Type II certification covers which equipment?
- Low-pressure centrifugal chillers and the purge units that are fitted to them
- Factory-sealed appliances that hold five pounds of refrigerant or less
- Motor vehicle air conditioners and the MVAC-like systems on farm equipment
- Medium-, high- and very high-pressure appliances other than small appliances and MVACs
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D. Medium-, high- and very high-pressure appliances other than small appliances and MVACs
Type II covers medium-, high- and very high-pressure appliances, except small appliances (Type I) and motor vehicle systems (Section 609). Low-pressure chillers fall under Type III.
Reference: 40 CFR 82.161
Under the current definitions in 40 CFR 82.152, an appliance charged with R-410A is classed as
- a low-pressure appliance
- a medium-pressure appliance
- a high-pressure appliance
- a very high-pressure appliance
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C. a high-pressure appliance
High-pressure appliances use refrigerants with a liquid saturation pressure between 170 and 355 psia at 104°F, and the rule lists R-410A and R-22 as examples. Very high-pressure covers refrigerants such as R-13 and R-23.
Reference: 40 CFR 82.152 (high-pressure appliance)
Which job is a 'major' repair under Section 608, so that the appliance must first be evacuated to the full required level?
- Replacing a pressure switch
- Replacing a Schrader valve core
- Replacing a filter-drier core
- Replacing the evaporator coil
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D. Replacing the evaporator coil
Major maintenance, service or repair involves removing the compressor, condenser, evaporator or an auxiliary heat exchange coil. Changing a switch, valve core or filter-drier is non-major.
Reference: 40 CFR 82.152 (major maintenance, service, or repair)