Question

To change the compressor on a system containing 40 pounds R-500, using a recycling machine that was manufactured AFTER November 15, 1993, you must isolate the compressor then: ______________.

a) Simply remove the compressor
b) evacuate the isolated section of the system to atmospheric pressure, then remove the compressor
c) evacuate the isolated section of the system to 10 inches of vacuum and hold. If system pressure does not rise, remove the compressor
d) evacuate the isolated section of the system to 15 inches of vacuum and hold. If system pressure does not rise, remove the compressor

Answer 1

To safely change a compressor on a system with R-500 refrigerant using a modern recycling machine, evacuate the isolated section to 15 inches of vacuum and check for pressure rise before removal.

Step-by-step explanation:

When changing the compressor on a system containing 40 pounds R-500, using a recycling machine that was manufactured after November 15, 1993, it is necessary to first isolate the compressor. After that, you should then evacuate the isolated section of the system to 15 inches of vacuum and hold it. If the system pressure does not rise, you can safely remove the compressor. This is to ensure no refrigerant is released to the atmosphere, complying with environmental regulations and maintaining system integrity.