Iii. Voltage And Voltage-Free Contact Algorithms; Circulating Pump; Buffer Pump - Tech Controllers EU-i-2 Plus OT User Manual

III. VOLTAGE AND VOLTAGE-FREE CONTACT ALGORITHMS

1.

CIRCULATING PUMP

This algorithm is intended for controlling the operation of e.g. a circulating pump. The user may select the operation mode
and adjust the pre-set temperature as well as the operation time and pause time of the contact. Once the algorithm has
been selected, the installation screen shows a graphic representation of the circuit.
Operation modes:
1. Weekly control – select the days and time periods when the circulating pump connected to the contact will be
active. During these periods the contact will operate according to the following parameters: operation time,
pause time and pre-set temperature.
2. Automatic operation – the contact operation is based on operation time and operation pause parameters.
2.

BUFFER PUMP

This algorithm is intended for controlling the operation of e.g. buffer pump according to temperature readings from two
sensors: the source sensor and the buffer sensor.
Condition for activation:
The device connected to the contact will be enabled when the temperature read by the source sensor is higher than the
temperature read by the buffer sensor by the value of activation delta. The device will be disabled if the activation
condition has been met and the buffer sensor temperature increases by the hysteresis value.
•
Activation delta – the user may define the difference between the source temperature and the buffer
temperature.
•
Activation threshold – the user may define the threshold temperature for the device activation (read by the
source sensor).
•
Hysteresis - the user may define the value at which the contact will be disabled (if the activation condition has
been met).
•
Buffer sensor – the user may select the sensor.
•
Source sensor - the user may select the sensor.
An example connection and control of the circulating pump
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