Installing The Drain Piping - Panasonic S-12MU1U6 Installation Instructions Manual

3-11. Installing the Drain Piping

(1) Prepare standard hard PVC pipe (O.D. 1-1/32") for the
drain and use the supplied hose band to prevent water
leaks. (Fig. 3-33)
The PVC pipe must be purchased separately.
The transparent drain part on the unit allows you to
check drainage.
(2) Installing the drain hose
●
To install the drain hose, fi rst place 1 of the 2 hose bands
over the unit drain port and the other hose band over the
hard PVC pipe (not supplied). Then connect both ends of the
supplied drain hose. (Fig. 3-33)
● On the unit drain side, grasp the hose band with pliers and
insert the drain hose all the way to the base.
●
If other commercially available hose bands are used, the
drain hose may become pinched or wrinkled and there is
danger of water leakage. Therefore be sure to use the
supplied hose bands. When sliding the hose bands, be
careful to avoid scratching the drain hose.
●
Do not use adhesive when connecting the supplied drain
hose to the drain port (either on the main unit or the PVC
pipe).
Reasons: 1. It may cause water to leak from the
connection. Since the connection is slippery
just after the adhesive has been applied, the
pipe easily slips off.
2. The pipe cannot be removed when
maintenance is needed.
●
Wrap the hose with the supplied drain hose insulation and
use the 4 twist ties so that the hose is insulated with no gaps.
●
Do not bend the supplied drain hose 90° or more. The hose
may slip off.
NOTE
Make sure the drain pipe has a downward gradient (1/100 or
more) and that there are no water traps.
CAUTION
●
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 2.78 ft. above the bottom surface of
the ceiling. Under no conditions attempt to raise it
higher than 2.78 ft. above the bottom surface of the
ceiling. Doing so will result in water leakage. (Fig. 3-34)
●
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. 3-35)
●
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. 3-36)
●
Provide insulation for any pipes that are run indoors.
VRF_Indoor_US.indb 18 VRF_Indoor_US.indb 18
Twist tie
(4 ties, supplied)
Drain hose
insulation
Drain port
(supplied)
13/64"
13/64"
63/64" 63/64"
5-33/64"
Unit
●
Attach so that the hose band
CAUTION fastener is on the side of the
drain port.
●
Attach the hose bands so that
each is approximately 13/64" to
63/64" from the end of the
supplied drain hose.
Air bleeder prohibited
●
Do not install an air bleeder as
this may cause water to spray
CAUTION
from the drain pipe outlet.
* Length of supplied drain hose = 5-33/64"
18
Hard PVC pipe
Position to
(equivalent to
fasten hose
O.D. 1-1/32")
bands
(Field supply)
Drain hose
(supplied)
Hose band
(2 bands, supplied)
Fig. 3-33
1 ft. or less
2.78 ft. or less
Fig. 3-34
Upward gradient prohibited
Fig. 3-35
Support
bracket
Fig. 3-36
2011/09/30 12:22:58 2011/09/30 12:22:58