EPA 608 Type II case studies
EPA 608 Type II · Put your knowledge to work in context.
EPA Section 608 Type II is one of the technician certification tracks created under Section 608 of the Clean Air Act and the regulations at 40 CFR Part 82, Subpart F. Under those rules, technicians who maintain, service, repair, or dispose of equipment that could release ozone-depleting refrigerants into the atmosphere must be certified, and since January 1, 2018 that requirement also applies to appliances containing most substitute refrigerants, including HFCs. The EPA 608 Type II case studies are 5 cases and about 3,551 words.
1The 22% Rack: Leak Rate Math and the 30-Day Clock
Service records for a 1,400 lb R-404A supermarket rack installed in 2011 show 310 lb of refrigerant added during the past 12 months across four calls. Today a technician confirms a leaking suction header gasket and an oil-stained flare on the liquid line.
669 words, about 3 min25 in Hg Is Not 15: Recovery Level on a 275 lb Chiller
A 2004 centrifugal chiller with a 275 lb R-134a charge needs its compressor replaced; the machine still runs but is noisy. Outdoor ambient is 40°F and the machine room is unheated.
763 words, about 4 min31,500 Microns and a Vapor Charge: Two Mistakes on One Freezer
A 120 lb R-404A walk-in freezer rack had its evaporator replaced. The technician triple-evacuated with dry nitrogen sweeps and pulled the system to 1,500 microns, isolated the pump for five minutes, saw the reading hold, and broke vacuum.
710 words, about 4 min448 lb of R-22, Three Sources, One Buyer
A contractor's recovery cylinder is labeled R-22 and holds 48 lb drawn from three jobs: a clean residential split, a commercial unit with a burned-out compressor and a positive acid test, and a system where a previous company injected leak sealant. A helper also found an unlabeled cylinder next to it containing what appears to be R-410A.
668 words, about 3 min5Seized Compressor: The 0 psig Exception and Hot-Work Safety
A 1996 process chiller with a 190 lb R-22 charge has a seized compressor that will not turn. The machine room is indoors, and the unit must be opened for a compressor replacement and a braze repair on the discharge line.
741 words, about 4 min