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Must be recovered
Must be recovered
Must be recovered
the tank may explode
When there is a large volume of non-condensable gas in the refrigerant being recovered.
The main difference is the valve.
About 30 minutes
You will need a set of refrigerant gauges, a tank of refrigerant and a refrigerant scale. You will also know technical knowledge of superheat and subcool and be EPA certified.
The PAG oil gets injected through the same schrader valves the refrigerant is charged into and recovered from.
15 minutes
10 years
If you used a recovery equipment to recover CFC-12, you need to separate the lubricant from the recovered refrigerant.