Table Of Contents - A.O. Smith HW 300 Instruction Manual

TABLE OF CONTENTS .......................................................................... 2
SAFE INSTALLATION, USE AND SERVICE.......................................... 3
GENERAL SAFETY................................................................................ 4
INTRODUCTION .................................................................................... 5
Abbreviations Used ........................................................................... 5
Qualifications ..................................................................................... 5
DIMENSIONS AND CAPACITY DATA .................................................... 6
CONTROL COMPONENTS ................................................................... 8
BOILER INSTALLATION CONSIDERATIONS ..................................... 12
Hydronic System ............................................................................. 12
Hot Water Supply Boiler System - General Water Line Connections
......................................................................................................... 12
Closed Water Systems .................................................................... 13
Thermal Expansion .......................................................................... 13
Vent Valves ...................................................................................... 13
Manifold Headers ............................................................................ 13
Cooling Piping ................................................................................. 13
Circulating Pump ............................................................................. 13
GENERAL REQUIREMENTS .............................................................. 15
Required Ability ................................................................................ 15
Location ........................................................................................... 15
Replacing Existing Common Vented Boiler ..................................... 15
Chemical Vapor Corrosion ............................................................... 16
Installation Clearances .................................................................... 16
Leveling ........................................................................................... 16

TABLE OF CONTENTS

System Connections ........................................................................ 16
Air Requirements ............................................................................. 16
Unconfined Space ........................................................................... 16
Fresh Air Openings for Confined Spaces ........................................ 17
VENTING .............................................................................................. 21
Standard Venting ............................................................................. 21
Sidewall Venting .............................................................................. 22
Venting System ................................................................................ 22
GAS SUPPLY CONNECTIONS ........................................................... 24
Gas Manifold Pressure Regulators .................................................. 25
BOILER START UP AND OPERATIONS ............................................. 26
Filling the System ............................................................................ 26
Precautions ...................................................................................... 26
Pilot and Main Burner ...................................................................... 26
Checking and Adjusting Input .......................................................... 28
TROUBLESHOOTING ......................................................................... 32
GENERAL MAINTENANCE ................................................................. 40
Manual Reset High Limit Switch Continuity Test ............................. 40
Pressure Relief Valve Test ............................................................... 40
Cleaning and Flushing Instructions ................................................. 40
Venting Maintenance ....................................................................... 41
WIRING ................................................................................................ 42
Wiring Connections ......................................................................... 42
PIPING DIAGRAMS ............................................................................. 47
LIMITED WARRANTY .......................................................................... 61
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