Refrigeration & Air Conditioning Mechanic Red Seal · Question
A refrigeration system using 150 kg of R-290 (propane) is installed in a standalone machinery room. What is the minimum number of mechanical ventilation fan systems required by CSA B52 to ensure proper machinery room ventilation?
For machinery rooms containing refrigerants Group A3 or B3, or a charge exceeding 50 kg of Group A2, A2L, B2 or B2L, CSA B52 Section 7.2.1.3 requires two fan sy
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Question: A refrigeration system using 150 kg of R-290 (propane) is installed in a standalone machinery room. What is the minimum number of mechanical ventilation fan systems required by CSA B52 to ensure proper machinery room ventilation?
Answer options:
- One primary system with no backup. ✅ One primary system with a standby fan of equal capacity.
- Two independent primary systems, each capable of full ventilation.
- One primary system with a manual override to increase speed.
Correct answer: One primary system with a standby fan of equal capacity.
Explanation: For machinery rooms containing refrigerants Group A3 or B3, or a charge exceeding 50 kg of Group A2, A2L, B2 or B2L, CSA B52 Section 7.2.1.3 requires two fan systems, either two full-capacity fans or one full-capacity fan and one standby fan of equal capacity.
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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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