Fujitsu Airstage AJYA72GALH Manuel D'installation page 10

0.5 m or more
Main pipe
To indoor unit
0.5 m or more
Main pipe
To indoor unit
0.5 m or more
Separation tube
Header
0.5 m or more
To indoor unit
5. 3. Piping method
5. 3. 1. Opening the knockout hole
CAUTION
Be careful to prevent panel deformation or damaged while opening the knockout
hole.
To prevent cutting of the wiring after the knockout hole was opened, remove the
burrs along the edge.
In addition, to prevent rusting, painting the edge with rust preventive paint is recom-
mended.
The piping can be connected from 2 directions; the front or the bottom.
(Knockout holes are provided so that the piping can be connected from 2 different
directions.)
Use the front knockout hole, as required.
Fig. A Knockout position
Fig. B Detail of knockout position (bottom)
(Unit: mm)
Knockout hole
80
197
82
42
Fig. C Detail of knockout position (front)
(Unit: mm)
Knockout
hole
73 125
43 199
En-9
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Separation tube
To indoor
unit
or
Header
To indoor unit
To indoor
unit
or
5. 3. 2. Removing the pinch pipe
WARNING
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 , suction gas side and discharge gas side 3-way valves
are closed.
3-way valves
2) Cut the end of the liquid side , suction gas side and discharge gas side pinch pipe
and vent the gas inside the pinch pipe.
End of 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.