Refrigeration & Air Conditioning Mechanic Red Seal · Question
What is the advantage of using a variable frequency drive (VFD) with a compressor?
A VFD adjusts the compressor's motor speed based on demand, leading to precise capacity control, reduced starting current, and significant energy savings compar
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Question: What is the advantage of using a variable frequency drive (VFD) with a compressor?
Answer options:
- It increases the compressor's operating speed to maximum at all times
- It eliminates the need for refrigerant charge ✅ It allows for precise capacity control and improved energy efficiency
- It protects the compressor from liquid slugging
Correct answer: It allows for precise capacity control and improved energy efficiency
Explanation: A VFD adjusts the compressor's motor speed based on demand, leading to precise capacity control, reduced starting current, and significant energy savings compared to on/off operation.
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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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