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In cases where it is necessary to raise the height of the
drain piping, the drain piping can be raised to a maximum
height of 2.78 ft. (850 mm) above the bottom surface of
the ceiling. Under no conditions attempt to raise it higher
than 2.78 ft. (850 mm) above the bottom surface of the
ceiling. Doing so will result in water leakage. (Fig. 6-7)
Do not use natural drainage.
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. 6-8)
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. 6-9)
Provide insulation for any pipes that are run indoors.
Drain port
Twist tie
(4 vinyl ties, supplied)
Hard PVC pipe
Position to
Drain hose
(supplied)
Hose band
(2 bands, supplied)
3/16"
(5
mm
)
3/16"
(5
mm
)
15/16"
(25
mm
)
15/16"
(25
mm
)
5-1/2"(140
mm
)
Drain hose
(locally purchased)
bands
(supplied)
O.D. 1-1/32" (26mm))
fasten hose
insulation
(equivalent to
Unit
Fig. 6-5
Air bleeder prohibited
Fig. 6-6
Fig. 6-8
Support
bracket
Fig. 6-9
Uphill slope
3-4. Installing the Drain Piping
(1) Prepare standard hard PVC pipe (locally purchased O.D.
1-1/32" (26 mm)) for the drain and use the supplied hose
band to prevent water leaks. (Fig. 6-5)
(2) To install the drain hose, first place 1 of the 2 hose bands
over the unit drain port and the other hose band over the
hard PVC pipe (not supplied). Then connect both ends of
the supplied drain hose. (Fig. 6-5)
(3) On the unit drain side, grasp the hose band with pliers
and insert the drain hose all the way to the base.
If other commercially available hose bands are used, the
drain hose may become pinched or wrinkled and there is
danger of water leakage. Therefore be sure to use the
supplied hose bands. When sliding the hose bands, be
careful to avoid scratching the drain hose.
Do not use adhesive when connecting the supplied drain
hose to the drain port (either on the main unit or the PVC
pipe).
Reasons: a) It may cause water to leak from the connec-
tion. Since the connection is slippery just
after the adhesive has been applied, the
pipe easily slips off.
b) The pipe cannot be removed when mainte-
nance is needed.
(4) Wrap the hose with the supplied drain hose insulation
and use the 4 twist ties so that the hose is insulated with
no gaps.
Do not bend the supplied drain hose 90° or more. The
hose may slip off.
Make sure the drain pipe has a downward gradient (1/100 or
more) and that there are no water traps.
NOTE
Fig. 6-7
1 ft.(300
mm
) or less
0 - 45
2.78 ft.(850
mm
) or less
* Length of supplied drain hose = 5-1/2"(140
mm
)
CAUTION
Attach so that the hose band
fastener is on the side of the
drain port.
Attach the hose bands so that
each is approximately 3/16"
(5 mm) to 15/16" (25 mm) from
the end of the supplied drain
hose.
CAUTION
Do not install an air bleeder as
this may cause water to spray
from the drain pipe outlet.
(Fig. 6-6)
CAUTION