Study 7 Type II: High-Pressure Appliances with 12 free online flashcards. Review key terms, definitions, and concepts with this interactive flashcard deck.
Which appliances does Type II certification cover?
Type II certification covers technicians servicing, repairing, maintaining, or disposing of medium-, high-, and very-high-pressure appliances, with specified exceptions for small appliances and vehicle air conditioners.
What defines a high-pressure appliance?
A high-pressure appliance uses a refrigerant with liquid-phase saturation pressure from 170 to 355 psia at 104∘F.
What makes an appliance very-high-pressure?
A very-high-pressure appliance uses a refrigerant with a critical temperature below 104∘F or saturation pressure above 355 psia at that temperature.
What does refrigerant recovery mean?
Recovering means removing refrigerant from an appliance and storing it. Recovery alone does not clean or reclaim the refrigerant.
When may system-dependent recovery equipment be used on a charge over 15 lb?
System-dependent recovery equipment cannot be used on an appliance with a full charge over 15 lb, unless the equipment is permanently attached as a pump-out unit.
What evacuation level applies below 200 lb for a high-pressure appliance?
For a high-pressure appliance charged with less than 200 lb, the required evacuation level is 0 in. Hg vacuum, regardless of the equipment’s manufacture date.
What vacuum level applies to a charge of at least 200 lb with newer equipment?
Use a vacuum level of 10 in. Hg for a high-pressure appliance charged with at least 200 lb when the recovery equipment was made or imported on or after November 15, 1993.
What vacuum level applies to a charge of at least 200 lb with older equipment?
Use a vacuum level of 4 in. Hg for a high-pressure appliance charged with at least 200 lb when the recovery equipment was made or imported before November 15, 1993.
What pressure is required before a qualifying non-major repair?
For a non-major repair not followed by evacuation of refrigerant to the environment, bring a high- or very-high-pressure appliance to 0 psig before opening it.
What gas should be used for pressure testing?
Use regulated nitrogen, with a pressure regulator and relief protection. Do not use oxygen or compressed air for pressure testing.
Which appliances are covered by the EPA leak-repair program?
It applies to appliances with a full charge of at least 50 lb of ozone-depleting refrigerant. It does not apply to appliances containing only substitute refrigerants.
What are the annualized leak-rate trigger percentages?
The annualized leak-rate trigger is 30% for industrial process refrigeration, 20% for commercial refrigeration, and 10% for comfort cooling and all other appliances.
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