12
INSTALLATION OF INDOOR
ENGLISH
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
flexible 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
indoor unit without any leakage.
Piping insulation
- Loosen the flare nut of the indoor unit's
piping connection port, insert it into the liquid
pipe and the gas pipe, and then conduct
flaring work on the ends of each pipe.
- Insulate each of the liquid pipes and gas
pipes using insulation material for piping.
- Use the piping insulation included in the
accessories to once again insulate the piping
connection part of the gas pipe as shown
below. (Piping insulation must be at least
19 mm thick)
Feed water
Flexible drain hose
(accessory)
Main
drain pipe
Glue the joint
Air filters
Maintenance
drain port
Upward
routing
not allowed
Pipe clamp
Indoor unit
Ⓐ
Liquid piping
Ⓑ
Gas piping
Ⓒ
Power cable
Ⓓ
Insulation material
Ⓔ
Communication
cable
Electrical
wire
Communication
cable
Indoor unit
main body
Piping insulation
material (accessory)
Insulation material for connecting
piping (sold separately)
Band
Have them overlap.
Adhere so that there are no gaps.
Separate
Fully insulate the connection parts.
