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3-5. Installing the Drain Pipe
3-5-1. Before Performing the Installation of Drain Piping
(1) Limitations of Raising the Drain Pipe Connection
CAUTION
●
The drain pipe can be raised to a maximum height of 850 mm from the bottom of the ceiling.
Do not attempt to raise it higher than 850 mm.
Doing so will result in water leakage.
* Length of supplied drain pipe = 250 mm
A
B
300 mm or less
Indoor unit
Bottom of the Ceiling board
A : 850 mm or lower
B : 666 mm or lower
(as short as possible)
(2) Limitations of Drain Pipe Connection
CAUTION
●
Do not install the drain pipe with an upward gradient from the drain port connection. This will
cause the drain water to flow backward and leak when the unit is not operating.
●
Do not install an air bleeder as this may cause water to spray from the drain pipe outlet.
●
Do not provide U-trap or bell-shaped trap in the middle of the drain pipe. Doing so will cause
abnormal sound.
Indoor unit
Air bleeder prohibited
Trap prohibited
Upward gradient prohibited
●
Make sure the drain pipe has a downward gradient (1/100 or more; downward from drain
port connection).
Indoor
unit
Separation of support bracket = 1.5 m ~ 2 m
Downward gradient = 1/100 or more
●
If there is a centralized drain pipe, be careful to the size of pipe.
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