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THE INDOOR UNIT INSTALLATION
20
Indoor unit drain piping
- Drain piping must have down-slope (1/50 to
1/100): be sure not to provide up-and-down
slope to prevent reversal flow.
- During drain piping connection, be careful
not to exert extra force on the drain port on
the indoor unit.
- Remove the rubber stopple before
connecting drain hose.
- Hook on the bracket after connecting the
drain hose as below.
Drain piping
- The drain hose should point downward for
easy drain flow.
- Do not make drain piping like the following.
- Be sure to execute heat insulation on the
Bracket
Drain hose
Drain test
Use the following procedure to test the drain
pump operation:
Downward
slope
- Set the air direction louvers up-and-down to
- Pour a glass of water on the evaporator
- Ensure the water flows through the drain
Do not raise
Water
leakage
Tip of drain
hose dipped
in water
Water
leakage
Ditch
drain piping.
Heat insulation material: Polyethylene foam
with thickness more than 8 mm.
the position(horizontally) by hand.
using a kettle.
hose of the indoor unit without any leakage
and goes out the drain exit.
Accumulated
drain water
Air
Water
Waving
leakage
Less than
50 mm gap
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