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A.O. Smith DELC-30 - User Manual

A.O. Smith DELC-30
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100344253_2000601866_Rev_00
Commercial Electric
Water Heater
DELC-30/40/50
DENC-30/40
DEJC-50/66


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 Page
Important Safety Informaon ............................................... 3
Geng Started
....................................................................... 6
Installaon
............................................................................ 11
Troubleshoong
................................................................... 21
Maintenance
........................................................................ 24
Repair Parts
.......................................................................... 28
Warranty............................................................................... 29
Notes
.................................................................................... 30
LOW LEAD
CONTENT
Read this manual and the labels on the water heater before you install,
operate, or service it. If you have diculty following the direcons, or
aren’t sure you can safely and properly do any of this work yourself:
• Call our Technical Assistance Hotline at 1-888-479-8324 We can help you with
installaon, operaons, troubleshoong, or maintenance. Before you call, write
down the model and serial number from the water heaters data plate.
Incorrect installaon, operaon, or service can damage the water heater and
property, and present risks including re, scalding, electric shock, and explosion,
causing serious injury or death.
May, 2021
Question and Answer IconNeed help?

Do you have a question about the A.O. Smith DELC-30 and is the answer not in the manual?

Summary

Safety Information

Safety Alert Symbol and Signal Words

Explains safety alert symbols and signal words (Danger, Warning, Caution, Notice) used in the manual.

Owner Information Section

Section for owner to record purchase date, model and serial numbers for reference.

Electrical Shock and Lifting Risks

Details electrical shock risks and precautions for safely lifting the heavy water heater.

Scalding and High Temperature Risks

Explains scalding risks from hot water and how to prevent them, including temperature effects.

Water Contamination, Fire, and Explosion Risks

Covers risks of contamination, fire, explosion, T&P valve function, and hydrogen gas hazards.

Getting Started and Initial Setup

Unit Dimensions and Capacity Data

Provides tables with unit dimensions, tank capacities, and recovery capacities.

Installation Preparation and Tools

Lists essential tools and recommended accessories for water heater installation.

Electrical and Plumbing Requirements

Explains electrical safety, branch circuits, wiring, and plumbing considerations.

Model Ratings and Approvals

Lists agency approvals and provides a detailed model and rating plate breakdown.

Thermostat Wiring Diagrams

Presents wiring diagrams for dual element heaters in 3-phase and 1-phase configurations.

Installation Guide

Verify Plumbing System and Water Pressure

Checks plumbing system readiness and verifies water pressure, recommending pressure reducing valves.

Thermal Expansion Tank Importance

Explains the need for a properly sized and pressurized thermal expansion tank.

Drain Pan and Water Temperature Regulation

Details drain pan requirements and the importance of thermostatic mixing valves for temperature regulation.

Location Verification and Old Heater Removal

Ensures proper installation location and outlines steps for removing the old water heater safely.

Drain Pan Installation and Heater Placement

Specifies drain pan requirements and checks for correct water heater placement and clearances.

T&P Relief Valve and Discharge Pipe Connection

Details the proper installation of the T&P relief valve and its discharge pipe to prevent explosions.

Shutoff, Tempering Valves, and Water Supply Connection

Covers installing shutoff and tempering valves and connecting the water supply lines.

Hot Water Pipe Connection and Insulation

Details connecting hot water supply, pipe insulation, and verifying connections.

Final Water Fill and Leak Check

Ensures the tank is filled with water and checks all connections for leaks before proceeding.

Electrical Connection Procedures

Outlines the steps for making safe electrical connections, including power off and grounding.

Thermostat Adjustment and Temperature Setting

Explains how to adjust the water heater's thermostat for desired temperature and check water temp.

Operation and Vacation Settings

Prepares the water heater for normal operation and provides guidance for vacation settings.

Troubleshooting Common Issues

No Hot Water Diagnosis

Guides users through diagnosing and correcting issues causing no hot water, checking power and elements.

Energy Cut Off (ECO) Button Check

Explains how to check and reset the Energy Cut Off (ECO) button and potential causes for tripping.

Insufficient or Slow Hot Water Recovery

Addresses causes for insufficient hot water, including mixing valves, thermostat settings, and capacity.

Lower Heating Element Issues

Details problems with the lower heating element or thermostat and their symptoms.

High Water Temperature and Low Pressure Causes

Covers causes of excessively hot water, low water pressure, and potential remedies.

T&P Relief Valve Drips and Water Odor

Explains common causes for T&P relief valve drips and water odor, and potential solutions.

Routine Maintenance and Servicing

Routine Maintenance Overview

Highlights the importance of routine maintenance for longevity and efficiency, recommending professional help if needed.

Draining and Flushing the Water Heater

Provides step-by-step instructions for draining and flushing the tank to remove sediment and lime deposits.

Anode Rod Inspection and Replacement

Explains the anode rod's function and procedures for inspection and replacement to prevent corrosion.

Replacing the Heating Element

Details the process and tools required for replacing a faulty heating element, emphasizing safety.

Replacing the Thermostat

Provides step-by-step instructions and necessary tools for replacing the water heater's thermostat.

