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5. Refrigerant Piping Work
5.4 Piping Connection Work
Comply with the restrictions for refrigerant piping
(permissible length, height difference) in item 5.4.2 Piping
Connection Method. If not, the outdoor unit may be
damaged or fail.
The stop valves shall be closed completely (factory
setting) when the refrigerant piping connection is
performed. Do not open the stop valves until all
the refrigerant piping connections, air-tight test and
vacuuming have been completed.
5.4.1 Removing of Closing Pipes
Step1.
Make sure that all the valve stems are closed
completely.
Step2.
Connect the charging hose to the service port
and release the gas inside the piping from the
gas pipe.
Step3.
Cut the end of the closing pipe and check that
no gas exists inside the gas pipe.
Step4.
Remove the stop valve cover.
Step5.
Remove the closing pipe from the brazing
portion with a burner.
Pay attention to the flame from the burner not
to burn the stop valve body.
•
Heat Pump
Liquid Valve
Cutting Portion
( 6.35 Pipe)
Cut Here
Closing Pipe
Heat Exchanger Fin
Heat Exchanger
Metal Plate for
Protection
Closing Pipe
33
Service Port
Gas Valve
Stop Valve Cover
(Read the precautions.)
End of Closing Pipe ( 6.35)
Liquid Valve
Gas Valve (Body)
Field Piping Connecting
Portion of Gas Valve
Valve Stay
Burner
•
Heat Recovery
Service Port
Stop Valve for
Liquid Valve
Cutting Portion
( 6.35 Pipe)
Cut Here
Heat Exchanger Fin
Heat
Exchanger
Metal Plate for
Protection
Closing Pipe
Fig. 5.1 Brazing of Closing Pipe
Stop Valve for Gas Valve
(High/Low Pressure)
Stop Valve for Gas Valve
(Low Pressure)
Stop Valve Cover
(Read the precautions.)
End of Closing Pipe ( 6.35)
Closing Pipe
Stop Valve for Liquid Valve
Stop Valve for Gas Pipe (Body)
(High/Low Pressure)
Stop Valve for Gas Pipe (Body)
(Low Pressure)
Field-Work Side
Valve Stay
Torch
A16381E84N-rev.1
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