A.O. Smith 225M User Manuals

Table of Contents

• ROUGH-IN DIMENSIONS

  2
• FOREWORD

  3
• GENERAL SAFETY INFORMATION

  3
• Precautions

  3
• Grounding Instructions

  4
• Chemical Vapor Corrosion

  4
• Liquid Petroleum Models

  4
• High Altitude Installations

  4
• FEATURES

  5
• Automatic Gas Shutoff Control

  5
• Protector Switch (Coil High Limit)

  5
• Thermal Balancer

  5
• Intermittent Ignition Control Module

  5
• Circulating Pump

  6
• Tank Temperature Control (Not Supplied)

  6
• Safety Flow Switch (Not Supplied)

  6
• Drain Valve (Not Supplied)

  7
• Thermometers (Not Supplied)

  7
• INSTALLATION INSTRUCTIONS

  8
• Important

  8
• Required Ability

  8
• Location

  8
• Installation Clearances

  8
• Levelling

  8
• Air Requirements

  8
• Venting

  9
• Relief Valve

  9
• Hard Water

  10
• Closed Water System

  10
• Water Line Connections

  10
• Water (Potable) Heating

  10
• PIPING DIAGRAMS

  11
• Gas Connections

  14
• Electrical Information

  15
• OPERATION

  17
• Important

  17
• General

  17
• Filling

  17
• Purging Of Gas Line

  17
• Operating Instructions For I.I.D Models.

  18
• Checking And Adjusting The Input

  19
• SERVICE INFORMATION

  20
• Pilot And Main Burner Maintenance

  20
• I.I.D. Pilot Burner

  20
• Protector Switch (Coil High Limit-All Heaters)

  21
• Tank Temperature Control

  21
• Automatic Gas Shutoff Control

  21
• Thermal Balancer

  21
• Inspecting The Heat Exchanger And Venting System

  21
• Gas Pressure Regulator

  22
• Relief Valve

  22
• Circulating Pump

  22
• Electrical Service

  22
• Replacement Parts

  22
• PREVENTIVE MAINTENANCE

  22
• Deposits From Coil Type Commercial Water Heaters

  22
• Deliming Solvents

  23
• Removing Light Deposits

  23
• Heavy Lime Deposits

  23
• CHECKOUT

  24
• LIMITED WARRANTY

  28