Herz pelletfire 20/20, Operating Instructions Manual

Page: 57 / 100

Menu navigation and adjustment values 9
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9.13.10 External requirement
The external requirement module provides an interface to an external foreign control loop (e.g. central
building control system). The requirement, which can be digital or analogue, is registered as a required
temperature (e.g. boiler must temperature by the boiler or buffer top temperature by the buffer) in the heat
supplier (e.g. boiler or buffer).
Navigation:
→ →
External requirement
Screen:
By pressing the button:
the „external requirement status“ menu will be displayed
the menu for the "settings" will be displayed
the menu for the "requirement curve" will be displayed
the „barrier times“ menu will be displayed
External requirement
Indicates a digital input signal of the external control loop (requirement):
If the indicator lamp lights up, the external control loop sends a requirement to
the digital input.
Term Description Unit
Menu "Status"
Status 1 1
Demand active Indicates the state of the external demand -
Menu "Settings"
Settings 1
External must
temperature
Setting up the (digital) external set temperature (50-100):
The boiler will operate with the external set temperature (fixed) as long as
the analogue set temperature does not exceed the set up temperature
°C
menu "Requirement curve"
requirement curve 1