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How can you speed up the removal of the refrigerant charge from system?
Cooling the recovery cylinder to lower its pressure.
How long must an HVAC servicing company keep records for each disposed appliance
with a charge between 5 and 50 lbs?
3 years (Both answers)
Recovered refrigerant may contain which of the following impurities?
Acids, Moisture, and Oil
What area of a refrigeration system does oil foaming usually occur?
Compressor
What is a deep vacuum usually measured in?
Microns
What is the primary water source for a water cooled recovery unit condensing coil?
Local municipal water supply
What is the state of the refrigerant leaving the receiver in a refrigeration system?
High pressure liquid
What should be done after reaching the required recovery vacuum on an appliance?
Wait for at least a few minutes to see if the system pressure rises.
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