Fujitsu AIRSTAGE AJ 090LALDH Series - Multiple Connections

En-10
Fig. A
Liquid pipe
(Locally purchased)
Joint pipe
(Accessory)
To indoor unit
Knockout hole
Gas pipe
(Locally purchased)
Joint pipe
(Locally
purchased)
Fig. B
joint pipe
(Locally purchased)
Joint pipe
(Accessory)
Knockout hole
5.5. Multiple connections
CAUTION
• When connecting multiple (maximum 3) units, be sure to install the unit with the larg-
est capacity nearest to the indoor unit.
For example: AJ*126LALDH (Outdoor Unit1) + AJ*126LALDH (Outdoor Unit2) +
AJ*090LALDH (Outdoor Unit3)
• When connecting multiple units, set the unit with the largest capacity as the primary unit,
and the rest as the subordinate units.
(Refer to “7. FIELD SETTING”)
• When connecting multiple units, use the optional outdoor unit branch kit.
Outdoor unit 1
(Primary)
To indoor unit
Outdoor unit 2
(Subordinate 1)
Outdoor unit 3
(Subordinate 2)
Outdoor unit branch kit
(Optional)
Liquid pipe
(Locally purchased)
Gas pipe
(Locally purchased)
Joint pipe
(Accessory)
To indoor unit
(To main pipe)
To outdoor unit
To outdoor unit
Outdoor Capacity
2 Units : Unit 1 ≥ Unit 2
3 Units : Unit 1 ≥ Unit 2 ≥ Unit 3
Branch kit restriction when install
Be sure following restriction.
(1) Installation angle
Install the outdoor unit branch kit horizontally level, within 0° to -10°, so that the refrigerant
separates evenly.
To indoor unit
To outdoor unit
To outdoor unit or next branch kit
PROHIBITED
PROHIBITED
PROHIBITED
PROHIBITED
GOOD:
0° to -10°
GOOD:
0° to -10°
Do not install
the outdoor
unit branch kit
vertically.
PROHIBITED PROHIBITED PROHIBITED
(2) Straight pipe length
Leave the distance 0.5 m or more for straight part to outdoor unit branch kit.
To indoor unit
(To main pipe)
To outdoor unit
To outdoor unit
To outdoor
unit
0.5 m or more
0.5 m or more
To indoor unit (To main pipe)
To outdoor unit
To outdoor
unit
(3) About the connecting curvature of field pipe and branch kit:
The field pipe should
be connected to the
branch kit so that the
curved angle on each
side is 3 degree or
less.
0.5 m
*: Allowed value based on “A” (center
of field pipe) at 0.5 m from “B” (junction
of the branch kit).
* 0 to 26 mm* 0 to 26 mm
(4) For details, refer to the Installation Instruction Sheet of the outdoor unit branch kit.
(Example 3)
(Example 1)
(Example 2)
(Primary)
(Primary)
(Primary)
(Subordinate 1)
(Subordinate 1)
(Subordinate 1)
(Subordinate 2)
(Subordinate 2)
(Subordinate 2)
Examples of multiple unit installation
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