Drain pipe
– 12 –
Arched shape
Incorrect
Trap
1.5 m to 2 m
Support
bracket
Heat
insulator Downward slope
1/100 or more
As long as possible
(Approx. 10 cm)
(Collective
piping)
Downward slope
1/100 or more
VP30
Drain pan
Adhesive
agent
prohibited
Soft
socket
Attached drain hose
Attached hose band
Soft
socket
VP 20 Polyvinyl
chloride pipe
(locally procured)
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 heat insulation.
• Provide the area where the pipe connects to the indoor unit with proper heat insulation. Improper heat 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 20 meters or less. For a long pipe, provide support brackets at
intervals of 1.5 to 2 meters to prevent
fl
apping.
• 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.
Drain pipe
connecting port
(hard socket)
■
Pipe material, size and insulator
The following materials for piping work and insulating process are procured locally.
Pipe material
Hard vinyl chloride pipe VP20 (Nominal outer diameter Ø26 mm)
Insulator
Foamed polyethylene foam, thickness: 10 mm or more
Attached
hose band
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.
Drain pan
Plug
Drain pipe
Refrigerant pipe
Fit the attached hose band to the end of the
hose, lay down the knob, and then tighten hose
band.
Drain pan
10 to 15 mm
10 to 15 mm
Attached drain hose
Con
fi
rm that soft hose is pushed in up to the end of the drain pan.
Fit the attached hose band to the end
of the hose, with both of the two knobs
oriented sideways.
■
Connection of drain hose
• 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.
■
Connecting drain pipe
NO GOOD
Drain pipe
Connect the hard vinyl chloride pipe (locally procured) to the mounted drain hose which
was attached.
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 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.
