Multiple Connections - Fujitsu AIRSTAGE AJY072LNTCH Installation Manual

Fig. A Knockout position
Fig. B Detail of knockout position
(bottom)
(Unit: mm)
Knockout
hole
5. 3. 2. Removing the pinch pipe
Remove the pinch pipe only when the internal gas is completely drained as shown
on the below instructions.
If gas still remains inside, the piping may crack if you melt the brazing fi ller metal of
the junction area with a burner.
Before connecting the piping, remove the pinch pipe in accordance with the following
instructions:
1) Verify that the liquid side and gas
side 3-way valves are closed.
3-way valve
Pinch pipe
3) After all the gas is vented, melt the
brazing fi ller metal on connecting
part using a torch and remove the
pinch pipe.
Fig. C Detail of knockout position
(front)
(Unit: mm)
Knockout hole
73 125
43 199
WARNING
2) Cut the end of the liquid side and gas
side pinch pipe and vent the gas inside
the pinch pipe.
End of pinch pipe
5. 3. 3. Pipe connection
Seal the pipe route hole with putty (Locally purchased) 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 and 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 and gas side with the main pipe.
* Be sure to supply nitrogen when brazing.
Fig. A
Joint pipe
(Locally purchased)
Liquid pipe
(Locally purchased)
Fig. B
Joint pipe
(Locally purchased)
Strainer
(Accessory)
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  126LNTCH (Outdoor Unit1) + AJ  126LNTCH (Outdoor Unit2) +
AJ  090LNTCH (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.
CAUTION
Joint pipe
(Accessory)
Knockout hole
Gas pipe
(Locally purchased)
Strainer
(Accessory)
To indoor unit
Joint pipe
(Accessory)
Knockout hole
CAUTION
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