En-7
3.4. Drain installation
3.4.1. Installing drain pipes
WARNING
• Do not insert the drain piping into the sewer where sulfurous gas occurs. (Heat ex-
change 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 trans-
parent 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)
■
When drain pump is used
• Use general hard polyvinyl chloride pipe (VP25) [outside diameter 32 mm].
• 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 1.5 to 2 m
700 mm or
less
Horizontal or
upward gradient
Supporter
Max. 300 mm
Locally arranged pipe
GOOD
VP25 [O.D
32 mm or more]
Rise
Air bleeding
PROHIBITED
Trap
Observe the following procedures to construct centralized drain pipe
fi
ttings.
VP30 or more [O.D 38 mm or more]
Downward gradient 1/100 or more
700 mm or less
■
When drain pump is not used (natural drainage)
CAUTION
Set “Drainage function setting (DIP switch 101-1)” in “5.3. DIP switch 101 setting”
If the drain pump is not used, please replace with the drain cap.
• Use general hard polyvinyl chloride pipe (VP25) [outside diameter 32 mm].
• Do not perform a rise, trap and air bleeding.
3.3.4. Fix the unit
(1) Hang the unit
Hanger bolt
Nut A
(Locally purchased)
Nut B
(Locally purchased)
Washer
(accessories)
Hanger
Hanger bolt
Nut A
(Locally purchased)
Washer
(accessories)
Nut B
(Locally purchased)
Unit
Hanger
20mm
length
Cover
* It might become dif
fi
cult to open and shut the Cover /control box cover when the length
exceeds 20mm.
(2) Leveling
Base horizontal direction leveling on top of the unit.
Ceiling
Level
OK
PROHIBITED
10 mm or less
Level
Air
OK
PROHIBITED
10 mm or less
CAUTION
• Leave a space of 100 mm or more between the inlet port and the ceiling.
• Fasten the unit securely with Special nuts A and B.
9374342532_IM.indb 7
9374342532_IM.indb 7
2018/12/11 10:11:33
2018/12/11 10:11:33
