• Drain piping must have downward slope(1/50 to 1/100): be sure not to provide up-and-down slope to prevent
reverse flow.
• During drain piping connection, be careful not to exert extra force on the drain port on the indoor unit.
• The outside diameter of the drain connection to the indoor unit is 21mm.
• Be sure to install heat insulation on the drain piping
• If converging multiple drain pipes, install according to the procedure shown below.
• After piping work is finished, check for drainage.
• Be sure to insulate all indoor units.
Piping material: Polyvinyl chloride pipe 25mm and
pipe fittings
Heat insulation material: Polyethylene foam with
thickness more than 10 mm.
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