A.O. Smith TC-049-R2 manual Residential GAS and Electric Water Heater, Table of Contents

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RESIDENTIAL GAS AND ELECTRIC WATER HEATER

SERVICE HANDBOOK

TABLE OF CONTENTS

 

Page

Introduction

 

Terms

1

Tools

2

Residential Gas Water Heaters

 

Guidelines

3

Installation

5

Operations and Servicing

 

Construction

6

Control

6

Burner

7

Normal Operations

7

Temperature

8

Gas

8

Water Flow

9

Service

10

Procedures and Conditions

11

Multiple Heater Piping

14

Exhaust Venting Notes

15

 

Page

Residential Electric continued

 

C-2 Circuit

21

C-2 Sequence of Operation

22

A-6 Circuit

23

A-6 Wiring Diagram

24

A-7

25

A-7 Wiring Diagram

27

Certification and Approvals

29

Simultaneous Dual Elements

30

C-2 Service

31

C-2 Voltage Checks

32

C-2 Grounded Element Check

34

A-6 Service

35

A-6 Element Test

35

A-6 Voltage Check

36

A-6 Grounded Element Test

38

A-7 Service

39

A-7 Element Test

40

A-7 Voltage Checks

41

A-7 Grounded Element Test

44

Miscellaneous Information

45

Residential Electric Water Heaters

A.O. Smith Technical Bulletins 46

Installation

16

Standard Illustrations

17

Guidelines

18

Elements

19

Thermostat

20

RESIDENTIAL GAS AND ELECTRIC HANDBOOK INTRODUCTION

This service handbook is designed to aid in servicing and troubleshooting A.O. Smith Residential Gas and Electric 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 commonly faced situations encountered in the operation of the Residential Gas and Electric 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 Center at 1-800-527-1953 or your local A.O. Smith Water Products Company representative for further assistance. Additional information is also available on the web site www.hotwater.com. This handbook is intended for use by licensed plumbing professionals and reference should be made to the instructional manual accompanying the product. This handbook contains supplemental information to the Residential Gas and Electric instructional manual.

A.O. Smith Water Products Company

1

Training Department

©2002

Ashland City, Tennessee

 

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Contents Smith Service Handbook Table of Contents Residential GAS and Electric Water HeaterQualifications Tools Required Miscellaneous Information General Section Service GuidelinesFormulas Construction General SectionInstallation of Residential GAS Water Heater Lighting PilotResidental GAS Water Heater Service Construction See also General section of this manualNormal Operation Residential GasService Handbook Setting Approximate Temperature F Time To Cause Injury Enters Here 000Fuel BTUPilot Gas If … … thenManifold Gas PressureSooting causes If … … then Electrical TestingThermocouple output test Procedures/Conditions If… … then ProceduresResidential Gas Electrical Testing CondensationCondensation is a mild acid it will corrode steel Exhaust Venting Notes 125 Standard Residential Electric Water Heaters Construction Heating elementsVoltage Notes Residential ElectricLocation Range F Newer TemperatureSurface Mounted Thermostat s and High Limit s Service Handbook Single Element Single Thermostat Single High Limit Wiring DiagramNormal Sequence of Operation Elements Thermostats High Limit CircuitOperation From cold tank of water Wiring Diagram Operation From cold tank of waterElements Thermostats High Limits Wire Service Handbook Post Cold tank of water Single Electrical Service Single Phase Certification and Approvals Three Phase Unbalanced Circuit WattageElement Test Ohms Resistance Check Test Conditions Test probe on each terminal of an elementComplaint No Hot Water Conditions ProcedureResidential Electric Service Test voltage between 4 and 2 or T2 and L4 If … … thenComplaint Water Too Hot Conditions Residential Electric Service No Hot WaterTest between the two element terminals If … … then Voltage Check Test between 4 and 2 or L4 and T2 If … … thenGrounded Element Check Amperage Method Test around red wire then black wire to element If … … thenResidential Electric Service Water Too Hot Circuit Servicing Voltage Check Testing with the MultimeterComplaint No hot water Test Conditions Test between 1 and 3 or L1 and L3 If … … thenTest between high limit 4 and lower thermostat 1 or L4 Residential Electric Service Voltage Check No Hot WaterComplaint Lack of Hot Water Conditions Test between high limit 4 and lower thermostat 2 or L4Service Handbook Prior To Post Testing The A-7 Wiring CircuitSupply wiring may be a See Pages 25 Test probe on each terminal of an element If … … then Test between upper high limit terminals 1 If … … then Power onVoltage Checks Test between upper high limit terminals 2Complaint Lack of Hot Water Test Conditions Test between lower high limit terminal 1 and 3 or L1 and L3Test Condition Test between the terminals of the lower element If … … thenPower on Thermostats are satisfied Volts times Amps = Watts Replacement elementsWatts divided by Volts = Amps Service Handbook Smith Technical Bulletins WHY Water Heater Tanks Leak What Prevention Water Conditions WHY Water Heater Tanks LeakWhat WHY Prevention Effects Water HammerGeneral FIXCause SymptomsMineral BUILD-UP Aluminum Hydroxide If tank is new with no lime build-up to any degreeDiscolored Water TreatmentSmelly Water Chlorination Procedure ProcedureNot Enough HOT Water GAS TestNot Enough HOT Water Electric Thermal Expansion Follow these easy steps to diagnose thermal expansionService Handbook Leaking Temperature and Pressure Relief Valve For every technical problem There is a solution

TC-049-R2 specifications

The A.O. Smith TC-049-R2 is a highly efficient and reliable water heater designed to meet the needs of both residential and light commercial applications. This gas-fired water heater offers a perfect blend of performance, efficiency, and durability, making it a popular choice among homeowners and business owners alike.

One of the standout features of the A.O. Smith TC-049-R2 is its tankless design. Unlike traditional water heaters with storage tanks, the TC-049-R2 heats water on demand, which means you only use energy when you need hot water. This not only results in lower energy bills but also provides an endless supply of hot water, ideal for households with multiple bathrooms or high hot water demands.

The TC-049-R2 is powered by natural gas, which enhances its efficiency and operating costs. With an impressive energy factor, this water heater is designed to conserve energy without compromising on performance. The unit also boasts a high recovery rate, which means it can quickly replenish hot water, ensuring you’re never left waiting.

Another notable technology in the A.O. Smith TC-049-R2 is its advanced electronic ignition system, which provides reliable start-up and reduces the chance of pilot light issues. Additionally, the unit features a scaled-down footprint, making it suitable for installation in tighter spaces, such as closets or utility rooms, without sacrificing performance.

Durability is a key characteristic of the TC-049-R2, as it is constructed with high-quality materials designed to resist corrosion and withstand typical wear and tear. The unit is equipped with a durable heat exchanger that enhances both efficiency and longevity, ensuring many years of reliable service.

Safety features are also prioritized in the A.O. Smith TC-049-R2. It comes equipped with advanced safety controls that prevent overheating and ensure safe operation. This offers peace of mind for users, knowing that the unit has multiple safeguards in place.

Overall, the A.O. Smith TC-049-R2 is an excellent choice for those seeking an efficient, reliable, and safe water heating solution. Its combination of advanced features, innovative technology, and robust construction makes it a leader in the water heater market, providing convenience and comfort to its users for years to come.
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