Rheem 70103 - User Manual

TM063 701, 702 & 703 Series Boiling Water Unit Service Instructions 1
Revision D: Feb 2017
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SERVICE INSTRUCTIONS
701, 702 & 703 Series
Boiling Water Units
TM063
Revision D
Published: 02/2017
701
702
703

Rheem 70103 Specifications

General

Model Number	70103
Brand	Rheem
Category	Boiler
Input BTU/h	105, 000
Output BTU/h	84, 000
Efficiency (AFUE)	80%
Venting	Atmospheric
Fuel Type	Natural Gas

Summary

Safety Warning

Preventative Maintenance

Operation

Operational Flow Charts

Operational Flow Chart - 703 Series

Activating Calibration Reset Mode

Activating Temp Override

Activate calibration reset mode (NZ Pre-2014 Models)

Activate calibration reset mode (Standard)

Components and their Function

Fault Finding

Error Codes (701 & 702 Series Only)

Error Codes (703 Series only)

Testing the Boiling Water Thermistor

Fault Finding Charts, Fault Diagnosis Sequence

General Fault Finding Chart

Thermistor and Triac Faults

Error Codes A-D

Troubleshooting for thermistor, triac, and probe issues.

Timer and Calibration Faults

Error Codes E, G

Troubleshooting for filter and calibration time-out errors.

Probe Fault Diagnostics

Error Codes H, J

Troubleshooting for low and high level probe faults.

Heating and Temperature Faults

Error Codes K, L, N

Troubleshooting for heating, ECO, and temperature rise errors.

Fault Finding Chart 1

Fault Finding Chart 1.1

Fault Finding Chart 1.1 a

Fault Finding Chart 2

Fault Finding Chart 3

Fault Finding Chart 4, 4.1 & 4.2

Fault Finding Chart 4 a, incl. (4.1 & 4.2) 703 Series

Fault Finding Chart 5

Fault Finding Chart 5 a 703 series

Fault Finding Chart 6

Fault Finding Chart 7

Fault Finding Tests

Fault Finding Tests 1 - 3А

Fault Finding Tests 3 B - 6 A

Fault Finding Tests 6 A - 8

Fault Finding Tests 9

Electrical Safety Testing

Component Replacement Procedures

Tap (Procedure 2 B) 701 Tap, timer fascia replacement

Tap components (Procedure 3 A) 702 & 703 Series

Inlet Strainer (Procedure 5) all models

Inlet Solenoid Valve & Inlet Fitting (Procedure 6)

Element (Procedure 10)

Boiling Water E.C.O. (Procedure 11)

Boiling Water Thermistor (Procedure 12)

Level Probe (Procedure 13)

Control Board (Procedure 14)

Water Outlet Flange (Procedure 16 A) 702 & 703 Series

Water Outlet Flange (Procedure 16 B) 701 Series

Boiling Water Storage Tank & Tank Insulation All models (Procedure 17)