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Indoor unit drain piping
- Drain piping must have down-slope (1/50 to
1/100): be sure not to provide up-and-down
- During drain piping connection, be careful
not to exert extra force on the drain port on
the indoor unit.
- Remove the rubber stopple before connect-
ing drain hose.
- Hook on the bracket after connecting the
drain hose as below.
Drain piping
- The drain hose should point downward for
Wall
Indoor
Bracket
Drain hose
Downward
slope
Outdoor
Slope gradient for
drain Should be
1/50 ~ 1/100
THE INDOOR UNIT INSTALLATION
- Do not make drain piping like the following.
Do not raise
Water
leakage
Tip of drain
hose dipped
in water
Water
leakage
- Be sure to execute heat insulation on the
drain piping.
Heat insulation material: Polyethylene foam
with thickness more than 8 mm.
Drain test
Use the following procedure to test the drain
pump operation:
- Set the air direction louvers up-and-down to
the position(horizontally) by hand.
- Pour a glass of water on the evaporator
using a kettle.
hose of the indoor unit without any leakage
and goes out the drain exit.
Accumulated
drain water
Water
Waving
leakage
Less than
50 mm gap
Ditch
13
Air
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