En-10
Pipe connection5. 3. 3.
CAUTION
Seal the pipe route hole with putty (fi eld supply) such that there are no gaps.
Small insects or animals that are trapped in the outdoor unit may cause a short circuit
in the electrical component box.
To prevent pipe damage; do not make sharp bends.
Bend the pipe at a radius of 70mm or greater.
Do not bent pipe many times at same part to prevent break.
After completing all the pipe connection by brazing, perform the indoor unit pipe con-
nection with a fl are joint.
When removing the pinch pipe or brazing the joint pipe, carry out the work while
cooling down the 3-way valve suffi ciently.
Braze the joint pipe onto the 3-way valves at the liquid , suction gas and discharge •
gas side.
Install the joint pipe appropriately so that it can be connected easily with the main
pipe.
Braze the joint pipe at the liquid , suction gas and discharge gas side with the main •
pipe.
* Be sure to supply nitrogen when brazing.
AFig.
Knockout hole
Joint pipe D
(Accessory)
Joint pipe B
(Accessory)
Suction gas pipe
(Field supply)
Discharge gas pipe
(Field supply)
Liquid pipe
(Field supply)
Joint pipe
(Field supply)
To RB unit or indoor unit
BFig.
Joint pipe
(Field supply)
Knockout hole
Joint pipe C
(Accessory or fi eld supply) *1
Joint pipe A
(Accessory or fi eld supply) *1
*1) Field supply and accessory
depend on the model, so for
details, refer "2.3. Accessories".
Multiple connections5. 4.
CAUTION
When connecting multiple (maximum 3) units, be sure to install the unit with the •
largest capacity nearest to the indoor unit.
For example) AJ
108GALH (Outdoor Unit1) + AJ
A90GALH (Outdoor Unit2) +
AJ
A72GALH (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.•
Outdoor unit 1
(Master unit)
To indoo r u n it
Outdoor unit 2
(Slave unit 1)
Outdoor unit 3
(Slave unit 2)
Outdoor unit
branch kit
(Optional)
Liquid pipe
(Field supply)
Discharge gas pipe
(Field supply)
Suction gas pipe
(Field supply)
Joint pipe
(Accessory)
To indoo r u n it
(To main pipe)
To outdoor uni t
To outdoor uni t
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.
Installation angle 1)
Outdoor unit branch kit
A
C
B
A
B
C
C
Horizontal
To indoo r u n it
To outdoor uni t
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.•
Straight pipe length 2)
To indoo r u n it
(To main pipe)
To outdoor uni t
To outdoor uni t
To outdoor uni t
0.5 m or more
0.5 m or more
To indoor unit (To main pipe)
To outdoor uni t
To outdoor
unit
Leave the distance 0.5 m or more for straight part to outdoor unit branch kit.•
For details, refer to the Installation Instruction Sheet of the outdoor unit branch kit. 3)
Examples of multiple unit installationFig.
Master
unit
Slave
unit1
Slave
unit2
(Example 3)
(Example 1)
(Example 2)
Master unit Slave unit1 Slave unit2
Master unit Slave unit1 Slave unit2
9378945111_IM.indb Sec1:109378945111_IM.indb Sec1:10 2012/11/14 09:49:002012/11/14 09:49:00
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