American Water Heater HeavyDuty Surface Thermostat Commercial Electric STCE3150 80 119 User Manual

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by  the  manufacturer.  The  valve  is  certified  by  a  nationally 
recognized testing laboratory that maintains periodic inspection 
of  production  of  listed  equipment  of  materials  as  meeting  the 
requirements for Relief Valves for Hot Water Supply Systems, 
ANSI Z21.22 • CSA 4.4, and the code requirements of ASME.
If replaced, the new valve must meet the requirements of local 
c o d e s ,  b u t  n o t  l e s s  t h a n  a  c o m b i n a t i o n  t e m p e r a t u r e  a n d  p r e s s u r...

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ELECTRICAL
GENERAL
The  installation  must  conform  with  these  instructions  and  the  local  code  authority  having  jurisdiction  and  the  requirements  of  the  power 
company. In the absence of local codes, the installation must comply with the current editions of the National Electrical Code, NFPA 70 or 
the Canadian Electrical Code CSA C22.1. 
An  electrical  ground  is  required  to  reduce  risk  of  electrical  shock  or  possible  electrocution.  The  water  heater  should  be...

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AMPERAGE TABLE/OVERCURRENT PROTECTION
The tables above provides the total connected heating element load 
in amperes for branch circuit conductor and overcurrent protection 
sizing.  Single-phase  heaters  are  two  wire  circuits.  Three-phase 
heaters  are  three  wire  circuits.  In  addition  to  the  foregoing,  a 
grounded conductor is required.
The rating of the overcurrent protection must be computed on the basis 
of 125% of the total connected load amperage. Where the standard 
ratings and...

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CCB (CENTRAL CONTROL BOARD)
CONTROL CIRCUIT DIAGRAM - ELECTRONIC CONTROL MODELS
Figure 6
WIRING DIAGRAMS 

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DIAGRAM 1.
WIRING DIAGRAMS
POWER CIRCUIT DIAGRAMS - ELECTRONIC CONTROL MODELS
The water heater’s electrical components are pictured and identified on page 7. The following describes the heater circuits and includes wiring 
diagrams. All heater circuits are designed for 60/50 hertz alternating current. The water heater circuit wiring is 12 AWG, AWM, or TEW type, 
rated 600 volts, 105°C. Fusing consists of three 30 amp fuses for each contactor. Fusing is an optional feature for Canadian models.
THREE...

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WIRING DIAGRAMS
NINE ELEMENT - SINGLE AND THREE PHASE
CONVERSION TO SINGLE PHASE
When the heater is shipped for connection to a three-phase electrical 
service, it may be connected to a single-phase electrical service of 
the same voltage by:
1. Disconnect blue wires and yellow wires from terminal L3.
2. Reconnect all blue wires to terminal L1 (with black wires).
3. Reconnect all yellow wires to terminal L2 (with red wires).
4. Connect incoming power to terminals L1 and L2.
CONVERSION TO THREE PHASE...

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WIRING DIAGRAMS
POWER CIRCUIT DIAGRAMS - SURFACE MOUNT CONTROL MODELS
The water heater’s electrical components are pictured and identified on page 8. The following describes the heater circuits and includes 
wiring  diagrams. All  heater  circuits  are  designed  for  60/50  hertz  alternating  current.  The  water  heater  circuit  wiring  is  12 AWG, AWM,  or 
TEW type, rated 600 volts, 105°C. Fusing consists of two 30 amp fuses for each element. Fusing is an optional feature for Canadian...

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WIRING DIAGRAMS
CONVERSION TO SINGLE PHASE
When the heater is shipped for connection to a three-phase electrical 
service, it may be connected to a single-phase electrical service of 
the same voltage by:
1. Disconnect blue wires from terminal L2.
2. Connect all blue wires to terminal L1 (with black wires).
3. Disconnect all red wires from terminal L3.
4. Connect all red wires to terminal L2 (with yellow wires).
5. Connect incoming power to terminals L1 and L2.
CONVERSION TO THREE PHASE
When heater is...

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OPERATION
GENERAL
Refer  to  the  Features  and  Components  section  of  this  manual 
(pages  7  &  8)  for  the  location  of  components  mentioned  in  the 
instructions that follow.
NEVER turn on power to the water heater without being certain the 
water heater is filled with water and a temperature and pressure 
relief valve is installed in the relief valve opening.
DO NOT TEST ELECTRICAL SYSTEM BEFORE HEATER IS 
FILLED WITH WATER. FOLLOW FILLING AND START-UP 
INSTRUCTIONS IN OPERATION...

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HIGH TEMPERATURE LIMIT CONTROLS (ECO)
Both  the  ELECTRONIC  CONTROL  and  SURFACE  MOUNT 
CONTROL model water heaters are equipped with one or more ECO 
(energy cut off) non adjustable high temperature limit control(s). An 
ECO  is  a  normally  closed  switch  that  opens  (activates)  on  a  rise 
in  temperature.  If  the  ECO  switch  contacts  open  (activate)  due  to 
abnormally high water temperatures it will lock-out and disable further 
heating  element  operation.  It  is  important  that...