Toshiba MMD-AP0071SH-C Service Manual page 39

5
DRAIN PIPING WORK
5-1-3. Connection of drain pipe
• Connect the hard socket (local supply) to the hard
socket side of the attached flexible hose which has
been installed.
• Connect the drain pipes (local supply) successively
to the connected the hard socket.
REQUIREMENT
• Using adhesive agent for vinyl chloride, connect
the hard vinyl chloride pipes certainly so that
water does not leak.
• It requires several times to dry and harden the
adhesive agent.
(Refer to Guide Manual of the adhesive agent.)
In this time, be sure not to apply force to the
connecting section with the drain pipes.
5-1-4. Drain up
When a downward grading cannot be secured on the
drain pipe, a drain-up work is possible.
• Set the height of the drain pipe within 850mm from
the bottom surface of the indoor unit.
• Draw out the drain pipe within 300mm from the end
of the drain pipe connecting port of the indoor unit,
and then raise it vertically.
• After the drain pipe has been raised, set a grading
so that it is immediately bent downward.
300mm
or less
Indoor unit
Underneath of ceiling
5-1-5. Check the draining
After drain piping work, check that water drain is
properly performed and water does not leak from the
connecting part of the pipes. In this time, check also
there is no abnormal sound of the motor of the drain
pump. Be sure to check draining when installed in the
heating period.
When the electric work has finished:
• Pour water as shown in the following figure, check
water is drained from the drain pipe connecting port
in COOL mode, and then check there is no water
leak from the drain pipes.
When the electric work has not finished:
• Pull out the float switch connector (3P: Red) from
P.C. board connector (CN34: Red) of the electric
parts box. (In this time, be sure to check the power
is turned off.)
• Connect the single-phase 220V, 50Hz power to the
terminal blocks R (L) and S (N).
(Never apply 220V to (A), (B), (U1),and (U2),
otherwise a trouble of P.C. board occurs.)
• Pour water referring to the figure.
(Amount: 1500cc to 2000cc)
• When the power is turned on, the drain pump motor
drives automatically. Check water is drained from
the drain pipe connecting port, and then check there
is no water leak from the drain pipes.
• After check of draining and water leak, turn off the
power supply, attach the float switch connector to
the original position (CN34) of P.C. board, and then
set the electric parts box as before.
220V, 50Hz
R(L) S(N)
White
CN34 Red
(RED)
Black
Pull out connector CN34 (Red) from P.C. board.
Black
CAUTION
Pour water slowly.
If it is poured urgently, water is spread inside of the
indoor unit resulted in a trouble.
Insert the edge of hose into the
drain pan and bend it downward.
Heat insulating process
• After drain check, using the attached heat insulator
for drain connecting section, wrap the flexible hose
without clearance from the end of the drain pipe
connecting port of the indoor unit.
• Covering the attached heat insulator for drain
connecting section, wrap the drain pipe with heat
insulator (local supply) without clearance.
Cover plate
Pump
Vessel
Water
(1500cc~2000cc)
Flexible hose Hose band
Attached heat insulator Heat insulator to be
procured locally
Hard vinyl chloride pipe