Instruction/ maintenance manual of the product STCE3-52/80/119 American Water Heater
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1 Service Handbook PRINTED IN THE U . S .A 1008 3 1 50 16-000 SERVICING SHOULD ONL Y BE PERFORMED BY A QUALIFIED SER VICE AGENT . COMMERCIAL ELECTRIC W A TER HEA TERS MODEL S STCE3-52/80/1 19 & IT.
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COMMERCIAL ELECTRIC W ATER HEATER SERVICE MANUAL T ABLE OF CONTENT S INTRODUCTION ............. .................................................. ........ 2 Qualifications ...... ................. .............. .............. .............. ..... 2 Service W arning .
INTRODUCTION Servicing sh ould only be performe d by a Qualified Service Agent 2 INTRODUCTION This Service Manual is designed to be an ai d in servicing and troubleshooting the commercial electric water heater models listed on the cover .
Servicing shou ld only be performed by a Qualified Service Ag ent 3 INTRODUCTION INSTRUCTION MANUAL Have a copy of the Instructi on Manual that came with the water heat er on hand for the correct model water heat er you are working wi th before servicing.
INSTALLATION CONSIDERATIONS Servicing sh ould only be performe d by a Qualified Service Agent 4 INST ALLATION CONSIDERATIONS Installation inform ation given in th is Service Manual IS NOT a complete installation instruction. Installation inform ation covered in this Service Manual has a limited focus as it applies to servicing.
Servicing shou ld only be performed by a Qualified Service Ag ent 5 INSTALLATION CONSIDERATIONS ELECTRICAL REQUIREMENT S Grounding Review the electrical ground requirements given in the Inst ruction Manual th at came with the water heater and ensure the water heater has been properly grounded.
PRE SERVICE CHECKS Servicing sh ould only be performe d by a Qualified Service Agent 6 PRE SERVICE CHECKS WIRING CONNECTIONS With the power supply to t he water heater turned off ensur e the wiring co.
Servicing shou ld only be performed by a Qualified Service Ag ent 7 W ATER HEATER CONSTRUCTION W ATER HEATER CONSTRUCTION There are two types of commerci al electric water heaters cover ed in this manual . See Figure 1 on page 8 and Fi gure 2 on page 9.
W ATER HEATER CONSTRUCTION Servicing sh ould only be performe d by a Qualified Service Agent 8 SURFACE MOUNT CONTROL MODELS Figure 1.
Servicing shou ld only be performed by a Qualified Service Ag ent 9 W ATER HEATER CONSTRUCTION ELECTRONIC CONTROL MODELS Figure 2.
OPERATION & SERVICE Servicing sh ould only be performe d by a Qualified Service Agent 10 OPERATION & SERVICE This section of the manual will cover the princi ples of electricity , single a nd .
Servicing shou ld only be performed by a Qualified Service Ag ent 11 OPERATION & SERVICE Ohms Law A law that explains the relationship between voltage, current and resist ance. The law states that the electric curr ent flowing through a co nductor is equal to t he voltage divided by the resistance.
OPERATION & SERVICE Servicing sh ould only be performe d by a Qualified Service Agent 12 SINGLE AND THREE PHASE POWER The water heaters covered in this manual can be field converted for a single or three phase power supply - see pages 15 and 16.
Servicing shou ld only be performed by a Qualified Service Ag ent 13 OPERATION & SERVICE Checking Single Phase (1Ø) Power A single phase power su pply consists of two wires connec ted to the L1 and L2 terminals of the Power Distribution Block, t he L3 terminal is not used.
OPERATION & SERVICE Servicing sh ould only be performe d by a Qualified Service Agent 14 Checking Three Phase (3Ø) Power A three phase power supply consis ts of three wires connected to the L1, L2 and L3 terminals of the Power Distribution Bl ock.
Servicing shou ld only be performed by a Qualified Service Ag ent 15 OPERATION & SERVICE PHASE CONVERSIONS - SURF ACE MOUNT CONTROL MODELS Internal wiring connections bet ween the Power Distributi.
