Manual Mode; Status During Alarm; Part Vi. Cascade; Select Operation Algorithm - Tech Controllers EU-i-3 Plus OT User Manual

2.2.

MANUAL MODE

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Manual mode – this algorithm is based on the readings from one selected temperature sensor. The contact will
provide the set voltage (VOLTAGE) if the temperature measured by the selected sensor drops below the pre-
set value by the value of hysteresis of the selected circuits, with a valve or DHW or additional contact (after
selecting the algorithm: CH pump, additional heat source, buffer, DHW buffer).
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Voltage – the user may set the contact voltage.
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Sensor – the user may select the sensor on which the algorithm will be based.
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Pre-set temperature –the pre-set temperature value for the algorithm. The contact voltage will be maintained
until the selected sensor reaches the pre-set temperature.
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Hysteresis - the difference between the temperature of the heat source and the pre-set temperature.
3.

STATUS DURING ALARM

This function enables the user to set the contact voltage during alarm.
I. CASCADE
This algorithm is used to control the devices e.g. CH boilers using additional contacts. Depending on the mode selected,
the boilers will be switched on one by one.
1.

SELECT OPERATION ALGORITHM

Schedule - In schedule mode, the contacts are enabled according to the pre-set order, which a qualified fitter
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may define in Schedule modification function. All contacts are activated after the pre-set pause time, when the
need for activating a contact is reported. If the need to disable the contact is reported, the contact is deactivated
after the pre-set operation time. If a change (enable/disable) is introduced during one of the two timers'
operation, the countdown starts anew from the moment of introducing the change.
Part VI
Cascade
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