Design Technical Manual

Table Of Contents
Note: If the pipe length between outdoor unit branch kit and outdoor unit branch kit (or slave
unit) is longer than 6ft. (2m), or a lower pipe line exists between outdoor units, rise for gas
pipe (Discharge gas pipe and Suction gas pipe) should be arranged to eliminate oil from
entering into and remaining at pipes and the stopped outdoor unit.
However, there is no need to provide a rise on the pipe connecting between the master
unit and the indoor unit even if the length exceeds 6ft. (2m).
Example
Master
unit
Slave
unit1
Slave
unit2
To indoor
unit
6ft.(2m)
or less
6ft.(2m)
or less
Discharge gas pipe
Suction gas pipe
To indoor
unit
Rise
6ft.(2m)
or less
6ft.(2m)
or less
6ft.(2m) or more
Discharge gas pipe
Suction gas pipe
Master
unit
Slave
unit1
Slave
unit2
To indoor
unit
Rise Rise
6ft.(2m)
or less
6ft.(2m)
or less
6ft.(2m) or more
6ft.(2m) or more
Discharge gas pipe
Suction gas pipe
Master
unit
Slave
unit1
Slave
unit2
To indoor
unit
Rise
Discharge gas pipe
Suction gas pipe
Lower pipe
19in. (500mm)
or less
Master
unit
Slave
unit1
Slave
unit2
Rise height : 7-7/8in. (200mm) or more
- (06 - 65) -
SYSTEM
DESIGN
SYSTEM
DESIGN