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34-55 08/14
9
TEMPTRAC™ ELECTRONIC CONTROLLER PANEL
9.1 Principle Of Operation
The boiler operates to satisfy the setpoint of the TempTrac digital control whose sensor is located in the return line of
a Hydronic system. Demand (flow) will typically create a drop in temperature, thus activating the Centauri to add heat
to the system. This setpoint is the highest temperature the appliance permits any firing to occur.
9.2 Upper Led Readout
The default display of this readout is the supply temperature sensed in the thermal well at the top of the boiler tank
(Probe 2).
9.3 Lower Led Readout
The default display of this readout is the return water temperature sensed in the thermo well installed in the return
water piping (Probe 1). This is used to regulate the temperature of the boiler.
9.4 Control
Buttons
SET
Displays and modifies the temperature set points.
In programming mode, it selects a parameter or confirms an operation.
UP
Displays and modifies the energy saving (Night Time setback) settings.
In programming mode, it browses the parameter codes or increases a displayed value.
DOWN
Displays the working hours of the load relays.
In programming mode, it browses the parameter codes or decreases a displayed value.
CLOCK
Changes lower display from inlet temperature to current time and day.
EXT
Changes upper display from supply temperature to outdoor reset temperature probe (when
installed). Also displays the temperature difference of the return temperature minus supply
temperature. In programming mode it sets the 4-20mA output (password is required).
ON/OFF
Switches the control ON or OFF.
(See TempTrac User Manual 34-80 for full description)
