Installation Manual 11
Installation
ENGLISH
• Drain piping must have down-slope (1/50 to 1/100): be sure not to
provide up-and-down slope to prevent reversal flow.
• During drain piping connection, be careful not to exert extra force
on the drain port on the indoor unit.
• The outside diameter of the drain connection on the indoor unit is
32mm.
•
Be sure to install heat insulation on the drain piping.
Piping material: Polyvinyl chloride pipe VP-25 and
pipe fittings
The air conditioner uses a drain pump to drain water.
Use the following procedure to test the drain pump operation:
• Connect the main drain pipe to the exterior
and leave it provisionally until the test
comes to an end.
• Feed water to the flexible drain hose and
check the piping for leakage.
• Be sure to check the drain pump for normal
operating and noise when electrical wiring
is complete.
• When the test is complete, connect the flex-
ible drain hose to the drain port on the
indoor unit.
Heat insulation material: Polyethylene foam with thick-
ness more than 8 mm.
Drain test
Drain Piping
CAUTION : The supplied flexible
drain hose should not be curved,
neither screwed. The curved or
screwed hose may cause a leakage
of water.
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