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A.O. Smith BTX-80 - User Manual

A.O. Smith BTX-80
24 pages
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1
PRINTED IN THE U.S.A. 0406 PART NO. 197086-000
Thank you for buying this energy efficient water heater.
We appreciate your confidence in our products.
You should thoroughly read this manual before installation and/
or operation of this water heater. Please pay particular attention
to the important safety and operating instructions as well as the
WARNING and CAUTIONS.
CAUTION
TEXT PRINTED OR OUTLINED IN RED CONTAINS INFORMATION
RELATIVE TO YOUR SAFETY. PLEASE READ THOROUGHLY
BEFORE INSTALLING AND USING THIS APPLIANCE.
MODEL BTX-80
COMMERCIAL GAS WATER HEATER
Glass-Lined Tank-Type Water Heater
GET TO KNOW YOUR WATER HEATER 2-3
GENERAL SAFETY INFORMATION 4-5
INSTALLATION 5-16
OPERATION 16-18
MAINTENANCE AND
TROUBLESHOOTING 18-21
TROUBLESHOOTING WITH THE LED 22
LIMITED WARRANTY 23
TABLE OF CONTENTS
PAGE
KEEP THIS MANUAL IN THE POCKET ON THE HEATER FOR FUTURE REFERENCE
WHENEVER MAINTENANCE ADJUSTMENT OR SERVICE IS REQUIRED.
A DIVISION OF A.O. SMITH CORPORATION
McBEE, SOUTH CAROLINA, U.S.A.
www.aosmithwaterheaters.com

Questions and Answers

  • R
    Robert JonesAug 12, 2025
    What to do if one of the temperature adjust buttons stuck closed on A.O. Smith Water Heater?
    • B
      billy47Aug 12, 2025
      If one of the temperature adjust buttons is stuck closed on your A.O. Smith Water Heater: Press and release each of the buttons once. If the issue continues, replace the gas control valve.
  • M
    Matthew MillerAug 15, 2025
    What to do if A.O. Smith BTX-80 system is in lockout?
    • R
      Robert GonzalezAug 15, 2025
      If your A.O. Smith Water Heater is in lockout, consider the following: Ensure the gas supply is on and sufficient for operation. Check the hot surface ignitor's position. Verify adequate voltage to the water heater. Test and correct the electrical polarity to the unit.
  • M
    Mason TorresAug 19, 2025
    How to fix an error in the hot surface ignitor circuit of A.O. Smith BTX-80 Water Heater?
    • J
      Jerry CoxAug 19, 2025
      To resolve an error in the hot surface ignitor circuit of your A.O. Smith Water Heater: First, check that all wiring connections are correct and secure. If the issue persists, replace the hot surface ignitor.
  • Y
    ymorrisAug 23, 2025
    What to do if the A.O. Smith Water Heater pressure switch remained open?
    • D
      Denise FoxAug 23, 2025
      If the pressure switch on your A.O. Smith Water Heater remains open longer than 5 seconds after the combustion blower starts, check the following: Ensure the pressure switch wiring is correct. Verify that the pressure switch tubing is connected correctly. Inspect for any obstructions in the air intake or exhaust.
  • M
    Michael HillAug 27, 2025
    What to do if A.O. Smith BTX-80 pressure switch remained closed?
    • G
      gibsonnathanielAug 27, 2025
      If the pressure switch on your A.O. Smith Water Heater remains closed longer than 5 seconds after the call for heat began: Ensure the pressure switch wiring is correct. If the issue continues, consider replacing the pressure switch.
  • A
    Amy Meyers DDSAug 31, 2025
    What to do if there is a problem in the gas valve driver circuit of A.O. Smith BTX-80?
    • B
      Brian CastilloAug 31, 2025
      If there's a problem in the gas valve driver circuit of your A.O. Smith Water Heater: Turn the power to the water heater off for 10 seconds, and then turn it back on. If the problem persists, replace the gas control valve.
  • S
    sharonmorganSep 3, 2025
    What to do if there is a problem with the internal circuit of A.O. Smith BTX-80?
    • B
      brookszacharySep 3, 2025
      If you are experiencing a problem with the internal circuit of your A.O. Smith Water Heater, try this: Turn the power to the water heater off for 10 seconds, then turn it back on. If the problem continues, the gas control valve may need to be replaced.
  • P
    pachecodebraSep 7, 2025
    How to fix an open earth ground circuit to the ignition system of A.O. Smith BTX-80 Water Heater?
    • A
      April ThomasSep 7, 2025
      To fix an open earth ground circuit to the ignition system of your A.O. Smith Water Heater: Check that the earth ground connection is properly connected and that the ground conductor on the water heater is properly connected.

Summary

GENERAL SAFETY INFORMATION

INSTALLATION

VENT PIPE PREPARATION

Steps for preparing vent pipes, including cutting, deburring, and fitting preparation.

CONDENSATE

Information on condensate formation, drainage, and potential issues within the venting system.

INSTALLATION OF VENT SYSTEM, SIDEWALL

Detailed instructions for installing the vent system through a sidewall opening.

INSTALLATION OF VERTICAL VENT SYSTEM

Instructions for installing the vent system vertically through the roof or wall.

CONNECTION OF GAS PIPE

Procedure for connecting the gas supply line, including leak testing and dirt leg installation.

PLANNING THE VENT SYSTEM

Guidance on routing the vent system, considering pipe lengths, elbows, and terminal location.

HIGH ALTITUDE INSTALLATION

Specific requirements and warnings for installing the unit at higher elevations.

CLOSED WATER SYSTEM

Explains the risks of closed systems and the need for thermal expansion management.

RELIEF VALVE

Details requirements for installing a compliant temperature and pressure relief valve.

GAS CONNECTIONS

Instructions for safe and proper gas line connections, including pressure limits.

OPERATION

TO OPERATE THE HEATER

Step-by-step guide for initiating the water heater's heating cycle.

FOR YOUR SAFETY READ BEFORE LIGHTING

OPERATING INSTRUCTIONS

Sequence for safely starting and operating the water heater, including thermostat settings.

TO TURN OFF GAS TO APPLIANCE

Procedure for safely shutting down the gas supply to the water heater.

TEMPERATURE REGULATION

SETTING THE WATER HEATER TEMPERATURE AT 120°F

Recommendations for setting temperature to reduce scald risk and improve efficiency.

SERVICE AND REPAIR

TROUBLE SHOOTING

Information to help diagnose common water heater problems before calling a service technician.

TROUBLESHOOTING

LIMITED WARRANTY

A.O. Smith BTX-80 Specifications

General IconGeneral
BrandA.O. Smith
ModelBTX-80
CategoryWater Heater
LanguageEnglish

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