Table Of Contents - A.O. Smith Gdhe 50 Instruction Manual

GENERAL SAFETY INFORMATION ............................................. 4
Precautions ................................................................................ 4
Grounding Instructions............................................................... 4
Hydrogen Gas Flammable ......................................................... 4
INTRODUCTION ........................................................................... 7
Abbreviations Used.................................................................... 7
Qualifications ............................................................................. 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
Unconfined Space ................................................................... 11
Confined Space ....................................................................... 12
Fresh Air Openings for Confined 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

table of contents

INSTALLATION REqUIREMENTS - COMMONWEALTH OF
MASSACHUSETTS ..................................................................... 22
DIRECT VENT DIAGRAM ........................................................... 30
TEMPERATURE REGULATION ................................................. 36
CONTROL SYSTEM OPERATION ............................................. 37
FOR YOUR INFORMATION ........................................................ 45
PERIODIC MAINTENANCE ........................................................ 46
LEAkAGE CHECkPOINTS ......................................................... 48
TROUBLESHOOTING ................................................................ 49
LIMITED RESIDENTIAL GAS WARRANTY ................................ 55
2
Condensate Piping .................................................................. 18
High Altitude Installations......................................................... 19
Filling the Water Heater ........................................................... 19
Venting ..................................................................................... 20
Termination Clearances Sidewall Power Vent ......................... 23
Termination Clearances Sidewall Direct Vent .......................... 24
Installation Sequence .............................................................. 25
Vent Pipe Preparation .............................................................. 31
Controls and Switches ............................................................. 33
Overview .................................................................................. 37
Control System Navigation ...................................................... 37
User Settings & Control System Menus .................................. 40
Start Up Conditions.................................................................. 45
Operational Conditions ............................................................ 45
Venting System Inspection ...................................................... 46
Anode Rod Inspection ............................................................. 46
Temperature-Pressure Relief Valve Test ................................. 46
Draining and Flushing .............................................................. 47
Service ..................................................................................... 47
Installation Checklist ................................................................ 49
Sequence of Operation Flow Chart ......................................... 50
Operational Problems .............................................................. 51
Fault and Alert Conditions........................................................ 51