Toshiba RAV-SM1100UT-E Service Manual page 40

3
DRAIN PIPING WORK
Connection procedure
Connect a socket and a hard vinyl chloride pipe.
• Using adhesive agent for vinyl chloride pipe, connect
the drain pipes certainly so that water does not leak.
• It takes approx. 10 hours to dry and harden the
adhesive agent. During this period, do not apply
force to the connecting part with the drain pipe.
Perform heat insulating.
• As shown in the figure, cover the flexible hose and
hose band with the attached heat insulator up to the
bottom of the indoor unit without gap.
Flexible hose
Attached heat insulator Heat insulator to be
Drain up
When a downward grading cannot be secured on the
drain pipe, drain-up up to 640mm is possible.
Set downward grading immediately after raising up
vertically.
360mm
or less
Indoor unit
Hose band
procured locally
Hard vinyl chloride pipe
Underneath of ceiling
Check the draining
In the test run, check that water drain is properly
performed and water does not leak from the
connecting part of the pipes.
Be sure to check draining also when installed in
heating period.
Using a pitcher or hose, pour water (1500 to 2000cc)
into the discharge port before installation of the ceiling
panel.
Pour water gradually so that water does not spread on
the motor of the drain pump.
Heat
exchanger
• After the electric work has finished, pour water
during COOL mode operation.
• If the electric work has not yet finished, pull out the
float switch connector (CN34 : Red) from the electric
parts box, and check draining by plugging the single
phase 220/230/240V power to the terminal blocks 1
and 2.
If doing so, the drain pump motor operates.
• Test water drain while checking the operation sound
of the drain pump motor.
(If the operation sound changes from continuous
sound to intermittent sound, water is normally
drained.)
After the check, the drain pump motor runs,
connecting the float switch connector.
(In case of check by pulling out the float switch
connector, be sure to return the connector to the
original position.)
CN34
(RED)
Black
Pull out connector CN34 (Red) from P.C. board.
Black
37
Drain pan
Single phase 220/230/240V
1 2
White
Red