2
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
Qualications .....................................................................................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 Conguration .........................................................................21
Direct Vent Conguration ..........................................................................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