Service Handbook

COMMERCIAL ELECTRIC WATER HEATERS

Technical Support and Parts: 800-456-9805

www.americanwaterheater.com

MODELS STCE3-52/80/119 & ITCE3-52/80/119

INSTALLATION CONSIDERATIONS - PRE SERVICE CHECKS - WATER HEATER CONSTRUCTION - OPERATION & SERVICE - TROUBLESHOOTING

Servicing should only be performed by a Qualified Service Agent.

PRINTED IN THE U.S.A 1008	1	315016-000
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American Water Heater ITCE3-52/80/119 manual Commercial Electric Water Heaters, Service Handbook, Printed In The U.S.A

Contents

COMMERCIAL ELECTRIC WATER HEATERS Service HandbookMODELS STCE3-52/80/119 & ITCE3-52/80/119 Technical Support and PartsPage SERVICE MANUAL TABLE OF CONTENTSCOMMERCIAL ELECTRIC WATER HEATER SERVICE WARNING QUALIFICATIONS - QUALIFIED SERVICE AGENTIMPORTANT SERVICE REMINDER INTRODUCTION TOOLS REQUIRED INSTRUCTION MANUAL CLOSED WATER SYSTEMS INSTALLATION CONSIDERATIONSTHERMAL EXPANSION ELECTRICAL REQUIREMENTS Power SupplyGrounding WIRING CONNECTIONS PRE SERVICE CHECKSSERVICE PRECAUTIONS WATER HEATER CONSTRUCTION HEATING ELEMENT CONFIGURATIONSSURFACE MOUNT CONTROL MODELS ELECTRONIC CONTROL MODELS WATER HEATER CONSTRUCTION SURFACE MOUNT CONTROL MODELS WATER HEATER CONSTRUCTION PRINCIPLES OF ELECTRICITY OPERATION & SERVICEVoltage Amperage Ohms Law Ohms Law applied to “SINGLE PHASE” 1Ø powerCalculating Amps/Ohms/Volts/Watts L1 L2 L3 SINGLE AND THREE PHASE POWER Checking Single Phase 1Ø Power 1 L1 and L2 terminals of the water heater’s Power Distribution Block Checking Three Phase 3Ø Power2 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 Three Phase to Single Phase PHASE CONVERSIONS - SURFACE MOUNT CONTROL MODELSSurface Mount Control Models Single Phase to Three Phase Electronic Control Models Three Phase to Single Phase PHASE CONVERSIONS - ELECTRONIC CONTROL MODELSElectronic Control Models Single Phase to Three Phase Ohm Meter Method FUSESVolt Meter Method SURFACE MOUNT THERMOSTATS Thermostat & ECO Test Heating Element Construction HEATING ELEMENTSWire conductor inside tube NUMBER OF FACTORY INSTALLED Heating Element ConfigurationsHeating Element Ratings TOTAL ELEMENT Heating Element AmperageAPPROXIMATE CURRENT - AMPS 208 VAC Heating Element Amperage Test Heating Element Voltage Test Measuring Resistance Heating Element Resistance & Ground Tests Replacing Heating Elements Heating Element Ground Test Element Sensor Construction ELEMENT SENSORSElement Sensor Three Current Sensors Element Sensor Functions Element Sensor Operation Contactor Construction - How They Work CONTACTORS Power Connection Terminals Contactor ConfigurationsElement Numbers/Connections Wire Colors to Elements Contactors Physically Operate Mechanical Contactor Inspection Contactor Coil Voltage - At Contactor Contactor Coil Voltage - At CCB X1 120 VAC 120 VAC Control Circuit Transformer WiringTRANSFORMERS H1 H2 H3 H4 H5 N/A Primary Winding Secondary Winding Primary Winding Voltage Test 120 VAC Control Circuit Transformer TestSecondary Winding Voltage Test 24 VAC Transformer Test IMMERSION TEMPERATURE PROBE ECO High Temperature Limit SwitchTemperature Sensor Temperature Sensor Resistance Data Temperature Sensor Resistance TestChecking Temperature Sensor Resistance WATER TEMPERATURE ECO Continuity Test Temperature Sensor DC Voltage TestChecking ECO Switch Continuity DC Voltage To Temperature Sensor 120 VAC To ECO ECO Voltage Test120 VAC From ECO Ground Connection UIM User Interface Module CCB Central Control Board ELECTRONIC CONTROLS CCB - CENTRAL CONTROL BOARD J2 Socket - 120 VAC Power Supply CCB Socket & Wiring Terminal IdentificationJ3 Wiring Terminals - Alarm Output Relay see page J4 Wiring Terminals - Contactor Coils J16 Socket - Not Used J17 Wiring Terminals - Not Used J7 Socket - Enable / Disable Circuits 1 & 2 see pages 45J8 Socket - Not Used J9 Socket - Not Used J10 Socket - Not Used J13 Socket - Heating Element Sensors Bank CCB Enable/Disable Circuits Test Checking for 120 VAC Checking Power and Ground To The CCBChecking for Ground UIM - USER INTERFACE MODULE Service Notes - Button Pad Ribbon CableUIM Circuit Board Back UIM Circuit Board Front ELECTRONIC CONTROL SYSTEM CONTROL SYSTEM FEATURESCONTROL SYSTEM NAVIGATION UIM - User Interface Module THE DESKTOP SCREEN ICON Table 1 Status Icons Table 3 - Control System Menus Table 2 - Operating StatesSTATE MENUS† TEMPERATURES MENU Differential SettingsOperating Set Point Tank Temperature Temperature Settings Alarm Condition Enable / Disable 1Alarm Relay Output HEATER STATUS MENU Setpoint Adjustment ECONOMY MODE SETUP MENUDesktop Screen During Economy Mode Economy Mode Setup Menu Current Time Economy Mode Settings Setpoint Adjustment Value Economy Mode Settings Time Clock Settings Economy Mode All Day Economy Mode Settings Daily Operating Mode SettingsNormal Operation Between Temp Alarm SP Used for external ALARM OUTPUT SETUP MENUAlarm SP Alarm Output Settings Display Settings DISPLAY SETTINGS MENUTemperature Units Backlight Delay Elapsed Time HEATER INFORMATION MENUTotal Heating Time Bank # Cycles FAULT HISTORY MENU CURRENT FAULT / ALERT MENUFAULT OCCURRENCE MENU Main Menu - Current Fault Selected Fault History Menu Restore Factory Defaults RESTORE FACTORY DEFAULTS MENUFactory Default User Settings COMMON SERVICE PROBLEMS TROUBLESHOOTINGNo Hot Water Not Enough Hot Water Resetting Control System Fault ConditionsCONTROL SYSTEM UNRESPONSIVE Alert Conditions Control System Unresponsive cont Heating Cycle DisabledUIM is Inoperable “No Current Detected” FAULT AND ALERT MESSAGES “Temp Probe Open” Fault & Alert Messages“Temp Probe Short” “Energy Cut Out ECO” Page Page Page Page Technical Support and Parts

Service Handbook

COMMERCIAL ELECTRIC WATER HEATERS

Technical Support and Parts: 800-456-9805

MODELS STCE3-52/80/119 & ITCE3-52/80/119

PRINTED IN THE U.S.A 1008

315016-000