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ENGLISH
3-3. Installing the Drain Pipe
Prepare standard hard PVC pipe (I.D. 20 mm) for the drain.
The PVC pipe must be purchased separately.
Fig. 3-8
Make sure the drain pipe has a downward gradient (1/100 or
more) and that there are no water traps.
●
Do not install an air bleeder as this may cause water to
spray from the drain pipe outlet. (Fig. 3-9)
Prohibited
Air bleeder
Fig. 3-9
●
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 500 mm. Do not raise it any higher than
500 mm, as this could result in water leaks. (Fig. 3-10)
300 mm or less
500 mm or less
Good
Fig. 3-10
●
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. 3-11)
Upward gradient
Prohibited
Fig. 3-11
●
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. 3-12)
Support pieces
Fig. 3-12
3-4. 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.
●
Pour a glass of water into the drain plate.
●
Ensure that water flows out from drain hose of the indoor unit.
Fig. 3-13
Indoor unit
Drain hole
Drain insulator(supplied)
Drain hose
(supplied)
Hard PVC pipe
(not supplied)
Thermal insulator
(not supplied)
80cm
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