A.O. Smith 300 Series User Manual

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Instruction Manual
RESIDENTIAL GAS WATER HEATERS
LOW LEAD
CONTENT
WARNING: If the information in these
instructions is not followed exactly, a fire
or explosion may result causing property
damage, personal injury or death.
Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
WHAT TO DO IF YOU SMELL GAS:
Do not try to light any appliance.
Do not touch any electrical switch; do
not use any phone in your building.
Immediately call your gas supplier
from a neighbor’s phone. Follow the
gas supplier’s instructions.
If you cannot reach your gas supplier,
call the fire department.
Installation and service must be
performed by a qualified installer,
service agency or the gas supplier.
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•
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Thank you for buying this energy e󰀩cient water
heater. We appreciate your condence in our
products.
POWER VENT/POWER DIRECT VENT GAS MODELS
WITH DIRECT SPARK IGNITION
300/301 SERIES MODELS
CANADIAN MANUAL
Read and understand this instruction
manual and the safety messages
herein before installing, operating or
servicing this water heater.
Failure to follow these instructions and
safety messages could result in death
or serious injury.
This manual must remain with the
water heater.
• For Your Safety •
AN ODORANT IS ADDED TO THE GAS USED BY
THIS WATER HEATER.
ALL TECHNICAL AND WARRANTY QUESTIONS: SHOULD BE DIRECTED TO THE LOCAL DEALER FROM WHOM THE WATER HEATER WAS PURCHASED.
IF YOU ARE UNSUCCESSFUL, CALL THE TECHNICAL SUPPORT PHONE NUMBER SHOWN ON THE WATER HEATER LABELING.
KEEP THIS MANUAL IN THE POCKET ON HEATER FOR FUTURE REFERENCE WHENEVER MAINTENANCE
ADJUSTMENT OR SERVICE IS REQUIRED.

A.O. Smith 300 Series Specifications

General

Brand	A. O. Smith
Series	300 Series
Category	Water Heater
Warranty	6 years
Capacity	50 gallons

Summary

SAFE INSTALLATION, USE AND SERVICE

GENERAL SAFETY INFORMATION

PRECAUTIONS AND HAZARDS

Essential safety precautions, including scald risk, grounding, and gas hazards.

INTRODUCTION

QUALIFICATIONS AND PREPARATION

Requirements for installers and key steps before beginning the installation process.

INSTALLATION CONSIDERATIONS

LOCATING THE WATER HEATER

Guidelines for selecting an appropriate installation site.

COMBUSTION AIR AND VENTILATION

Requirements for adequate airflow for combustion.

INSTALLATION REQUIREMENTS

CHEMICAL VAPOR CORROSION AND WATER PIPING

POWER SUPPLY AND WIRING

Electrical power, grounding, and wiring requirements for safe operation.

GAS SUPPLY SYSTEMS AND PRESSURE

GAS PRESSURE REQUIREMENTS

Minimum and maximum gas pressure specifications for safe operation.

THERMAL EXPANSION AND RELIEF VALVE

TEMPERATURE-PRESSURE RELIEF VALVE

Description and function of the safety relief valve.

CONDENSATE PIPING

VENTING INSTALLATION

VENT INSTALLATION CONSIDERATIONS

Factors affecting vent system installation choices and orientations.

SIDEWALL TERMINATION CLEARANCES

CONCENTRIC VENT INSTALLATION

SAFETY CONSIDERATIONS

Safety precautions specific to concentric vent installation.

LOW PROFILE TERMINATION INSTALLATION

WATER HEATER INSTALLATION

CONDENSATE DRAIN AND GAS PIPING

ELECTRICAL WIRING AND CONTROLS

TEMPERATURE REGULATION

HIGH TEMPERATURE LIMIT CONTROL AND THERMOSTAT

Function of ECO and thermostat for temperature control.

CONTROL SYSTEM OPERATION

CONTROL SYSTEM NAVIGATION AND MENUS

USER SETTINGS & CONTROL SYSTEM MENUS

TEMPERATURES MENU

Heater Information and Faults

START UP

START-UP PREPARATION AND FILLING

FOR YOUR SAFETY READ BEFORE LIGHTING

OPERATING INSTRUCTIONS

PERIODIC MAINTENANCE

ANODE ROD INSPECTION

POWERED ANODE RODS

TEMPERATURE-PRESSURE RELIEF VALVE TEST

Procedure for testing the safety relief valve.

TANK CLEANING AND FLUSHING

BURNER FLAME INSPECTION

LEAKAGE CHECKPOINTS

TROUBLESHOOTING

INSTALLATION CHECKLIST AND LOCATION

SEQUENCE OF OPERATION

OPERATIONAL PROBLEMS

ROUGH STARTING AND OPERATION

NO HOT WATER ISSUES

Solutions for insufficient or no hot water supply.

FAULT AND ALERT CONDITIONS

Understanding and responding to fault/alert messages.

DIAGNOSTIC CHECKS

FAULT AND ALERT MESSAGES