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A.O. Smith BTR 119 SERIES - User Manual

A.O. Smith BTR 119 SERIES
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COMMERCIAL GAS HIGH EFFICIENCY WATER HEATERS
Service Handbook
PRINTED IN THE U.S.A. 1016 100277701_2000536453_Rev A
500 Tennessee Waltz Parkway
Ashland City, TN 37015
FOR MODELS:
BTR 120 thru 400(A) Series 118 & 119
INSTALLATION CONSIDERATIONS - PRE SERVICE CHECKS -
CONSTRUCTION - OPERATION & SERVICE - TROUBLESHOOTING
SERVICING SHOULD ONLY BE PERFORMED BY A QUALIFIED SERVICE TECHNICIAN

Questions and Answers

Summary

Installation Considerations

Thermal Expansion Effects

Explains thermal expansion effects and the need for expansion tanks.

Air Requirements for Operation

Highlights importance of proper combustion and ventilation air.

Contaminated Air Hazards

Warns about contaminants in combustion air and their effects.

Gas Supply Systems and Regulators

Gas Piping Guidelines

Gas Piping and Sediment Trap Installation

Integrated Temperature Control-High Limit Switch

Electronic Ignition Control;Ignition Module

Troubleshooting Checklist

General Service Chart

Fault and Warning Codes - Continued

Effikal Flue Damper Troubleshooting Guide

Damper Diagnostic Tests

Test for 24 VAC on Damper PC Board

Tests for 24VAC on the damper PC board to diagnose opening issues.

Test the Three Amp Fuse

Checks the 3-amp fuse for continuity and proper voltage.

Damper and Harness Testing

Test for 24 VAC on Damper PC Board (Black;Yellow)

Tests 24VAC on the damper PC board for correct operation.

Wire Harness Test Procedure

Tests the wire harness connections to the IID module.

IID Module Testing

IID Module Test (Power to Pilot Valve)

Tests for 24VAC at the PV terminal on the IID during ignition trial.

Pilot Spark Test

Flame Rectification Test

IID Module Main Burner Test

IID Module Test (MV Terminal)

Tests for 24 VAC between the MV terminal and ground on the IID.

Main Burner Ignition Test

Summary

Installation Considerations

Thermal Expansion Effects

Explains thermal expansion effects and the need for expansion tanks.

Air Requirements for Operation

Highlights importance of proper combustion and ventilation air.

Contaminated Air Hazards

Warns about contaminants in combustion air and their effects.

Gas Supply Systems and Regulators

Gas Piping Guidelines

Gas Piping and Sediment Trap Installation

Integrated Temperature Control-High Limit Switch

Electronic Ignition Control;Ignition Module

Troubleshooting Checklist

General Service Chart

Fault and Warning Codes - Continued

Effikal Flue Damper Troubleshooting Guide

Damper Diagnostic Tests

Test for 24 VAC on Damper PC Board

Tests for 24VAC on the damper PC board to diagnose opening issues.

Test the Three Amp Fuse

Checks the 3-amp fuse for continuity and proper voltage.

Damper and Harness Testing

Test for 24 VAC on Damper PC Board (Black;Yellow)

Tests 24VAC on the damper PC board for correct operation.

Wire Harness Test Procedure

Tests the wire harness connections to the IID module.

IID Module Testing

IID Module Test (Power to Pilot Valve)

Tests for 24VAC at the PV terminal on the IID during ignition trial.

Pilot Spark Test

Flame Rectification Test

IID Module Main Burner Test

IID Module Test (MV Terminal)

Tests for 24 VAC between the MV terminal and ground on the IID.

Main Burner Ignition Test

A.O. Smith BTR 119 SERIES Specifications

General IconGeneral
CategoryWater Heater
ModelBTR 119 SERIES
Power SourceElectric
ThermostatAdjustable
Voltage120V
Dimensions520mm (Diameter) x 1210mm (Height)
Weight35 kg
Warranty5 years

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