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3.3 UPPER LED READOUT (RED)
The default display of this readout is the temperature sensed at Probe 2, which is generally the supplied outlet
water temperature. Probe 2 may display the tank stored water temperature, flue gas temperature, ambient
temperature, remote tank, blended water temperature, etc., depending on the product and application. Refer to
your specific product’s Installation and Maintenance Manual and the supplied wiring drawing. The upper LED
readout can also be switched to display Probe 1 or 3(if used) or the modulation % or the temperature difference
between Probe 1 and 2. If set to display Probe 2, and Probe 2 is not utilized, the display will show “nu”.
By pressing and releasing the button once, the Upper LED will display the actual temperature sensed at
Probe 3. Probe 3 (if used) may display the flue gas temperature or outside ambient temperature, etc.,
depending on the product and application.
By pressing and releasing the button again, the Upper LED will display the modulation %. If the product is
a non-modulating product, the displayed valve should not be considered.
By pressing and releasing the button a third time, the Upper LED will display the difference between the
temperature sensed at Probe 2 (generally the outlet temperature) and the temperature sensed at Probe 1
(generally the inlet temperature).
To return to the default in the Upper LED readout, press the button to cycle back to the Probe 2
temperature.
All of the display information described above is available for monitoring through the optional MODBUS RTU
interface.
3.4 LOWER LED READOUT (YELLOW)
The default display of this readout is the temperature sensed at Probe 1, which is generally inserted into the
return inlet piping of the boiler. Probe 1 may display the tank stored water temperature, supplied outlet water
temperature, flue gas temperature, ambient temperature, remote tank or blended water temperature, etc.,
depending on the product and application. Refer to your specific product’s Installation and Maintenance
Manual and the supplied wiring drawing. The lower LED readout can also be switched to display Probe 2 or
3(if used) or the modulation % or the Time of Day.
By pressing and releasing the button once, the Lower LED display will show the Time of Day. Press again
to return to default display.
3.5 TO SET THE CURRENT TIME AND DAY (24 HOUR CLOCK)
1. Push and hold the button for more than 3 seconds. The LED ICON starts flashing and the “Hur” (hour)
parameter name is displayed in the Upper LED readout, its value is displayed in the Lower LED readout.
2. Pushing the or button alternates the LED readouts between the following:
“Hur” (hour) in the Upper readout and its value in the lower readout.
“Min” (minute) in the Upper readout, its value in the Lower readout.
“dAY” (day) in the Upper readout, its value in the Lower readout.
3. To adjust a value, press the button and the value in the Lower LED will start flashing. Change the value by
pressing the or buttons. When correct, press .
4. To exit push + or wait 15 seconds without pressing any buttons.
NOTE: This device recognizes Sunday as the first day of the week and Saturday as the last.
