Sealed System
5-17
R-134a Physical Properties:
R-134a - Tetrafluoroethane
Refrigerant of choice in automotive industry. Genetron134a replaces CFC12 for air conditioning and refrigeration
systems in commercial residential and industrial applications.
R-12 - Dichlorodifluoromethane
A versatile and widely used refrigerant. Common in reciprocating and rotary type equipment. For all types of appli-
cations, household to industrial. Also employed in some centrifugal designs and in several special
applications.
Chemical formula ................................................ CF
3
CH
2
F
Molecular weight ................................................. 102.03
Boiling point at 1 atm. .......................................... -15.1°F
(-26.2°C)
Critical temperature ............................................. 214.0°F (101.1°C)
Critical pressure, psia. ......................................... 589.9
Critical density. Ib./cu. tt. ..................................... 31.97
Liquid density at 80°F (26.7°C). Ib./cu. ft. ........... 75.0
Heat of vaporization at boiling point,
Btu/lb.°F ............................................................... 92.4
Specific heat of liquid at 80°F (26.7°C).
Btu/lb.°F ............................................................... 0.341
Specific heat of vapor at constant pressure
(1 atm.) and 80°F (26.7°C), (Btu/lb.°F) ............... 0.204
*Flammable range, %volume in air. .................... None
Ozone depletion potential .................................... 0
Greenhouse warming potential (estimate) .......... 0.285
* Flame limits measured using ASTM E681 with electrically activated kitchen match ignition source per ASHRAE
Standard 34.
Comparative Cycle Performance:
Evaporator temperature = 20°F
Condenser temperature = 110°F
Suction superheat = 30°F
sub-cooling = 10°F
Compressor isentropic efficiency = 65%
12
22
134a
Evaporator pressure, psi ............................... 21.0
43.0
18.5
Condenser pressure, psi ............................... 136.4 226.3 146.4
Compression ratio ........................................ 4.23
4.17
4.86
Compressor discharge temperature, °F ........ 188.1 227.0 178.3
Coefficient of performance ............................ 2.90
2.79
2.83
Refrigerant circulation per ton, Ib./min. ......... 3.80
2.78
3.00
Compressor displacement per ton, cfm. ....... 4.51
2.82
4.55
Liquid flow per ton, cu. in. /min. .................... 83.2
67.4
71.7
Latent heat at evaporator temp., Btu/lb ......... 66.5
90.6
86.9
Net refrigeration effect. Btu/lb ....................... 52.7
72.0
66.7
Refrigerant
Summary of Contents for E32AR75FPS
Page 2: ......
Page 10: ...1 8 Basic Information All Freezer Specifications ...
Page 12: ...1 10 Basic Information Notes ...
Page 24: ...Installation Information 2 12 Figure 2 21 Figure 2 22 ...
Page 25: ...Installation Information 2 13 Figure 2 23 Figure 2 24 ...
Page 28: ...Installation Information 2 16 Notes ...
Page 43: ...Ice Maker 4 13 ...
Page 44: ...Ice Maker 4 14 ...
Page 62: ...Sealed System 5 18 HFC 134a CFC 12 Pressure Temperature Chart ...
Page 90: ...Component Teardown 6 26 Notes ...
Page 92: ...Parts List 7 2 All Freezer Pro Cabinet Exploded View Model E32AF75FPS ...
Page 94: ...Parts List 7 4 All Freezer Pro System Exploded View Model E32AF75FPS ...
Page 96: ...Parts List 7 6 Ice Maker Exploded View Model E32AF75FPS ...
Page 98: ...Parts List 7 8 All Refrigerator Pro Door Exploded View Model E32AR75FPS ...
Page 100: ...Parts List 7 10 All Refrigerator Pro Cabinet Exploded View Model E32AR75FPS ...
Page 102: ...Parts List 7 12 All Refrigerator Pro System Exploded View Model E32AR75FPS ...
Page 104: ...Parts List 7 14 Notes ...
Page 108: ...Troubleshooting 8 4 Notes ...
Page 109: ...9 1 Wiring Schematics Ice Maker Schematic ...
Page 110: ...Wiring Schematics 9 2 All Freezer Pro Wiring Diagram ...
Page 111: ...Wiring Schematics 9 3 All Refrigerator Pro Wiring Diagram ...
Page 112: ...Wiring Schematics 9 4 Notes ...