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28
3-20. Installing the Drain Pipe
(1) Prepare standard hard PVC pipe (O.D. 32 mm) for the
drain and use the supplied hose band to prevent water
leaks.
The PVC pipe must be purchased separately.
The transparent drain part on the unit allows you to check
drainage. (Fig. 3-63)
CAUTION
●
Do not use adhesive tape at the drain connection port on
the indoor unit.
●
Insert the drain pipe until it contacts the socket, and then
secure it tightly with the hose band.
●
Do not use the supplied drain hose bent at a 90° angle.
(The maximum permissible bend is 45°.)
●
Tighten the hose clamps so their locking nuts face
upward. (Fig. 3-63)
Align the hose band with end of the hose, and
tighten so that it does not contact the bead.
Drainage check
section on drain port
(transparent)
Drain hose
(supplied)
Hard PVC
socket
VP-25 (not
supplied)
Hard PVC
pipe VP-25
(not supplied)
Bead
Packing
(supplied)
PVC
adhesive
Fig. 3-63
(2) After connecting the drain pipe securely, wrap the supplied
packing and drain pipe insulator around the pipe, then
secure it with the supplied vinyl clamps. (Fig. 3-64)
Drain insulator (supplied)
Vinyl clamps
Fig. 3-64
N OT E
Make sure the drain pipe has a downward gradient (1/100 or
more) and that there are no water traps.
CAUTION
●
Do not install an air bleeder as this may cause water to
spray from the drain pipe outlet. (Fig. 3-65-1)
Prohibited
Air bleeder
Fig. 3-65-1
●
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 50 cm. Do not raise it any higher than 50 cm,
as this could result in water leaks. (Fig. 3-65-2)
30 cm or less
50 cm or less
Good
Fig. 3-65-2
●
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. 3-65-3)
Upward gradient
Prohibited
Fig. 3-65-3
●
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. 3-65-4)
Support pieces
Fig. 3-65-4
NOTE
Refer to the Section “
■
SUPPLEMENT ON DRAIN PIPING”.
Airwell̲PAC-i̲eng.indb 28
Airwell̲PAC-i̲eng.indb 28
2009/07/09 16:13:26
2009/07/09 16:13:26
Содержание OU-PSINV-25HR
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