Refrigeration & Air Conditioning Mechanic Red Seal · Question
A technician is performing a service on a commercial refrigeration system containing R-404A. Before opening the system, what is the mandatory first step according to environmental regulations?
Canadian environmental regulations, such as those derived from the Canadian Environmental Protection Act, mandate the recovery of all regulated refrigerants pri
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Question: A technician is performing a service on a commercial refrigeration system containing R-404A. Before opening the system, what is the mandatory first step according to environmental regulations?
Answer options:
- Purge the system with nitrogen to remove remaining refrigerant. ✅ Recover all refrigerant from the isolated section into an approved recovery cylinder.
- Vent any residual refrigerant to the atmosphere if the amount is small.
- Check manifold gauge readings for system pressure.
Correct answer: Recover all refrigerant from the isolated section into an approved recovery cylinder.
Explanation: Canadian environmental regulations, such as those derived from the Canadian Environmental Protection Act, mandate the recovery of all regulated refrigerants prior to opening the system. Venting refrigerants to the atmosphere is illegal, and purging with nitrogen should only occur after recovery.
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Question explanations
- Which of the following refrigerants is a hydrofluorocarbon (HFC) and has a high ozone depletion potential (ODP
- Which component is responsible for compressing the refrigerant vapour to a high pressure and temperature?
- According to the Canadian Electrical Code (CEC), what is the minimum required working clearance in front of el
- What is the main operating characteristic difference between a fixed orifice (capillary tube) and a Thermostat
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