Refrigeration & Air Conditioning Mechanic Red Seal · Question
A refrigeration system operating with R-134a has a design pressure of 1800 kPa on the high side. According to CSA B52, what is the maximum permissible setting for the pressure relief valve (PRV) on this high-pressure side?
CSA B52 specifies that the pressure relief device shall be set to open at a pressure not exceeding the design pressure of the high side by more than 10%. Theref
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Question: A refrigeration system operating with R-134a has a design pressure of 1800 kPa on the high side. According to CSA B52, what is the maximum permissible setting for the pressure relief valve (PRV) on this high-pressure side?
Answer options:
- 1800 kPa ✅ 1980 kPa
- 2070 kPa
- 2160 kPa
Correct answer: 1980 kPa
Explanation: CSA B52 specifies that the pressure relief device shall be set to open at a pressure not exceeding the design pressure of the high side by more than 10%. Therefore, 1800 kPa * 1.10 = 1980 kPa.
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- Which component is responsible for compressing the refrigerant vapour to a high pressure and temperature?
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- What is the main operating characteristic difference between a fixed orifice (capillary tube) and a Thermostat
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