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1-395
6-5. Indoor Unit Drain Piping
During drain piping connection, be careful not to exert extra force on the drain port at the indoor unit.
The outside diameter of the drain connection at the indoor unit is 32 mm.
Piping material: Polyvinyl chloride pipe VP-25 and pipe fittings.
Be sure to perform heat insulation on the drain piping.
Heat insulation material: Polyethylene foam with thickness more than 8 mm (local supply).
Drain piping must have down-slope (1/50 to 1/100); be sure not to provide up-and-down slope to prevent reversal flow.
Be sure to check no air trap on drain hose and to ensure smooth water flow and no abnormal sound.
Upward routing
Indoor
unit
Pipe clamp
Down-slope
Trap
Fig. 1-129
Down-slope Upward-slope
No Air TrapAir Trap
Fig. 1-130
The height of drain may be possible up to 750 mm.
Drain port
Indoor unit
750 mm or less
Down-slope (1/50 ~ 1/100)
Elbow
Elbow
Fig. 1-131
When drain set piping, install as shown in the figure below.
Use VP30 or more for confluence
Indoor
unit
Down-slope (1/50 ~ 1/100)
Apply the head when connecting with
the conļ¬uence pipe. (about 100 mm)
Fig. 1-132
Drain Test
The air conditioner uses a drain up motor to drain water.
Use the following procedure to test the drain up motor operation.
Connect the main drain pipe to exterior and leave it
provisionally until the test comes to an end.
Feed water to the flexible drain hose and check the piping for
leakage.
Be sure to check the drain up motor for normal operating and
noise when electric wiring is complete.
When the test is complete, connect the flexible drain hose to
the drain port.
Drain hose connection
Use the clip (accessory)
Feed water
Drain up motor
Drain hose
Main drain pipe
Glue the joint
Drain
port
Fig. 1-133
SM830231-02īSingleī꬧å·.indbīīī395SM830231-02īSingleī꬧å·.indbīīī395 2014/09/19īīī13:22:052014/09/19īīī13:22:05
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