Installing The Drain Pipe; Checking The Drainage - Panasonic S-22MF2E5 Installation Instructions Manual

3-3. 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. 3-8)
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. 3-8)
Align the wire of hose band without separating from the drain hose
and tighten so that it does not contact the bead.
Drainage check
section on drain port
(transparent)
Drain hose
(supplied)
Bead
(2) After connecting the drain pipe securely, wrap the supplied
packing and drain pipe insulator around the pipe, then
secure it with the vinyl clamps . (Fig. 3-9)
Drain insulator (supplied)
Vinyl clamps
(field supply)
NOT 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. 3-10)
Air bleeder
Prohibited
● 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. 3-11)
Hard PVC
Hard PVC pipe
socket
VP-25
VP-25
(not supplied)
(not supplied)
PVC
adhesive
Packing
(supplied)
Fig. 3-8
Fig. 3-9
Fig. 3-10
Good
● 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. 3-12)
Prohibited
● 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. 3-13)

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.
(1) Connect power to the power terminal board (R, S
terminals) inside the electrical component box.
(2) Remove the tube cover and slowly pour about 1,200 cc
of water through the opening into the drain pan to check
drainage.
(3) Short-circuit the check pin (CHK) on the indoor control
circuit board and operate the drain pump. Check the water
flow through the transparent drain port and see if there is
any leakage.
CAUTION
Be careful since the fan will start when you short the pin on
the indoor control board.
(4) When the drainage check is complete, open the check pin
(CHK) and remount the insulator and drain cap onto the
drain inspection port.
Water intake
9
300 mm or less
500 mm or less
Fig. 3-11
Upward gradient
Fig. 3-12
Support pieces
Fig. 3-13
Fig. 3-14