Refrigeration & Air Conditioning Mechanic Red Seal · Question
A thermostatic expansion valve (TXV) on an R-407C system is overfeeding, resulting in high suction pressure and liquid refrigerant returning to the compressor. How should the TXV superheat adjustment screw typically be altered?
Turning the adjustment screw clockwise compresses the spring, increasing the spring force and therefore increasing the superheat setting, which reduces the refr
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Question: A thermostatic expansion valve (TXV) on an R-407C system is overfeeding, resulting in high suction pressure and liquid refrigerant returning to the compressor. How should the TXV superheat adjustment screw typically be altered?
Answer options: ✅ Turned clockwise to increase superheat.
- Turned counter-clockwise to increase superheat.
- Turned clockwise to decrease superheat.
- Turned counter-clockwise to decrease superheat.
Correct answer: Turned clockwise to increase superheat.
Explanation: Turning the adjustment screw clockwise compresses the spring, increasing the spring force and therefore increasing the superheat setting, which reduces the refrigerant flow through the valve to the evaporator.
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- 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
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