Gree U-MATCH GFH09K3CI, Service Manual

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A/A DC INVERTER U-MATCH AIR CONDITIONERS INSTALLATION
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‹ Tighten the valve cover of the gas valve and liquid valve so as to check whether leakage occurred.
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 cover half
of the front circle of tape (Figure 3-1-7).
‹ Wrapped pipe must be fixed to wall using pipe clamps.
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.
‹ Do not wrap the protective tape too tight, otherwise the efficiency of thermal insulation may be decreased.
Ensure that the condensate drainage flexible tube is separate from the bundled pipes.
‹ After the protective work is completed and the pipes are wrapped, use seal material to block the hole in the wall,
so as to prevent rain and wind from entering the room.
3.2 Caution in Connecting Pipes
The layout of connection pipes shall be in reference to the following principles according to site conditions:
‹ Shorten the connection pipe to minimum, preferably within 5m.
‹ Reduce the height difference between indoor and outdoor units as it might be.
‹ Minimize the number of elbows on connection pipe.
‹ If the connection pipe is longer than 20m, it is needed to check if the lubricating oil in the system is enough.
Add if needed.
‹ The refrigerant charge volume inside the machine is suitable for 7m connection pipe. To extend the length of
connection pipe, it is needed to add an appropriate quantity of refrigerant. For extension of pipe length by every
1 meter, the refrigerant to be added is as follows. The maximum allowable length of pipe is as follows.
‹ If the height difference between indoor and outdoor units is over 10m, it is required to install an oil trap every 6