Additional Heat Source - Tech Controllers EU-i-3 Plus OT User Manual

4.

ADDITIONAL HEAT SOURCE

The algorithm is based on the readings from one temperature sensor. The device connected to the contact will be enabled
when the temperature measured by the sensor drops. It will be disabled when the temperature increases by the pre-set
overheating value.
•
Activation threshold – the user may set the temperature value below which the contact will be enabled.
•
Overheating (additional settings) - the user may set the temperature value above which the contact will be
disabled, taking into account activation threshold (Activation threshold + Overheating threshold).
•
Sensor – the user may select the heat source sensor which will provide data for contact activation/deactivation.
•
Room regulator – the user may configure the influence of the room regulators and DHW on the contact
operation. If this option has been selected, the device connected to the contact will be enabled if the activation
threshold has been reached and if any of the selected options reports too low temperature (heating need). The
device will be disabled when all selected options report that the set temperature has been reached or when the
condition (Activation threshold+Hysteresis) has been met.
Example:
Part of the CH system is heated by a fireplace and a gas boiler. The boiler is connected to the voltage-free contact and the
fireplace temperature is read by the T4 sensor (CH). The additional heat source will be activated when the sensor
temperature drops below the activation threshold. It will operate until the temperature exceeds the threshold value by
the overheating value. The device will be disabled when the room regulator informs that the set temperature has been
reached or when the temperature read by the T-4 sensor exceeds the activation threshold by the overheating value.
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