OPERATION & SERVICE Servicing sh ould only be performe d by a Qualified Service Agent 16 PHASE CONVERSIONS - ELEC TRONIC CONTROL MODELS Internal wiring connections bet ween the Power Distribution .
Servicing shou ld only be performed by a Qualified Service Ag ent 17 OPERATION & SERVICE FUSES The water heaters covered in this manual have power circui t fuses to protect the heating element circuits. Electronic C ontrol models will have two additional fuses to protect the primary winding of the 120 V olt Control Circuit T ransformer .
OPERATION & SERVICE Servicing sh ould only be performe d by a Qualified Service Agent 18 SURFACE MOUNT THERMOST AT S The Surface Mount Control Model water heaters covered in this manual have “se.
Servicing shou ld only be performed by a Qualified Service Ag ent 19 OPERATION & SERVICE Thermost at & ECO T est 1 Secure power to the water heater at the main breaker or disconnect switch. 2 Ensure tank temper ature is less than 100°F/38°C - dum p water to lo wer tank temperatur e if necessary .
OPERATION & SERVICE Servicing sh ould only be performe d by a Qualified Service Agent 20 HEATING ELEMENT S This section of the m anual provides informatio n on how to determine the actual voltage .
Servicing shou ld only be performed by a Qualified Service Ag ent 21 OPERATION & SERVICE Heating Element Ratings Heating elements are labeled with their vo lt age and KW rating - see image below . The element shown here is a 6000 watt (6 KW) 240 volt element.
OPERATION & SERVICE Servicing sh ould only be performe d by a Qualified Service Agent 22 Heating Element Amperage This table shows the approximat e amp draw for the various heating el ement s used. First determine the actual rated wattage and volt age of the element being tested - see Heating Element Ratings on page 21.
Servicing shou ld only be performed by a Qualified Service Ag ent 23 OPERATION & SERVICE Heating Element Amperage T est This test should be consi dered as a first diagnostic proc edure for the common service complaints of no hot water or not enough hot water .
OPERATION & SERVICE Servicing sh ould only be performe d by a Qualified Service Agent 24 Heating Element V olt age T est This test is typically perform ed after an amperage test (see p age 23) has determined one or more heating elements is not drawing corr ect amperage.
Servicing shou ld only be performed by a Qualified Service Ag ent 25 OPERATION & SERVICE Heating Element Resist ance & Ground T ests This is a two part test. In t he first part of this test the actual resist ance (ohms) of each heating element is measur ed.
OPERATION & SERVICE Servicing sh ould only be performe d by a Qualified Service Agent 26 Heating Element Ground T est 1 Secure power to the water heater at th e main breaker or disconnect switch .
Servicing shou ld only be performed by a Qualified Service Ag ent 27 OPERATION & SERVICE ELEMENT SENSORS Electronic Control Models covered in this manual monitor all h eating elements using Element Sensors. Each Elem ent Sensor monitors 3 heat ing elements.
OPERATION & SERVICE Servicing sh ould only be performe d by a Qualified Service Agent 28 Element Sensor Operation When current (amperag e) flows through a wire in an elec trical circuit a magnetic field is developed that radiates out from the wire.
Servicing shou ld only be performed by a Qualified Service Ag ent 29 OPERATION & SERVICE CONT ACTORS This section of the manual provides information on how contactors used on Electronic Control Models are constructed, how they work and how to test contactor operation - see Figure 2 on page 9 for location of the cont actors on these models.
OPERATION & SERVICE Servicing sh ould only be performe d by a Qualified Service Agent 30 Cont actor Configurations This illustration shows how contactors are configured and how they provide power .
Servicing shou ld only be performed by a Qualified Service Ag ent 31 OPERATION & SERVICE Cont actor Inspection A thorough visual inspecti on of the contactors used on Electronic Control Models should be performed as part of any regular maintenance program and whenever the water heater is being serviced.
