Multiple Connections - Fujitsu AJ*A72LALH Series Installation Manual

5. 4.

Multiple connections

• When connecting multiple (maximum 3) units, be sure to install the unit with the largest capacity nearest to the
indoor unit.
For example) AJ 126LALH (Outdoor Unit1) + AJ 126LALH (Outdoor Unit2) + AJ A90LALH (Outdoor Unit3)
• When connecting multiple units, set the unit with the largest capacity as the master unit, and the rest as the slave units.
(Refer to 7. Field Setting)
• When connecting multiple units, use the optional outdoor unit branch kit.
To indoor unit
(To main pipe)
To outdoor unit
To outdoor unit
Restriction when install
Be sure following restriction.
1) Installation angle
A
To indoor unit
A
0 to -10
• Install the outdoor unit branch kit horizontally, within 0° to -10°, so that the refrigerant separates evenly.
• Do not install the outdoor unit branch kit vertically.
2) Straight pipe length
To indoor unit
To outdoor unit
(To main pipe)
0.5m or more
• Leave the distance 0.5m or more for straight part to outdoor unit branch kit.
3) For details, refer to the Installation Instruction Sheet of the outdoor unit branch kit.
En-16
Liquid pipe
Outdoor unit
(Field supply)
branch kit
(Optional)
Horizontal
B
To outdoor unit
To outdoor unit
C
or next branch kit
C B
To outdoor unit
To outdoor unit
CAUTION
Gas pipe (Field supply)
Outdoor unit branch kit
No good
0 to -10
To indoor unit (To main pipe)
0.5m or more
Outdoor Capacity
2 Unit : Unit1
3 Unit : Unit1
Joint pipe
(Accessory)
Vertical
No good
> =
Unit2
> = > =
Unit2 Unit3
No good
To outdoor unit
To outdoor
unit