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7-4. Installing Refrigerant Gas Discharge Pipe of Safety Valve
The safety valve is a device preventing damage from a pressure increase by discharging refrigerant gas to the outside
to protect the turbo chiller in case the internal pressure of Centrifugal chiller increases due to the occurrence of an
abnormal temperature in the machine room is caused by fire, etc.
Install the refrigerant gas discharge pipe from the outlet of the safety valve to the outside.
7-4-1. Installation by the High Pressure Gas Safety Law (Follow the regulation of
each region/country)
1) When installing the Centrifugal chiller, the safety valve installed on each Centrifugal chiller must lead gas dis-
charge pipe to the outside based on the regulation provided by Article 8 of "Refrigeration Manufacturing Facility
Standard and Technical Standard" as shown in Fig 13.
2) As the R-134a refrigerant applied to our products is a kind of Freon gas, the discharge pipe of the safety valve
should be installed in a safe location outside the building based on the regulation of "Refrigeration Manufacturing
Facility Standard and Technical Standard."
7-4-2. Precautions when Connecting the Discharge Pipe
1) When connecting the discharge pipe to the safety valve, do not apply excessive force so that the force does not
transfer to the connecting part of the safety valve.
Fix the screws of the safety valve with the proper tools and tighten the screws on the opposite side.
It may cause a failure of the Centrifugal Chiller due to the refrigerant leakage.
2) In order to make it easy to perform the work when connecting the discharge pipe and change safety valve, form
piping connections in the "ㄱ" shape using a flange or union, as shown on the Figure 13.
Figure 13. Installation instruction for safety valve outside discharge pipe
Equipment side
construction
Flange or Union
Discharge pipe
Safety valve
Chiller
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