American Water Heater COMMERCIAL ELECTRIC WATER HEATERS guide

NOTES

Image 74

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

Contents

MODELS STCE3-52/80/119 & ITCE3-52/80/119 Service HandbookCOMMERCIAL ELECTRIC WATER HEATERS Technical Support and PartsPage COMMERCIAL ELECTRIC WATER HEATER TABLE OF CONTENTSSERVICE MANUAL IMPORTANT SERVICE REMINDER QUALIFICATIONS - QUALIFIED SERVICE AGENTSERVICE WARNING INTRODUCTION INSTRUCTION MANUAL TOOLS REQUIRED THERMAL EXPANSION INSTALLATION CONSIDERATIONSCLOSED WATER SYSTEMS Grounding Power SupplyELECTRICAL REQUIREMENTS SERVICE PRECAUTIONS PRE SERVICE CHECKSWIRING CONNECTIONS SURFACE MOUNT CONTROL MODELS HEATING ELEMENT CONFIGURATIONSWATER HEATER CONSTRUCTION ELECTRONIC CONTROL MODELS SURFACE MOUNT CONTROL MODELS WATER HEATER CONSTRUCTION ELECTRONIC CONTROL MODELS Voltage OPERATION & SERVICEPRINCIPLES OF ELECTRICITY 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 2 L2 and L3 terminals of the water heater’s Power Distribution Block Checking Three Phase 3Ø Power1 L1 and L2 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 Ratings Heating Element ConfigurationsNUMBER OF FACTORY INSTALLED TOTAL APPROXIMATE CURRENT - AMPS Heating Element AmperageELEMENT 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 Sensor ELEMENT SENSORSElement Sensor Construction Three Current Sensors Element Sensor Functions Element Sensor Operation CONTACTORS Contactor Construction - How They Work Element Numbers/Connections Wire Colors to Elements Contactor ConfigurationsPower Connection Terminals Contactors Contactor Inspection Physically Operate Mechanical Contactor Coil Voltage - At Contactor Contactor Coil Voltage - At CCB TRANSFORMERS 120 VAC Control Circuit Transformer WiringX1 120 VAC 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 Checking Temperature Sensor Resistance Temperature Sensor Resistance TestTemperature Sensor Resistance Data WATER TEMPERATURE Checking ECO Switch Continuity Temperature Sensor DC Voltage TestECO Continuity Test DC Voltage To Temperature Sensor 120 VAC From ECO ECO Voltage Test120 VAC To ECO Ground Connection ELECTRONIC CONTROLS UIM User Interface Module CCB Central Control Board CCB - CENTRAL CONTROL BOARD J3 Wiring Terminals - Alarm Output Relay see page CCB Socket & Wiring Terminal IdentificationJ2 Socket - 120 VAC Power Supply J4 Wiring Terminals - Contactor Coils J8 Socket - Not Used J9 Socket - Not Used J10 Socket - Not Used J7 Socket - Enable / Disable Circuits 1 & 2 see pages 45J16 Socket - Not Used J17 Wiring Terminals - 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 UIM Circuit Board Back Service Notes - Button Pad Ribbon CableUIM - USER INTERFACE MODULE UIM Circuit Board Front CONTROL SYSTEM NAVIGATION CONTROL SYSTEM FEATURESELECTRONIC CONTROL SYSTEM UIM - User Interface Module THE DESKTOP SCREEN Table 1 Status Icons ICON STATE Table 2 - Operating StatesTable 3 - Control System Menus MENUS† Operating Set Point Differential SettingsTEMPERATURES MENU Tank Temperature Temperature Settings Alarm Relay Output Enable / Disable 1Alarm Condition HEATER STATUS MENU Desktop Screen During Economy Mode Economy Mode Setup Menu ECONOMY MODE SETUP MENUSetpoint Adjustment 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 SP ALARM OUTPUT SETUP MENUTemp Alarm SP Used for external Alarm Output Settings Temperature Units DISPLAY SETTINGS MENUDisplay Settings Backlight Delay Total Heating Time HEATER INFORMATION MENUElapsed Time Bank # Cycles FAULT OCCURRENCE MENU CURRENT FAULT / ALERT MENUFAULT HISTORY MENU Main Menu - Current Fault Selected Fault History Menu Factory Default User Settings RESTORE FACTORY DEFAULTS MENURestore Factory Defaults No Hot Water TROUBLESHOOTINGCOMMON SERVICE PROBLEMS Not Enough Hot Water CONTROL SYSTEM UNRESPONSIVE Fault ConditionsResetting Control System 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