DM17-01.01.08en Light Commercial R410A on-off
160
Indoor unit
More than 50mm
More than 25mm
Plug
Water storage pipe
6.2.7 Lifting pipe setting of indoor unit with water pump
The length of lifting pipe should not exceed the pump head of indoor unit water pump.
Pump head of big four way cassette: 750mm
Pump head of compact four way cassette: 500mm
The drainage pipe should be set down inclined after the lifting pipe immediately to avoid wrong
operation of water level switch.
Refer the following picture for installation reference.
Flexible pipe 300mm
Hanger
A
A:Length of horizontal pipe≤150mm
B: Lift height
≤the pump head of water pump
Down incline pipe
B
6.2.8 Blowhole setting
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 unit of the system should be installed it.
The installation should be considering the convenience for future cleaning.
Blowhole
Plug
Indoor unit
Plug
Indoor unit
6.2.9 The end of drainage pipe shall not contact with ground directly.
6.3 Drainage test
6.3.1 Water leakage test
After finishing the construction of drainage pipe system, fill the pipe with water and keep it for 24 hours to
check whether there is leakage at joint section.
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