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Electric Point of Use
Water Heaters
IMPORTANT SAFETY INSTRUCTIONS
WARNING—When using electrical appliances, basic safety precautions to reduce the risk of fire, electric shock, or injury to persons
should be followed, including:
READ ALL INSTRUCTIONS BEFORE USING THIS
WATER HEATER.
The cord and plug connected water heater covered in this
1
manual (2
/
gallon models) must be grounded. Connect
2
only to properly grounded outlet. See "Electrical
Connections" section on page 8.
Install or locate this water heater in accordance with the
provided installation instructions.
Use this water heater only for its intended use as
described in this manual.
As with any appliance, close supervision is necessary
when used by children.
Printed in USA
Use & Care Manual
With Installation Instructions for the Installer
®
LISTED
786H
2½ through 30 Gallon Capacity
120 and 240 Volt Models
The purpose of this manual is twofold: one, to provide the installer
with the basic directions and recommendations for the proper
installation and adjustment of the water heater; and two, for the
owner–operator, to explain the features, operation, safety
precautions, maintenance and troubleshooting of the water heater.
This manual also includes a parts list.
It is imperative that all persons who are expected to install, operate
or adjust this water heater read the instructions carefully so they may
understand how to perform these operations. If you do not
understand these instructions or any terms within it, seek
professional advice.
Any questions regarding the operation, maintenance, service or
warranty of this water heater should be directed to the seller from
whom it was purchased. If additional information is required, refer to
the section on "If you need service."
Do not destroy this manual. Please read carefully and keep in a
safe place for future reference.
!
Recognize this symbol as an indication of Important
Safety Information!
!
California Proposition 65 Warning: This product contains
chemicals known to the State of California to cause cancer,
birth defects or other reproductive harm.
Do Not use an extension cord set with this water heater. If
no receptacle is available adjacent to the water heater,
contact a qualified electrician to have one properly installed.
Do Not operate this water heater if it has a damaged cord
or plug, if it is not working properly, or if it has been
damaged or dropped.
This water heater should be serviced only by qualified
service personnel. Contact nearest authorized service
center for examination, repair or adjustment.
SAVE THESE
INSTRUCTIONS
AP10227-11 (01/05)

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Summarization of Contents

Electric Point of Use Water Heaters
Important Safety Instructions
Essential safety precautions to reduce risk of fire, shock, or injury.
Safety Alerts and Warnings
Highlights safety symbols and California Proposition 65 warning for hazards.
Understanding Safety Information
Safety Alert Symbol
Symbol indicates important safety information and potential hazards.
Hazard Definitions
Defines hazard levels (DANGER, WARNING, CAUTION) and advisory messages (NOTICE).
Water Heater Operation and Safety
Water Temperature Adjustment and Scald Hazards
Discusses water temperature settings, scald risks, and safe temperature ranges.
Thermostat Adjustment Procedure
Details how to adjust the water heater thermostat for desired temperature.
Installation and Safety Guidelines
California Installation Requirements
Mandates bracing and anchoring for water heaters in California due to earthquake risks.
General Safety Precautions
Emphasizes understanding the manual, proper use, installation, and repair by qualified personnel.
Installation Procedures
Local Installation Regulations and Codes
Requires adherence to instructions, local codes, and utility company requirements.
Water Heater Location Requirements
Advises on choosing a clean, dry, accessible location near hot water fixtures, considering damage prevention.
Water Heater Installation Details
Understanding Thermal Expansion
Explains thermal expansion in closed systems and methods to control it.
Water Supply Connections and Piping
Guides on connecting hot/cold water lines, using unions, and handling heat-sensitive connections.
Critical Installation Components
Relief Valve Installation and Safety
Details proper installation of the relief valve and its discharge line for safety.
Filling the Water Heater Tank
Provides steps to ensure the tank is full of water before operation to prevent damage.
Electrical Installation Requirements
Understanding Condensation
Explains the normal formation of condensation on the tank when first filled or with heavy usage.
Electrical Connection Procedures
Details wiring conformity to codes, voltage/wattage specifications, and connection methods.
Branch Circuit Sizing and Wire Gauge
Offers guidance on selecting appropriate branch circuits and wire sizes based on heater wattage.
Insulation and Energy Efficiency
External Insulation Blankets
Addresses the use and cautions regarding external insulation blankets on water heaters.
Pipe Insulation Installation
Provides instructions for installing insulation on hot and cold water pipes to improve energy efficiency.
Installation Enhancements
Relief Valve Insulation
Guides on how to insulate the Temperature & Pressure (T&P) Relief Valve opening.
Heat Trap Functionality
Explains the purpose and installation of heat traps for energy saving.
Installation Checklist
Water Heater Location Checklist
Verifies correct placement considering demand, protection, and accessibility.
Water Supply Checklist
Confirms tank is filled, air purged, and connections are leak-free.
Relief Valve Checklist
Ensures proper installation and discharge line routing for the relief valve.
Wiring Checklist
Verifies correct power supply, circuit protection, and grounding.
Operating the Water Heater
Hydrogen Gas and Safety Precautions
Warns about hydrogen gas formation and lists key safety precautions during operation.
Safety Controls Explained
Details the function of thermostat and the Emergency Cut-Off (ECO) limit control.
Emergency Operating Instructions
Outlines immediate actions for flood, fire, or physical damage to the water heater.
Water Temperature Control
Setting Water Temperature and Scald Risk
Guides on setting temperature, its relation to scald hazards, and energy savings.
Thermostat Adjustment Procedure
Provides step-by-step instructions for adjusting thermostat dial pointers.
Water Heater Maintenance and Care
Draining the Water Heater Safely
Details the process of safely draining the water heater tank.
Routine Preventative Maintenance Schedule
Outlines recommended regular checks, cleaning, and inspections for optimal performance.
Vacation and Extended Shut-Down Procedures
Advises on proper steps for long-term storage and draining.
Troubleshooting and Service
Troubleshooting Common Problems
Offers solutions for issues like rumbling noises, relief valve noise, and no hot water.
Replacement Parts Information
Parts Ordering Instructions
Details required information for ordering replacement parts.
2 1/2 Gallon Model Parts Diagram
Illustrates and labels components for 2 1/2 gallon models.
6, 10, 20 Gallon Model Parts Diagram
Illustrates and labels components for 6, 10, and 20 gallon models.
30 Gallon Model Parts Diagram
Illustrates and labels components for 30 gallon models.
Getting Service and Support
Initial Service Contact Recommendations
Suggests contacting installer, contractor, or local utility first for service needs.
Manufacturer Service Contact Information
Provides contact details and required information for the National Service Department.
Wiring Diagrams and Schematics
Wiring Configurations for Thermostats
Illustrates various wiring diagrams for single and double element thermostats.

Table of Contents