Johnson Controls YVAHP0721CW Series, Service Manual

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1-30
SM-16007
INSTALLATION
6.2 Piping Connection Work
Comply with the restrictions for refrigerant piping (permissible length, height difference) in Section 6.5 “Piping
Work Conditions” and “Piping Branch Restriction”. If not, the outdoor unit can become damaged or fail.
The stop valves will be closed completely (factory-setting) when refrigerant piping connections are performed.
Do not open these stop valves until all the refrigerant piping connections, airtight testing, and vacuuming
have been completed.
6.2.1 Stop Valve
< Gas Valve >
(1) Make sure that all the spindles are closed completely.
(2) Connect the charging hose to the service port and release the gas inside the piping.
(3) Cut the end of the closing pipe and ensure that no residual gas exists inside the gas piping.
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the stop valve.
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,IWKHEUD]LQJ¿OOHUPHWDOPHOWVZLWKUHVLGXDOJDVLQVLGHWKHSLSLQJZLOOH[SORGHDQGLQMXULHVFDQ
result.
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Figure 6.1
Stop Valve for
Liquid Pipe
End of Closing Pipe
Service Port
Stop Valve for
Gas Pipe
Closing Pipe
Cut
Detail of Closing Pipe
Soundproof
Cover
Compressor
Oil Return Pipe
Torch
Metal Plate
Closing Pipe
Stop Valve
Body
Field-Work Side