12
Indoor Unit
Installation
CAUTION
Ceiling
Drain Pump use
Drainage hole
Front of view
1.
Install declination
of the indoor unit is very
important for the drain
of the duct type
air conditioner.
2. Minimum thickness of the insulation for the connecting pipe shall be 19mm.
• The unit must be horizontal or declined to the drain hose connected
when finished installation.
• Drain piping must have down-slope (1/50 to 1/100):
be sure not to provide up-and-down slope to pre-
vent 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 flexible
drain hose to the drain port on the indoor unit.
Heat insulation material: Polyethylene foam with
thickness more than 8 mm.
Drain test
Upward
routing
not allowed
Pipe clamp
Maintenance
drain port
Indoor unit
Feed water
Drain Pump
Drain pan
Flexible drain hose
Main
drain pipe
Glue the joint
Drain
port
Drain hose connection
Use the clip
Drain Piping
