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8. INSTALLING DRAIN PIPES
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)
8.1A. When drain pump is used
• Use general hard polyvinyl chloride pipe ø 3/4 in. (19 mm)
[I.D.], ø 1-1/16 in. (27 mm) [O.D.].
• Do not perform a rise, trap and air bleeding.
• Provide a downward gradient (1/100 or more).
• Provide supporters when long pipes are installed.
• Use an insulation material as needed, to prevent the pipes
from freezing.
• Install the pipes in a way that allows for the removal of the
control box.
Gap of 5 to 6ft (1.5 to 2 m)
27-9/16 in. (700
mm) or less
Horizontal or
upward gradient
Supporter
Max. 11-13/16 in.
(300 mm)
Locally arranged pipe
GOOD
[O.D.1-1/16 in.
(27 mm)] or more
Rise
Air bleeding
PROHIBITED
Trap
Observe the following procedures to construct centralized
drain pipe
fi
ttings.
[O.D.1-5/16 in. (33 mm)] or more
Downward gradient 1/100 or more
27-9/16 in.
(700 mm) or less
8.1B. When drain pump is not used (Natural
drainage)
CAUTION
Set “Drainage function setting (JM1)” in “10.4. Jumper wire set-
ting.”
Drain pump cannot be used if it is installed in wall mounted type/
fl
oor standing concealed type.
If the drain pump is not used, please replace with the drain
cap.
Wall mounted type /
Floor standing concealed type
Ceiling concealed type
• Use general hard polyvinyl chloride pipe ø 3/4 in. (19 mm)
[I.D.], ø 1-1/16 in.(27 mm) [O.D.] .
• Do not perform a rise, trap and air bleeding.
• Provide a downward gradient (1/100 or more).
• Provide supporters when long pipes are installed.
• Use an insulation material as needed, to prevent the pipes
from freezing.
• Install the pipes in a way that allows for the removal of the
control box.
(1) Ceiling concealed type
Gap of 5 to 6ft (1.5 to 2 m)
3-15/16 in. (100 mm) or more
Downward gradient
0.10-0.19 in.
(2.5-5.0 mm)
Supporter
Locally arranged pipe
GOOD
[O.D.1-1/16 in.
(27 mm)] or more
Air bleeding
Rise
PROHIBITED
Trap
Observe the following procedures to construct centralized
drain pipe
fi
ttings.
[O.D.1-5/16 in.
(33 mm)] or more
Downward gradient
1/100 or more
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2015/6/25 10:27:11
2015/6/25 10:27:11