Rheem RTG74 - RTG 66 Model Information; Wiring Diagram

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SVC 810 Tankless Troubleshooting Manual

25

RTG 66

Wiring Diagram

Table of Contents

Default Chapter2
- Table of Contents2
Specifications Common to All Product Lines5
Product (Model) History6
Sequence of Operations8
Sensors and Safety9
- Oxygen Depletion Sensing System Operation9
- How to Reset the Four (4) Hour ODS Timer10
- Overheat Film Wrap10
- Heat Exchanger Thermistor11
Maintenance Panel Display11
Clearing the Fault History12
Adjusting the Burner Control Assembly (Printed Circuit Board)12
How to Check Manifold Gas Pressure13
Program Chip Adjustment14
Changing the Maximum Temperature Setting to 14015
Changing the Maximum Temperature Setting to 12015
Error Codes16
Diagnostic Points on Printed Circuit Board19
Thermistor Resistance Chart20
Fan Speed Chart21
Rtg2-4222
- Wiring Diagram22
- Printed Circuit Board23
Rtg 5324
- Wiring Diagram - RTG 5324
- Printed Circuit Board - RTG 5325
Rtg 6626
- Wiring Diagram26
- Printed Circuit Board27
- Error Code 11 (RTG66 Only)28
- Error Code 51 (RTG 66 Only)31
- Error Code 61 (RTG 66 Only)32
- Error Code 65 (RTG66 Only)33
- Code 65 Water Volume Control Fault33
- Error Code 66 (RTG66 Only)34
Rtg 7435
- Wiring Diagram - RTG 7435
- Printed Circuit Board - RTG 7436
MIC-180 & EZ Link37
- MIC-180 Printed Circuit Board37
- Error Code 03 (MIC-180 & Ezlink Only)38
- Test Run Mode38
- MIC 180 Maintenance Mode Table39
- Maintenance Information Mode39
2Nd Generation Flame Rod Chart40
Troubleshooting41
- Troubleshooting Format and Example41
- Unit will Not Power on42
- Error Code 0045
- Warning Code 0545
- Warning Code 1046
- Error Code 1146
- Error Code 1250
- Error Code 1351
- Error Code 1452
- Code 14 Overheat Film Wrap Activated52
- Error Code 1553
- Error Code 1654
- Error Code 21 (Indoor Models Only)54
- Error Code 2455
- Error Code 2955
- Error Code 3155
- Error Code 3156
- Error Code 3256
- Error Code 3357
- Error Code 3457
- Error Code 3558
- Error Code 3858
- Error Code 5158
- Error Code 5259
- Error Code 6160
- Error Code 6560
- Code 65 Water Volume Control Fault60
- Error Code 66 (RTG66 Only)61
- Error Code 7161
- Error Code 7261
- Error Code 7662
- Error Code 7962
- Error Code 80/8162
- Error Code 8262
  - Code 76 Communication Fault with Remote62
  - Code 79 Fan Motor Current Fault62
- Error Code 9063
- Error Code 9964
- Warning Code IL64
- Warning Code P165
Disassembly and Repair65
- St Generation 7.4 Product Series65
- Printed Circuit Board (PCB)65
- Disassembly/Repair 1St Generation 7.4 Series65
- Air Filter Switch66
- Water Inlet Solenoid66
- Hot Water Outlet67
- Transformer67
- Fan Assembly68
- Proportional Gas Flow Regulator69
- Burner Plate Cover70
- Burner Assembly70
- Igniter and Igniter Probes71
- Flame Rod(S)71
- Heat Exchanger Thermistor71
Parts72
- Parts Exploded View for RTG2-42PV and RTG 53PV75
- Parts Exploded View for RTG 53X76
- Parts Exploded View for RTG 53DV77
- Parts Exploded View for RTG 66DV78
- Parts Exploded View for RTG 74PV and GT 199PV79
- Parts Exploded View for RTG 74DV and GT 199DV80
- Parts Exploded View for RTG 74X and GT 199X81

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