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Supply Gas Regulator Installation ................................................... 38
Electrical Wiring ............................................................................... 39
Power Supply Connections ......................................................................39
Enable/Disable Circuit ..............................................................................39
Water Line Connections .................................................................. 40
T&P Valve Discharge Pipe ............................................................... 40
TEMPERATURE REGULATION .......................................................... 41
High Temperature Limit Control (ECO) ............................................ 41
Thermostat Control .......................................................................... 41
CONTROL SYSTEM OPERATION ...................................................... 42
Control System Navigation .............................................................. 42
The Desktop Screen .................................................................................42
Status Icons ..............................................................................................43
User Settings & Control System Menus .......................................... 45
Temperatures Menu ..................................................................................45
Heater Status Menu ..................................................................................46
Display Settings ........................................................................................47
Heater Information ....................................................................................47
Current Fault .............................................................................................48
Fault History .............................................................................................48
Fault Occurrence ......................................................................................48
Restore Factory Defaults ..........................................................................48
Service Contact Information .....................................................................49
START UP ............................................................................................ 50
Initial Start Up .................................................................................. 50
Supply Gas Pressure Adjustment .............................................................51
Manifold Gas Pressure Adjustment ..........................................................51
Checking The Firing Rate ................................................................ 52
High Altitude Installations ................................................................ 52
LIGHTING THE WATER HEATER ....................................................... 53
Lighting & Operation Label .............................................................. 53
TROUBLESHOOTING ......................................................................... 54
Installation Checklist ........................................................................ 54
Sequence Of Operation ................................................................... 54
Sequence Of Operation Flow Chart ................................................ 55
Operational Problems ...................................................................... 56
Rough Starting, Rough Operation ............................................................56
Momentary Ignition ...................................................................................56
Not Enough Or No Hot Water ...................................................................56
Fault And Alert Conditions ............................................................... 57
Fault Conditions ........................................................................................57
Alert Conditions ........................................................................................57
Resetting Control System Lock Outs ........................................................57
Diagnostic Checks ....................................................................................57
Fault And Alert Messages .........................................................................58
MAINTENANCE ................................................................................... 60
Maintenance Schedule .................................................................... 60
DIAGRAMS .......................................................................................... 63
CCB - Central Control Board Layout ............................................... 63
(A)HCG3 130T 300 Wiring Diagram ................................................ 64
(A)HCG3 130T 400 Wiring Diagram ................................................ 65
Circulation Pump Wiring Diagrams .................................................. 66
Water Piping Diagrams .................................................................... 67
LIMITED WARRANTY .......................................................................... 74
TABLE OF CONTENTS
SAFE INSTALLATION, USE AND SERVICE.......................................... 3
GENERAL SAFETY INFORMATION ...................................................... 4
Precautions ........................................................................................ 4
INTRODUCTION .................................................................................... 6
Qualications ..................................................................................... 6
Preparing For The Installation ........................................................... 6
FEATURES AND COMPONENTS ......................................................... 7
Basic Operation ................................................................................. 7
Top View ............................................................................................ 8
Side Views ......................................................................................... 9
INSTALLATION CONSIDERATIONS ................................................... 10
Rough In Dimensions ...................................................................... 10
Recovery Capacities ........................................................................ 10
Locating The Water Heater ...............................................................11
Clearance To Combustible Materials ........................................................11
Service Clearance ....................................................................................11
Insulation Blankets .......................................................................... 12
INSTALLATION REQUIREMENTS ...................................................... 13
Gas Pressure Requirements ........................................................... 13
Supply Gas Line .............................................................................. 13
Supply Gas Regulator ..................................................................... 13
Power Supply .................................................................................. 13
Mixing Valves ................................................................................... 14
Dishwashing Machines .................................................................... 14
Closed Water Systems .................................................................... 14
Thermal Expansion .......................................................................... 14
Temperature-Pressure Relief Valve ................................................. 15
Condensate Drain ............................................................................ 16
Air Requirements ............................................................................. 17
Commonwealth of Massachusetts ................................................... 20
VENTING INSTALLATION ................................................................... 21
General Venting Information ............................................................ 21
Category IV Appliance ..............................................................................21
Power Vent Conguration .........................................................................21
Direct Vent Conguration ..........................................................................21
General Venting Instructions ........................................................... 21
Venting Requirements ..................................................................... 22
Maximum Equivalent Lengths ..................................................................22
Minimum Equivalent Lengths ...................................................................22
Maximum Number Of Elbows ...................................................................22
Venting Installation Sequence ......................................................... 23
Power Vent Installation .................................................................... 23
Direct Vent Installation ..................................................................... 23
Vertical Termination Installation ....................................................... 24
Sidewall Termination Installation...................................................... 26
Concentric Termination Installation .................................................. 27
Multiple Concentric Termination Clearances ...........................................30
Multiple Concentric Termination Arrangements ........................................31
Venting Arrangements ..................................................................... 32
Termination Clearances Sidewall Power Vent ................................. 34
Termination Clearances Sidewall Direct Vent .................................. 35
WATER HEATER INSTALLATION ........................................................ 36
Condensate Drain Installation ......................................................... 36
Supply Gas Line Installation ............................................................ 37