OPERATION & SERVICE Servicing sh ould only be performe d by a Qualified Service Agent 32 Cont actor Coil V olt age - At Cont actor This test procedure will measure contactor coil vo lt age at the contactor . 1 Ensure tank temper ature is less than 100°F/38°C - dump wa ter to lo wer tank temperatur e if necessary .
Servicing shou ld only be performed by a Qualified Service Ag ent 33 OPERATION & SERVICE Cont actor Coil V oltage - At CCB This test procedure will measure contactor coil vo lt age where it originat es at the J4 wiring terminals on the CCB. See page 42 for the CCB’ s J4 wiring terminal location.
OPERATION & SERVICE Servicing sh ould only be performe d by a Qualified Service Agent 34 TR A N S F O R M E R S This section of the manual prov ides information on how to te st and ensure the multiple tap 120 V AC Control Circuit T ransform er is wired properly on Electr onic Control Models.
Servicing shou ld only be performed by a Qualified Service Ag ent 35 OPERATION & SERVICE 120 V AC Control Circuit T ransformer T est 1 Ensure the main breaker or disco nnect switch is turned on. 2 V erify with an AC volt meter that proper voltag e is present at the Power Distribution Block (see Figure 2 on page 9 an d pages 12 - 14).
OPERATION & SERVICE Servicing sh ould only be performe d by a Qualified Service Agent 36 24 V AC T ransformer T est 1 Ensure the main breaker or disco nnect switch is turned on. 2 V erify with an AC volt meter that proper voltag e is present at the Power Distribution Block (see Figure 2 on page 9 an d pages 12-14).
Servicing shou ld only be performed by a Qualified Service Ag ent 37 OPERATION & SERVICE IMMERSION T E MP ERATURE PROBE This section of t he manual provides information on how te st the Immersion T emperature Probe on Electronic Control Models - see Figure 2 on page 9 for location.
OPERATION & SERVICE Servicing sh ould only be performe d by a Qualified Service Agent 38 T emperature Sensor Resist ance T est 1 Secure power to the water heater at th e main breaker or disconnect switch . 2 Unplug the J5 plug from the CCB circuit board - see p age 42 for location.
Servicing shou ld only be performed by a Qualified Service Ag ent 39 OPERATION & SERVICE T emperature Sensor DC V olt age T est 1 Ensure the main breaker or disco nnect switch is turned on.
OPERATION & SERVICE Servicing sh ould only be performe d by a Qualified Service Agent 40 ECO V olt age T est 1 Ensure the main breaker or disco nnect switch is turned on. 2 V erify the CCB has the correct input voltage at the J2 socket and is prop erly grounded - perfo rm the Checking Power and Grou nd T o The CCB tests on p age 46.
Servicing shou ld only be performed by a Qualified Service Ag ent 41 ELECTRONIC CONTROLS ELECTRONIC CONTROLS This section covers the elec tronic control system used on El ectronic Control Models - see Figure 1 on page 9. The c ontrol system includes a CCB (Central Control Board) and a UIM (User Interface Module).
ELECTRONIC CONTROLS Servicing sh ould only be performe d by a Qualified Service Agent 42 CCB - CENTRAL CONTROL BOARD All wiring connections and so ckets will be identified in the following p ages. The T roubleshooting section of th is manual will refer to this illustration and information.
Servicing shou ld only be performed by a Qualified Service Ag ent 43 ELECTRONIC CONTROLS CCB Socket & Wiring T erminal Identification Refer to the illustration on pa ge 42 for physical location of the sockets and wiring terminals.
ELECTRONIC CONTROLS Servicing sh ould only be performe d by a Qualified Service Agent 44 J7 Socket - Enable / Disable Circ uits 1 & 2 (see p ages 45 & 54) J8 Socket - Not Used J9 Socket - Not .
Servicing shou ld only be performed by a Qualified Service Ag ent 45 ELECTRONIC CONTROLS CCB Enable/Disable Circuit(s) T es t The electronic control system incl udes two enable/disabl e circuits (see p age 54) for use with field installed supervisory co ntrols such as building EM S (Energy Managem ent System).
