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„ Connecting drain pipe
y Connect a hard socket (locally procured) to the hard
socket of the attached supplied flexible hose.
y Connect a drain pipe (locally procured) to the
connected hard socket.
REQUIREMENT
y Connect hard vinyl chloride pipes securely using
an adhesive for vinyl chloride to avoid water
leakage.
y 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 drain
pipe, drain-up piping is possible.
y The height of the drain pipe must be 500 mm or less
from the bottom of the ceiling.
y 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.
y Immediately after the pipe is bent up vertically, lay
the pipe making a down-gradient.
y Set downward grading immediately after raising up
vertically.
300 mm
or less
Indoor unit
Underside of ceiling
23-EN
„ 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.
Be sure to check draining also when installed in
heating period.
Using a pitcher or hose, pour water (1500 to 2000 cc)
into the suction 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.
Heat exchanger
Power
Drain pan
supply
wiring
Tool for
pouring water
Insert the hose end
between the heat
Float switch
Bottle
exchanger and
connector (3P)
the drain pan, and
(CN34: red)
then bend the hose
downward.
Water (1500 cc to 2000 cc)
y After the electric work has finished, pour water
during COOL mode operation.
y 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 240V power to the terminal
blocks (L) and (N).
If doing so, the drain pump motor operates.
(Never apply 208 to 240V to (Uv (U1)), (Uv (U2)),
(A), (B) otherwise a trouble of P.C. Board occurs.)
y 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.)
220 - 240V, 50 Hz
208 - 230V, 60 Hz
Power
terminals
R(L)
S(N)
CN34
(RED)
Red
Black
Pull out connector CN34 (Red)
from P.C. Board.
Black
„ Heat insulating
y 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.
y Cover the drain pipe seamlessly with a heat insulator
locally procured so that it overlaps with the attached
heat insulator of the drain connecting section.
Wrap the attached heat insulator seamlessly
from the surface of the indoor unit.
Heat insulator of the
Heat insulator
drain connecting
(Locally procured)
section (Accessory)
* Direct the slits and seams of the heat insulator
upward to avoid water leakage.
– 12 –
White
24-EN
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