18
3-4-1. Horizontal Installation
N OT E
Make sure the drain pipe has a downward gradient (1/100 or more) and that there are no water
traps.
CAUTION
●
Do not install an air bleeder as this may cause water to spray from the drain pipe
outlet.
Prohibited
Air bleeder
●
If it is necessary to increase the height of the drain pipe, the section directly after the
connection port can be raised a maximum of 500 mm. Do not raise it any higher than
500 mm, as this could result in water leaks.
300 mm or less
500 mm or less
Good
●
Do not install the pipe with an upward gradient from the connection port. This will cause the
drain water to flow backward and leak when the unit is not operating.
Upward gradient
Prohibited
●
Do not apply force to the piping on the unit side when connecting the drain pipe. The pipe
should not be allowed to hang unsupported from its connection to the unit. Fasten the pipe to
a wall, frame, or other support as close to the unit as possible.
Support pieces
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