Design Technical Manual

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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 filler 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.
(Fig. A)
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. (Fig. B)
3) After all the gas is vented, melt the brazing ller metal on connecting part using a torch and
remove the pinch pipe. (Fig. C)
3-way valves
End of
pinch pipe
Fig.A Fig.B Fig.C
- (06 - 67) -
SYSTEM DESIGN SYSTEM DESIGN