Technische Alternative UVR 16x2 User Manual

Pasteurisation function
96
Pasteurisation function
Function description
The function monitors the temperature in cylinders to prevent the growth of Legionella bacteria.
The function starts if, during the interval time, the set temperature is not reached at the monitored
sensor for the duration of the hold time. Once the set temperature is reached, the function's output
status remains ON for the duration of the hold time. During the hold time, the sensor temperature is
kept above the set temperature. This procedure is also called disinfection.
The time interval restarts if, during the time interval, the set temperature is exceeded for the
duration of the hold time (e.g. by the action of the solar thermal system).
There is also the option of starting the function by means of an ON pulse or from the parameter
menu.
Input variables
Enable
General enabling of the function (digital value ON/OFF)
DHW temperature
Analogue input signal for the domestic hot water temperature
Set temperature
Analogue value specifying the set domestic hot water temperature for
pasteurisation
Decontamination
Digital input signal, ON/OFF, for an immediate start of the function
➢ The Decontamination input variable can come from a pushbutton, or from another function.
An ON pulse will cause the hold time to start once the set temperature + Diff off is
exceeded. The set temperature must then be maintained continuously for the duration of the
hold time. The function will not start if the sensor captures a temperature above the set
temperature at the start and the hold time has already elapsed.
Parameters
Interval time
Enter the required interval time (minimum time: 1 hour)
The function starts if, during the interval time, the set temperature is
not exceeded at the specified sensor for the duration of the hold time.
Hold time
Enter the required hold time (minimum time: 1 minute)
Generator output
Enter the required heat generator output (e.g. for a modulating burner)
when the function is active
Diff. on
Diff. off
Start differential for the set DHW temperature
Stop differential for the set DHW temperature
Start decontamination
Tapping this button starts the function under the same conditions as
when started by means of the "Decontamination" input variable.
➢ For the hold time to start during pasteurisation, the DHW temperature must exceed the set
temperature threshold + Diff. off. The DHW temperature must not fall below the set
temperature threshold + Diff. on (= hysteresis) for the duration of the hold time.

Technische Alternative UVR 16x2 Specifications

General

Brand	Technische Alternative
Model	UVR 16x2
Category	Controller
Language	English