5 Drain Piping
•
Install the drain piping.
•
Make sure that the drain works properly.
•
Prepare polyvinyl chloride pipe with a 32mm outer diameter.
•
The diameter of drain pipe connection hole should be the
same as that of the drain pipe.
•
Keep the drain pipe short and sloping downwards at a
gradient of at least 1/100 to prevent air bubbles.
NOTE
When the relative humidity of inlet or ambient air exceeds 80%,
apply an auxiliary drain pan (field-supplied) beneath the indoor unit
as shown below.
Indoor unit
Auxiliary drain pan
(Field-supplied)
To the
atmosphere
!
CAUTION
Water accumulating in the drain piping can cause the drain to clog.
•
To keep the drain pipe from sagging, space hanging wires
every 1 to 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
insulation material with the clamp.
•
The two areas below should be insulated because
condensation may happen causing water leakage.
•
Drain pipes passing indoors.
•
Drain sockets.
• Referring to the figure below, insulate the drain socket and
drain hose using the included large sealing pad.
Sealing material
Drain hose
Sealing material
!
CAUTION
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, because excessive force is
applied during twisting or bending and may also cause leakage.
• After piping work is finished, check whether drainage flows smoothly.
•
Gradually pour approximately 1000cc of water from the outlet hole
into the drain pan to check drainage flow.
•
Check the drainage as shown below:
Portable pump
Air outlet
Drain outlet
Refrigerant pipes
Bucket
INSTALLATION AND MAINTENANCE
HO2019290HA
15
EN