Installing The Drain Piping; Checking The Drainage - Technibel CAV254R5TAA Installation Manual

3-4. Installing the Drain Piping

(1) Prepare a standard hard (PVC) pipe for the drain and
use the accessory drain hose and hose band to prevent
water leaks.
The PVC pipe must be purchase separately.
The transparent part allows you to check drainage.
(Fig. 3-6).
CAUTION
• Tighten the hose clamps so their locking nuts face
upward (Fig. 3-6).
(2) After checking the drainage, wrap the supplied packing
and drain pipe insulator around the pipe. (Fig. 3-7.)
NOTE
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 tube outlet. (Fig. 3-8)
• If it is neccesary to increase the height of the drain
pipe somewhat, the portion 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. 3-9)
• Do not install pipe with an upward gradient from the
connection port. It will cause the drain water to flow
backwards and leak when the unit is stopped.
(Fig. 3-10)
• 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. 3-11)
• Be sure to provide insulation for any drain piping
installed indoors.

3-5. Checking the Drainage

After wiring and 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.
WARNING
(1) Remove the tube cover and through the opening, slowly pour about 1,200 cc of water into the drain pan to check drainage.
(2) Do Test Run to check the drainage after completing installation. When performing Test Run, be sure to observe the Test Run
procedure.
CAUTION
(3) After drain checking is finished, return the Operation
Selector switch to the RUN position (ON position ) and
remount the tube cover.
CAUTION
• Do not supply power to the unit until the tubing and wiring to the outdoor unit are
completed.
• Be careful since the fan will
start when checking the drai-
nage.
• To mount the tube cover, use
4 x 8 tapping screws. Do not
use long screws as they may
puncture the drain pan and
cause water leakage.
Transparent part for
Hose band (supplied)
checking drainage
Packing (supplied)
Drain hose (supplied)
Drain insulator (supplied)
Air bleeder
30 cm or less (as short as possible)
50 cm or less
Upward gradient
Support
pieces
Fig. 3-12
6
Hard PVC pipe
pipe (not supplied)
Drain hose
adapter (supplied)
Fig. 3-6
Fig. 3-7
Fig. 3-8
Fig. 3-9
Fig. 3-10
Fig. 3-11
4 x 8 mm
tapping screw
Tube cover
EG