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4 CONNECT THE DRAIN PIPE
4.1 Installation of drain piping
Install the drain piping as shown in figure below and take measures
against condensation. Improperly rigged piping could lead to leaks
and eventually wet furniture and belongings.
- Keep piping as short as possible and slope it downwards at a
gradient of at least 1/100 so that air may not remain trapped
inside the pipe.
- Keep pipe size equal to or greater than that of the connecting
pipe (PVC pipe, nominal diameter 20mm/0.8in in, outside
diameter 25mm/1in).
- Push the drain hose as far as possible over the drain socket,
and tighten the metal clamp securely.
- If the drain hose cannot be sufficiently set on a slope, fit the
hose with drain raising piping (field supply).
- Insulate the drain hose inside the building.
- Connect the drain hose to the drain raising pipes, and
insulate them.
- Connect the drain hose to the drain outlet on the indoor unit,
and tighten it with the clamp.
4.3 How to perform piping
Precautions
- Install the drain raising pipes at a height of less than 530 mm
/20.9 in.
- Install the drain raising pipes at a right angle to the indoor
unit and no more than 300 mm/11.8 in from the unit.
- To prevent air bubbles, install the drain hose level or slightly
tilted up (<75 mm/3 in).
- The incline of drain hose should be 75 mm/3 in or less so
that the drain socket does not have to withstand additional force.
- To ensure a downward slope of 1:100, install hanging
bars every 1m/3.3ft to 1.5 m/4.9ft.
- When unifying multiple drain pipes, install the pipes as
shown in figure below. Select converging drain pipes whose
gauge is suitable for the operating capacity of the unit.
1 Ceiling slab
2 Hanger bracket
3 Adjustable range
4 Drain raising pipe
5 Drain hose
6 Metal clamp
1 T-joint converging drain pipes
12
1 Hanging bar
2 ≥1/100 gradient
1 Drain socket (attached to the unit)
2 metal clamp
3 Drain hose
4 Insulation (field supply)
- Make sure that heat insulation work is executed on the
following 2 spots to prevent any possible water leakage due
to dew condensation.
1 Indoor drain pipe.
2 Drain socket.
1 2
3 4
0-530
100
1
1
1-1.5m
1
2
√
×
4.2 Install the drain pipes.
Drain piping connections
Do not connect the drain piping directly to sewage
pipes that smell of ammonia. The ammonia in the
sewage might enter the indoor unit through the drain
pipes and corrode the heat exchanger.
Keep in mind that it will become the cause of getting
drain pipe blocked if water collects on drain pipe.
Unit: mm
Unit: mm
3~5ft
1
2
0~75
5
1~1.5m
≤300/11.8in
6
5
4
3
220/8.7in
≤750/29.5in
0~3in
≤530/20.9in
3~5ft
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