11
5. Drain Piping
Install the drain piping
·
Make sure the drain works properly .
Prepare polyvinyl chloride pipe with a 1-1/4 in.(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.
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
·
pip
To keep the drain
e from sagging, space hanging
wires every 3.3 ft. (1m) to 5.0 ft. (1.5m).
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 happen there causing water
leakage.
·
Drain piping passing indoors
Drain sockets.
·
Referring the figure below, insulate the drain socket
·
and drain hose using the included large sealing pad.
Drain piping connections
Do not connect the drain pipes directly to sewage
·
pipes to avoid ammonia odour. The ammonia in the
sewage might enter the indoor unit through the drain
pipes and corrode the heat exchanger.
Do not twist or bend the drain hose, doing so applies
·
excessive force applied on it and may also cause
leakage.
After piping work is finished, check if drainage flows
·
smoothly.
Gradually pour approximately 1000 cc of water from
·
the outlet hole into the drain pan to check drainage
flow.
Check the drainage as shown below:
·
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.
Indoor Unit
To the Atmosphere
(Field-Supplied)
Auxiliary Drain Pan
