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Installation
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Wiring installation
1.Ensure the following when long pipes are to be welded.
a) Fully install the piping and any welding work before connecting the piping to the unit.
b) Oxygen-free nitrogen should be used inside the pipes to prevent rusting.
2. If there are many joints requiring brazing during installation of long pipes, use an in-line filter. All tu-
bing should be of good quality refrigeration grade dehydrated copper and not normal plumbing grade
copper and should be free of moisture, dust or other contaminants.
3. Please purge the tubing with nitrogen or to remove any dust inside before oxidation.
4. Please install the pipe according to the direction of the pipe, and do not repeatedly bend and then
straighten a piece of pipe more than 3 times (this will damage the copper). Use a pipe bender to bend
the pipe. After preparing a length of pipe, slide the pipe insulation material over it.
5. Once the pipe connection is completed, connect the pipe to the indoor unit using the supplied con-
nection connector. Disconnect the valve fixing nut from the indoor unit and place it on the piping facing
the indoor unit. Fix the piping as shown in this manual, and after coating both the fiare nut and the inside
and outside of the fiare with a light coat of refrigerant oil, tighten the nut using a wrench to tighten the
nut and a spanner to hold the valve on the unit. Always use a wrench with the correct tightening torque
and always fasten the indoor unit valve with another spanner. Do not over-tighten or under-tighten the
torque. This process is done for both small and large pipes.
6. Connect to the outdoor unit in a similar manner.
7. Once the piping connection is completed, carry out a full tightness test on the piping and make sure
that there are no leaks in the piping and connections and that everything is fully insulated.
Thermal insulation and tightness
The copper pipe and the drain pipe must be insulated separately to prevent condensation or water
leakage.
1. The copper pipe must be properly insulated using materials designed for insulating air-conditioning
pipes and resistant to heat above 120ºC.
2. Issues requiring attention in areas with a very high humidity level:
The air conditioner has been tested in various humidity conditions. However, if it is operated for long
periods of time in an environment with a high level of humidity, water droplets will be produced, so the
following thermal insulation should be carried out.
a) The indoor unit should be externally insulated with 10-20 mm thick glass fibre.
b) Normal pipe insulation is about 8 mm for pipes.
3. Wall sealing:
To prevent rainwater or other foreign bodies from entering the room and air conditioner after installing
the pipe and drain pipe, the gap between the hole in the wall and the pipe, drain pipe and electric wire
should be sealed with putty, rubber sealant or mastic, or poor performance or leakage will occur. If the
outdoor unit is higher than the indoor unit, the pipe should be bent to ensure that the lowest point of
the pipe is lower than the hole in the wall to prevent rainwater from entering the room or air conditioner
along the piping system.
4. The air outlet connection must be insulated.
5. The air outlet pipes are connected under insulation.
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