BTC 120-500 - AO Smith Water Heaters
BTC 120-500 - AO Smith Water Heaters
BTC 120-500 - AO Smith Water Heaters
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<strong>BTC</strong> TANK TYPE HEATERS<br />
SERVICE WORKBOOK<br />
<strong>BTC</strong> WORKBOOK<br />
TABLE OF CONTENTS<br />
PAGE<br />
Troubleshooting (continued)<br />
PAGE<br />
Introduction 2-3 Wire Harness Test 31<br />
IID Module 32<br />
Installation Pilot Spark 33<br />
Clearances 3-4 Pilot Valve 34<br />
Air Requirements 5-9 Main Burner Test 35<br />
Contaminated Air 10 Flame Rectification 36<br />
Flammable 11 IID Module 37<br />
Gas Pressure 12 Main Gas Valve 38<br />
Gas Valve 13<br />
Venting 14-17 Wiring Schematics<br />
Natural and Propane Gas 39<br />
Sequence of Operation<br />
Mechanical 18 Service Charts 40-41<br />
Electrical 19-20<br />
General Questions & Answers 42<br />
Troubleshooting<br />
Transformer 21<br />
High Limit 22-23<br />
Damper (on Standby) 24 Component Part Information 50<br />
PC Board 25-26<br />
Thermostat 27 Product Information Table 51<br />
Damper (call for heat) 28-30<br />
Service Check List 52-54<br />
<strong>BTC</strong> WORKBOOK INTRODUCTION<br />
This service workbook is designed to aid in servicing and troubleshooting A.O. <strong>Smith</strong> <strong>BTC</strong> water heaters in<br />
the field. No duplication or reproduction of this book may be made without the express written authorization<br />
of the A.O. <strong>Smith</strong> <strong>Water</strong> Products Company.<br />
The following text and illustrations will provide you with a step by step procedure to verify proper installation,<br />
operation, and troubleshooting procedures. Additional quick reference data is included to assist you in<br />
servicing this product.<br />
The information contained in this workbook is designed to answer commonly faced situations encountered in<br />
the operation of the <strong>BTC</strong> product line and is not meant to be all inclusive. If you are experiencing a problem<br />
not covered in this workbook, please contact the A.O. <strong>Smith</strong> Technical Information Department at 1-800-<br />
527-1953 or your local A.O. <strong>Smith</strong> <strong>Water</strong> Products Company representative for further assistance. This<br />
workbook is intended for use by licensed plumbing professionals and reference should be made to the<br />
installation manual accompanying the product. This workbook contains supplemental information to the<br />
<strong>BTC</strong> installation and operation manual.<br />
A.O. <strong>Smith</strong> <strong>Water</strong> Products<br />
Irving, Texas ©1998<br />
1<br />
Service Workbook<br />
Training Department
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