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10.4.5. Indoor unit drain piping
• Be sure to use the drain hose provided (accessory item.)
• 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 at the indoor unit.
• The outside diameter of the drain connection at the indoor
unit is 20 mm.
In the case of left piping
1. Remove both the internal and external plugs.
2. Use a wrench or pliers to remove the plugs.
• Putting substitution of rubber plug.
Drain Test
Confirm the drain water flows smoothly after connecting the
drain piping.
• Pour water to about 1.5 liters for the drain confirmation from
the air inlet part which should gradually flow into the drain
pan.
10.4.6. Heat insulation
1. Use the heat insulation material for the refrigerant piping which has an excellent heat-resistance (over 100°C).
Piping material: Polyvinyl chloride pipe VP-20 and pipe fittings
Heat insulation material: Polyethylene foam with thickness more than
8mm (local supply).
Be sure to perform heat insulation on the drain piping.
Caution
If insulation is insufficient, dew may form.
This causes water leakage.
Prevent the drain hose from floating and hanging
Caution
down.
This causes water leakage. (down figure)
Caution
Be sure to perform heat insulation on the drain, liquid and gas piping. Imperfection in heat insulation work leads to water leakage.
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