10
5.Drain piping
Install the drain piping
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Make sure the drain works properly .
Prepare polyvinyl chloride pipe with a 32mm outer
diameter.
The diameter of drain pipe connection hole should
be same as that of the drain pipe.
Keep the drain pipe short and sloping down wards at
a gradient of at least 1/100 to prevent air pockets from
forming.
Refrigerant pipes
Drain pipe connection hole
(external straight pipe thread)
Water accumulating in the drain piping can cause
the drain to clog.
Refrigerant
pipes
Bucket
Portable pump
Air outlet
Drain outlet
Installation and Maintenance
CAUTION
CAUTION
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To keep the drain tube from sagging, space hanging
wires every 1 to 1.5 m.
Use the drain hose and the clamp. Insert the drain
hose fully into the drain socket and firmly tighten the
drain hose and warm-keeping material with the clamp.
The two areas below should be insulated because
condensation may form there and cause water leakage.
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Drain piping passing indoors
Drain sockets.
Referring the figure below, insulate the drain socket
and drain hose using the included large sealing pad.
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Drain piping connections
Do not connect the drain 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.
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Do not twist or bend the drain hose , so that excessive
force is not applied to it.
This type of treatment may cause leaking.
After piping work is finished, check drainage flows
smoothly.
Gradually insert approximately 1000 cc of water into
the drain pan to check drainage in the manner described
below.
Gradually pour approximately 1000 cc of water from
the outlet hole into the drain pan to check drainage.
Check the drainage.
Drain hose
Sealing material
Sealing material
When
the
relative
humidity of inlet or ambient air
exceeds 80%, apply an (field-supplied) auxiliary
drain pan beneath the indoor unit as shown below.
