A.O. Smith TC-099 User Manuals

Table of Contents

• Introduction

  2
• Qualifications

  2
• Display Is Blank

  42
• Service Warning

  2
• Error Message “Display Fail”

  43
• Tools Required

  3
• Error Message “No Config Key”

  43
• EMC 5000 Modulation Control System

  4
• Error Message “Config Key CRC”

  44
• UIM - User Interface Module - Overview

  4
• Error Message “Config Key Part”

  44
• UIM - Status Lights

  6
• Error Message “Low AC Voltage”

  45
• UIM - Input Buttons

  7
• Error Message “Low 24 VAC”

  45
• UIM - Changing Settings

  8
• Error Message “Low Water”

  45
• UIM - Menu Screens

  9
• Error Message “Low Gas”

  45
• Principles of Operation

  11
• Error Message “No Flow”

  46
• VFD and Blower Operation

  11
• Error Message “Sequence Err”

  48
• Venturi Operation - Gas Train

  12
• Error Message “Ignition Speed”

  48
• Blower Speed Verification - Hall Effect Sensor

  13
• Error Message “Mtr Spd < Min Spd”

  48
• Config Key - Blower Speed Programming

  14
• Error Message “Blower Prov Stg1”

  49
• Sequence Of Operation

  15
• Error Message “Blocked Flue”

  56
• START UP PROCEDURE

  17
• Error Message “Flame Stg1

  57
• Adjusting Manifold Gas

  19
• Error Message “Igniter Stg1

  60
• Poor Combustion - Ignition Problems

  20
• Boiler Controls Information

  61
• Manifold Gas Pressure Check

  23
• Operating Temperatures

  67
• Control Panel Layout

  24
• Bypass Lines

  67
• MCB - Modulation Control Board

  25
• Technical Specifications

  68
• PDB - Power Distribution Board

  35
• Glossary

  71