ELECTRONIC CONTROLS Servicing sh ould only be performe d by a Qualified Service Agent 46 Checking Power a nd Ground T o The CCB The CCB circuit board is powered by the120 V AC Control Circuit T ransformer (see pages 34-35) at the J2 Socket, pins 1 & 3 (see page 42).
Servicing shou ld only be performed by a Qualified Service Ag ent 47 ELECTRONIC CONTROLS UIM - USER INTERFACE MODULE UIM Component s The UIM’s major component s incl ude a Circuit Board with LC D display and a Button Pad Overlay which contains the five user input buttons.
ELECTRONIC CONTROL SYSTEM Servicing sh ould only be performe d by a Qualified Service Agent 48 ELECTRONIC CONTROL SYSTEM CONTROL SYSTEM FEATURES Advanced Diagnostics: Plain English text an d animated icons display detailed operational and diagnostic informat ion.
Servicing shou ld only be performed by a Qualified Service Ag ent 49 ELECTRONIC CONTROL SYSTEM THE DESKTOP SCREEN The illustration below shows the control system “Desktop Sc reen.
ELECTRONIC CONTROL SYSTEM Servicing sh ould only be performe d by a Qualified Service Agent 50 T able 1 St atus Icons ICON DESCRIPTION W ater temperature in the tank h as fallen. Sha ded area of the animated thermometer icon will rise and fall in response to water temperature in the stor age tank as sensed from the immersion T emperature Probe .
Servicing shou ld only be performed by a Qualified Service Ag ent 51 ELECTRONIC CONTROL SYSTEM T able 2 - Operating St ates T able 3 - Control System Menus STAT E DESCRIPTION S tandby The water he ater is not in an activ e heating cycle.
ELECTRONIC CONTROL SYSTEM Servicing sh ould only be performe d by a Qualified Service Agent 52 T EMPERATURES MENU Operating Set Point User adjustable setti ng 90°F to 190°F range; factory default is 120°F .
Servicing shou ld only be performed by a Qualified Service Ag ent 53 ELECTRONIC CONTROL SYSTEM T emperature Settings The Operating Set Point and the Differential Settings are adj usted in the T emperatures Menu. The following instructions explain how to adjust these user settings and navigate the control system menus.
ELECTRONIC CONTROL SYSTEM Servicing sh ould only be performe d by a Qualified Service Agent 54 HEATER ST ATUS MENU This menu displays non adjust able operational information. This menu contains more information that can be displayed on one screen of the LCD display .
Servicing shou ld only be performed by a Qualified Service Ag ent 55 ELECTRONIC CONTROL SYSTEM ECONOMY MODE SETUP MENU This menu contains settings used to est ablis h an “Economy Set Point” and “Economy Mode” operating periods. This control system featur e can help reduce o perating costs during unoccupied, low load, or peak demand periods.
ELECTRONIC CONTROL SYSTEM Servicing sh ould only be performe d by a Qualified Service Agent 56 Economy Mode Settings Setpoint Adjustment V alue ACTION DISPLAY From the Desktop screen, press the Op erational Button underneath “MENU” to en ter the Main Menu.
Servicing shou ld only be performed by a Qualified Service Ag ent 57 ELECTRONIC CONTROL SYSTEM Economy Mode Settings Time Clock Settings ACTION DISPLAY From the Desktop Screen navigate to the Eco nomy Mode Setup menu - see p age 56 for instructions. Use the Up/ Down buttons to se lect (highlight in black) Current T ime sub menu.
ELECTRONIC CONTROL SYSTEM Servicing sh ould only be performe d by a Qualified Service Agent 58 Economy Mode Settings Daily Operating Mode Settings ACTION DISPLAY Economy Mode All Day : From the Economy Mode Setup me nu use the Up/Down buttons to select (highlight in black) the Daily sub menu for “Sun.
