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Water Heater
American Water Heater
COMMERCIAL ELECTRIC WATER HEATERS, ITCE3-52/80/119, STCE3-52/80/119 manual
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Contents
Main
Service Handbook
commercial electric Water HeaterS
Page
COMMERCIAL ELECTRIC WATER HEATER
SERVICE MANUAL
TABLE OF CONTENTS
INTRODUCTION
QUALIFICATIONS - QUALIFIED SERVICE AGENT
SERVICE WARNING
IMPORTANT SERVICE REMINDER
INSTRUCTION MANUAL
TOO LS RE QUIR ED
INSTALLATION CONSIDERATIONS
CLOSED WATER SYSTEMS
THERMAL EXPANSION
ELECTRICAL REQUIREMENTS
PRE SERVICE CHECKS
WIRING CONNECTIONS
SERVICE PRECAUTIONS
WATER HEATER CONSTRUCTION
SURFACE MOUNT CONTROL MODELS
ELECTRONIC CONTROL MODELS
HEATING ELEMENT CONFIGURATIONS
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OPERATION & SERVICE
PRINCIPLES OF ELECTRICITY
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SINGLE AND THREE PHASE POWER
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PHASE CONVERSIONS - SURFACE MOUNT CONTROL MODELS
PHASE CONVERSIONS - ELECTRONIC CONTROL MODELS
FUSES
SURFACE MOUNT THERMOSTATS
Thermostat & ECO Test
HEATING ELEMENTS
Wire conductor inside tube
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Service Note:
DO NOT TOUCH THE ENDS OF ANY HEATING ELMENTS WHILE PERFORMING THIS TEST
DO NOT TOUCH THE ENDS OF ANY HEATING ELMENTS WHILE PERFORMING THIS TEST
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Heating Element Ground Test
Replacing Heating Elements
ELEMENT SENSORS
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CONTACTORS
Servicing should only be performed by a Qualified Service Agent 30
LEGEND
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Service Warning:
TRAN SFO RME RS
X1 X2 120 VAC
120 VAC Control Circuit Transformer Test
Service Note:
Primary Winding Voltage Test Secondary Winding Voltage Test
24 VAC Transformer Test
Primary Winding Voltage Test Secondary Winding Voltage Test
IMMERSION TEMPERATURE PROBE
Temperature Sensor Resistance Test
Temperature Sensor Resistance Data
Checking Temperature Sensor Resistance
WATER TEMPERATURE RESISTANCE IN OHMS
Temperature Sensor DC Voltage Test
ECO Continuity Test
Checking ECO Switch Continuity DC Voltage To Temperature Sensor
ECO Voltage Test
120 VAC To ECO 120 VAC From ECO
Ground Connection
ELECTRONIC CONTROLS
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ELECTRONIC CONTROLS
Checking for 120 VAC Checking for Ground
UIM - USER INTERFACE MODULE
UIM Circuit Board Back
UIM Circuit Board Front
LCD Screen
ELECTRONIC CONTROL SYSTEM
CONTROL SYSTEM FEATURES
UIM - User Interface Module
CONTROL SYSTEM NAVIGATION
THE DESKTOP SCREEN
Table 1 Status Icons
ICON DESCRIPTION
Table 2 - Operating States
Table 3 - Control System Menus
STATE DESCRIPTION
MENUS
DESCRIPTION
TEMPERATURES MENU
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HEATER STATUS MENU
ECONOMY MODE SETUP MENU
Setpoint Adjustment Value
Time Clock Settings
Daily Operating Mode Settings
Economy Mode All Day:
Normal Operation Between:
ALARM OUTPUT SETUP MENU
DISPLAY SETTINGS MENU
HEATER INFORMATION MENU
CURRENT FAULT / ALERT MENU
FAULT HISTORY MENU
FAULT OCCURRENCE MENU
RESTORE FACTORY DEFAULTS MENU
Factory Default User Settings
TEMPERATURES MENU DEFAULT SETTING ADJUSTABLE RANGE
ECONOMY MODE SETUP MENU DEFAULT SETTING ADJUSTABLE RANGE
ALARM OUTPUT SETUP MENU DEFAULT SETTING ADJUSTABLE RANGE
TROUBLESHOOTING
COMMON SERVICE PROBLEMS
No Hot Water
Not Enough Hot Water
Water Heater Trips Breaker
ELECTRONIC CONTROL MODELS
CONTROL SYSTEM UNRESPONSIVE
Control System Unresponsive (cont)
UIM is Inoperable
Heating Cycle Disabled
FAULT AND ALERT MESSAGES
No Current Detected
(Alert Condition)
Fault & Alert Messages
Temp Probe Open
Temp Probe Short
Fault & Alert Messages
Energy Cut Out (ECO)