Dhw; Controlling The Room Regulator - Tech Controllers EU-i-3 Plus OT User Manual

9.

DHW

This algorithm is intended for controlling the operation of e.g. DHW pump. It is based on the readings from two sensors.
The device connected to the additional contact will be enabled if the temperature measured by the source sensor is 2°C
higher than the activation threshold and when the temperature drops below the pre-set value by the value of hysteresis.
It will be disabled when the pre-set temperature of DHW sensor has been reached and if the source sensor hasn't reached
the activation threshold.
Activation threshold – the user may set the temperature value above which the contact will be enabled.
•
Hysteresis – the user may set the temperature value below which the contact will be enabled, taking into account
•
the pre-set temperature (Pre-set temperature+Hysteresis).
Pre-set DHW temperature – the user may define the pre-set temperature.
•
Maximum temperature – the user may define the maximum temperature for the source sensor. When this value
•
is reached, the contact is enabled and it will remain active until the source temperature drops by 2 °C below the
maximum temperature or the DHW sensor temperature exceeds the source temperature. This function protects
the system against overheating.
Source sensor – the user may select the sensor which will provide temperature readings for controlling the
•
contact.
DHW sensor - the user may select the sensor which will provide temperature readings for controlling the contact
•
(pre-set temperature).
10.

CONTROLLING THE ROOM REGULATOR

This algorithm is based on the signal from the room regulator. The device connected to the contact will be enabled when
the regulator fails to reach the pre-set temperature (the regulator contact is closed). It will be disabled when the regulator
reaches the pre-set temperature value (the regulator contact is open).
The device operation may also depend on the signal from more than one room regulator - it will be disabled only after all
room regulators report that the pre-set room temperature has been reached. If DHW option is selected, the device
connected to the additional contact will be enabled and disabled depending on the pre-set DHW temperature - when the
pre-set temperature value has been reached, the device will be disabled.
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