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American Water Heater COMMERCIAL ELECTRIC WATER HEATERS manual Ccb - Central Control Board

Models: ITCE3-52/80/119 COMMERCIAL ELECTRIC WATER HEATERS STCE3-52/80/119

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ELECTRONIC CONTROLS

CCB - CENTRAL CONTROL BOARD

All wiring connections and sockets will be identified in the following pages. The Troubleshooting section of this manual will refer to this illustration and information.

Servicing should only be performed by a Qualified Service Agent

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American Water Heater COMMERCIAL ELECTRIC WATER HEATERS, STCE3-52/80/119, ITCE3-52/80/119 manual Ccb - Central Control Board

Contents

Service Handbook COMMERCIAL ELECTRIC WATER HEATERSMODELS STCE3-52/80/119 & ITCE3-52/80/119 Technical Support and PartsPage COMMERCIAL ELECTRIC WATER HEATER TABLE OF CONTENTSSERVICE MANUAL QUALIFICATIONS - QUALIFIED SERVICE AGENT SERVICE WARNINGIMPORTANT SERVICE REMINDER INTRODUCTIONINSTRUCTION MANUAL TOOLS REQUIREDTHERMAL EXPANSION INSTALLATION CONSIDERATIONSCLOSED WATER SYSTEMS Grounding Power SupplyELECTRICAL REQUIREMENTS SERVICE PRECAUTIONS PRE SERVICE CHECKSWIRING CONNECTIONS HEATING ELEMENT CONFIGURATIONS WATER HEATER CONSTRUCTIONSURFACE MOUNT CONTROL MODELS ELECTRONIC CONTROL MODELSSURFACE MOUNT CONTROL MODELS WATER HEATER CONSTRUCTIONELECTRONIC CONTROL MODELS WATER HEATER CONSTRUCTIONOPERATION & SERVICE PRINCIPLES OF ELECTRICITYVoltage AmperageCalculating Amps/Ohms/Volts/Watts Ohms Law applied to “SINGLE PHASE” 1Ø powerOhms Law SINGLE AND THREE PHASE POWER L1 L2 L3Checking Single Phase 1Ø Power Power Distribution Block277 Volt 1Ø Power 208/240/480 Volt 1Ø PowerChecking Three Phase 3Ø Power 1 L1 and L2 terminals of the water heater’s Power Distribution Block2 L2 and L3 terminals of the water heater’s Power Distribution Block 3 L1 and L3 terminals of the water heater’s Power Distribution BlockPHASE CONVERSIONS - SURFACE MOUNT CONTROL MODELS Surface Mount Control Models Three Phase to Single PhaseSurface Mount Control Models Single Phase to Three Phase L1 L2 L3PHASE CONVERSIONS - ELECTRONIC CONTROL MODELS Electronic Control Models Three Phase to Single PhaseElectronic Control Models Single Phase to Three Phase L1 L2 L3Volt Meter Method FUSESOhm Meter Method SURFACE MOUNT THERMOSTATS Thermostat & ECO Test OPERATION & SERVICEWire conductor inside tube HEATING ELEMENTSHeating Element Construction Heating Element Configurations NUMBER OF FACTORY INSTALLEDHeating Element Ratings TOTALHeating Element Amperage ELEMENTAPPROXIMATE CURRENT - AMPS 208 VACHeating Element Amperage Test Heating Element Voltage Test Heating Element Resistance & Ground Tests Measuring ResistanceOPERATION & SERVICE Heating Element Ground TestReplacing Heating Elements ELEMENT SENSORS Element Sensor ConstructionElement Sensor Three Current Sensors Element Sensor FunctionsElement Sensor Operation CONTACTORS Contactor Construction - How They WorkContactor Configurations Power Connection TerminalsElement Numbers/Connections Wire Colors to Elements ContactorsContactor Inspection Physically Operate MechanicalContactor Coil