The mission of RSES in developing this training is to assist the refrigeration technician in understanding the requirements of safely maintaining and servicing systems that utilize those flammable refrigerants currently approved under the EPA’s SNAP program.
There are additional flammable refrigerants that may be approved in the future (e.g., R-1234yf). This training document will be updated (and additional testing and certificates will be required) as new refrigerants are approved.
Note: Portions of this document are excerpted and adapted from materials generously provided by Tecumseh Products Company and by Unilever. Reprinted with permission.
RSES highly recommends only experienced refrigeration professionals handle HCs. You should already have a solid understanding of the refrigeration cycle and proper handling of CFC, HCFC and HFC refrigerants.
INTRODUCTION TO HYDROCARBON REFRIGERANTS
Applications and availability
Approved HC refrigerants
REGULATIONS AND STANDARDS
Restricted uses and applications
Material safety data sheets
GHS hazard communication labeling
Combustible gas monitors
Handling refrigerant cylinders
HC refrigerant cylinders
Brazing and silver soldering
COMPRESSOR TERMINAL VENTING
Hazards from terminal venting
Protective terminal covers
COMPRESSOR CHANGE-OUT (DEFECTIVE COMPRESSOR)
Sealing the process tube
SYSTEM FLUSHING, PURGING, AND PRESSURE-TESTING FOR LEAKS
PROPER EVACUATION TECHNIQUES
During system evacuation
During system charging
SERVICE PROCEDURES, MAINTENANCE, AND
Previously modified systems
THE REFRIGERATION CYCLE
Definition of terms
Superheat for refrigeration applications
Subcooling for refrigeration applications
SUBSTITUTES SUBJECT TO USE RESTRICTIONS
EPA-approved refrigerants and applications (effective April 10, 2015)
EPA-approved refrigerants and applications (effective January 3, 2017)
MAXIMUM DESIGN CHARGE SIZES:
TABLES A THROUGH E
TEMPERATURE-PRESSURE CHARTS FOR
TEMPERATURE CONVERSION TABLE
PRESSURE CONVERSION TABLE
No material may be returned for credit without prior permission and shipping instructions from RSES Headquarters. Contact 1-800-297-5660 Monday-Friday 8:30 AM - 5:00 PM (CST).
Books, Manuals and Merchandise:
Materials returned after 30 days from original shipment, and with permission, will be subject to a 15% restocking charge. Materials returned after 60 days are subject to a 50% restocking charge. No material will be accepted for return after 90 days from the original shipping date.
CDs and DVDs:
CDs and DVDs are non-returnable once the original carton/package seal has been broken. (Certain exceptions apply. Call with questions).