En-15
Removing the pinch pipe
5. 3. 2.
WARNING
Remove the pinch pipe only when the internal gas is completely drained.
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:
Verify that the liquid side and gas side 3-way valves are closed. (Fig. A)
1)
Cut the end of the liquid side and gas side pinch pipe and vent the gas inside the pinch pipe. (Fig. B)
2)
After all the gas is vented, melt the brazing
fi
lter metal on connecting part using a burner and remove the
3)
pinch pipe. (Fig. C)
A
Fig.
3-way valve
Pinch pipe
B
Fig.
End of pinch pipe
C
Fig.
Pipe connection
5. 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 in the pipe.
•
Bend the pipe at a radius of 70mm or greater.
Do not bent pipe many times at same part to prevent break.
•
Do not use
fl
are connection on the indoor unit pipe until the connection piping has been connected.
•
Wait until the 3-way valve is completely cooled down before removing the pinch pipe or brazing the joint pipe.
•
Otherwise, the 3-way valve may be damaged.
Blaze the joint pipe onto the 3-way valves at the liquid and gas side.
•
Process the joint pipe appropriately so that it can be connected easily with the main pipe.
Blaze the joint pipe at the liquid and gas side with the main pipe.
•
* Be sure to supply nitrogen when blazing.
A
Fig.
Liquid pipe
(Field supply)
Joint pipe
(accessory)
To indoor unit
Knockout
hole
Gas pipe
(Field supply)
Joint pipe
(Field supply)
B
Fig.
Joint pipe
(Field supply)
Joint pipe
(accessory)
Knockout
hole
9378945029-03_IM_EN.indb 15
9378945029-03_IM_EN.indb 15
2011-9-20 16:25:50
2011-9-20 16:25:50
