En-9
5. INSTALLING DRAIN PIPES
• Install the drain pipe with downward gradient (1/100 to 1/50)
and so there are no rises or traps in the pipe. Unsmooth
draining caused by accumulated water
fl
ow in the pipe may
cause clogged drain.
• Use general hard polyvinyl chloride pipe (VP25) [outside
diameter 32 mm].
• When the pipe is long, install supporters.
• Do not perform air bleeding. Drainage may be blown out.
• Always heat insulate the indoor side of the drain pipe.
• If it is impossible to have suf
fi
cient gradient of pipe, perform
drain lift-up.
Pipe size
Drain pipe
VP25 (O.D. 32 mm)
Hanging
fi
ttings
1.5 to 2 m
VP25 (O.D. 32 mm)
Downward gradient 1/100 to 1/50
Rise
PROHIBITED:
Trap
Air bleeding
When lifting up drain:
• Height of inclined pipe should be less than 850 mm from the
ceiling. A rise dimension over this range will cause leakage.
• Lift up the pipe vertically at the position of 300 mm or less from
the unit.
300 mm or less
VP25 (O.D. 32 mm)
local arrangement
850 mm or less
Horizontal or
upward gradient
Downward gradient
1/100 to 1/50
VP30 (O.D. 38 mm) or more
Downward gradient 1/100 to 1/50
850 mm or less
WARNING
• Do not insert the drain piping into the sewer where sulfurous
gas occurs. (Heat exchange erosion may occur)
• Insulate the parts properly so that water will not drip from the
connection parts.
• Check for proper drainage after the construction by using the
visible portion of transparent drain port and the drain piping
fi
nal outlet on the body.
CAUTION
• Do not apply adhesive agent on the drain port of the body.
(Use the attached drain hose and connect the drain piping)
Working procedure
(1) Install the attached drain hose to the drain port of the body.
Install the hose band from the top of the hose within the
graphic display area. Secure
fi
rmly with the hose band.
(2) Use vinyl adhesive agent to glue the drain piping (PVC pipe
VP25) which is prepared on site or elbow socket.
(Apply color adhesive agent evenly until the gauge line and
seal)
(3) Check the drainage. (See separate diagram)
(4) Install the heat insulation.
(5) Use the attached heat insulation to insulate the drain port
and band parts of the body.
Install the knob
faces upward
(Accessories)
Attached drain hose
heat insulation
(Accessories)
Locally
arranged
vinyl pipe
Attached
drain hose
(Accessories)
Attached
hose band
Attached heat
insulation
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8/31/2012 2:42:12 PM
8/31/2012 2:42:12 PM