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Building Technologies Basic Documentation LMV27... CC1P7541en
10 Electronic air-fuel 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 the case of warm settings, the parameterized output remains active until the
minimum/maximum output setting is completed. Any change of the minimum/maximum
output is adopted by the parameterized output. Automatic operation becomes active
only after leaving the minimum/maximum output.
This procedure ensures that the LMV27 maintains the output set by the user, thus
facilitating troublefree setting of the minimum/maximum output.
Benefits:
The current output always corresponds to the minimum / maximum output
presently parameterized, or to the system output of the curve settings made last,
which means that the output can be ascertained accurately and free from
interference
The load sources of low priority (contacts, analog input, power output of the building
automation system, manual output) are deactivated
During the curve and the subsequent minimum/maximum output settings, the
Manual OFF function is deactivated
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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