13
THE INDOOR UNIT INSTALLATION
ENGLISH
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.
- Be sure to execute heat insulation on the
drain piping.
Heat insulation material: Polyethylene foam
with thickness more than 8 mm.
Drain piping
- The drain hose should point downward for
- Do not make drain piping like the following.
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.
Do not raise
Accumulated
drain water
Air
Waving
Water
leakage
Water
leakage
Ditch
Less than
50 mm gap
Water
leakage
Tip of drain
hose dipped
in water
Downward
slope
ENGLISH
Wall
Indoor
Outdoor
Slope gradient for
drain Should be
1/50 ~ 1/100
Drain hose
Bracket
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