Under conditions of ARI 740, what capability must self-contained recovery equipment for small appliances have regarding vacuum evacuation?

• A. To evacuate to 2” Hg vacuum
• B. To evacuate to 4” Hg vacuum
• C. To evacuate to 8” Hg vacuum
• D. To evacuate to 10” Hg vacuum

Answer: (B)

Self-contained recovery equipment for small appliances must be capable of evacuating to a 4" Hg vacuum under the conditions specified by ARI 740. This standard ensures that the equipment is effective in removing refrigerants from small appliances, allowing for proper recovery without releasing harmful substances into the environment. Achieving a 4" Hg vacuum is crucial as it enables the thorough removal of moisture and refrigerants, ensuring that the system is adequately prepared for servicing or repair. This capability is essential for compliance with EPA regulations aimed at minimizing environmental impact and improving the efficiency of the recovery processes.