In a multiple-box refrigeration plant, when...

In a multiple-box refrigeration plant, when...

Question 1 of 270705eccef9dbacbc34ba4d46055

In a multiple-box refrigeration plant, when the temperature in a walk-in box rises above the cut-in point of the box thermostat, which of the listed actions should occur FIRST?

Question 1 of 27070

Q

In a multiple-box refrigeration plant, when the temperature in a walk-in box rises above the cut-in point of the box thermostat, which of the listed actions should occur FIRST?

🔍 Key Concepts

• Control sequence in a multiple-box refrigeration system (what turns on or opens first when cooling is needed) • The role of a box thermostat versus a compressor control • How a solenoid valve and a thermal expansion valve (TXV) behave when the box calls for cooling

💭 Think About

• When the box temperature rises above the cut-in setting, which device receives the signal from the box thermostat directly? • Does the compressor start every time any one box warms up, or is there an intermediate step that controls refrigerant flow to that specific box? • Which component is more of a "flow control" device responding to pressure/temperature, and which is an "on/off" device responding to the thermostat?

✅ Before You Answer

• Identify which component is electrically controlled by the box thermostat in a multi-box system. • Confirm which action must happen before the compressor has a reason/load to run for that specific box. • Recall that the thermal expansion valve (TXV) usually responds to superheat/temperature at the evaporator outlet, not directly to the box thermostat.