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 ..................................................................................... 1
Using HFCs versus Service Refrigerants ............................................................ 1
Important Safety Information ................................................................................. 2
Lubricant and Filter Drier Information ................................................................ 2
Lubricants .................................................................................................................. 2
Filter Drier .................................................................................................................. 2
General Retrofit Information ................................................................................... 2
System Modifications ................................................................................................ 2
Refrigerant Recovery Information ............................................................................. 3
What to Expect Following a Retrofit.......................................................................... 3
Retrofit Summary for HFC Refrigerants.................................................................... 4
Retrofit of R-12 Systems to Suva
®
134a ............................................................ 4
Retrofit of R-502 Systems to Suva
®
HP62 or Suva
®
507 ............................... 5
Retrofit of R-22 Systems to Suva
®
HP62 or Suva
®
507 ................................. 6
Pressure/Temperature Charts—Introduction ........................................................ 8
How to Read the Pressure/Temperature Charts ....................................................... 8
How to Determine Suction Pressure, Superheat, and Subcool................................. 8
Retrofit Checklist for Suva
®
134a, Suva
®
HP62, or Suva
®
507 ...................... 9
System Data Sheet ................................................................................................. 10
Appendix
Table 1. Pressure/Temperature Chart—Suva
®
134a/R-12..................................... 11
Table 2. Pressure/Temperature Chart—Suva
®
HP62/R-502.................................. 12
Table 3. Pressure/Temperature Chart—Suva
®
507/R-502..................................... 13
Table 4. Pressure/Temperature Chart—Suva
®
HP62/R-22.................................... 14
Table 5. Pressure/Temperature Chart—Suva
®
507/R-22....................................... 15
Table 6. Suva
®
134a Physical Properties ............................................................... 16
Table 7. Suva
®
HP62 and Suva
®
507 Physical Properties ..................................... 16
Table 8. Compositions of Suva
®
Refrigerants ........................................................ 16
DuPont Technical Assistance and Other Information ............................. back page