T&P Relief Valve Maintenance and Inspection

Covers annual operation and periodic inspection of the T&P relief valve for proper function.

Parts and Service Information

Parts Identification and Ordering Information

Lists key part numbers and descriptions with diagrams for identification and ordering replacement parts.

Product Warranty Details

Warranty Coverage and Exclusions

Details what is covered and not covered under the limited warranty, including terms and limitations.

Service Inquiry Procedures

Provides information on how to contact for service, including required details for inquiries.

User Notes

Summary

Safety Information

Safety Alert Symbol and Signal Words

Explains safety alert symbols and signal words (Danger, Warning, Caution, Notice) used in the manual.

Owner Information Section

Section for owner to record purchase date, model and serial numbers for reference.

Electrical Shock and Lifting Risks

Details electrical shock risks and precautions for safely lifting the heavy water heater.

Scalding and High Temperature Risks

Explains scalding risks from hot water and how to prevent them, including temperature effects.

Water Contamination, Fire, and Explosion Risks

Covers risks of contamination, fire, explosion, T&P valve function, and hydrogen gas hazards.

Getting Started and Initial Setup

Unit Dimensions and Capacity Data

Provides tables with unit dimensions, tank capacities, and recovery capacities.

Installation Preparation and Tools

Lists essential tools and recommended accessories for water heater installation.

Electrical and Plumbing Requirements

Explains electrical safety, branch circuits, wiring, and plumbing considerations.

Model Ratings and Approvals

Lists agency approvals and provides a detailed model and rating plate breakdown.

Thermostat Wiring Diagrams

Presents wiring diagrams for dual element heaters in 3-phase and 1-phase configurations.

Installation Guide

Verify Plumbing System and Water Pressure

Checks plumbing system readiness and verifies water pressure, recommending pressure reducing valves.

Thermal Expansion Tank Importance

Explains the need for a properly sized and pressurized thermal expansion tank.

Drain Pan and Water Temperature Regulation

Details drain pan requirements and the importance of thermostatic mixing valves for temperature regulation.

Location Verification and Old Heater Removal

Ensures proper installation location and outlines steps for removing the old water heater safely.

Drain Pan Installation and Heater Placement

Specifies drain pan requirements and checks for correct water heater placement and clearances.

T&P Relief Valve and Discharge Pipe Connection

Details the proper installation of the T&P relief valve and its discharge pipe to prevent explosions.

Shutoff, Tempering Valves, and Water Supply Connection

Covers installing shutoff and tempering valves and connecting the water supply lines.

Hot Water Pipe Connection and Insulation

Details connecting hot water supply, pipe insulation, and verifying connections.

Final Water Fill and Leak Check

Ensures the tank is filled with water and checks all connections for leaks before proceeding.

Electrical Connection Procedures

Outlines the steps for making safe electrical connections, including power off and grounding.

Thermostat Adjustment and Temperature Setting

Explains how to adjust the water heater's thermostat for desired temperature and check water temp.

Operation and Vacation Settings

Prepares the water heater for normal operation and provides guidance for vacation settings.

Troubleshooting Common Issues

No Hot Water Diagnosis

Guides users through diagnosing and correcting issues causing no hot water, checking power and elements.

Energy Cut Off (ECO) Button Check

Explains how to check and reset the Energy Cut Off (ECO) button and potential causes for tripping.

Insufficient or Slow Hot Water Recovery

Addresses causes for insufficient hot water, including mixing valves, thermostat settings, and capacity.

Lower Heating Element Issues

Details problems with the lower heating element or thermostat and their symptoms.

High Water Temperature and Low Pressure Causes

Covers causes of excessively hot water, low water pressure, and potential remedies.

T&P Relief Valve Drips and Water Odor

Explains common causes for T&P relief valve drips and water odor, and potential solutions.

Routine Maintenance and Servicing

Routine Maintenance Overview

Highlights the importance of routine maintenance for longevity and efficiency, recommending professional help if needed.

Draining and Flushing the Water Heater

Provides step-by-step instructions for draining and flushing the tank to remove sediment and lime deposits.

Anode Rod Inspection and Replacement

Explains the anode rod's function and procedures for inspection and replacement to prevent corrosion.

Replacing the Heating Element

Details the process and tools required for replacing a faulty heating element, emphasizing safety.

Replacing the Thermostat

Provides step-by-step instructions and necessary tools for replacing the water heater's thermostat.

T&P Relief Valve Maintenance and Inspection

Covers annual operation and periodic inspection of the T&P relief valve for proper function.

Parts and Service Information

Parts Identification and Ordering Information

Lists key part numbers and descriptions with diagrams for identification and ordering replacement parts.

Product Warranty Details

Warranty Coverage and Exclusions

Details what is covered and not covered under the limited warranty, including terms and limitations.

Service Inquiry Procedures

Provides information on how to contact for service, including required details for inquiries.

User Notes

A.O. Smith DELC-30 Specifications

General IconGeneral
BrandA.O. Smith
ModelDELC-30
CategoryWater Heater
LanguageEnglish

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