Servicing shou ld only be performed by a Qualified Service Ag ent 59 ELECTRONIC CONTROL SYSTEM ALARM OUTPUT SETUP MENU Permits user to set the condition (from a list of options) for when the CCB’ s integral alarm output relay will be energized.
ELECTRONIC CONTROL SYSTEM Servicing sh ould only be performe d by a Qualified Service Agent 60 DISPLAY SETTINGS MENU Permits user to set display options for viewing information on the UIM’ s LCD screen. T emperature Unit s Adjustable user setting that changes temperature units displa y to Celsius °C or Fahrenheit °F .
Servicing shou ld only be performed by a Qualified Service Ag ent 61 ELECTRONIC CONTROL SYSTEM HEATER INFORMATION MENU This menu displays non adjust able operational information. Elap sed Time T otal accumulated time the control system (water heater) has been energized.
ELECTRONIC CONTROL SYSTEM Servicing sh ould only be performe d by a Qualified Service Agent 62 CURRENT FAULT / ALERT MENU This menu displa ys non adjustable operational information. With the Fault History sub menu selected in Main Menu; press the Operational Button underneath “SELECT” to display the current Faul t or Alert message.
Servicing shou ld only be performed by a Qualified Service Ag ent 63 RESTORE FACTORY DEFAULT S MENU This control system menu allows the user to restore most of the control system’s user settings to their factory defau lt settings.
T ROUBLESHOOTING Servicing sh ould only be performe d by a Qualified Service Agent 64 T ROUBLESHOOTING COMMON SERVICE PROBLEMS No Hot W ate r 1 Hot water supply valve turned off. 2 Check power to the water h eater - see page s 12 - 14. 3 Check thermost at/ECO controls on Surface Mo unt Control Models - see p ages 18 & 19.
Servicing shou ld only be performed by a Qualified Service Ag ent 65 T ROUBLESHOOTING ELECTRONIC CONTROL MODELS The remainder of the T roubleshooting section covers El ectronic Control Models only . Fault Conditions When the control system declare s a Fault condition it will display a Fault message on the UIM and lock out.
T ROUBLESHOOTING Servicing sh ould only be performe d by a Qualified Service Agent 66 Control System Unresponsive (cont) DISPLAYED MESSAGE CONDITION/INDICATES CHECK/RE P AIR UIM is Inoperable UIM does not respond to any user input using the operational and/or Up and Down buttons.
Servicing shou ld only be performed by a Qualified Service Ag ent 67 T ROUBLESHOOTING FAULT AND AL ERT MESSAGES T roubleshooting procedures for the most common F ault and Al ert messages are covered in this section. In the tables that follow the first colu mn shows the Fault or Alert message as displayed by the UIM along with an explanation.
T ROUBLESHOOTING Servicing sh ould only be performe d by a Qualified Service Agent 68 Fault & Alert Messages DISPLAYED MESSAGE CONDITION/INDICATES CHECK/RE P AIR “T emp Probe Open” (Fault Condition) The control system has detected an open circuit in the temperature sensor .
Servicing shou ld only be performed by a Qualified Service Ag ent 69 T ROUBLESHOOTING Fault & Alert Messages DISPLAYED MESSAGE CONDITION/INDICATES CHECK/RE P AIR “Energy Cut Out (ECO)” (Fault Condition) The control system has detect ed exce ssive water temperature inside the water heater .
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2 T echnical Support and Parts: 800-456-9805 www .americanwaterheater.com.
An important point after buying a device American Water Heater STCE3-52/80/119 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought American Water Heater STCE3-52/80/119 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data American Water Heater STCE3-52/80/119 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, American Water Heater STCE3-52/80/119 you will learn all the available features of the product, as well as information on its operation. The information that you get American Water Heater STCE3-52/80/119 will certainly help you make a decision on the purchase.
If you already are a holder of American Water Heater STCE3-52/80/119, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime American Water Heater STCE3-52/80/119.
However, one of the most important roles played by the user manual is to help in solving problems with American Water Heater STCE3-52/80/119. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device American Water Heater STCE3-52/80/119 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
