American Water Heater COMMERCIAL ELECTRIC WATER HEATERS guide

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

Page 44

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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 INTRODUCTION INSTRUCTION MANUAL TOOLS REQUIRED THERMAL 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 MODELS SURFACE MOUNT CONTROL MODELS WATER HEATER CONSTRUCTION ELECTRONIC CONTROL MODELS OPERATION & SERVICE PRINCIPLES OF ELECTRICITYVoltage Amperage Calculating Amps/Ohms/Volts/Watts Ohms Law applied to “SINGLE PHASE” 1Ø powerOhms Law SINGLE AND THREE PHASE POWER L1 L2 L3 Checking Single Phase 1Ø Power Checking 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 Block Surface Mount Control Models Single Phase to Three Phase PHASE CONVERSIONS - SURFACE MOUNT CONTROL MODELSSurface Mount Control Models Three Phase to Single Phase Electronic Control Models Single Phase to Three Phase PHASE CONVERSIONS - ELECTRONIC CONTROL MODELSElectronic Control Models Three Phase to Single Phase Volt Meter Method FUSESOhm Meter Method SURFACE MOUNT THERMOSTATS Thermostat & ECO Test Wire conductor inside tube HEATING ELEMENTSHeating Element Construction Heating Element Configurations NUMBER OF FACTORY INSTALLEDHeating Element Ratings TOTAL Heating Element Amperage ELEMENTAPPROXIMATE CURRENT - AMPS 208 VAC Heating Element Amperage Test Heating Element Voltage Test Heating Element Resistance & Ground Tests Measuring Resistance Heating Element Ground Test Replacing Heating Elements ELEMENT SENSORS Element Sensor ConstructionElement Sensor Three Current Sensors Element Sensor Functions Element Sensor Operation CONTACTORS Contactor Construction - How They Work Contactor Configurations Power Connection TerminalsElement Numbers/Connections Wire Colors to Elements Contactors Contactor Inspection Physically Operate Mechanical Contactor 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 Winding Secondary Winding Voltage Test 120 VAC Control Circuit Transformer TestPrimary Winding Voltage Test 24 VAC Transformer Test Temperature Sensor ECO High Temperature Limit SwitchIMMERSION TEMPERATURE PROBE Temperature Sensor Resistance Test Temperature Sensor Resistance DataChecking Temperature Sensor Resistance WATER TEMPERATURE Temperature Sensor DC Voltage Test ECO Continuity TestChecking ECO Switch Continuity DC Voltage To Temperature Sensor ECO Voltage Test 120 VAC To ECO120 VAC From ECO Ground Connection ELECTRONIC CONTROLS UIM User Interface Module CCB Central Control Board CCB - 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 Coils J7 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 Bank CCB 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 Front CONTROL SYSTEM FEATURES ELECTRONIC CONTROL SYSTEMCONTROL SYSTEM NAVIGATION UIM - User Interface Module THE DESKTOP SCREEN Table 1 Status Icons ICON Table 2 - Operating States Table 3 - Control System MenusSTATE MENUS† Differential Settings TEMPERATURES MENUOperating Set Point Tank Temperature Temperature Settings Enable / Disable 1 Alarm ConditionAlarm Relay Output HEATER STATUS MENU ECONOMY MODE SETUP MENU Setpoint AdjustmentDesktop Screen During Economy Mode Economy Mode Setup Menu Current Time Economy Mode Settings Setpoint Adjustment Value Economy Mode Settings Time Clock Settings Normal Operation Between Economy Mode Settings Daily Operating Mode SettingsEconomy Mode All Day ALARM OUTPUT SETUP MENU Temp Alarm SP Used for externalAlarm SP Alarm Output Settings DISPLAY SETTINGS MENU Display SettingsTemperature Units Backlight Delay HEATER INFORMATION MENU Elapsed TimeTotal Heating Time Bank # Cycles CURRENT FAULT / ALERT MENU FAULT HISTORY MENUFAULT OCCURRENCE MENU Main Menu - Current Fault Selected Fault History Menu Factory Default User Settings RESTORE FACTORY DEFAULTS MENURestore Factory Defaults TROUBLESHOOTING COMMON SERVICE PROBLEMSNo Hot Water Not Enough Hot Water Fault Conditions Resetting Control SystemCONTROL SYSTEM UNRESPONSIVE Alert Conditions UIM is Inoperable Heating Cycle DisabledControl System Unresponsive cont FAULT AND ALERT MESSAGES “No Current Detected” “Temp Probe Short” Fault & Alert Messages“Temp Probe Open” “Energy Cut Out ECO” Page Page Page Page Technical Support and Parts

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

CCB - CENTRAL CONTROL BOARD