5.2 Type I Recovery Requirements

Type I Recovery Requirements

Once a technician has classified an appliance as a Type I small appliance and confirmed it was manufactured after November 15, 1993, the next question is: how much refrigerant must actually be recovered before the sealed system can be opened, disposed of, or sent for disposal? EPA Section 608 answers that question with a standard built around one variable — whether the compressor is operating or not.

The 90% / 80% / 4-in.-Hg Standard

For a small appliance manufactured after November 15, 1993, a technician must do ONE of the following before the appliance can be serviced further or discarded:

The distinction between an operating and a non-operating compressor exists because compressor condition directly affects how completely refrigerant can be pulled from the sealed system. A functioning compressor can help move refrigerant toward a recovery device, supporting a higher 90% target. Once the compressor stops functioning, recovery becomes fully dependent on external equipment (passive migration or a self-contained pump), which is why the rule accepts a somewhat lower 80% target — or the 4 in. Hg vacuum alternative — for that scenario.

Notice that the standard gives a technician two ways to satisfy the requirement: hit the applicable percentage using an appropriate recovery method, or pull the system down to 4 in. Hg vacuum, whichever is achievable and verifiable with the equipment on hand. The 4 in. Hg vacuum alternative exists because, on some small appliances, verifying an exact recovered percentage is harder than simply confirming the vacuum level on a gauge.

Equipment manufactured on or before November 15, 1993 is grandfathered to a less stringent recovery standard than the 90%/80%/4-in.-Hg figures above — but as covered in 5.1, the manufacture date must be confirmed before assuming which standard applies.

What "Operative" Actually Means

An operative compressor is one that runs and is capable of pumping refrigerant through the system — it does not have to be running perfectly or efficiently, only capable of moving refrigerant. A compressor that hums but is mechanically seized, or one that has no electrical continuity and will not start at all, is inoperative for the purposes of this rule. A technician who is unsure whether a compressor qualifies as operative should attempt to start it under normal conditions before deciding which recovery percentage applies and which category of recovery equipment can legally be used. Guessing in either direction carries real consequences: assuming a marginal compressor is operative when it truly is not can lead a technician to rely on system-dependent equipment that never moves any refrigerant, while assuming an operative compressor is inoperative can lead to needlessly settling for the lower 80% recovery figure when 90% was achievable and required.

Confirming Recovery in the Field

In practice, technicians confirm they have met the recovery standard in one of two ways: by tracking the weight of refrigerant pulled into the recovery cylinder against the appliance's nameplate charge (to estimate the recovered percentage), or by watching the system gauge fall to the 4 in. Hg vacuum alternative and holding there once the recovery machine is isolated. Whichever method is used, the goal is the same — leave as little refrigerant as legally and practically possible inside the sealed system before it is opened, repaired, or scrapped.

System-Dependent Recovery Equipment: The Operative-Compressor Rule

System-dependent recovery equipment is recovery equipment that relies on the appliance's own compressor to pump refrigerant out of the sealed system and into a recovery container — the compressor itself does the work of moving the refrigerant. Because of that design, system-dependent equipment has one hard limitation tested repeatedly on the exam:

System-dependent recovery equipment may only be used when the small appliance's compressor is operative.

If the compressor is not operating — burned out, electrically dead, mechanically seized, or otherwise non-functional — a system-dependent device has nothing to pump with, and it cannot be used to recover refrigerant from that appliance. In that situation, the technician must switch to one of two alternatives:

• A passive recovery device, which relies on the refrigerant's own vapor pressure to migrate out of the sealed system (no compressor or pump involved), or
• Self-contained recovery equipment, which supplies its own compressor or pump external to the appliance being serviced.

This is the direct link between the compressor-condition table above and the recovery technique a technician is legally allowed to choose: an inoperative compressor doesn't just lower the required recovery percentage from 90% to 80% — it also removes system-dependent equipment from the list of legal options entirely. The choice between system-dependent, passive, and self-contained recovery equipment is covered in depth in the next section, but the operative-compressor rule above is the gate that decides whether system-dependent equipment is even on the table for a given job.