Sanyo ECO R410A - Manual (Page 18)

18
3-13. 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.
The PVC pipe must be purchased separately. The
transparent drain part on the unit allows you to check
drainage.
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 the figure at right, 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 in
the horizontal direction.
● Make sure that the drain port is not a downward gra-
dient from the joint section (may lead to abnormal
noise).
NOTE
Make sure the drain pipe has a downward gradient
(1/100 or more) and that there are no water traps.
● 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 19-11/16". Do not raise it any
higher than 19-11/16", as this could result in water
leaks.
● 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.
● Do not apply force to the piping on the unit side when con-
necting 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.
3-14. Checking the Drainage
After wiring and drain piping are completed, use the follow-
ing 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 termi-
nals) inside the electrical component box.
(2) Remove the eyelet cap and through the opening, slowly
pour about 0.13gal of water into the drain pan to check
drainage.
(3) Short the check pin (CHK) on the indoor control board and
operate the drain pump. Check the water flow through the
transparent drain port and see if there is any leakage.
CAUTION
● Do not install an air bleeder as
this may cause water to spray
from the drain pipe outlet.
CAUTION
● Attach so that the hose
band fastener is on the side
of the drain port.
● Attach the hose bands so
that each is approximately
1/4" to 1" from the end of
the supplied drain hose.
5-33/64
1 1
13/64 13/64
Twist tie
(4 ties, supplied)
Drain port
Drain hose
insulation
(supplied)
Hard PVC pipe
(equivalent to
O.D. 1-1/32")
(Field supply)
Position to
fasten hose
bands
Hose band
(2 bands, supplied)
Drain hose
(supplied)
Unit
Unit: in.
Prohibited
Air bleeder
11-13/16" or less
(not a downward gradient)
19-11/16" or less
at least 1/100
Good
Prohibited
Upward gradient
Support pieces
Fig. 3-29
Fig. 3-30
Fig. 3-31
Fig. 3-32
Fig. 3-33