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Connecting drain pipe

• Connect a hard socket (locally procured) to the hard

socket of the attached supplied flexible hose.

• Connect a drain pipe (locally procured) to the

connected hard socket.

REQUIREMENT

• Connect hard vinyl chloride pipes securely using an

adhesive for vinyl chloride to avoid water leakage.

• It takes some time until the adhesive is dried and

hardened (refer to the manual of the adhesive). Do not
apply stress to the joint with the drain pipe during this
time period.



Drain up

When a down-gradient cannot be secured for the
drainpipe, drain-up piping is possible.
• The height of the drain pipe must be 850 mm or less

from the bottom of the ceiling.

• Take the drain pipe out of the drain pipe joint with the

indoor unit in 300 mm or less, and bend up the pipe
vertically.

• Immediately after the pipe is bent up vertically, lay

the pipe making a down-gradient.

• Set downward grading immediately after raising up

vertically.



Check the draining

In the test run, check that water drain is properly
performed and water does not leak from the connecting
part of the pipes.
Check that there are no abnormal motor sounds from
the drain pump as well.
Check draining also when installed in heating period.
By using a pitcher or hose, pour water (1500 - 2000 cc)
into the discharge port before installation of the ceiling
panel.
Pour water gradually so that water does not spread on
the motor of the drain pump.

CAUTION

Pour water gently so that it does not spread around
inside the indoor unit, which may cause a malfunction.

Adhesive inhibited:

Use the attached flexible hose and hose band for

connecting the drain hose to the clear drain socket.

If applying the adhesive, socket will be damaged and

cause water leakage.

Drain pipe

connecting port

(Hard socket)

VP25 vinyl chloride pipe

(Locally procured)

Attached hose

band

Attached flexible hose

Soft socket

Hard socket

Socket for VP25

(Locally procured)

nit

ain

Hose band

tightening

allowance

5 mm or less

10 - 12 mm

Heat insulating

material

Flexible hose

(Accessory)

Hard polyvinyl

chloride pipe

socket for VP25

(Locally procured)

Hard polyvinyl

chloride pipe VP25

(Locally procured)

10 mm

Drain pipe

connecting port

(Colour:

transparent)

ing

r le

Underside of ceiling

Indoor unit

300 mm or less

mm or

• After the electric work has finished, pour water

during COOL mode operation.

• If the electric work has not yet finished, pull out the

float switch connector (CN34: Red) from the
electrical control box, and check draining by plugging
the single phase 208 to 240 V power to the terminal
blocks (L) and (N).
If doing so, the drain pump motor operates.
(Never apply 208 to 240 V to (Uv (U1)), (Uv (U2)),
(A), (B)

otherwise a trouble of P.C. board occurs.)

• Test water drain while checking the operation sound

of the drain pump motor.
(If the operation sound changes from continuous
sound to intermittent sound, water is normally
drained.)
After the check, the drain pump motor runs,
connecting the float switch connector.
(In case of check by pulling out the float switch
connector, be sure to return the connector to the
original position.)



Perform heat insulating

• As shown in the figure, cover the flexible hose and

hose band with the attached heat insulator up to the
bottom of the indoor unit without gap.

• Cover the drain pipe seamlessly with a heat insulator

to be procured locally so that it overlaps with the
attached heat insulator of the drain connecting
section.

• Direct the slits and seams of the heat insulator

upward to avoid water leakage.

Power supply wiring

Insert the hose end between the heat

exchanger and drain pan and bend it

downwards.