Before recovering from an unfamiliar system, why should the technician confirm which refrigerant it holds?
Recovery techniques · EPA 608 Core. The correct answer, and the reasoning behind it.
Keeping refrigerants unmixed and what affects recovery speed.
The question
Before recovering from an unfamiliar system, why should the technician confirm which refrigerant it holds?
- To pick the right cylinder and avoid mixingCorrect answer
- To decide whether the refrigerant may be vented
- To set the thermostat correctly
- To find the date the system was made
Why “To pick the right cylinder and avoid mixing” is correct
Each refrigerant should go into its own cylinder, so knowing the refrigerant first keeps it from being mixed with another. Check the nameplate and the system pressures before connecting.
Source: EPA: Test Topics
Why the other answers are wrong
- To decide whether the refrigerant may be vented — Non-exempt refrigerants may never be vented.
- To set the thermostat correctly — The thermostat setting has nothing to do with recovery.
- To find the date the system was made — The manufacture date is on the nameplate, but that is not the reason for identifying the refrigerant.
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