
2
TABLE OF CONTENTS
SAFE INSTALLATION, USE AND SERVICE.................................3
APPROVALS .................................................................................3
GENERAL SAFETY INFORMATION.............................................4
Precautions ..............................................................................4
Grounding Instructions .............................................................4
INSTALLATION REQUIREMENTS FOR MASSACHUSETTS
.........7
INTRODUCTION...........................................................................8
Abbreviations Used ..................................................................8
Qualications............................................................................8
Preparing For The Installation ..................................................8
DIMENSIONS AND CAPACITY DATA...........................................9
Rough In Dimensions: All Models.............................................9
FEATURES AND COMPONENTS ..............................................11
34 Gallon Unit.........................................................................11
50 Gallon Unit.........................................................................12
Controls And Switches ...........................................................14
INSTALLATION CONSIDERATIONS ..........................................15
Locating The Water Heater ....................................................15
Insulation Blankets .................................................................16
Combustion Air And Ventilation ..............................................16
Corrosion and Water Quality ..................................................16
INSTALLATION REQUIREMENTS .............................................17
Gas Supply Systems ..............................................................17
Supply Gas Regulator ............................................................17
Power Supply .........................................................................17
Mixing Valves..........................................................................18
Circulation Pumps ..................................................................18
Dishwashing Machines...........................................................18
Space Heating And Potable Water System............................19
Storage Tank Installation ........................................................19
Solar Installation.....................................................................19
Closed Water Systems ...........................................................19
Thermal Expansion ................................................................19
Temperature-Pressure Relief Valve........................................20
Condensate Drain ..................................................................21
VENTING INSTALLATION ..........................................................22
Vent Installation Considerations .............................................22
General Venting Instructions ..................................................22
Approved Vent/Intake Material ...............................................22
Polypropylene Installations.....................................................23
Vent Pipe Termination.............................................................23
Planning The Vent System .....................................................23
Integrated Filter Installation ....................................................24
Direct Vent Air Intake Moisture Protection..............................25
Horizontal Vent Terminal Installation ......................................25
Vertical Vent Terminal Installation...........................................26
Termination Clearances Sidewall Direct Vent.........................27
Direct Vent Installation Diagrams ...........................................28
Concentric Vent Installation....................................................29
Venting Multiple Units.............................................................30
WATER HEATER INSTALLATION...............................................31
Condensate Drain Installation ................................................31
Supply Gas Line Installation...................................................31
Gas Line Leak Testing............................................................32
Purging ...................................................................................32
Electrical Wiring......................................................................33
Water Line Connections .........................................................33
T&P Valve Discharge Pipe .....................................................34
TEMPERATURE REGULATION .................................................35
High Temperature Limit Control (ECO)...................................35
Thermostat Control.................................................................35
CONTROL SYSTEM OPERATION .............................................36
Overview ................................................................................36
Control System Navigation.....................................................36
User Settings & Control System Menus .................................39
START UP ...................................................................................44
Start Up Conditions ................................................................44
Prior to Start Up......................................................................44
Filling the Water Heater..........................................................44
Initial Start Up.........................................................................45
LIGHTING THE WATER HEATER ..............................................46
Lighting & Operation Labels ...................................................46
Checking the Firing Rate........................................................47
Gas Input Rate .......................................................................47
High Altitude Installations .......................................................47
TROUBLESHOOTING ................................................................48
Installation Checklist...............................................................48
Sequence Of Operation..........................................................48
Sequence Of Operation Flow Chart .......................................49
Operational Problems.............................................................50
Fault And Alert Conditions ......................................................51
LEAKAGE CHECKPOINTS.........................................................53
PERIODIC MAINTENANCE........................................................54
Venting System Inspection .....................................................54
Ingegrated Filter Preventative Maintenance...........................54
Temperature-Pressure Relief Valve Test ................................54
Draining and Flushing ............................................................55
Service ...................................................................................55
DIAGRAMS .................................................................................56
CCB-Central Control Board Layout ........................................56
Wiring Diagram.......................................................................57
Circulation Pump Wiring Diagrams ........................................58
Piping Diagrams .....................................................................59
NOTES ........................................................................................61