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A.O. Smith Cyclone XL BTHS 750A - User Manual

A.O. Smith Cyclone XL BTHS 750A
44 pages
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SERVICING SHOULD ONLY BE PERFORMED BY A QUALIFIED SERVICE TECHNICIAN
PRINTED 0220 100314732 2000568400 Rev. A
Service Handbook
COMMERCIAL GAS WATER HEATERSCOMMERCIAL GAS WATER HEATERS
MODELS
BTHS 750A & 1000A
SERIES 100 & 101
INSTALLATION - OPERATION
- SERVICE - MAINTENANCE
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Summary

Introduction and Qualifications

Service Warning for Unqualified Personnel

Warns unqualified individuals against performing procedures.

Sequence of Operation Flow Chart

Fault and Alert Codes Overview

Low Gas Pressure Faults

Discusses issues related to low gas supply pressure.

Gas Pressure Testing Procedure

Ignition Failure Troubleshooting

Ignition Failure Check and Repair Steps

Outlines checks for ignition problems.

Testing for Flame During Ignition

Describes how to test for flame during ignition.

Burner Failure to Ignite

Blocked Air Intake Troubleshooting

Blocked Air Intake Check and Repair

Outlines checks for blocked air intake issues.

Blocked Exhaust Troubleshooting

Blocked Exhaust Check and Repair

Outlines checks for blocked exhaust issues.

Flame Sensor Error Diagnosis

Flame Sensing Current Test Procedure

No Water Error Diagnosis

Anode Shorted Error Diagnosis

Temperature Probe Short Error Diagnosis

Temperature Probe Short Check and Repair

Outlines checks for a shorted temperature probe.

ECO High Temperature Limit Switch Function

Explains the function of the ECO high temperature limit switch.

Temperature Sensor Test Procedure

ECO Switch Continuity Test

Provides steps to test the ECO switch continuity.

Temperature Probe Open Error Diagnosis

Temperature Probe Open Check and Repair

Outlines checks for an open temperature probe.

Flue Gas Temperature Probe Faults

Flue Gas Temperature High Limit Fault

Flow Not Detected Error Diagnosis

Flow Not Detected Troubleshooting Steps

Provides steps to troubleshoot flow not detected errors.

Flow Switch Stuck Closed Error Diagnosis

Flow Switch Stuck Closed Troubleshooting Steps

Provides steps to troubleshoot flow switch stuck closed.

Electrical Connections for All Models

Power Supply Connection Procedure

Provides detailed steps for making power supply connections.

Enable;Disable Switch Functionality

Power Supply Testing Guide

Details how to test the power supply for voltage and grounding.

Critical Installation Checklist

Combustion Blower and Burner Service

Combustion Blower and Burner Removal

Provides steps for removing the combustion blower and burner assembly.

Spark Igniter Service and Operation

Central Control Board (CCB) Introduction

CPAM - Commercial Power Anode Module Explained

CPAM Fault and Warning Codes with Actions

Lists CPAM fault codes and their corrective actions.

Wiring Diagram for Water Heater

A.O. Smith Cyclone XL BTHS 750A Specifications

General IconGeneral
TypeCommercial Gas Water Heater
Weight455 lbs
Voltage120V
Frequency60 Hz
Pressure150 PSI
Capacity750, 000 BTU
BTU Input750, 000 BTU
Gas TypeNatural Gas
Temperature Range180°F
ProtectionGlass-lined tank
MaterialSteel

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