Section
5
Sealed System
5
-2
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R-410A is incompatible with R-22 refrigerant. R-410A is used at much higher operating pressures than
R-22 and other newer refrigerants.
Vapor pressures are typically as follows: 215.3 psi @ 70° F low side and 490.2 psi @ 130° F high side.
R-410A designed systems employ thicker walled tubing, and compressors capable of withstanding the
higher pressures of R-410A. R-410A systems require different installation and service procedures.
R-410A should only be used in equipment specifically designed and constructed for higher pressure
refrigerants.
R-410A needs service personnel to understand why all refrigerant flow controls, valves and driers have
changed and must be properly applied with newly designed and built compressors.
Filter-driers used with R-22 refrigerants are not compatible with an R-410A sealed system. When
installing or replacing a filter-drier in an R-410A system, make sure the replacement filter-drier is
specifically designed for R-410A refrigerant systems.
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New equipment that uses R-410A will require service personnel to acquire different tools and equipment, safety
standards and fundamentals when repairing systems in the field.
R-410A operates at considerably higher pressures and requires the use of special tanks, gauges and recovery
equipment.
Servicers will need to have dedicated equipment as listed:
R-410A - Manifold
Servicers will need to have accommodating equipment as listed:
R-410A - Recovery equipment
R-410A - Leak Detector
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For further information concerning section 608 of the Clean Air Act, or any other issue related to stratospheric ozone
protection, please call the Stratospheric Ozone Information Hotline at (800) 296-1996.
Phase-out schedule in the U.S.
http://www.epa.gov/ozone/title6/phaseout/hcfcfaqs.html
Material safety Data Sheet
http://www.honeywell.com/sites/docs/doc19194b8-fb3ebe9312-3e3e4447ab3472a0c2a5e5fdc1e6517d.pdf
Myths about R-410A
http://www51.honeywell.com/sm/410a/myths.html
Definitions of Section 608 Terms
http://www.epa.gov/ozone/title6/608/608defns.html#technician
Complying With The Section 608 Refrigerant Recycling Rule
http://www.epa.gov/ozone/title6/608/608fact.html#techcert
Overview of EPA Certification Test
http://www.epa.gov/ozone/title6/608/technicians/certoutl.html
Section 608 Technician Certification Programs
http://www.epa.gov/ozone/title6/608/technicians/608certs.html
