Panasonic U-26PE1U6 Technical Data & Service Manual page 159

6-38. Installing the Drain Pipe
1. Before Performing the Installation Drain Piping
(1) Limitations of Raising the Drain Pipe Connection
CAUTION
The drain pipe can be raised to a maximum height of
2.79 ft. (850 mm) from the bottom surface of the ceiling.
Do not attempt to raise it higher than 2.79 ft. (850 mm).
Doing so will result in water leakage. (Fig. 1-124)
(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. (Fig. 1-125)
Do not install an air bleeder as this may cause water to spray
from the drain pipe outlet. (Fig. 1-125)
Do not provide U-trap or bell-shaped trap in the middle of the
drain pipe. Doing so will cause abnormal sound.
(Fig. 1-125)
Make sure the drain pipe has a downward gradient (1/100 or
more; downward from drain port connection).
(Fig. 1-126)
(3) Limitations of Drain Hose Connection
CAUTION
Do not bend the supplied drain hose 90° or more.
Bend it less than 45°. (Fig. 1-127)
Do not make a trap in the middle of the supplied drain hose.
Doing so will cause abnormal sound. (Fig. 1-128)
1 ft. (300 mm) or less
(as short as possible)
Indoor unit
Ceiling surface
* Length of supplied drain pipe = 9-27/32" (250 mm)
Trap prohibited
Separation of support bracket = 4.92 ft. (1.5 m) ~ 6.56 ft. (2 m)
Indoor unit
Downward gradient = 1/100 or more
Bend angle 90° prohibited
1-151
1. Specifications
A : 2.79 ft. (850 mm) or lower
B : 2.2 ft. (670 mm) or lower
Fig. 1-124
Air bleeder prohibited
Upward gradient
prohibited
Indoor unit
Fig. 1-125
Fig. 1-126
Bend angle less than 45°
Fig. 1-127
Trap prohibited
Fig. 1-128
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