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Building Technologies Basic documentation LMV37.4... CC1P7546en
10 Electronic ratio control 17.12.2018
10.3.6 Setting the minimum and maximum output
When changing the setting of minimum and maximum output after making the
curve settings, following is to be observed:
After leaving the curve settings with completely defined curvepoints, proceed in
modulating operation by setting the minimum / maximum output (parameter 546).
In case of the warm setting, the parameterized output remains active until setting of
the minimum / maximum output is completed. Any change to the minimum /
maximum output is included in the parameterized output.
Automatic operation is only activated once the minimum/maximum output setting is
exited.
As a result of this procedure, the LMV37.4 maintains the output set by the user,
thus ensuring trouble-free setting of the minimum / maximum output.
Advantages:
The actual output always corresponds to the currently parameterized minimum /
maximum output or the system output resulting from the curve setting made
last, which means that the output can be ascertained accurately and without
interference
The low-priority load controller sources (contacts, analog input, output specification
of a building automation and control system, manual output) are inactive
Manual OFF function is inactive during curve setting and subsequent minimum /
maximum output setting
Unambiguous and easy-to-understand behavior of the system
Note
If there is no need to limit the output, it is not necessary to set the minimum / maximum
output. In that case, the undefined minimum / maximum output corresponds to a
minimum output of 20% and a maximum output of 100%.
No. Parameter
546 Upper output limit
undefined = 100%
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