MINI DUCT TYPE
Gap of 60 to 79 in. (1.5 to 2 m)
28 in. (700 mm)
or less
Horizontal or
upward gradient
Supporter
Max. 12 in. (300 mm)
Locally arranged pipe
GOOD
VP25 [O.D 2 in.
(32 mm)
or more]
RiseAir bleeding
Trap
PROHIBITED
VP30 or more [O.D 2 in. (38 mm) or more]
Downward gradient 1/100 or more
28 in. (700 mm)
or less
● Use general hard polyvinyl chloride pipe (VP25) [outside diameter 2 in. (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.
- (06 - 55) -
SYSTEM
DESIGN
SYSTEM
DESIGN
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