In a direct expansion type multi-box...

Question 1 / 270705eccef9dbacbc34ba4d46036

Question 1 of 270705eccef9dbacbc34ba4d46036

In a direct expansion type multi-box refrigeration system, the compressor is set up to cycle on and off by the action of what device?

Back

Question 1 of 27070

In a direct expansion type multi-box refrigeration system, the compressor is set up to cycle on and off by the action of what device?

🔍 Key Concepts

• Direct expansion refrigeration system control sequence • Difference between pressure-operated and temperature-operated controls • What actually starts and stops the compressor motor in multi-box systems

💭 Think About

• Ask which device actually senses suction or discharge conditions and opens/closes an electrical circuit to the compressor motor. • Consider which components are used mainly for refrigerant flow control and which are used primarily for safety protection or on/off cycling. • Think about what happens to suction pressure when the boxes reach their set temperature and how that affects the compressor.

✅ Before You Answer

• Identify which choice is a motor control safety vs a flow control valve. • Determine which device responds directly to low side (suction) pressure in a direct expansion system. • Verify which device is normally wired into the compressor starter circuit for automatic cycling.

Question 1 of 27070

In a direct expansion type multi-box refrigeration system, the compressor is set up to cycle on and off by the action of what device?

thermostatic expansion valve

high pressure cutout

king solenoid valve

low pressure cutout switch