A.O. Smith GDHE-50 - Table of Contents

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TABLE OF CONTENTS
GENERAL SAFETY INFORMATION ............................................. 4
Precautions ................................................................................4
Grounding Instructions...............................................................4
Hydrogen Gas Flammable .........................................................4
INTRODUCTION ........................................................................... 7
Abbreviations Used....................................................................7
Qualications .............................................................................7
iCOMM™ & BACnet Compatible ............................................... 7
Preparing for the Installation ......................................................7
FEATURES AND COMPONENTS ................................................8
INSTALLATION CONSIDERATION ...............................................9
Rough In Dimensions ................................................................9
Locating the Water Heater ....................................................... 10
Insulation Blankets................................................................... 11
Combustion Air and Ventilation ................................................ 11
Unconned Space ................................................................... 11
Conned Space .......................................................................12
Fresh Air Openings for Conned Spaces ................................ 12
Outdoor Air Through Two Openings ........................................12
Outdoor Air Through One Opening ..........................................12
Outdoor Air Through Two Horizontal Ducts .............................13
Air From Other Indoor Spaces .................................................13
Chemical Vapor Corrosion .......................................................14
Water Piping ............................................................................14
Power Supply...........................................................................14
INSTALLING THE NEW WATER HEATER ................................. 14
Mixing Valves ...........................................................................15
Dishwashing Machines ............................................................ 15
Space Heating and Potable Water System .............................15
Close Water Systems ..............................................................16
Thermal Expansion ..................................................................16
Temperature-Pressure Relief Valve ......................................... 17
Gas Piping ...............................................................................18
Supply Gas Regulator..............................................................18
Condensate Piping ..................................................................18
High Altitude Installations.........................................................19
Filling the Water Heater ...........................................................19
Venting ..................................................................................... 20
INSTALLATION REQUIREMENTS - COMMONWEALTH OF
MASSACHUSETTS .....................................................................22
Termination Clearances Sidewall Power Vent ......................... 23
Termination Clearances Sidewall Direct Vent .......................... 24
Installation Sequence ..............................................................25
DIRECT VENT DIAGRAM ........................................................... 30
Vent Pipe Preparation .............................................................. 31
Controls and Switches ............................................................. 33
TEMPERATURE REGULATION .................................................36
CONTROL SYSTEM OPERATION .............................................37
Overview ..................................................................................37
Control System Navigation ......................................................37
User Settings & Control System Menus ..................................40
FOR YOUR INFORMATION ........................................................ 45
Start Up Conditions..................................................................45
Operational Conditions ............................................................45
PERIODIC MAINTENANCE ........................................................ 46
Venting System Inspection ...................................................... 46
Anode Rod Inspection .............................................................46
Temperature-Pressure Relief Valve Test .................................46
Draining and Flushing ..............................................................47
Service .....................................................................................47
LEAKAGE CHECKPOINTS .........................................................48
TROUBLESHOOTING ................................................................49
Installation Checklist ................................................................ 49
Sequence of Operation Flow Chart .........................................50
Operational Problems .............................................................. 51
Fault and Alert Conditions........................................................ 51
LIMITED RESIDENTIAL GAS WARRANTY ................................ 55