A.O. Smith 120 trough 500 BTR Tank Type Heaters Service Handbook, BTR Handbook Table of Contents

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BTR TANK TYPE HEATERS

SERVICE HANDBOOK

BTR HANDBOOK

TABLE OF CONTENTS

 

PAGE

 

PAGE

 

 

Troubleshooting (continued)

 

Introduction

1-2

Troubleshooting the Efflkal

30-31

 

 

Wire Harness Test

32

Installation

 

IID Module

33

Clearances

3-4

Pilot Spark

34

Air Requirements

5-9

Pilot Valve

35-36

Contaminated Air

10

Main Burner Test

37

Flammable

10

Flame Rectification

38

Gas Pressure

11

IID Module

39

Gas Valve

12

Main Gas Valve 40-41

 

Venting

13-15

 

 

 

 

Wiring Schematics

 

 

 

Natural and Propane Gas

42

Sequence of Operation

 

 

 

Mechanical

16

Service Charts

43

Electrical

17-18

 

 

 

 

General Questions & Answers

44

Troubleshooting

 

 

 

Transformer

19

Parts List

45-50

High Limit

20-21

 

 

Damper (on Standby)

22

Component Part Information

51

PC Board

22-23

 

 

Thermostat

24

Service Check List

52-53

Damper (call for heat)

25-26

 

 

Effikal Damper

27

Comments

54

Effikal Harness Test

28

 

 

Normal Operation

28-29

 

 

BTR WORKBOOK INTRODUCTION

This service handbook is designed to aid in servicing and troubleshooting A.O. Smith BTR water heaters in the field. No duplication or reproduction of this book may be made without the express written authorization of the A.O. Smith Water Products Company.

The following text and illustrations will provide you with a step by step procedure to verify proper installation, operation, and troubleshooting procedures. Additional quick reference data is included to assist you in servicing this product.

The information contained in this handbook is designed to answer common questions encountered in the operation of the BTR product line and is not meant to be all inclusive. If you are experiencing a problem not covered in this handbook, please contact the A.O. Smith Technical Information Department at 1-800-527- 1953 or your local A.O. Smith Water Products Company representative for further assistance. This handbook is intended for use by licensed plumbing professionals and reference should be made to the installation manual accompanying the product. This handbook contains supplemental information to the BTR installation and operation manual.

A.O. Smith Water Products

1

Service Handbook

Irving, Texas ©2000

Training Department

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Contents Page BTR Tank Type Heaters Service Handbook BTR Handbook Table of ContentsBTR Tank Type Heaters Service Handbook Clearance to Combustibles Table BTR Tank Type Heaters Service Handbook InstallationClearances from Combustibles ModelExterior Clearance AIR for Combustion Cubic Feet of AIR PER 1,000 BTU Excess AIRSquare Inch Per 4,000 Btuh MAKE-UP AIRDirect Communication Vertical Ducts Horizontal Ducts Square Inch Per 2,000 BtuhInsufficient MAKE-UP AIR BackdraftFlammable Items Contaminated AIRAIR for Combustion GAS Pressure Requirements Natural Gas Propane GasBTR GAS Valve Chimney VentingAtmospheric Multiple Heaters Single Unit Installation Draft InducerPower Vent Kits for Sidewall Venting BTR Sequence of Operation Sequence of OperationBTR Electrical Sequence 100 109 SeriesBTR Electrical Sequence of Operation Then Troubleshooting BTR Water HeatersStep Test the Transformer Step High LIMIT, Left Terminal Test Step Test High Limit Right Terminal After Push in Reset 24 VAC is now presentReasons For Resetting Condition Cause Solution Step Inspect the Damper Step Check the PC BoardPC Board Motor Test Service SwitchStep Step Thermostat Test Test the Damper Test from Orange wire to Black neutralStep Damper Input Test Step Test Damper Output Service SwitchAdapter Effikal DamperStep a Harness ChartNormal Operation Test for 24VAC Between Black CommonStep C Test for 24VAC Between Black and Yellow Normal OperationStep B Test Between Black Common and Brown Troubleshooting the Effikal Style DamperStep A1 On the Damper BoardTroubleshooting the Effikal Style Damper Step A3Step Wire Harness Test Step IID Module Test Step Pilot Spark Test Pilot Valve OHM Test BTR 120 400 GAS ValvePilot Valve Test BTR 500 only Pilot GAS Manifold Pressure TAP Blue White REDStep Main Burner Test Step Flame Rectification Flame RectificationPilot is lit Sparking has stopped Main GAS Valve Check Main GAS Valve Coil Check Main GAS Valve Coil Check BTR 500 onlyBTR Wiring Diagram Natural and Propane GAS Honeywell Ignition System 110 109 SeriesGeneral Service Chart General Questions and Answers When should BTRs be delimed?BTR Models 197 SeriesBTR Models 197 Series Parts List for BTR Models 197 and 198 Series 100 Parts Description BTRBTR Models 120 through SeriesBTR Models 120 through Series 193873-1 193873-0 Name Specifications AOS Part Numbers Component Part InformationBTR Service Checklist Proper Sequence of Operation Comments

120 trough 500 specifications

A.O. Smith, a renowned leader in water heating solutions, offers a wide range of products tailored to meet diverse needs. Among its most significant offerings is the A.O. Smith 120 through 500 series, which includes various models designed for both residential and commercial applications.

One of the standout features of the A.O. Smith 120 through 500 series is its efficiency. Many models are designed with advanced thermal insulation and heating technologies, which significantly minimize energy loss. This efficiency not only benefits the environment but also helps users save on energy bills, making these water heaters an economical choice for both homeowners and businesses.

The series includes both gas and electric water heaters, allowing users to select the option that best fits their energy preferences and availability. Gas models typically offer faster heating times and are ideal in areas where natural gas is readily accessible. Conversely, electric models come with a variety of voltage options, accommodating different electrical setups and preferences.

A notable technological advancement in the A.O. Smith 120 through 500 series is the incorporation of smart connectivity options. Some models are equipped with Wi-Fi capabilities, allowing users to monitor and control their water heater remotely via mobile apps. This feature provides real-time data, alerts, and updates, ensuring that users have complete control over their water heating needs.

Moreover, durability is a hallmark of the A.O. Smith brand. The tanks are often constructed from high-quality materials designed to resist corrosion. Many models also feature glass lining and protective coatings, which enhance the lifespan of the heater and minimize the risk of leaks.

Safety is another priority for A.O. Smith. The series is equipped with various safety features such as automatic shut-off mechanisms and temperature controls, ensuring that any potential issues are promptly addressed.

Overall, the A.O. Smith 120 through 500 series encapsulates innovation, efficiency, and reliability. With its versatile offerings and advanced features, it stands as an excellent choice for anyone in need of a dependable water heating solution. Whether for home use or in a commercial setting, these models deliver consistent performance and peace of mind.
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