Wayne's Brain™ - AC Analyzer version 1.2.25
Enter and adjust the parameters in the blue boxes. Click the "Analyze" button and scroll down for the results.
          Outdoor Air °F       Refrigerant / System SEER     Indoor Return Air °F ID Supply Air °F              
            DB WB                
         
     
     
    high pressure source ┌─────┐ Vapor Line °F    
╔ ══∏═ ══ ╡            │ Suction Line °F   ╔ ════∏═ ══════════════ ╗  
╚ ════════════ ╗ │            ╞ ═══ ═══ ═╗║   ╔ ═════════════ ╝  
╔ ══Condenser══ ╝ │             │ ┌║║─┐     ╚ ══Evaporator══ ╗  
╚ ═ ══ ╗ │             │ │║   ║  │     ╔ ══ ══ ╝  
  ╔ ═══ ════ ╝ │             │ │╚═╝  │     ╚ ════ ════ ╗  
      ╚ ══ -14~500psig ═══ ╗ ┌──▬──┐  └────┘ 
Accumulator 		╔ ═══ -14~500psig ═══ ╝  
  ╔ ═════════════ ╝ Compressor ╚ ═════════════ ╗ (for TXV use)  
  ║         Liquid Line °F       ___   ║  
      ╚ ════════════════════∏═ ═══════════════════════ ═| |═  or  ═◙═ ═══ ╝  
       
     
 
 
     
Evaporator Superheat     OD dry bulb, and ID wet bulb temperatures are needed to determine the Target SH  
Condenser Subcooling     Normal fixed orifice subcooling for 13 seer and up is 0 - 20°  
Evaporator Saturation Temperature     Normal evaporator saturation temperature is 25 - 40° below return air dry bulb  
Condenser Saturation Temperature     Normal condenser saturation temperature for 13 seer and up is 10 - 20° over ambient  
Compression Ratio     Normal compression ratio for 13 seer and up is 1.4 to 4.3  
Evaporator Temperature Difference     ID dry and wet bulb temperatures are needed to determine the Target ETD  
   
 
 
 
 
     
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
Legend:       Adjustable Parameters                                              
∏   Pressure access port   Too low      Normal Too high  
COA   Condenser Over outdoor Air temperature       if less than   if within if greater than  
CR   Compression Ratio   TXV superheat       -        
CSH   Compressor Super Heat   subcooling        - 20     25    
CST   Condenser Saturation Temperature         13 seer and up    
DST   Discharge Saturation Temperature        
EBR   Evaporator Below Return air temperature Evaporator below return air       -        
ESH   Evaporator Super Heat      
EST   Evaporator Saturation Temperature   Condenser saturation temperature over ambient            
ETD   Evaporator air Temperature Difference   13 SEER and up         -        
OA   Outdoor Air   11 and 12 SEER         -        
RA   Return Air   9 and 10 SEER         -        
SA   Supply Air   8 SEER or less         -        
SC   Subcooling                                                  
SH   Superheat     Compression ratio                                  
TXV   Thermal eXpansion Valve   13 SEER and up         -        
        11 and 12 SEER         -        
            9 and 10 SEER         -        
              8 SEER or less         -        
           
        Tolerance for target superheat temperature              
        Tolerance for evaporator air temperature difference      
        Tolerance for manufactures TXV subcooling              
        Maximum suction line temperature above vapor line      
        Maximum temperature entering compressor            
        Estimated percentage of condenser pressure drop %    
                 
                  (all temperatures fahrenheit)                      
         
       
Notes:        
Minimal evaporator pressure drop is not considered in calculations. 
Vapor line temperature measured at the OD section of split systems and assumes adequate pipe insulation.
Record temperature of moving air shaded from the sun or other sources of radiant heat, insulate probes when taking line temps.
Discharge temp should be 160 to 225°F, anything over should be checked against the manufacturer’s recommended maximum
For every 1ºF of subcooling at the same condensing pressure, an increase of .5% system efficiency is achieved. Increasing the 
subcooling while increasing the condensing pressure reduces efficiency.
For heat pumps, correct refrigerant charge in cooling mode helps assure correct charge in heating mode.
Compressor amperage will follow the compression ratio, when the CR is high the amperage will be high and visa-versa.
Bubbles in a liquid line sight glass while subcooling is measured, indicates non-condensables, or an error in calibration.
Calculations assume a pure refrigerant and can indicate the possible presence of non-condensables but not mixtures.