3 Refrigerant Recovery Procedures Free Online FlashCards

What does refrigerant recovery do?

Recovery removes refrigerant from an appliance and stores it in an external container; it does not necessarily clean or test the refrigerant.

What equipment should be used for recovery?

Use recovery equipment compatible with the refrigerant and appliance, and set it up according to the manufacturer’s instructions.

How should unknown or possibly contaminated refrigerant be handled?

Do not mix it with known refrigerant. Use a suitable dedicated recovery arrangement or consult a qualified service provider.

What makes a recovery cylinder suitable?

Use an approved cylinder rated for the refrigerant’s pressure. Check its condition and fill limits; never overfill it or mix refrigerants in it.

Why monitor cylinder weight as well as system pressure?

Monitor both. System pressure does not reveal how much refrigerant entered the cylinder, so use a scale and stop before its allowable fill weight.

What characterizes vapor recovery?

Vapor recovery removes refrigerant as vapor. It is common for completing recovery and works with most recovery units.

What key precaution applies to liquid recovery?

Liquid recovery can remove a large charge more quickly when the setup allows it. Prevent liquid from entering a compressor not designed to handle it.

What limitation does push-pull recovery have?

It uses vapor pressure to move bulk liquid to the recovery cylinder and may speed recovery, but it leaves refrigerant behind; finish with vapor recovery.

What gases must never be used to pressurize or test a refrigerant system?

Never use oxygen or compressed air to pressurize or test a refrigerant system.

What precautions apply where refrigerants may be flammable?

Work in a ventilated area, keep ignition sources away where refrigerants may be flammable, and use the specified protective equipment and safety procedures.

Why recheck pressure after it stabilizes?

Pressure can rise as refrigerant boils off or migrates from oil or cooler parts. Continue recovery as appropriate and recheck the pressure.

How do recovered, recycled, and reclaimed refrigerant differ?

Recovered refrigerant is removed and stored; recycled refrigerant is cleaned for reuse under applicable conditions; reclaimed refrigerant is reprocessed and verified to required purity specifications.