Refrigeration & Air Conditioning Mechanic Red Seal · Question
A refrigeration machinery room contains equipment with 75 kg of R-410A. According to CSA B52, what is the minimum required exhaust ventilation capacity in L/s for this room, assuming normal operation?
CSA B52 specifies a minimum general ventilation rate of 0.5 L/s per kilogram of refrigerant for machinery rooms. For 75 kg of R-410A, this equates to 75 kg * 0.
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Question: A refrigeration machinery room contains equipment with 75 kg of R-410A. According to CSA B52, what is the minimum required exhaust ventilation capacity in L/s for this room, assuming normal operation?
Answer options: ✅ 150 L/s
- 75 L/s
- 225 L/s
- 300 L/s
Correct answer: 150 L/s
Explanation: CSA B52 specifies a minimum general ventilation rate of 0.5 L/s per kilogram of refrigerant for machinery rooms. For 75 kg of R-410A, this equates to 75 kg * 0.5 L/s/kg = 37.5 L/s. However, Section 7.2.1.2 mandates a minimum of 150 L/s for any machinery room.
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- Which component is responsible for compressing the refrigerant vapour to a high pressure and temperature?
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