Fujitsu AIRSTAGE AJH072LALBH, Installation Manual

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En-11
Out
door u
nit 1
(Master
unit)
To
ind
oor u
nit
Out
door u
nit 2
(Slave unit 1
)
Out
door u
nit 3
(Slave unit 2)
Outdoor unit branch kit
(Optional)
Liquid pipe
(Field supply)
Gas pipe
(Field supply)
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
Outdoor unit branch kit
A
C B
A
B
C
C
Horizontal
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°
PROHIBITED PROHIBITED PROHIBITED
Vertical
• Install the outdoor unit branch kit horizontally level, 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 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
• Leave the distance 0.5 m or more for straight part to outdoor unit branch kit.
3) About the connecting curvature of fi eld pipe and branch kit:
The fi eld 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
fi eld 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.
Fig. Examples of multiple unit installation
(Example 1)
Master unit Slave unit1 Slave unit2
(Example 3)
Master
unit
Slave
unit1
Slave
unit2
(Example 2)
Master unit Slave unit1 Slave unit2
CAUTION
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
GOOD
GOOD
GOOD
Master
unit
Slave
unit 1
Slave
unit 2
Master
unit
Slave
unit 1
Slave
unit 2
Master
unit
Slave
unit 1
Slave
unit 2
To indoor unit
To indoor unit
To indoor unit
b) Non-installable patterns
PROHIBITED
Master
unit
Slave
unit 1
Slave
unit 2
To indoor unit
PROHIBITED
Master
unit
Slave
unit 1
Slave
unit 2
To indoor unit
PROHIBITED Master
unit
Slave
unit 1
Slave
unit 2
To indoor unit
(2) If the pipe length between outdoor unit branch kit and outdoor unit branch kit
(or slave unit) is longer than 2 m, or a lower pipe line exists between outdoor
units, rise for 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 2m.
Master
unit
Slave
unit 1
Slave
unit 2
To indoor unit
2 m or less 2 m or less
Gas pipe
9378945180-02_IM.indb 11 9378945180-02_IM.indb 11 2014/11/10 19:39:56 2014/11/10 19:39:56