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5
Drain piping
CAUTION
Following the Installation Manual, perform the drain piping work so that water is properly drained.
Apply a heat insulation so as not to cause a dew condensation.
Inappropriate piping work may result in water leakage in the room and wet furniture.
Provide the indoor drain piping with proper insulation.
Provide the area where the pipe connects to the indoor unit with proper insulation. Improper insulation will cause
condensation to form.
The drain pipe must be sloping downward (at an angle of 1/100 or more), and do not run the pipe up and down
(arched shape) or allow it to form traps. Doing so may cause abnormal sounds.
Restrict the length of the traversing drain pipe to 65'7" (20 m) or less. For a long pipe, provide support
brackets at intervals of 4'11" to 6'7" (1.5 to 2 m) to prevent flapping.
Install the collective piping as shown in the following fi gure.
Do not provide any air vents. Otherwise, the drain water will spout, causing water to leak.
Do not allow any force to be applied to the connection area with the drain pipe.
A hard PVC pipe cannot be connected to the drain pipe connecting port of the indoor unit. Be absolutely sure to
use the fl exible hose provided for the connections with the drain pipe connecting port.
Adhesive agents cannot be used for the drain pipe connecting port (hard socket) of the indoor unit. Be absolutely
sure to secure the pipe using the hose bands provided. Use of an adhesive agent may damage the drain pipe
connecting port or cause water to leak.
4'11" to 6'7" (1.5 to 2 m)
Support
bracket
(Collective
piping)
Insulation
Downward slope
1/100 or more
Drain pipe
connecting port
Attached drain hose
(hard socket)
Attached
hose band
Attached hose band
Soft
Soft
VP 20 Polyvinyl
Adhesive
socket
socket
chloride pipe
agent
(locally procured)
prohibited
Pipe material, size and insulation
The following materials for piping work and insulation process are procured locally.
Pipe material
Hard vinyl chloride pipe VP20 (Outer diameter 1.1" (27 mm))
Insulation
Foamed polyethylene foam, thickness: 0.4" (10 mm) or more
23-EN
As long as possible
(Approx. 3.9" (10 cm))
Arched shape
Trap
Downward slope
1/100 or more
VP30
Incorrect
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Insert the attached drain hose into the drain pipe connecting port on the drain pan up to the end.
Fit the attached hose band to the end of the pipe connecting port, and then tighten it securely.
REQUIREMENT
Fix the drain hose with the attached hose band, and set the
tightening position upward.
As the draining is the natural water draining, arrange the pipe
outside of the unit on the down slope.
If piping is performed as shown in the fi gure, drain cannot be
discharged.
Fit the attached hose band to the end of the
hose, lay down the knob, and then tighten hose
band.
Drain pan
0.4" (10 mm)
to 0.6" (15 mm)
Confi rm that soft hose is pushed in up to the end of the drain pan.
Connecting drain pipe
Connect the hard vinyl chloride pipe (locally procured) to the mounted drain hose which
was attached. When Plug is detached, the drain pipe is not damaged. It causes the water
leak.
In case of taking pipe from the left side
In case of taking pipe from the left side, exchange the plug from left to right.
Push in the plug of which end is not sharp up to the end.
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 23.6" (600 mm) or less from the underside of the indoor unit.
When Drain Pump Kit (sold separately) is installed, drain pipe and refrigerant pipe can only be connected from
upper direction.
Insulation process
Using the attached drain hose insulation, lap the connecting section and the drain hose without clearance,
and then tighten with two handing band so that insulation does not open.
Covering the attached drain hose insulation, lap the insulation (locally procured) to the drain pipe without clearance.
Lap covering connecting section
between drain pan and drain hose.
Drain hose
Drain
pan
Banding band
Hose band
Attached insulation
* Fasten the binding bands in such a manner as to not
squeeze the attached insulation material excessively.
– 12 –
s
e
NO GOOD
Drain pipe
Fit the attached hose band to the end
of the hose, with both of the two knobs
oriented sideways.
0.4" (10 mm)
to 0.6" (15 mm)
Attached drain hose
Drain pipe
Insulation
(locally procured)
Lap the attached
insulation so that
the one end is put
on the other end
at the upper side.
* Tighten the banding band so that attached
Hose band
insulation is not pushed excessively.
Refrigerant pipe
Drain pipe
Drain pan
Plug
EN
FR
ES
24-EN
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