A.O. Smith ESTT-40, EJC-30, EJCN-40, ECT-80, ESTT-30, ECT-52, ECT-66 Introduction, Table of Contents

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INTRODUCTION

Thank You for purchasing this water heater. Properly installed and maintained, it should give you years of trouble free service.

Abbreviations Found In This Instruction Manual:

ANSI - American National Standards Institute

ASME - American Society of Mechanical Engineers

GAMA - Gas Appliance Manufacturers Association

NEC - National Electrical Code

NFPA - National Fire Protection Association

UL - Underwriters Laboratories Inc.

PREPARING FOR THE INSTALLATION

1.Read the “General Safety” section of this manual first and then the entire manual carefully. If you don’t follow the safety rules, the water heater will not operate properly. It could cause DEATH, SERIOUS BODILY INJURY, AND/OR PROPERTY DAMAGE.

This manual contains instructions for the installation, operation, and maintenance of the electric water heater. It also contains warnings throughout the manual that you must read and understand. All warnings and all instructions are essential to the proper operation of the water heater and your safety. READ THE

ENTIRE MANUAL BEFORE ATTEMPTING TO INSTALL OR OPERATE THE WATER HEATER.

2.The installation must conform with these instructions and the local code authority having jurisdiction and the requirements of the power company. In the absence of local code requirements follow NFPA-70, the National Electrical Code (current edition), which may be ordered from: National Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02269.

3.If after reading this manual you have any questions or do not understand any portion of the instructions, call the local utility or the manufacturer whose name appears on the rating plate.

4.Carefully plan your intended placement of the water heater. INSTALLATION OR SERVICE OF THIS WATER HEATER REQUIRES ABILITY EQUIVALENT TO THAT OF A LICENSED TRADESMAN IN THE FIELD INVOLVED. PLUMBING AND ELECTRICAL WORK ARE REQUIRED.

Examine the location to ensure the water heater complies with the “Facts to Consider About the Location” section in this manual.

5.For California installation this water heater must be braced, anchored, or strapped to avoid falling or moving during an earthquake. See instructions for correct installation procedures. Instructions may be obtained from California Office of the State Architect, 400 P Street, Sacramento, CA 95814.

6.Massachusetts Code requires this water heater to be installed in accordance with Massachusetts 248-CMR 2.00: State Plumbing Code and 248-CMR 5.00.

TABLE OF CONTENTS

 

SAFE INSTALLATION, USE AND SERVICE

2

GENERAL SAFETY

3

INTRODUCTION

4

Preparing for the New Installation

4

TABLE OF CONTENTS

4

TYPICAL INSTALLATION

5

MIXING VALVE USAGE

6

LOCATING THE NEW WATER HEATER

6-7

Facts to Consider About Location

6

Insulation Blankets

7

INSTALLING THE NEW WATER HEATER

7

Water Piping

7

Temperature-Pressure Relief Valve

9

Filling the Water Heater

10

T & P Valve and Pipe Insulation (Selected Models)

10

WIRING DIAGRAMS

11

WIRING

12

TEMPERATURE REGULATION

13

Temperature Adjustment

13

FOR YOUR INFORMATION

14

Thermal Expansion

14

Strange Sounds

14

Operational Conditions

14

Water Odor

14

“Air” in Hot Water Faucets

14

High Water Temperature Shut Off System

14

PERIODIC MAINTENANCE

15

Anode Rod Inspection

15

Temperature-Pressure Relief Valve Operation

15

Draining

15

Thermostat Removal/Replacement

15-16

Element Cleaning/Replacement

16-18

Drain Valve Washer Replacement

18

Service

18

LEAKAGE CHECKPOINTS

19

TROUBLESHOOTING GUIDELINES

20

REPAIR PARTS LIST

21-23

4

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Contents Residential Electric Safe INSTALLATION, USE and Service Important DefinitionsGeneral Safety Table of Contents IntroductionUprights /LOWBOYS Compacts Typical InstallationTable Tops Locating the NEW Water Heater Mixing Valve UsageFacts to Consider about the Location Insulation Blankets Installing the NEW Water HeaterWater Piping Water Piping Pressure Test TEMPERATURE- Pressure Relief Valve Filling the Water Heater Valve and Pipe Insulation On Selected ModelsWiring Diagrams Wiring Temperature Regulation Temperature AdjustmentFor Your Information Operational ConditionsPeriodic Maintenance TEMPERATURE-PRESSURE Relief Valve OperationThermostat Removal / Replacement Anode ROD InspectionElement Cleaning / Replacement Page Drain Valve Washer Replacement ServiceLeakage Checkpoints Troubleshooting Guidelines Problem Possible Causes Corrective ActionRepair Parts List Lowboy and Upright Electric Models Single and Dual ElementCompact or Manufactured Mobile Home Electric Models Table TOP Electric Models Residential Electric Warranty Conditions and ExceptionsService and Labor Responsibility Claim ProcedureInstallation Information Limitation on Implied WarrantiesPage

ECL-30, ECT-55, ECT-40, ECT-52, ECT-80 specifications

A.O. Smith is a well-respected name in the water heating industry, renowned for its innovative products and technologies. Among its notable offerings are the EJCN-40 and ECLN-40 electric water heaters, as well as the ECS-50 model. These units exemplify A.O. Smith's commitment to efficiency, durability, and user convenience.

The A.O. Smith EJCN-40 is a reliable and efficient electric water heater with a 40-gallon capacity. It features a foam-insulated tank that ensures minimal heat loss, allowing for increased energy efficiency. This model is equipped with two heating elements, providing faster recovery times and ensuring a steady supply of hot water when needed. The EJCN-40 is designed with a user-friendly thermostat that facilitates easy temperature adjustments, enhancing overall user experience.

Similarly, the ECLN-40 shares many features with the EJCN-40 but is specifically designed for commercial applications. This model prioritizes performance and energy efficiency, making it ideal for businesses that require a dependable hot water supply. The ECLN-40 is built with an impressive heat exchanger that maximizes heat transfer, minimizing energy consumption while maintaining optimal performance.

The A.O. Smith ECS-50 stands out with a 50-gallon capacity, catering to residential and light commercial settings. This unit features a high-quality glass-lined tank, which not only provides superior insulation but also helps prevent corrosion. The ECS-50 is designed with a heavy-duty anode rod that extends the life of the tank by minimizing the risk of rusting. Its compact design allows for versatility in installation, while the integrated thermostat provides ease of use.

A.O. Smith's water heaters are equipped with advanced safety features, including automatic temperature controls and pressure relief valves, ensuring safe operation. Additionally, these models come with Energy Star certification, indicating their compliance with strict energy efficiency standards.

In summary, the A.O. Smith EJCN-40, ECLN-40, and ECS-50 water heaters combine cutting-edge technology with robust design to deliver efficient, dependable hot water solutions. With features that cater to both residential and commercial needs, A.O. Smith continues to set the standard for quality and performance in the water heating industry.