Refrigeration & Air Conditioning Mechanic Red Seal · Question
What is the primary function of auxiliary heat strips in a typical air-source heat pump system in a Canadian climate?
Auxiliary heat strips provide supplemental heating, primarily when the outdoor temperature drops below the heat pump's balance point, or during defrost cycles,
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Question: What is the primary function of auxiliary heat strips in a typical air-source heat pump system in a Canadian climate?
Answer options: ✅ To provide supplemental heating when the heat pump's capacity alone cannot meet the demand or during defrost cycles.
- To pre-heat the refrigerant before it enters the compressor to improve COP.
- To maintain a constant indoor temperature during mild weather, reducing compressor cycling.
- To dehumidify the indoor air more effectively than the heat pump's cooling cycle.
Correct answer: To provide supplemental heating when the heat pump's capacity alone cannot meet the demand or during defrost cycles.
Explanation: Auxiliary heat strips provide supplemental heating, primarily when the outdoor temperature drops below the heat pump's balance point, or during defrost cycles, where the outdoor coil becomes too cold to extract sufficient heat from the air. This ensures consistent indoor comfort.
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