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Building Technologies Basic documentation LMV37.4... CC1P7546en
HVAC Products 1 Safety notes 01.12.2009
1.7 Setting and parameter setting notes
• When adjusting the electronic air-fuel ratio control system integrated in the
LMV37.4..., allow for sufficient amounts of excess air since – over a period of time –
the flue gas settings are affected by a number of factors (e.g. density of air, wear of
actuators and controlling elements, etc.). For this reason, the flue gas values initially
set must be checked at regular intervals
• To safeguard against inadvertent or unauthorized parameter transfer from the PC
software to the basic unit, the OEM must assign an individual burner identifica-
tion (ID) for each burner. Compliance with this regulation is mandatory to ensure
that the LMV37.4... system prevents the transfer of parameter sets of some other
plant (with inadequate and possibly dangerous parameter values) to the LMV37.4…
system via the PC tool. In addition, the air-fuel ratio control parameters must be
manually approached and the combustion values checked
• With the LMV37.4... system, it is to be noted that the unit’s characteristics are de-
termined primarily by the specific parameter settings rather than the type of unit.
This means that, among other things, each time a plant is commissioned, the pa-
rameter settings must be checked and the LMV37.4... must not be transferred from
one plant to another without adapting the parameter settings to the new plant
• When using the ACS410 PC software, the safety notes given in the relevant Instal-
lation and Operating Instructions (J7352) must also be observed
• A password protects the parameter level against unauthorized access. The OEM al-
locates individual passwords to the setting levels he can access. The default pass-
words used by Siemens must be changed by the OEM. These passwords are confi-
dential and may only be given to persons authorized to access such setting levels
• The responsibility for setting the parameters lies with the person who – in accor-
dance with his access rights – made changes to the respective setting level
In particular, the OEM (burner and / or boiler manufacturer) assumes responsibil-
ity for the correct parameter settings in compliance with the standards covering
the specific applications (e.g. EN 676, EN 267, EN 1643, etc.).
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