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5
Drain piping
CAUTION
Following the Installation Manual, perform the drain
piping work so that water is properly drained, and
apply a heat insulation so as not to cause a dew
dropping.
Inappropriate piping work may result in water
leakage in the room and wet of furniture.
Piping / Heat insulating
material
Require the following materials for piping and heat
insulating at site.
Flexible hose
Use the attached flexible hose to adjust center
discrepancy of the hard vinyl chloride pipe or to adjust
the angle.
• Do not use the flexible hose as stretched, or do not
deform it more extent than that in the following figure.
• Be sure to fix the soft end of the flexible hose with the
attached hose band.
• Use the flexible hose on a horizontal level.
REQUIREMENT
• Be sure to perform heat insulation of the drain pipes of
the indoor unit.
• Never forget to perform heat insulation of the
connecting part with the indoor unit.
An incomplete heat insulation causes dew dropping.
• Set the drain pipe with downward slope (1/100 or
more), and do not make swelling or trap on the piping.
It may cause an abnormal sound.
• For length of the traversing drain pipe, restrict to 20 m
or less.
In case of a long pipe, provide support brackets with
interval of 1.5 to 2 m in order to prevent waving.
• Set the collective piping as shown in the below figure.
• 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.
Piping
Hard vinyl chloride pipe VP25
(Outer dia. : Ø32 mm)
Heat insulator
Foam polyethylene :
Thickness 10 mm or more
OK
NO GOOD
max
45°
max
45°
Riser (Trap)
90° Bend
Support
bracket
1/100 or more
downward
Heat insulator
1.5 m to 2 m
Arched
shape
Trap
NO
GOOD
VP25
As long as possible (10 cm)
Downward slope
1/100 or more
VP30 or more
VP25
VP25
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)
Ind
oor
uni
t
Drain pipe
connecting port
(Transparent)
Flexible hose
(Accessory)
Socket for VP25 vinyl
chloride pipe
(Locally procured)
VP25 vinyl chloride
pipe
(Locally procured)
Ind
oor
uni
t
5 mm or less
10 mm
hose band tightening
margin
Heat
insulator
10 to 12 mm
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.
Be sure to check draining also when installed in
heating period.
Using a pitcher or hose, pour water (1500 to 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.
• 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 220-240 V power to the terminal
blocks R(L)
and S(N).
If doing so, the drain pump motor operates.
(Never apply 220-240 V to
,
,
or
,
otherwise a trouble of P.C. board occurs.)
Ri
si
ng
up
661 mm or l
es
s
Underside of ceiling
Indoor unit
300 mm
or less
Ris
ing
u
p 85
0 m
m
or
le
ss
S
R
Heat
exchanger
Drain pan
Float switch
connector (3P)
(CN34: red)
Power
supply
wiring
Insert the hose end between the
heat exchanger and the drain pan,
and then bend the hose downward.
Tool for
pouring
water
Bottle
Water (1500 cc to 2000 cc)
A
B
71-EN
72-EN
+001114119501.book Page 36 Wednesday, October 17, 2012 8:23 PM
