Technical Information ART-37 DuPont Suva ® refrigerants Retrofit Guidelines for Suva HFC Refrigerants ® Suva® 134a for R-12 Retrofit Suva® HP62 and Suva® 507 for R-502 Retrofit Suva® HP62 and Suva® 507 for R-22 Retrofit The DuPont Oval Logo, DuPont™, The miracles of science™, and Suva® are trademarks or registered trademarks of E.I. du Pont de Nemours and Company.
Retrofit Guidelines for Suva® HFC Refrigerants Table of Contents Page Introduction ................................................................................................................ 1 R-12 Replacement Choices ..................................................................................... 1 R-502 Replacement Choices ................................................................................... 1 R-22 Replacement Choices ................................................................
Introduction • Suva® 407C (R-407C) is also an HFC retrofit option for R-502 in certain equipment. Refer to ART-34 “Retrofit Guidelines for Suva® 407C” for details. With the phaseout of CFCs and HCFCs, existing refrigeration and air-conditioning equipment operating with CFCs and HCFCs will ultimately need to be either replaced with new equipment or retrofitted with alternative refrigerants.
Important Safety Information Lubricant and Filter Drier Information ® Like CFCs, Suva refrigerants are safe when handled properly. However, any refrigerant can cause injury or even death when mishandled. Please review the following guidelines before using any refrigerant. • Do not work in high concentrations of refrigerant vapors. Always maintain adequate ventilation in the work area. Do not breathe vapors. Do not breathe lubricant mists from leaking systems.
In the United States, DuPont will take back for reclaim the Suva® refrigerants discussed in this bulletin. You should consult the original equipment manufacturer for recommendations concerning the compatibility of elastomers and plastics used in their system and the new refrigerant. Although many system components used with CFCs are also compatible with Suva® refrigerants, there are exceptions that, if not replaced, can cause refrigerant leakage or system failure.
operation of the system with the Suva® refrigerant. A System Data Sheet is included at the back of this document to record baseline data. Retrofit Summary for HFC Refrigerants Select the Retrofit Checklist from the Appendix for the refrigerant you are replacing. 1. Establish baseline performance with CFC/HCFC. 2. Drain mineral oil or alkylbenzene from the system and measure the volume removed. Leave the CFC refrigerant in the system.
5. Recover the CFC charge into a proper recovery cylinder. Use normal service practices. If the correct charge size is not known, weigh the amount of refrigerant recovered. heat, etc.). Attempting to charge until the sight glass is clear may result in overcharging the refrigerant. Please read “How to Determine Suction Pressure, Superheat and Subcool” on page 8. 6. Replace the filter/drier. It is routine practice to replace the filter/drier following system maintenance.
For best results: • It is recommended that the system be initially charged with about 75% by weight of the original charge. • Add the initial charge of Suva® refrigerant to the high-pressure side of the system (compressor not running) until the system and cylinder pressures equalize. Then connect to the low-pressure side of the system, start the compressor, and load the remainder of the refrigerant slowly to the suction side of the system.
of the system with the Suva® refrigerant. A System Data Sheet is included at the back of this document to record baseline data. from the refrigeration system, providing that enough time is allowed with each change to circulate oil through the entire system. 5. Recover the R-22 charge into a proper recovery cylinder. Use normal service practices. If the correct charge size is not known, weigh the amount of refrigerant recovered. 2.
• Head pressure controls • Crankcase pressure regulators • Others 9. Start up system, adjust charge size. Label system for the refrigerant and lubricant used. Start the system and let conditions stabilize. If the system is undercharged, add Suva® HP62 or Suva® 507 in small amounts (still removing liquid from the charging cylinder) until the system conditions reach the desired level.
Retrofit Checklist for Suva 134a, Suva® HP62, or Suva® 507 ® _____ 1. Establish baseline performance with R-12, R-502, or R-22. (See data sheet for recommended data.) _____ 2. Consult the original equipment manufacturer of the system components for recommendations on the following: • Plastics compatibility • Elastomers compatibility • Lubricant (viscosity, manufacturer) • Retrofit procedure to sustain warranty _____ 3.
System Data Sheet Type of System/Location: _________________________________________________________________________________________ Equipment Mfg.: _________________________________ Compressor Mfg.: _______________________________ Model No.: _________________________________ Model No.: _______________________________ Serial No.: _________________________________ Original Charge Size: _________________________________ Serial No.
Appendix Table 1 Pressure/Temperature Chart Suva® 134a/R-12 Saturation Properties SI Units English Units Pressure, psi 15* 10* 5* 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 110 120 130 140 150 165 180 195 210 225 240 255 270 285 300 R-12 HFC-134a Saturation Saturation Temperature, °F Temperature, °F –49 –38 –29 –22 –9 2 10 18 26 32 38 43 48 53 58 62 66 70 74 77 81 84 87 90 96 102 107 112 117 123 130 136 141 147 152 157 162 166 170 Pressure, kPa 25 50 75 100 125 150 175 200 225 250 275
Table 2 Pressure/Temperature Chart Suva® HP62/R-502 Saturation Properties English Units SI Units R-502 HP62 R-502 HP62 Pressure, Sat. Temp, Sat. Temp, Pressure Sat. Temp, Sat. Temp, kPa °C °C kPa °C °C R-502 HP62 R-502 HP62 Pressure, Sat. Temp, Sat. Temp, Pressure Sat. Temp, Sat.
Table 3 Pressure/Temperature Chart Suva® 507/R-502 Saturation Properties English Units SI Units R-502 507 R-502 507 Pressure, Sat. Temp, Sat. Temp, Pressure Sat. Temp, Sat. Temp, kPa °C °C kPa °C °C R-502 507 R-502 507 Pressure, Sat. Temp, Sat. Temp, Pressure Sat. Temp, Sat.
Table 4 Pressure/Temperature Chart Suva® HP62/R-22 Saturation Properties English Units SI Units R-22 HP62 R-22 HP62 Pressure, Sat. Temp, Sat. Temp, Pressure Sat. Temp, Sat. Temp, kPa °C °C kPa °C °C R-22 HP62 R-22 HP62 Pressure, Sat. Temp, Sat. Temp, Pressure Sat. Temp, Sat.
Table 5 Pressure/Temperature Chart Suva® 507/R-22 Saturation Properties English Units SI Units R-22 507 R-22 507 Pressure, Sat. Temp, Sat. Temp, Pressure Sat. Temp, Sat. Temp, kPa °C °C kPa °C °C R-22 507 R-22 507 Pressure, Sat. Temp, Sat. Temp, Pressure Sat. Temp, Sat.
Table 6 Suva® 134a (R-134a) Physical Properties Unit Suva® 134a (R-134a) R-12 °F °C –14.9 –26.1 –21.6 –29.8 psia kPa 96.61 666.1 94.51 651.6 Liquid Density at 77°F (25°C) lb/ft3 kg/m3 75.28 1,206 81.84 1,311 Density Sat’d Vapor at 77°F (25°C) lb/ft3 kg/m3 2.02 32.4 2.32 37.
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For Further Information: DuPont Fluorochemicals Wilmington, DE 19880-0711 (800) 235-SUVA www.suva.dupont.com Europe Japan DuPont de Nemours International S.A. 2 Chemin du Pavillon P.O. Box 50 CH-1218 Le Grand-Saconnex Geneva, Switzerland 41-22-717-5111 Mitsui DuPont Fluorochemicals Co., Ltd. Chiyoda Honsha Bldg. 5-18, 1-Chome Sarugakucho Chiyoda-Ku, Tokyo 101-0064 Japan 81-3-5281-5805 Canada DuPont Canada, Inc. P.O.
