Siemens LMV37.400A2 - Setting Minimum and Maximum Output

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Building Technologies Basic documentation LMV37.4... CC1P7546en
HVAC Products 9 Electronic air-fuel ratio control 01.12.2009
9.3.6 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 modu-
lating 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 system maintains the output set by the user, thus facili-
tating
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 output sources of low priority (contacts, analog input, BACS output, 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 system behavior
&
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 mini-
mum output of 20% and a maximum output of 100%.