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DRAIN PIPING WORK
Piping material
• For laying pipes underground, use hard vinyl
chloride pipe. (Inner diam. 20 or 25mm)
Piping and cautions
• Set drain side of pipe at downward slope.
(1/100 or more)
• Be sure to apply thermal insulation (foaming
polyethylene, 10mm-thickness or more) for pipes
passing through the room.
• Adhere the connecting sections with vinyl chloride
agent surely so that no water leakage is caused.
• Support the piping with hanging bracket so that the
force is not applied to connection sections of pipe
and pipe is not waved.
NOTES :
• Do not make slack or trap at halfway across piping.
• Set pipes so that the end of drain pipe is not dipped in
water, and also keep space 50mm or more to the
ground.
• After piping work, check if water drains smoothly.
• Hole should be made at a slight downward slant to
the outdoor side.
• When connecting extension drain hose, insulate the
connecting part of extension drain hose with shield
pipe.
Trap
Arched shape
Support
bracket
1/100 or more
downward slope
Thermal
insulator
Indoor
unit
1.5m to 2m
50 mm
or more
Do not put the drain hose
end into water or drainage.
Shield pipe (local parts)
Extension drain hose
Inside the room
Drain hose
As long as possible (Approx. 100mm)
VP 30 or more
Downward grading
1/100 or more
VP 30VP 30VP 30
Extended
ventilating pipe
• As shown in the figure, set the collective piping such
as the ceiling duct so that waste water does not back
up from the main pipe.
Connection of the drain hose
• Insert the drain hose completely into the connecting port of the drain pan.
• Apply thermal insulation surely to the drain hose with socket thermal insulation seal.