Refrigerant cannot be recovered without isolating a parallel compressor system because of

Refrigerant cannot be recovered without isolating a parallel compressor system because of

• A. An open equalization connection
• B. A blocked discharge valve
• C. Moisture in the system
• D. Low ambient temperature

Answer: (A)

In a parallel compressor system, the compressors are linked by an equalization line that balances pressure between them. When you’re recovering refrigerant, that open equalization path would let refrigerant move between the connected compressors even as you try to pull it out with the recovery unit. The result is refrigerant that can bypass the recovery process and remain in the other part of the system, making complete recovery impossible. Isolating the parallel system closes that cross-flow path, ensuring the recovery unit can remove all refrigerant from the part you’re servicing and preventing interference from the other compressor circuit. The other options don’t describe the cross-flow issue that blocks full recovery in this setup.

In a parallel compressor system, the compressors are linked by an equalization line that balances pressure between them. When you’re recovering refrigerant, that open equalization path would let refrigerant move between the connected compressors even as you try to pull it out with the recovery unit. The result is refrigerant that can bypass the recovery process and remain in the other part of the system, making complete recovery impossible. Isolating the parallel system closes that cross-flow path, ensuring the recovery unit can remove all refrigerant from the part you’re servicing and preventing interference from the other compressor circuit. The other options don’t describe the cross-flow issue that blocks full recovery in this setup.