) Wrapped pipe must be fixed to wall using pipe clamps.
No Gap
无间隙
Fig.4
52
Fig.5
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