5 Refrigerant Recovery and Practical Review

Recovery, recycling, and reclamation

Recovering, recycling, and reclaiming describe different levels of refrigerant handling. Recovery removes refrigerant from an appliance and stores it externally; it does not require cleaning or testing. Recycling cleans recovered refrigerant, typically by oil separation and filtration, for reuse. Reclamation reprocesses refrigerant to applicable purity specifications and verifies its quality using the prescribed analytical method.

For stationary equipment under Section 608, recycled refrigerant may be reused in equipment owned by the same person, but it does not meet the purity verification required for reclamation. Reclamation is performed by an EPA-certified reclaimer. In general, used refrigerant must be reclaimed before it is sold to a new owner. For example, refrigerant recovered from a customer’s system may be returned to that customer’s equipment as allowed by the rules, but it cannot simply be sold to another owner as usable refrigerant; it must first be reclaimed by an EPA-certified reclaimer.

Equipment and recovery workflow

Select and prepare equipment

Use recovery equipment certified for the applicable appliance and refrigerant. Requirements vary by appliance type, refrigerant, and equipment manufacture date, so check the certification and the manufacturer’s instructions. Equipment certification is not the same as technician certification.

Begin by identifying the refrigerant from the equipment label and assessing whether it is flammable or presents other special hazards. Do not mix refrigerants or put an unknown refrigerant into a cylinder containing a known refrigerant. Follow the equipment and refrigerant safety instructions. Provide ventilation, keep ignition sources away when required, and use appropriate eye and hand protection. Refrigerants can pose toxicity, flammability, asphyxiation, and physical hazards.

Inspect the recovery machine, hoses, and fittings to ensure they are rated for the refrigerant and task. Check the recovery cylinder’s identity, condition, rating, and available capacity. Follow the machine’s connection and operating instructions.

Recover and close out

Operate the recovery machine as directed. Use liquid or vapor recovery methods only where the equipment is designed for them, and do not vent refrigerant. For servicing or disposal, recover to the evacuation level required for the appliance and applicable rules; the required level depends on the appliance category and governing rules, so one target does not apply to every appliance.

Weigh the cylinder before and during recovery. Never exceed its rated gross weight or applicable fill limit, and leave room for liquid expansion. Use cylinder markings, applicable requirements, and equipment instructions rather than guessing from pressure alone. Overfilling can lead to refrigerant release or cylinder damage.

At closeout, close valves, prevent refrigerant trapped in hoses from being released, cap or protect connections as appropriate, and label the cylinder with its contents and condition. Send mixed, contaminated, or uncertain refrigerant through the appropriate recovery and reclaimer or disposal channel.

Recovery procedures and required evacuation levels depend on the appliance category and governing rules. Motor vehicle air conditioners (MVACs) are generally handled under Section 609 requirements, not the ordinary stationary-equipment workflow described here.

Recovery-cylinder handling

A recovery cylinder is a pressure vessel, not a disposable supply cylinder. Use only an approved cylinder intended for recovered refrigerant, compatible with the refrigerant, and in acceptable condition. Before filling, check its markings, tare weight, rated capacity, and any fill-control device. Use a scale and stop at the applicable maximum fill weight; never rely on feel or pressure alone.

Keep cylinders secured against falling, away from excessive heat, and in a ventilated location. Protect valves during movement and follow applicable transport requirements. Do not use a damaged, unmarked, or unsuitable cylinder. If the refrigerant is unknown or may be contaminated with flammable material, use equipment and a cylinder-management procedure specifically suited to that hazard; do not send it through ordinary recycling equipment.

Practical review scenarios

Recovered refrigerant and resale

Refrigerant recovered from a customer’s appliance cannot simply be sold to another customer, even if it is clean. For stationary equipment, used refrigerant generally must be reclaimed by an EPA-certified reclaimer before sale to a new owner. Recovered or recycled refrigerant may be reused within the same owner’s equipment as permitted.

A cylinder nearing its fill limit

Stop before the applicable fill limit is reached, even if the machine is still pulling refrigerant. Do not decide to continue based on cylinder pressure or appearance. Use a properly rated, compatible cylinder with verified capacity, then continue according to equipment instructions.

Unknown or potentially mixed contents

Do not add contents that are uncertain or may be mixed to a cylinder containing known refrigerant. Keep the refrigerant separate, label it clearly as unknown or potentially contaminated, and use an appropriate recovery and disposition process. Mixing makes identification, reuse, and reclamation more difficult and can create hazards.

Equipment suitability and a warm cylinder

A recovery machine is not acceptable merely because it connects to the hoses. It must be certified for the applicable use and suitable for that refrigerant; follow its manufacturer’s instructions and the appliance-specific evacuation requirements.

Do not release refrigerant to reduce pressure in a warm cylinder. Do not vent refrigerant. Keep the cylinder away from heat and follow safe handling procedures; if its condition appears unsafe, stop work and follow the site’s emergency procedure.

• Recycle

• Reclaim