A.O. Smith 12 40GPC T 100 User Manual
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TABLE OF CONTENTS
INTRODUCTION:
Service Handbook Introduction ...........................................................................................................................3
Warnings and Cautions .......................................................................................................................................4
Table Of Contents ...............................................................................................................................................5
INSTALLATION / OPERATION:
Basic Installation & Operation .............................................................................................................................6
Combustion Air and Vent System Requirements .......................................................................................... 7-10
KNOW YOUR WATER HEATER:
Know the Water Heater’s Component Parts ................................................................................................11-13
Water Heater Operation ....................................................................................................................................14
Filling and Draining the Water Heater ...............................................................................................................15
Lighting Instructions ..........................................................................................................................................16
ADJUSTING TEMPERATURE CONTROL:
Adjusting the Temperature on the Electronic Control Display ...........................................................................17
Using the Electronic Control Display ........................................................................................................... 18-19
Electronic Control Display Troubleshooting ................................................................................................ 20-23
COMPONENTS REMOVAL / REPLACING:
External Inspection and Cleaning .....................................................................................................................24
Electronic Control Display Removal / Replacement .........................................................................................25
Powered Anode Removal / Replacement ................................................................................................... 26-27
Pressure Switch Removal / Replacement .........................................................................................................28
Transformer Removal / Replacement ......................................................................................................... 29-30
Air Intake Chamber Box Removal / Replacement ...................................................................................... 31-33
Wiring Harnesss Removal / Replacement .................................................................................................. 34-36
Air Intake Chamber Fan Removal / Replacement ...................................................................................... 37-38
Pressure Tubing Removal / Replacement .................................................................................................. 39-40
Inner Door/Manifold/Burner Assembly Removal / Replacement ................................................................. 41-42
Flame Sense/Hot Surface Igniter Removal / Replacement ..............................................................................43
Burner Removal / Replacement .................................................................................................................. 44-46
Burner Orifi ce Removal / Replacement ...................................................................................................... 47-49
Gas Control Valve/Thermostat Removal / Replacement............................................................................. 50-52
CHECKPOINTS / GENERAL INFORMATION:
Checking the Gas Supply Pressure ..................................................................................................................52
Gas Water Heater Sizing Guide -and- Leakage Checkpoints .........................................................................53
General Information .................................................................................................................................... 54-55