Panasonic S-71WF3E, Service Manual

Page: 104 / 313

104
12.1.3.4 Installing the Drain Pipe
(1) Prepare standard hard PVC pipe (O.D. 26 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.
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.
(2) Installing the drain hose

First insert the drain hose (supplied) to the
hose band (supplied) and then install the drain
hose to the unit drain port.

Insert until the drain hose bumps to the end.

Hose band screw torque is 30 - 35 N ꞏ cm.

Connect both the drain hose and PVC pipe
(VP20 or similar material, not supplied). Insert
until the PVC pipe bumps to the end and
adhere with PVC adhesive.
Unit drain port
Hose band (supplied)
Drain hose (supplied)
Do not use adhesive.
Adhere with PVC adhesive.
Hard PVC pipe
(VP20 not supplied)
(3) After connecting the drain pipe securely, wrap the
supplied packing and drain pipe insulator around
the pipe, then secure it with the clampers.
Packing (supplied)
Drain insulator (supplied)
130
26 26
Drain insulator (supplied)
Hose band (supplied)
Drain insulator (supplied)
Clampers (supplied)
12.1.3.4.1 Horizontal Installation
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.
Prohibited
Air bleeder

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.
300 mm or less
500 mm or less
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.
Upward gradient
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.
Support pieces