Drain Piping Work - Toshiba RAS-M10GDCV-E Installation Manual

5

DRAIN PIPING WORK

Piping material
• For laying pipes under ground, 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 force
is not applied to connection sections of pipe and pipe
is not waved with connected pipes.
NOTES :
• Do not make slack or trap at halfway of pipes.
• Set pipes so that the end of drain pipe is not dipped in
water, and also keep space with 50mm or more to the
ground.
• After piping work, check 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.
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 elbow thermal insulation cover.
Insert the hose completely
up to the end.
Drain hose
Elbow thermal
insulation cover
Larger as possible (Approx. 100mm)
25
Be sure to apply
thermal insulation.
Indoor
unit
Thermal
insulator
• 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.
Shield pipe (local parts)
Drain hose Inside the room
25
30 or more
Downward grading
1/100 or more
Drain kit (Option)
For drain-up kit installation.
Refer the installation manual supplied with the drain-
up kit.
12
1.5m to 2m
Support
bracket
1/100 or more
downward grading
Over thread
Trap
50 mm
or more
Do not put the drain hose end
into water or drainage ditch.
Extension drain hose
25
Extended
ventilating pipe