Pioneer LISAS-B-1403 Service Manual page 98

Drainage pipe installation
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: 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.
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.
Indoor unit
6.2.9 The end of drainage pipe shall not contact with ground directly.
96
Plug
Water storage pipe
Hanger
Down incline pipe
A:Length of horizontal pipe ≤ 150mm
B
B: Lift height ≤ the pump head of water pump
Flexible pipe 300mm
Blowhole
Plug
More than 50mm
More than 25mm
Indoor unit
Plug
Installation