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DC Inverter Cassette Type Air Conditioner Installation and Operation Manual
watch remains.
● Take out the valve cover of the gas valve together with the liquid valve.
● 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.
2. Gap Leakage Check
Check if it leaks or not by applying soapsuds on every joint and then inspect
carefully. After the check, wipe them off completely.
Cover the indoor unit joint with pipe insulation and four plastic bands to prevent
condensing at joints.
8.5.8 Liquid Pipe and Drain Pipe
● If the outdoor unit is installed lower than the indoor unit .
● A drain pipe should be above ground and the end of the pipe does not dip
into water. All pipes must be restrained to the wall by saddles.
● Taping pipes must be done from bottom to top.
● All pipes are bound together by tape and restrained to wall by saddles.
● If the outdoor unit is installed higher than the indoor unit .
● Taping should be done from lower to the upper part.
● All pipes are bound and taped together and also should be trapped to
prevent water from returning to the room .
● Restraint all pipes to the wall with saddles.
8.5.9 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 the figure on right.
Caution:
① 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.
② Do not wrap the protective tape too tight, and otherwise the efficiency of thermal insulation may be
decreased. Ensure that the condensate drainage flexible tube is separate from the bundled pipes.
③ After the protective work is completed and the pipes are wrapped, use seal material to block the hole in
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