Fujitsu AJ*A72LALH Series Installation Manual page 17

Fig. Examples of multiple unit installation
(Example 1)
Master unit Slave unit1 Slave unit2
(Example 2)
Master unit Slave unit1 Slave unit2
To prevent the oil from settling in the stopped unit, install the pipes between the outdoor units so that they are level
or are tilted upward to the outdoor units.
(1) Examples of multiple unit installation are shown below.
a) Installable patterns
Master Slave
GOOD
unit unit 1
To indoor unit
Master Slave
GOOD
unit unit 1
To indoor unit
Slave
GOOD
Master
unit 1
unit
To indoor unit
(2) When the length between branch kits and the length of the branch kit and outdoor units is more than 2m,
provide a rise of 200mm or more on the gas pipe. However, there is no need to provide a rise on the pipe
connecting to the master unit even if the length exceeds 2m.
a) In case of less than 2m
Master Slave
unit unit 1
To indoor unit
Less than 2 m
Outdoor unit branch kit
(Example 3)
Master
unit
Slave
unit1
Slave
unit2
CAUTION
b) Non-installable patterns
Slave
NO GOOD
unit 2
To indoor unit
Slave
unit 2
NO GOOD
To indoor unit
Slave
unit 2
NO GOOD
To indoor unit
b) In case of 2m or more
Slave
unit 2
To indoor unit
Gas
pipe
Master Slave Slave
unit unit 1 unit 2
Slave Slave
Master
unit 1 unit 2
unit
Master Slave Slave
unit unit 1 unit 2
Master Slave
unit unit1
Outdoor unit
branch kit
Gas pipe
2 m or less
2 m or more
Slave
unit2
Rise
200 mm or more
En-17