Installing The Drain Piping - Panasonic S-22ML1E5 Installation Instructions Manual

(4) The indoor unit should be suspended from the suspension
bolts (Fig. 3-7) so that the distance between the bottom of
the suspension lug and the bottom surface of the ceiling is
17 to 22 mm. (Fig. 3-6) Clearance between the indoor unit
and the bottom surface of the ceiling is adjustable after the
ceiling panel is attached to the unit.
Suspension
bracket
17 – 22 mm
Nuts and washers
(Used above and below.)
Double nuts
15 mm or more
Use gauges A and B to adjust the height of the indoor unit.
(Gauges shown in Table 1-2.)
(5) The unit should be adjusted using water level or as shown
in Fig. 3-8 so that the drain pipe side is slanted 5 mm lower
than the opposite side.
Drain pipe side
Vinyl hose
(6) After completing the adjustment of the clearance, fasten all
upper and lower suspension nuts tightly.

3-4. Installing the Drain Piping

(1) Prepare standard hard PVC pipe (O.D. 32 mm) for the
drain and use the supplied drain hose and hose band to
prevent water leaks. The PVC pipe must be purchased
separately. The unit's transparent drain port allows you to
check drainage. (Fig. 3-9)
Align the hose band with end of the
hose, and tighten so that it does
not contact the bead.
Drainage check
section on drain
Drain hose
port (transparent)
(supplied)
Bead
Full-scale installation diagram
(printed on the package)
15 mm or more
Suspension bolt
Notch
17 – 22 mm
Poured water
0 to 5 mm
Hard PVC
Hard PVC pipe
socket
O.D. 32 mm
I.D. 32 mm
(not supplied)
(not supplied)
PVC adhesive
Packing (supplied)
CAUTION
● Do not use adhesive at the drain connection port on the
indoor unit.
● Insert the drain pipe until it contacts the socket, as shown in
Fig. 3-9, then secure it tightly with the hose band.
● Tighten the hose clamps so their locking nuts face upward.
(Fig. 3-9)
● Do not use the supplied drain hose bent at a 90° angle.
(The maximum permissible bend is 45°.)
(2) After checking the drainage, wrap the supplied packing
and drain pipe insulator around the pipe, then secure it
with the clamps. (Fig. 3-10)
Fig. 3-6
N OT E
Make sure the drain pipe has a downward gradient (1/100 or
more) and that there are no water traps.
CAUTION
Fig. 3-7
● Do not install an air bleeder as this may cause water to spray
from the drain pipe outlet. (Fig. 3-11)
● If it is necessary to increase the height of the drain pipe, the
pipe can be raised a maximum of 590 mm from the bottom
of the ceiling. Do not raise it any higher than 590 mm, as this
could result in water leaks. (Fig. 3-12)
Fig. 3-8
● 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. 3-13)
● 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. 3-14)
Fig. 3-9
● Provide insulation for any pipes that are run indoors.
9
Drain insulator (supplied)
Vinyl clamps
(field supply)
Air bleeder prohibited
300 mm or less
(as short as possible)
590 mm or less
Upward gradient prohibited
Support
pieces
Fig. 3-10
Fig. 3-11
Fig. 3-12
Fig. 3-13
Fig. 3-14