Safe Handling and Recovery of Refrigerants Flashcards

How often must refillable DOT recovery cylinders be hydrostatically tested?

Answer: Every 5 years

DOT requires recovery cylinders to be hydrostatically retested every five years, with the test date stamped on the cylinder.

What does it mean to 'recover' refrigerant under EPA Section 608?

Answer: To remove refrigerant in any condition from a system and store it in an external container without necessarily testing or processing it

Recovery simply means removing refrigerant from a system and storing it in an external container, without testing or processing it.

Which process requires refrigerant to meet AHRI Standard 700 purity specifications?

Answer: Reclamation

Reclamation processes refrigerant to new-product specifications per AHRI 700, verified by chemical analysis.

A technician needs to warm a recovery cylinder to speed up a transfer. Which method is acceptable?

Answer: Place it in warm water or use an approved heating blanket, keeping it below 125°F

Cylinders should never be heated with an open flame and should not exceed about 125°F to avoid dangerous pressure buildup.

Which statement about mixing different refrigerants in the same recovery cylinder is correct?

Answer: Refrigerants should not be mixed because the mixture may be impossible to reclaim

Mixed refrigerants often cannot be separated and reclaimed, and may have to be destroyed at significant cost.

Recovered refrigerant that has NOT been reclaimed may be charged back into which equipment?

Answer: The same system it came from or another system owned by the same owner

EPA allows recovered refrigerant to be returned to the same system or other equipment of the same owner without reclamation.

What is the main hazard of liquid refrigerant contacting a technician's skin?

Answer: Frostbite from rapid evaporation

Liquid refrigerant boils off at very low temperatures, rapidly absorbing heat from skin and causing frostbite.