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44
4
U
38
S4359146
● Do not install an air
bleeder as this may
cause water to spray
from the drain pipe
outlet. (Fig. 3-81)
●
If it is necessary to increase the height of the
drain pipe, the section directly after the connec-
tion port can be raised a maximum of 19-11/16 in.
Do not raise it any higher than 19-11/16 in., as
this could result in water leaks.
(Fig. 3-82)
● 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. 3-83)
● 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. 3-84)
Fig. 3-81
CAUTION
3-25. 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 43 oz. 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 flow and see if there is any leakage.
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.
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 cause water leak-
age.
1593_U_I
Air bleeder
Not good
Fig. 3-82
Fig. 3-83
Fig. 3-84
1596_U_I
Good
Support pieces
1595_U_I
No good
Upward gradient
CAUTION
CAUTION
1979_U_I
Good
11-13/16 in. or less
19-11/16 in. or less