EPA 608 Certification Type I: Small Appliances Syllabus

Type I: Small Appliances syllabus — full chapter and topic list

Expand any chapter to see its topics and sub-topics. This is the whole examinable outline for Type I: Small Appliances in EPA 608 Certification, not a summary of it.

1. 1

   Definition and Scope of Small Appliances

   3 topics

   • Small Appliance Criteria
     • Factory-charged, fully sealed, hermetic systems
     • Charge of 5 pounds or less of refrigerant
     • Examples: refrigerators, window AC units, dehumidifiers, vending machines, water coolers
   • Common Refrigerants in Small Appliances (R-134a, R-12, R-22, R-600a)
   • Hermetically Sealed System Characteristics
2. 2

   Recovery Requirements for Small Appliances

   4 topics

   • Required Recovery Levels
     • 90 percent recovery with an operating compressor
     • 80 percent recovery with a non-operating compressor
   • System-Dependent (Passive) Recovery
     • Using the appliance's own compressor to aid recovery
     • Limitations when the compressor is inoperative
   • Self-Contained (Active) Recovery Equipment Use
   • Recovery Equipment Certification Dates for Small Appliances
3. 3

   Service and Repair Techniques

   4 topics

   • Accessing Sealed Systems
     • Saddle (piercing) valves and bolt-on access fittings
     • Brazed process tube access and proper sealing
   • Locating Leaks in Sealed Systems
   • System Evacuation, Dehydration, and Triple Evacuation Method
   • Recharging by Weight and Verifying Charge

Type I: Small Appliances flashcards for EPA 608 Certification

18 of 51 cards from the Type I: Small Appliances deck — real questions with worked answers.

1. How does the EPA define a "small appliance" under Section 608?

   A product fully manufactured, charged, and hermetically sealed in a factory with 5 pounds or less of refrigerant. Examples include refrigerators, freezers, room/window air conditioners, packaged terminal AC/heat pumps, dehumidifiers, vending machines, water coolers, and under-the-counter ice makers.

2. What is the maximum refrigerant charge a unit can contain and still qualify as a Type I small appliance?

   5 pounds (or less) of refrigerant.

3. List four common examples of products classified as Type I small appliances.

   Household refrigerators, household freezers, room (window) air conditioners, and packaged terminal air conditioners (PTACs). Others include dehumidifiers, water coolers, vending machines, and under-the-counter ice makers.

4. What does it mean that a small appliance is "hermetically sealed"?

   The complete refrigerant system, including the compressor and motor, is enclosed in a welded, gas-tight (airtight) housing at the factory with no service valves or access ports.

5. Why do hermetically sealed small appliances usually lack service ports or valves?

   Because they are factory-sealed with no intended field service of the refrigerant circuit. To recover or charge refrigerant, a technician must add an access fitting (e.g., a piercing or saddle valve) to the sealed system.

6. Which refrigerant is most common in modern household refrigerators and freezers?

   R-134a (an HFC), which replaced R-12 in domestic refrigeration.

7. Which refrigerant was historically used in older household refrigerators and freezers before being phased out?

   R-12 (a CFC).

8. Which refrigerant is commonly found in older room/window air conditioners covered under Type I?

   R-22 (an HCFC).

9. What is R-600a and where is it used in small appliances?

   R-600a is isobutane, a flammable (A3) hydrocarbon refrigerant used in many newer, energy-efficient household refrigerators and freezers.

10. Classify R-134a, R-12, R-22, and R-600a by refrigerant family.

    R-134a = HFC; R-12 = CFC; R-22 = HCFC; R-600a = hydrocarbon (isobutane).

11. What special safety concern applies when servicing appliances charged with R-600a (isobutane)?

    It is flammable, so recovery and service require explosion-proof/flammable-rated equipment, no ignition sources, and proper ventilation to prevent fire or explosion.

12. For small appliances manufactured BEFORE November 15, 1993, what recovery level must equipment achieve?

    Recover 80% of the refrigerant when the appliance's compressor is NOT operating (or to 4 inches of mercury vacuum).

13. For small appliances manufactured BEFORE November 15, 1993, if the compressor is operating, what recovery level applies?

    90% of the refrigerant must be recovered when using recovery equipment with the unit's compressor running.

14. For small appliances manufactured ON OR AFTER November 15, 1993, what recovery level/vacuum must equipment achieve?

    90% of the refrigerant with the compressor operating, or 80% with a non-operating compressor; equivalently, recovery to 4 inches of mercury vacuum (4 in. Hg).

15. What vacuum level represents the required recovery standard for small appliances?

    4 inches of mercury (4 in. Hg) vacuum.

16. What is the key date dividing the two recovery-efficiency requirements for small appliances?

    November 15, 1993 — appliances built before vs. on/after this date have different recovery percentage requirements.

17. What is system-dependent (passive) recovery?

    A recovery method that relies on the appliance's own internal pressure and/or its compressor to push refrigerant out into a recovery cylinder or device, rather than using a self-powered recovery machine's pump.

18. In passive (system-dependent) recovery, what provides the force that moves the refrigerant out?

    The appliance itself — its internal system pressure and, when it runs, its own compressor — drives the refrigerant into the recovery container.

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