14
INSTALLATION INSTRUCTIONS
For the concentrated drainage pipe system, there should design a blowhole at the highest
point of main pipe to ensure the condensate water discharge smoothly.
The air outlet shall face down to prevent dirt entering pipe.
Each indoor system should be installed with it.
The installation should consider the convenience for future cleaning.
(5) Ventline setting
The length of lifting pipe should not exceed the pump head of indoor unit water pump.
Pump head of big four way cassette: 29.5 inches (750mm).
Pump head of compact four way cassette: 19.7 inches (500mm) (9k, 12k, 18k units).
The drainage pipe should be set down inclined after the lifting pipe immediately to avoid
wrong operation of water level switch.
Refer to the following picture for installation reference.
(4) Lifting pipe setting of indoor unit with water pump
Flexible pipe
11.8in. (300mm)
Hanger
A
A:Length of vertical pipe
5.9in. (150mm)
B: Lift height
the pump head of water pump
Down incline pipe
B
Plug
Ventline
Plug
Indoor unit
Indoor unit
Fig.32
Fig.33
If the indoor unit has high extra static pressure and without water pump to elevate the
condensate water, such as high extra static pressure duct unit, the water storage pipe
should be set to avoid converse flow or blow water phenomena.
(3) Water storage pipe setting
Indoor unit
More than 1.97in.(50mm)
More than 0.98in.(25mm)
Plug
Water storage pipe
Fig.31
