EPA Section 608 Universal Certification ExamType I (Small Appliances)Medium
A technician is using a system-dependent recovery device on a small appliance with an operating compressor. Which of the following best describes how the compressor assists in the recovery process?
- AThe compressor moves refrigerant from the low-side to the high-side, facilitating recovery from the high-side.
- BThe compressor heats the refrigerant, increasing its vapor pressure for faster recovery.
- CThe compressor creates a vacuum in the recovery cylinder, drawing refrigerant in.
- DThe compressor pressurizes the recovery cylinder, forcing refrigerant out.
Show answer & explanationAnswer & explanation
Correct answer: A. The compressor moves refrigerant from the low-side to the high-side, facilitating recovery from the high-side.
When the compressor is operating, it moves refrigerant from the low-pressure side of the system to the high-pressure side. This allows the technician to recover refrigerant more efficiently from the high-side, as the compressor effectively 'pumps' it out of the system.
Why the other options are wrong
- B. While compression generates some heat, its primary role in recovery is to move refrigerant, not just heat it.
- C. The compressor creates a pressure differential within the appliance, not a vacuum in the recovery cylinder.
- D. The compressor's primary role is within the appliance, not directly pressurizing the recovery cylinder.
Compressor-Assisted Recovery (Small Appliance)
In system-dependent recovery from a small appliance with an operating compressor, the compressor helps by moving refrigerant from the low-pressure side to the high-pressure side, making recovery from the high-side more efficient.
- Applies to system-dependent recovery.
- Only when the appliance's compressor is functional.
- Utilizes the compressor's normal pumping action.
- Recovery often performed from the high-side after compressor operation.
Memory trick: The compressor's pump makes it jump from low to high!