Voltage - At Contactor Contactor Coil Voltage - At CCB 120 VAC Control Circuit Transformer Wiring X1 120 VACTRANSFORMERS H1 H2 H3 H4 H5 N/A Primary Winding Secondary Winding120 VAC Control Circuit Transformer Test OPERATION & SERVICEPrimary Winding Voltage Test Secondary Winding Voltage Test24 VAC Transformer Test OPERATION & SERVICEPrimary Winding Voltage Test Secondary Winding Voltage TestTemperature Sensor ECO High Temperature Limit SwitchIMMERSION TEMPERATURE PROBE Temperature Sensor Resistance Test Temperature Sensor Resistance DataOPERATION & SERVICE Checking Temperature Sensor ResistanceTemperature Sensor DC Voltage Test ECO Continuity TestOPERATION & SERVICE Checking ECO Switch ContinuityECO Voltage Test OPERATION & SERVICE120 VAC To ECO 120 VAC From ECOELECTRONIC CONTROLS UIM User Interface Module CCB Central Control BoardCCB - CENTRAL CONTROL BOARD CCB Socket & Wiring Terminal Identification J2 Socket - 120 VAC Power SupplyJ3 Wiring Terminals - Alarm Output Relay see page J4 Wiring Terminals - Contactor CoilsJ7 Socket - Enable / Disable Circuits 1 & 2 see pages 45 J16 Socket - Not Used J17 Wiring Terminals - Not UsedJ8 Socket - Not Used J9 Socket - Not Used J10 Socket - Not Used J13 Socket - Heating Element Sensors BankCCB Enable/Disable Circuits Test Checking for Ground Checking Power and Ground To The CCBChecking for 120 VAC Service Notes - Button Pad Ribbon Cable UIM - USER INTERFACE MODULEUIM Circuit Board Back UIM Circuit Board FrontCONTROL SYSTEM FEATURES ELECTRONIC CONTROL SYSTEMCONTROL SYSTEM NAVIGATION UIM - User Interface ModuleTHE DESKTOP SCREEN Table 1 Status Icons ELECTRONIC CONTROL SYSTEMICON DESCRIPTIONTable 2 - Operating States Table 3 - Control System MenusELECTRONIC CONTROL SYSTEM STATEDifferential Settings TEMPERATURES MENUOperating Set Point Tank TemperatureTemperature Settings Enable / Disable 1 Alarm ConditionAlarm Relay Output HEATER STATUS MENUECONOMY MODE SETUP MENU Setpoint AdjustmentDesktop Screen During Economy Mode Economy Mode Setup Menu Current TimeEconomy Mode Settings Setpoint Adjustment Value ELECTRONIC CONTROL SYSTEMACTION DISPLAYEconomy Mode Settings Time Clock Settings ELECTRONIC CONTROL SYSTEMACTION DISPLAYEconomy Mode Settings Daily Operating Mode Settings ELECTRONIC CONTROL SYSTEMACTION DISPLAYALARM OUTPUT SETUP MENU Temp Alarm SP Used for externalAlarm SP Alarm Output SettingsDISPLAY SETTINGS MENU Display SettingsTemperature Units Backlight DelayHEATER INFORMATION MENU Elapsed TimeTotal Heating Time Bank # CyclesCURRENT FAULT / ALERT MENU FAULT HISTORY MENUFAULT OCCURRENCE MENU Main Menu - Current Fault Selected Fault History MenuFactory Default User Settings RESTORE FACTORY DEFAULTS MENURestore Factory Defaults TROUBLESHOOTING COMMON SERVICE PROBLEMSNo Hot Water Not Enough Hot WaterFault Conditions Resetting Control SystemCONTROL SYSTEM UNRESPONSIVE Alert ConditionsHeating Cycle Disabled Control System Unresponsive contUIM is Inoperable TROUBLESHOOTINGFAULT AND ALERT MESSAGES “No Current Detected”“Temp Probe Short” Fault & Alert Messages“Temp Probe Open” “Energy Cut Out ECO” Fault & Alert MessagesTROUBLESHOOTING Fault ConditionPage Page Page Page Technical Support and Parts