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6
KH 5757 EN
Functions and parameters
Operation with a DHW sensor
A Pt 1000 temperature sensor (e.g. Type 5207-0060, ideally combined with a sensor pocket
to provide the best positioning of the sensor at the heat exchanger) measures the DHW tem-
perature at the heat exchanger. The measured temperature is compared with the set point
and the valve is moved accordingly to achieve this temperature (see above).
Operation with a current input
As an alternative to a flow sensor, the input of the current flow temperature can be also be
implemented by the current input (0 to 20 mA or 4 to 20 mA). The input signal is based on
the measuring range (Xmin to Xmax). The measured DHW temperature is compared with the
set point and the valve is moved accordingly to achieve this temperature (see above).
The function to maintain the water temperature at a constant temperature (see section 2.3)
cannot be used when the current input is active.
Functions
WE
Configuration
F05: Current input
0
F05 - 1
F06: Function of current input
0
F06 - 0
F07: Measuring range of current input
0
F07 - 0: 0 to 20 mA
F07 - 1: 4 to 20 mA
Parameters
WE
Value range
P03: Lower measuring range value Xmin
0 °C
–50 to 90 °C
P04: Upper measuring range value Xmax
100 °C
10 to 150 °C
2.1.1
DHW tapping recognition with a flow switch
The flow switch is used to indicate when DHW tapping is starts and finishes. A closed contact
causes the pump to start running (the DHW temperature control at the DHW sensor is active).
An open contact causes the valve to close and the pump to be switched off.
Functions
WE
Configuration
F01: DHW tapping recognition
1
F01 - 1
F02: Flow rate sensor
1
F02 - 0
NOTICE
!
Содержание TROVIS 5757-3
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