DC INVERTER U-MATCH AIR CONDITIONERS INSTALLATION
Loosing the cord of liquid valve until the pressure rise to 0 bar.
Dismantle the tube from the cover of the inlet for refrigerant then, tighten the cover.
Loose the valve cord of the gas valve as well as the liquid valve entirely.
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.
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