Refrigerant Recovery Equipment Certification and Maintenance

Flashcards covering key concepts about refrigerant recovery equipment certification and maintenance practices.

Who must certify recovery equipment used during maintenance for small appliances that use CFCs, HCFCs, and HFCs?

An EPA-approved laboratory.

For which refrigeration appliances is it permissible to use a passive recovery device?

A domestic refrigerator.

Which recovery equipment maintenance practice should be performed regularly?

Check recovery equipment for refrigerant leaks.

Why should low and high side access valves be installed in a household refrigerator?

To prevent non-condensables contamination.

What is required when attaching a gauge set to check system pressures?

Have manual or self-sealing valves on the ends of the gauge set hoses to minimize any release of refrigerant.

When recovering CFC, HCFC, or HFC refrigerant into a non-pressurized container from a household refrigerator, what is required?

It is necessary to chase refrigerant from the oil with pressurized dry nitrogen.

When recovering R-410A, what should not happen with the refrigerant?

R-410A should be recovered and not mixed with oil.

What is the requirement when using a self-contained recovery device with an operating compressor?

Recover 80% of the nameplate charge.

What is the characteristic of a system dependent recovery?

Must use a pressurized recovery technique.

What is the approximate pressure of refrigerant that does not contain any refrigerant at 80°F?

72 psig.

What must be true regarding the refrigerant before filling a charging cylinder?

The refrigerant must be in a liquid state.

Which condition requires refrigerant recovery within the process?

When there is a leak in the system.