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1-96
1. Specifications
CAUTION
Do not install an air bleeder tube as this may cause
water to spray from the drain pipe outlet. (Fig. 1-76)
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 19-11/16".
Do not raise it any higher than 19-11/16", as this
could result in water leaks. (Fig. 1-77)
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. (Fig. 1-78)
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. (Fig. 1-79)
Refer to “ SUPPLEMENT ON DRAIN PIPING”.
6-25. Checking the Drainage
After wiring and drain piping are completed, use the
following procedure to check that the water will drain
smoothly. For this, prepare a bucket and wiping cloth to
catch and wipe up spilled water.
(1) Connect power to the power terminal board (L1, L2
terminal) inside the electrical component box.
(2) Remove the tube cover and through the opening,
slowly pour about 0.3 gal. of water into the drain pan
to check drainage.
(3) Short the check pin (CN5 white) on the indoor control
board and operate the drain pump. Check the water
CAUTION
Be careful since the fan will start
when you short the pin on the
indoor control board.
(4) When the check of drainage is complete, open the
check pin (CN5 white) and remount the insulator and
drain cap onto the drain inspection port.
CAUTION
To mount the tube cover, use 5/16"
(4 × 8 mm) tapping screws.
Do not use long screws as they
may puncture the drain pan and
Air bleeder
Not good
Fig. 1-76
Good
11-13/16" or less
19-11/16" or less
Fig. 1-77
No good
Upward gradient
Fig. 1-78
Good
Support pieces
Fig. 1-79
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