10
INSTALLATION OF INDOOR
ENGLISH
Maintenance
drain port
Upward
routing
not allowed
Pipe clamp
Indoor unit
Indoor Unit Drain Piping
- 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 32 mm.
Piping material: Polyvinyl chloride pipe VP-25
and pipe fittings
- Be sure to execute thermal insulator on the
drain piping.
- Install the drain raising pipes at a right
angle to the indoor unit and no more than
300 mm from the unit.
Thermal insulator material: Polyethylene foam
with thickness more than 8 mm.
Drain test
- 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.
- When the test is complete, connect the flexi-
ble drain hose to the drain port on the indoor
unit.
1
Remove the air filter.
2
Check the drain.
- Spray one or two glasses of water upon
the evaporator.
- Ensure that water flows drain hose of in-
door unit without any leakage.
Feed water
Flexible drain hose
(accessory)
Main
drain pipe
Glue the joint
Air filters
