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table of contents
TABLE OF CONTENTS ........................................................................2
SAFE INSTALLATION, USE AND SERvICE........................................3
APPROvALS ........................................................................................3
GENERAL SAFETY INFORMATION ....................................................4
Precautions .....................................................................................4
Grounding Instructions ...................................................................4
Hydrogen Gas Flammable ..............................................................4
TROUBLESHOOTING .........................................................................6
INTRODUCTION ..................................................................................7
Abbreviations Used ........................................................................7
Qualications ..................................................................................7
Qualied Installer or Service Agency ........................................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
Unusually Tight Construction ..................................................12
Conned Space ............................................................................12
Direct Vent Appliances ...........................................................12
Exhaust Fans .........................................................................12
Louvers and Grilles ................................................................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
INSTALLING THE NEW WATER HEATER ........................................14
Chemical Vapor Corrosion ............................................................14
Water Piping .................................................................................14
Power Supply ...............................................................................14
Power Fluctuations and Electrical Noise ................................14
Dedicated Power Wiring and Breakers ..................................14
Polarity Sensitive ....................................................................14
Mixing valves ................................................................................15
Dishwashing Machines .................................................................15
Space Heating and Potable Water System ..................................15
Closed Water Systems .................................................................15
Thermal Expansion .......................................................................16
Temperature-Pressure Relief valve ..............................................17
T&P Valve Discharge Pipe Requirements: .............................17
Gas Piping ....................................................................................18
Condensate Piping .......................................................................18
High Altitude Installations .......................................................19
Sediment Traps ......................................................................19
Filling the Water Heater ................................................................19
venting ..........................................................................................20
vent Pipe Termination ............................................................20
Planning the vent System ......................................................20
Installation of vent System .....................................................21
Vent Terminal Installation, Sidewall ........................................21
Installation Requirements - Commonwealth of Massachusetts ....22
Termination Clearances Sidewall Power Vent ..............................23
Termination Clearances Sidewall Direct Vent ...............................24
Sequence of Installations, Figure 18A ....................................25
Direct Vent Terminal Installation .............................................25
Installation Sequence .............................................................25
Vent Terminals Supplied with Heater Must be Used. .............25
Vertical Vent Terminal Installation ...........................................26
Concentric Vent Installation ....................................................27
Kit Components ......................................................................27
Safety Considerations ............................................................27
Installation Procedure 1 Roof Termination, see Figure C ......27
DIRECT vENT DIAGRAM ..................................................................30
vent Pipe Preparation...................................................................31
Primer .....................................................................................31
Primer and Cement ................................................................31
Applicators ..............................................................................31
Controls and Switches ..................................................................33
Blower Prover Switch .............................................................33
Blocked Exhaust Switch .........................................................33
Blocked Intake Switch ............................................................33
On/Off Switch .........................................................................33
Hot Surface Igniter .................................................................33
TEMPERATURE REGULATION ........................................................36
Hi Limit Switch (E.C.O.) ................................................................36
CONTROL SYSTEM OPERATION ....................................................37
Overview .......................................................................................37
Commercial And Residential Models ......................................37
Control System Navigation ...........................................................37
User Input Buttons ..................................................................37
The Desktop Screen ...............................................................37
Status Icons ............................................................................38
Operating States ....................................................................39
Control System Menus ...........................................................39
User Settings & Control System Menus .......................................40
Temperatures .........................................................................40
Operating Set Point And Differential Adjustment ....................40
Temperatures (cont) ...............................................................41
Heater Status .........................................................................41
Display Settings ......................................................................42
Heater Information ..................................................................42
Current Fault ..........................................................................43
Fault History ...........................................................................43
Fault Occurrence ....................................................................43
Restore Factory Defaults ........................................................43
Service Contact Information ...................................................44
FOR YOUR INFORMATION ...............................................................45
Start Up Conditions ......................................................................45
Smoke/Odor ...........................................................................45
Thermal Expansion ................................................................45
Operational Conditions .................................................................45
Smelly Water ..........................................................................45
“Air” in Hot Water Faucet ........................................................45
PERIODIC MAINTENANCE ...............................................................46
Venting System Inspection ...........................................................46
Anode Rod Inspection ..................................................................46
Temperature-Pressure Relief valve Operation .............................46
Draining and Flushing ...................................................................46
To Drain the Water Heater Storage Tank ......................................47
To Flush the Water Heater Storage Tank ......................................47
Service ..........................................................................................47
MAINTENANCE .................................................................................48
Temperature-Pressure Relief valve Test ......................................48
LEAKAGE CHECKPOINTS ................................................................49
TROUBLESHOOTING .......................................................................50
Installation Checklist .....................................................................50
Water Heater Location............................................................50
venting ...................................................................................50
Gas Supply and Piping ...........................................................50
Condensate Drain ..................................................................50
Electrical Connections ............................................................50
Sequence Of Operation Flow Chart .............................................51
Operational Problems ...................................................................52
Rough Starting, Rough Operation ..........................................52
Momentary Ignition .................................................................52
Not Enough Or No Hot Water .................................................52
Water Is Too Hot .....................................................................52
Noisy Operation ......................................................................52
Replacement Parts .................................................................52
Fault and Alert Conditions ............................................................52
Fault Conditions .....................................................................52
Alert Conditions ......................................................................52
Resetting Control System Lock Outs .....................................53
Diagnostic Checks ..................................................................53
Fault and Alert Messages .......................................................54
NOTES ...............................................................................................56
LIMITED WARRANTY ........................................................................59