Question 88Refrigeration/AC - QMED70% to pass
In a refrigeration system featuring low-side pump down prior to the automatic shutdown of the compressor, the temperature of the refrigerated space is controlled by the action of a thermostat wired to what device?
AI Explanation
The correct answer is A) liquid line box solenoid.
In a refrigeration system with low-side pump down, the temperature of the refrigerated space is controlled by a thermostat wired to the liquid line box solenoid. The liquid line box solenoid is the valve that opens and closes to allow or restrict the flow of refrigerant liquid into the refrigerated space, thereby controlling the temperature. The thermostat senses the temperature in the refrigerated space and sends a signal to open or close the liquid line box solenoid to maintain the desired temperature.
The other options are incorrect because: B) the suction line solenoid is not involved in temperature control, C) the thermostatic expansion valve controls superheat, not temperature, and D) the low-pressure cutout switch is a safety device that shuts down the compressor, not a temperature control device.
Related Questions
#86 Which of the listed operations will cause an automatically controlled refrigeration compressor to restart if the system features a pump down cycle? #87 What is the purpose of the low-pressure cut-out switch as used as a primary controller for a refrigeration system or unit? #89 How does a refrigeration solenoid valve differ from a modulating valve? #90 A container unit's microprocessor-controlled temperature controller is set at -28.9°C, appropriate for a frozen cargo of ice cream. In this mode of operation, according to the illustrated temperature controller functional diagrams, what should be the operational status of the unit if the actual box temperature is -18.0°C? Illustration GS-RA-035 #91 The sensing line for the low-pressure cutout switch for a refrigeration system is typically connected at what location?