TEMPERATURES MENU

ELECTRONIC CONTROL SYSTEM

TEMPERATURES MENU

Operating Set Point

User adjustable setting 90°F to 190°F range; factory default is 120°F. When the water temperature sensed by the control system from the immersion Temperature Probe reaches the Operating Set Point the control system will end the heating cycle. A call for heat will be activated again when the water temperature drops below the Operating Set Point minus the 1st Differential Setting.

Example: Operating Set Point is 120°F, the 1st Differential Setting is 2°F (factory default). A call for heat will be activated when the sensed water temperature drops to 118°F.

Differential Settings

Adjustable user setting(s) 1°F to 20° range; factory default is 2°F. The water heaters covered in this manual will have 3, 6 or 9 heating elements. Each group of 3 heating elements is one “Bank” of heating elements. Heating elements are energized in Banks of 3. Each Bank of heating elements will have a Differential Setting associated with it. Differential Settings are located in the Temperatures Menu.

There is a 1st Differential Setting on all models. There will be one additional Differential Setting visible/adjustable for each additional Bank of (3) heating elements.

Operating Sequence: With an Operating Set Point of 120°F and all Differential settings at 2°F the On/Off sequencing of heating element Banks would be as follows:

BANK NUMBER

DIFFERENTIAL SETTING

TURN ON TEMP

TURN OFF TEMP

 

 

 

 

Bank 1

2°F

118°F

120°F

 

 

 

 

Bank 2

2°F

116°F

118°F

 

 

 

 

Bank 3

2°F

114°F

116°F

 

 

 

 

Tank Temperature

Non adjustable information display. Current water temperature as sensed by the control system from the immersion Temperature Probe.

Tank Probe Offset

User adjustable setting -5°F to +5°F range; factory default is 0°F. If the current Tank Temperature is sensed (from the immersion Temperature Probe) at 120°F and the offset is adjusted to -5°F the control system would calibrate or “offset” the Tank Temperature to 115°F. Heating cycles would then start/stop based on the calibrated Tank Temperature.

Used to calibrate for slight differences in control system temperature sensing. This can improve the precision of temperature control in the storage tank and at points of use. This feature can also be used to compensate for building recirculation loops (hot water returning to the storage tank) that may cause the heating cycle to terminate prematurely.

Servicing should only be performed by a Qualified Service Agent

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American Water Heater STCE3-52/80/119 Temperatures Menu, Operating Set Point, Differential Settings, Tank Temperature