Rules and procedures for servicing high-pressure refrigeration appliances such as residential central air systems, tested on the Type II certification.
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- What pressure threshold distinguishes high-pressure from low-pressure appliances?
- 150 psig at operating conditions
- What are two common high-pressure refrigerants in residential air conditioning?
- R-22 and R-410A
- What regulation established EPA 608 certification requirements?
- Section 608 of the Clean Air Act
- When did EPA require certification for all refrigerant handlers?
- November 14, 1994
- What must a technician possess before purchasing refrigerant?
- A valid EPA 608 certification
- Is intentionally venting high-pressure refrigerant to the atmosphere legal?
- No, it violates Section 608
- What must be recovered from an appliance before disposal?
- All refrigerant charge
- How long must recovery and recycling records be kept?
- Three years minimum
- What is the EPA recovery efficiency standard?
- 90 percent of the refrigerant charge
- What does HCFC stand for?
- Hydrochlorofluorocarbon
- Compare ozone depletion: CFCs versus HCFCs
- CFCs have higher ozone depletion potential than HCFCs
- What color is the cylinder for R-22 refrigerant?
- Green
- What color is the cylinder for R-410A refrigerant?
- Rose or pink
- What is the primary purpose of manifold gauges?
- Measure system pressure and temperature, and recover or evacuate refrigerant
- What vacuum pressure must be achieved when evacuating a high-pressure system?
- 500 microns of mercury absolute or lower
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