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Evaporator Cover ...................................................... 6-16
Evaporator Fan Motor ................................................ 6-16
Evaporator Defrost Thermostat .................................. 6-17
Defrost Heater .......................................................... 6-17
Fresh Food Compartment Ice Maker (Flex Tray) ............. 6-18
Ice Bucket ............................................................... 6-18
Ice Maker ................................................................ 6-18
Ice Maker Housing ................................................... 6-19
Fill Funnel ............................................................... 6-19
Fill Tube .................................................................. 6-19
Air Handler ............................................................... 6-20
Auger Motor, Crusher Solenoid, and Fan .................... 6-21
Evaporator Housing ................................................... 6-21
Heater and Bimetal Thermostat ................................ 6-22
Replacement of Components .................................... 6-23
Ice Maker Control Cover ............................................ 6-26
Ice Maker Control ..................................................... 6-26
Ice Bucket ............................................................... 6-26
Ice Bin Housing ....................................................... 6-26
Ice Maker Left and Right Mold Switch ....................... 6-27
Bail Arm Ice Level Switch ......................................... 6-27
Ice Maker Drive Motor ............................................... 6-27
Ice Maker Gear Box ................................................. 6-27
Ice Maker Side Plate ................................................. 6-28
Ice Mold, Heater and Defrost Limiter for Finger Evap. . 6-28
Ice Maker Defrost Heater .......................................... 6-29
Ice Maker Suction Line Thermistor ............................ 6-29
Dispenser Auger Motor & Solenoid Assembly .............. 6-30
To Test Auger Motor .................................................. 6-30
To Test Solenoid Assembly......................................... 6-30
Thermostat ............................................................... 6-31
Ice Maker Frame Assembly ........................................ 6-31
Ice Auger and Crusher Assembly .............................. 6-32
Freezer Ice Maker ........................................................ 6-33
Section 7 Sealed System ...............................................
Safe Servicing Practices For All Appliances ...................... 7-2
Introduction .................................................................. 7-3
Compressor .................................................................. 7-3
Refrigeration Systems .................................................... 7-3
Sealed System Repair .................................................... 7-3
Definitions .................................................................... 7-4
Equipment Needed for Evacuation & Recharging ............. 7-4
Charging Sealed Systems ............................................... 7-5
Soldering ...................................................................... 7-5
Basic Components ......................................................... 7-6
Recovering Refrigerant .................................................. 7-7
Low/High Side Leak or Undercharge ............................... 7-8
Testing for Refrigerant Leaks ......................................... 7-8
Checking For Internal Leaks ........................................... 7-8
Compressor Replacement .............................................. 7-9
Flushing The System With Nitrogen ................................ 7-9
Installing a New Compressor ......................................... 7-10
Freezer Evaporator and Suction Line Replacement........... 7-11
Ice Maker Evaporator Replacement (Finger IM Evap.) ...... 7-13
Ice Maker Heat Exchanger Rep. (Finger IM Evap.) ........... 7-14
Freezer Heat Exchanger Rep. (Flex Tray IM Evap.) .......... 7-15
Ice Maker Evaporator Rep. (Flex Tray IM Evap.) .............. 7-16
Ice Maker Jumper Tube Rep. (Flex Tray IM Evap.) ........... 7-17
Condenser Replacement ................................................ 7-18
Filter-Drier Installation ................................................... 7-18
Perimeter Hot Tube Repair Kit ........................................ 7-20
Installing Evacuation and Recharging Equipment. ............ 7-21
Evacuating the System .................................................. 7-22
Charging The System ................................................... 7-24
Final Leak Test ............................................................. 7-24
Dedicated Equipment ................................................... 7-24
Vacuum Pump Maintenance .......................................... 7-25
Service Diagnostic Tips ................................................. 7-26
HFC 134a Comparison With CFC 12 ............................... 7-27
Inhalation Toxicity ........................................................ 7-27
Cardiac Sensitization .................................................... 7-27
Skin and Eye Contact ................................................... 7-27
Refrigerant Leaks ......................................................... 7-28
Spills or Leaks ............................................................ 7-28
Combustibility of HFC-134a ........................................... 7-29
Leak Testing ................................................................ 7-29
Bulk Delivery and Storage ............................................. 7-29
Filling and Charging Operations ..................................... 7-29
Refrigerant Recovery Systems ....................................... 7-29
Thermal Decomposition. .............................................. 7-29
R-134a Physical Properties ............................................ 7-30
HFC-134a, CFC-12 Pressure
HFC-134a, CFC-12 Pressure Temperature Chart ............. 7-31
Glossary of Terms ........................................................ 7-31
Section 8 Air Circulation................................................
Principles Of Automatic Defrost Operation ....................
Air Circulation Patterns ................................................
Section 9 Wiring Schematics .........................................
7-1
ERF2500++ Control Schematic Flex-Tray Dispenser Models ......
ERF2500++ Control Schematic Finger Evap. Dispenser Models
ERF2500++ Control Schematic Non-Dispenser Models ............
Flex-Tray Dispenser Models Fold-Out Schematic .....................
Finger Evaporator Dispenser Models Fold-Out Schematic ..........
Non-Dispenser Models Fold-Out Schematic ...........................
1-3
Basic Information
8-1
8-1
8-1
9-1
9-2
9-3
9-4
9-5
9-6
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