Chapters per page:
Form #: 620-79
This chapter covers the Refrigerant R-503. R-503 is an azeotropic mixture of R-23 and R-13 with improved properties for use in the medium low-temperature range (-100 to -150°F). It is normally used in reciprocating compressors as the second stage in cascade systems with R-502, R-12 or R-22 in the first stage. (620-79-Refrigerant-503)
Form #: 620-93
This chapter covers flammability studies with various mixtures of R-22 and air, with and without added oxygen. These mixtures can be flammable, and the possible hazards should be recognized. Some of these findings are summarized here.
Form #: 620-94
To assist equipment owners in the transition to non-ozone-depleting refrigerants, EPA has undertaken a "Cooling and Refrigerating Without CFCs" initiative. As part of this initiative, EPA is publishing case histories which describe equipment retrofits and replacements actually implemented by companies around the United States.
Form #: 620-95B
The purpose of this chapter is to provide HVAC/R service engineers and technicians with a ready source of reference, listing and explaining many of these designations.
Form #: 620-99
This chapter is an overview of non-fluorocarbon alternatives. The reproduction of this material is for reference and educational purposes only. Some of the subjects covered: hydrocarbons, ammonia, carbon dioxide, and Technologies other than Vapor Compression (such as: evaporative cooling, gas expansion, absorption, adsorption, stirling cycle, and air)
Form #: 650-001
What HFC refrigerant should you use to replace the
original R-22 refrigerant when servicing or repairing
an existing piece of equipment? This is one of the
major issues facing the typical HVACR contractor
today, whether the equipment in question is a selfcontained
rooftop package or a field-installed split
system. This document contains two specific “flow
diagrams” that have been formulated to assist
contractors and technicians with this vital decisionmaking
process. The refrigerants suggested in these
flow diagrams are typical choices that can be found
in most regions of North America. It is the procedure
and methodology that are of prime importance.
These flow diagrams can be used with most existing
installations, and pertain to both air conditioning and refrigeration applications.