What performance standard must modern recovery devices meet when recovering refrigerant from small appliances?

Prepare for the HVAC EPA Type I Test. Study with flashcards and multiple choice questions, each with hints and explanations. Get ready to excel in your exam!

Multiple Choice

What performance standard must modern recovery devices meet when recovering refrigerant from small appliances?

Modern recovery devices for small appliances are governed by ARI 740-1993, which sets a specific recovery efficiency as the standard. They must recover at least 90% of the refrigerant in the system, and this is measured either while the compressor is operating or when a 4-inch vacuum is achieved. This ensures most of the refrigerant is captured and returned for recycling, which is especially important given the small charge sizes in these appliances. The 4-inch vacuum condition provides a practical verification path if the compressor isn’t running. Higher recovery percentages (like 95% or 99%) or other vacuum thresholds (such as 3 inches) aren’t the mandated standard, which is why the stated 90% with the compressor-on or 4-inch vacuum condition is the correct criterion.

Modern recovery devices for small appliances are governed by ARI 740-1993, which sets a specific recovery efficiency as the standard. They must recover at least 90% of the refrigerant in the system, and this is measured either while the compressor is operating or when a 4-inch vacuum is achieved. This ensures most of the refrigerant is captured and returned for recycling, which is especially important given the small charge sizes in these appliances. The 4-inch vacuum condition provides a practical verification path if the compressor isn’t running. Higher recovery percentages (like 95% or 99%) or other vacuum thresholds (such as 3 inches) aren’t the mandated standard, which is why the stated 90% with the compressor-on or 4-inch vacuum condition is the correct criterion.

More practice questions