Fisher FSKIF-121AE2-EU Service Manual page 113

Indoor unit
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: 750mm
 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.
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.
6.2.9 The end of drainage pipe shall not contact with ground directly.
Installation
Plug
Water storage pipe
Hanger
B
Flexible pipe 300mm
Indoor unit
Plug
Down incline pipe
A:Length of horizontal pipe ≤ 150mm
B: Lift height ≤ the pump head of water pump
Blowhole
Indoor unit
Plug
Drainage pipe installation
More than 50mm
More than 25mm
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