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• For length of the traversing drain pipe, restrict to
65'7" (20 m) or less.
In case of a long pipe, provide support brackets with
interval of 4'9" to 6'7" (1.5 to 2 m) in order to prevent
waving.
Arched
shape
NO
GOOD
Trap
• Set the collective piping as shown in the below figure.
As long as possible (3.9" (100 mm))
VR25
VR25
VR25
VP30 or more
Downward slope
1/100 or more
• Be sure not to apply force to the connecting part of
the drain pipe.
• The hard vinyl-chloride pipe cannot be directly
connected to the drain pipe connecting port of the
indoor unit.
For connection with the drain pipe connecting port, be
sure to use / fix the attached flexible hose with the
hose band, otherwise a damage or water leak is
caused on the drain pipe connecting port.
Attached hose
VP25 vinyl chloride pipe
Drain pipe
band
(Locally procured)
connecting port
(Hard socket)
Attached flexible hose
Socket for VP25
Soft socket
(Locally procured)
Hard socket
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.
0.2" (5 mm) or less
0.4" to 0.47" (10 to 12 mm)
hose band tightening
margin
Drain pipe
connecting port
(Transparent)
VP25 vinyl chloride
pipe
(Locally procured)
0.4" (10 mm)
Socket for VP25 vinyl
Flexible hose
Heat
chloride pipe
(Accessory)
insulator
(Locally procured)
23-EN
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 drain
pipe, drain-up piping is possible.
• The height of the drain pipe must be 33.5" (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 11.8" (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.
11.8" (300 mm)
or less
Indoor unit
Underside of ceiling
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 (1.5L to 2L (1/3 to
0.5 gallon)) 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.
Heat
exchanger
Float switch
connector (3P)
(CN34: red)
Drain pan
S
Tool for
pouring
Insert the hose end between the heat
water
exchanger and the drain pan, and then
bend the hose downward.
Bottle
Water (1.5L to 2L (1/3 to 0.5 gallon))
• 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 208/230V power to the terminal
blocks (L1) and (L2).
If doing so, the drain pump motor operates.
(Never apply 208/230V to(
,
)
otherwise a trouble of P.C. board occurs.)
� 12 �
• 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.)
Single phase
208/230V~60Hz
Power
terminals
(L1) (L2)
CN34
(RED)
Red
Black
Pull out connector CN34 (Red)
from P.C. board.
Black
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
Power supply
wiring
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
Heat insulator of the
drain connecting
(Locally procured)
section (Accessory)
R
* Direct the slits and seams of the heat insulator
upward to avoid water leakage.
White
EN
24-EN
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