8.2 Type I Recovery Requirements

The Two Recovery Targets You Must Memorize

The single most-tested fact in Type I is the recovery requirement, and it has a moving part: the required percentage depends on whether the appliance's own compressor still works. Get this pair locked in cold.

The logic is intuitive: a working compressor helps push refrigerant out, so the EPA expects a higher capture rate. A dead compressor traps refrigerant in oil and is harder to evacuate, so the standard drops to 80%. The 4-inch Hg vacuum alternative applies to both cases — if you can pull the small appliance down to 4 inches of mercury vacuum, you have met the requirement no matter the compressor status.

Two Families of Recovery Equipment

Type I recognizes two equipment categories, and the exam expects you to tell them apart.

System-Dependent (Passive) Recovery

System-dependent recovery equipment "requires the assistance of components contained in an appliance to remove the refrigerant." It has no compressor of its own — it borrows the appliance's compressor or simply relies on a pressure differential. Two key limits:

• It is prohibited on appliances containing more than 15 lbs of refrigerant. (Small appliances are always under 5 lbs, so passive equipment is always legal on them — but the 15-lb cap is a favorite exam trap.)
• When the appliance compressor still runs, you must operate that compressor during recovery to move refrigerant toward the high side where the recovery device captures it.

Self-Contained (Active) Recovery

Self-contained recovery equipment has its own compressor and actively pulls refrigerant from the appliance. It works whether or not the appliance compressor is alive, and it is generally faster and more thorough. It is the only practical choice when the appliance compressor is burned out.

Accessing a Sealed System

Small appliances usually have no service valve, so you must create an access point. Three options:

1. Process tube — the crimped stub left from manufacturing; open it by piercing or cutting.
2. Line-tap (piercing/saddle) valve — clamps onto the line and pierces it to create a port.
3. Schrader valve — if one is present, it is a standard connection.

After recovery, any pierced opening must be sealed permanently (soldered, brazed, or capped). A line-tap valve is only a temporary access port and is not a permanent seal.

Freeing Refrigerant Trapped in Oil

When the compressor is dead and you are using passive recovery, refrigerant dissolves into the compressor oil (it is miscible with oil) and resists capture. EPA-recognized techniques to release it:

• Apply heat to the compressor shell with a heating blanket or heat gun — never an open flame. Warm oil holds less dissolved refrigerant, so it boils off and can be recovered.
• Sharply strike / tap the compressor with a rubber mallet to agitate the oil and shake refrigerant loose.
• Allow extra time for refrigerant to migrate out, and run the recovery device in repeated short cycles to pull additional trapped charge.

Example: A dehumidifier with a seized compressor needs its R-410A recovered before disposal. You attach self-contained recovery gear through a line-tap valve and pull, but the gauge stalls before 80%. You wrap the compressor shell in a heating blanket and tap the base with a rubber mallet. The warmed oil releases its dissolved refrigerant, the recovery resumes, and you finish by pulling the unit to a 4-inch Hg vacuum — satisfying the requirement for a non-functional compressor.

Recovery Before Disposal

No small appliance may be discarded with refrigerant still inside. The refrigerant must be recovered first, and the last person in the disposal chain is responsible for ensuring it happened. A scrap dealer who accepts refrigerant-containing appliances must either have a certified technician recover the charge or obtain documentation that recovery was already done. Keep your recovery record with the unit through the chain.

Reading the Requirement Correctly on Exam Day

Many Type I questions pair a scenario with a number and ask you to pick the right recovery target. Train yourself to do three things in order: first decide whether the appliance is a small appliance at all, then ask whether the compressor is functional to set the 90% vs. 80% target, and finally remember that a 4-inch Hg vacuum satisfies either case.

Watch the distractors. A common one swaps in a 10-inch or 15-inch Hg vacuum — those belong to Type II high-pressure recovery, not Type I. Another pushes 100% recovery; the regulation never requires 100%. Keeping the three Type I numbers — 90%, 80%, and 4 inches Hg — separate from the larger-system numbers is what separates a pass from a near-miss on this section.

Finally, note that the equipment itself must be EPA-certified recovery equipment and properly maintained. Using uncertified gear, or venting any portion of the charge rather than recovering it, is a violation regardless of how small the appliance is — even a few ounces of refrigerant must be captured.