Checking The Drainage - Panasonic S-12MU1U6 Installation Instructions Manual

CAUTION
●
Do not install an air bleeder as this may cause water to
spray from the drain pipe outlet. (Fig. 3-64)
●
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 33-15/32" above the bottom
surface of the ceiling. Under no conditions attempt to
raise it higher than 33-15/32" above the bottom surface
of the ceiling. Doing so will result in water leakage.
(Fig. 3-65)
●
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
fl ow backward and leak when the unit is not operating.
(Fig. 3-66)
●
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. 3-67)
●
Provide insulation for any pipes that are run indoors.
Refer to "■ SUPPLEMENT ON DRAIN PIPING".

3-17. 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 (R, S
terminals) inside the electrical component box.
(2) Slowly pour approx. 0.2 gal of water into the drain pan
using a siphon pump through the air outlet grille.
(Fig. 3-68)
(3) Short the check pin (CHK) on the indoor control board
and operate the drain pump. Check the water fl ow through
the transparent drain pipe and see if there is any leakage.
CAUTION
(4) When the drainage check is complete, open the check pin
(CHK) and remount the insulator.
CAUTION
VRF_Indoor_US.indb 25 VRF_Indoor_US.indb 25
Be careful since the fan will start
when you short the pin on the
indoor control board.
The bottom drain port is for use
only during test runs and servicing
inspections. Do not connect the
drain pipe to the bottom drain port.
Fig. 3-64
0 – 45°
* Length of supplied drain hose = 9-27/32"
Fig. 3-65
Fig. 3-66
Fig. 3-67
Drainage check
water (approx. 0.2 gal)
Fig. 3-68
25
Air bleed valve
11-13/16" or less
33-15/32" or less
Upward gradient prohibited
Support
bracket
Drain tube
connection
(transparent)
Discharge port
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