Drain Piping - Toshiba RAV-SM2244DTP-E Installation Manual

REQUIREMENT
Removing the cardboard for transportation
Make sure to remove the protection cardboard for transportation that is inserted in the gap between the top
cabinet and the heat exchanger before installing the indoor unit.
Heat exchanger
Protection cardboard
for transportation
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Top cabinet
– 10 –
5

Drain piping

CAUTION
Following the Installation Manual, perform the drain piping work so that water is properly drained. Apply a
heat insulation so as not to cause a dew condensation.
Inappropriate piping work may result in water leakage in the room and wet furniture.
Provide the indoor drain piping with proper heat insulation.
Provide the area where the pipe connects to the indoor unit with proper heat insulation. Improper heat insulation
will cause condensation to form.
The drain pipe must be sloping downward (at an angle of 1/100 or more), and do not run the pipe up and down
(arched shape) or allow it to form traps. Doing so may cause abnormal sounds.
Restrict the length of the traversing drain pipe to 20 meters or less. For a long pipe, provide support brackets at
intervals of 1.5 to 2 meters to prevent flapping.
Install the collective piping as shown in the following figure.
Do not provide any air vents. Otherwise, the drain water will spout, causing water to leak.
Do not allow any force to be applied to the connection area with the drain pipe.
Support
bracket
1.5 to 2 m
Heat insulator
Downward slope
1/50 to 1/100
Downward slope
1/50 to 1/100 or
more
Pipe material, size and insulator
The following materials for piping work and insulating process are locally procured.
Pipe material Hard vinyl chloride pipe VP25 (Nominal outer diameter Ø32 mm)
Insulator Foamed polyethylene foam, thickness: 10 mm or more
As long as possible
Arched shape
VP-30 Trap
Incorrect
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EN
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EN
20-EN