Because R-410A operates at considerably higher pressures than many other refrigerants, newly-manufactured R-410A systems require service professionals to use different tools and equipment. This guide explains why R-22 systems cannot be retrofitted to R-410A, why R-410A operates at considerably higher pressures, and why each component in an R-410A system must meet the stringent demands of this newer refrigerant. Study guide prepares technicians for a certification exam (available separately). Call Refrigeration Service Engineers Society (RSES) at 1-800-297-5660 for more details on examinations in your area. Developed by the AC&R Safety Coalition, of which RSES is a founding member. Soft cover, 8.5 X 11.

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