EPA EPA System Recovery and Evacuation Procedures 2

Question 1

What is the minimum required evacuation level (in microns) for most commercial refrigeration systems before recharging?

Accepted Answer

500 microns

Answer

Industry best practice and most equipment manufacturer specifications require evacuation to 500 microns or lower before charging a commercial refrigeration system.

Question 2

What type of recovery equipment is required when recovering refrigerant from large appliances (systems over 5 lbs)?

Accepted Answer

A certified recovery machine with ARI-740 certification

Answer

EPA regulations require that recovery equipment for systems containing more than 5 lbs of refrigerant meet ARI Standard 740 performance requirements.

Question 3

What color are DOT-approved refrigerant recovery cylinders?

Accepted Answer

Gray with a yellow top

Answer

DOT-approved refrigerant recovery cylinders are gray with a yellow top, distinguishing them from new refrigerant cylinders which are color-coded by refrigerant type.

Question 4

What is the maximum fill level (by weight) allowed for recovery cylinders?

Accepted Answer

80% of the cylinder's rated capacity

Answer

Recovery cylinders must never be filled beyond 80% of their rated capacity by weight to allow for thermal expansion of liquid refrigerant.

Question 5

Which condition requires a technician to use a recovery machine rather than pushing refrigerant to the high side for recovery?

Accepted Answer

When the system has a failed compressor

Answer

When a system compressor has failed, an external recovery machine is required because the system cannot use its own compressor to transfer refrigerant.

EPA - Environmental Protection Agency Universal Certification Practice Test

EPA - Environmental Protection Agency Universal Certification Practice Test

EPA EPA System Recovery and Evacuation Procedures 2