Toshiba MMU-AP0072WH, Installation Manual, Page: 16 / 36

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SMMS 2-way Air Discharge Cassette Type Installation Manual
EN-29 EN-30
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Connecting drain pipe
• Connect a hard socket (procured locally) to the hard socket of the attached supplied flexible hose.
• Connect a drain pipe (procured locally) to the connected hard socket.
CAUTION
• Connect hard vinyl chloride pipes securely using an adhesive for vinyl chloride to avoid water leakage.
• It takes some time until the adhesive is dried and hardened (refer to the manual of the adhesive). Do not apply
stress to the joint with the drain pipe during this time period.
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Drain up
When a down-gradient cannot be secured for the drain pipe, drain-up piping is possible.
• The height of the drain pipe must be 850 mm or less from the underside of the ceiling.
• Take the drain pipe out of the drain pipe joint with the indoor unit in 300 mm or less, and bend up the pipe vertically.
• Immediately after the pipe is bent up vertically, lay the pipe making a down-gradient.
Model: MMU- Rise: A
AP007 to AP015 609 mm or less
AP018 to AP056 559 mm or less
300 mm or less
Indoor unit
Underside of ceiling
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: A
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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. When doing this, also check that no abnormal sounds are heard from the drain pump motor. Be sure to check
draining also when installed in heating period.
When the electrical and wiring work has been completed
• Before attaching the panel, pour some water by following the method shown in the following figure. Then, while
performing a cooling operation, check that the water drains from the drain pipe connecting port (transparent) and
that no water is leaking from the drain pipe.
When the electrical and wiring work has not been completed
• Disconnect the float switch connector (3P: red) from the connector (CN34: red) on the printed circuit board inside
the electrical parts box. (Before doing this, be absolutely sure that the power has been turned off.)
• Connect a 220 V to 240 V supply voltage to (L) and (N) on the power supply terminal block. (Never apply a 220 V to
240 V voltage to (A), (B), (U1) or (U2) of the power supply terminal block. Otherwise, the printed circuit board may
be damaged.)
• Pour the water by following the method shown in the following figure. (Amount of water poured: 1500 cc to 2000 cc)
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