[W126 Coupe] Refrigerant Pressure

[Jason Mavris]

For R134A Systems Here is a Pressure Chart: 


Ambient Temp (F)   Low Side Gauge (PSI)     High Side Gauge (PSI)
65                            25-35                                135-155
70                            35-40                                145-160
75                            35-45                                150-170
80                            40-50                                225-250
85                            45-55                                250-270
90                            45-55                                275-300
100                          50-55                                315-325


Note:Ambient Temp chart is for air under hood. 



Hope this helps, and yes 134A is 80% of charge from  R12.  

Jason
  ----- Original Message ----- 
  From: Jay Manek 
  To: Mercedes Coupes Mailing Lists 
  Sent: Friday, June 13, 2008 1:11 PM
  Subject: [W126 Coupe] Refrigerant Pressure


  My A/C has been converted to R134a..

  does anyone know the correct amount of gas that needs to go in?

  Thanks


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