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Answer :
Final answer:
The pressure or vacuum in a small appliance refrigeration system about to be opened for repair should be brought to a value of 4 inches Hg vacuum.
Explanation:
The pressure or vacuum in a small appliance refrigeration system about to be opened for repair should be brought to a value of 4 inches Hg vacuum.
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Final answer:
The correct pressure or vacuum value that a small appliance refrigeration system should be brought to before repair is 1 to 2 psig (Option c).
Explanation:
The correct answer is c. 1 to 2 psig. When a small appliance refrigeration system is about to be opened for repair, the pressure or vacuum should be brought to a value of 1 to 2 pounds per square inch gauge (psig). This is to ensure that the system is at a safe pressure level and prevent any accidents or damage during the repair process.
When preparing to open a small appliance refrigeration system for repair, it's important to ensure that the system pressure or vacuum is brought to a safe level using a recovery device. This process ensures no refrigerant is released into the atmosphere, which could be harmful to both the environment and individuals nearby. Ideally, the system should be brought to a pressure that is close to atmospheric pressure to avoid the risk of contamination or the release of refrigerant.
Since 14.7 psia (pounds per square inch absolute) is standard atmospheric pressure at sea level, and recovery or vacuum devices are designed to work with pressures relative to atmospheric pressure, it would make sense to bring the system pressure close to atmospheric when opening the system for repairs. However, the exact value to which you should bring the pressure or vacuum in the refrigeration system for safety and environmental compliance may be specified by local regulations, the manufacturer, or the particular recovery device used.
Hence, the answer is option c.
