Gree GKH12K3BI, Service Manual

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73
U-MATCH Air
Conditioners
Service Manual
‹ Tighten the valve caps and use soapy water or a leak detector to check any leakage on indoor unit,
outdoor unit and connection parts of pipes.
Caution:
If conditions are allowed, a vacuum pump shall be used for drawing off air inside the system at a valve. Method
for creation of vacuum by using a vacuum pump is as follows:
‹ Take out the nut cover of the inlet for refrigerant.
‹
Connect the tube of the vacuum watch with the vacuum pump, having the low-pressure end linking to the
inlet for refrigerant. (As shown in Figure 3-1-5)
Pressure Gage Pressure Gage
³/2´.QRE
³+,´.QRE
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Vacuum Pump
Connecting Hose Gas Valve
Figure 3-1-5
‹ Starting the vacuum pump, when the indicator turns to-1 bar, closing the low pressure handle and stopping
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‹ Dismantle the tube from the cover of the inlet for refrigerant then, tighten the cover.
‹
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‹
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3. Installation of Protective Layer of Connecting Pipe
‹
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.
‹ 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 3-1-6.
Figure 3-1-6 Figure 3-1-7
‹
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.
‹ 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