Safety Notes; Warning Notes - Siemens LMV37.4 Series Basic Documentation

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Building Technologies Division
Industry Sector
1

Safety notes

1.1

Warning notes

To avoid injury to persons, damage to property or the environment, the following
warning notes must be observed!
LMV37.4... are safety devices! Do not open, interfere with or modify the units.
Siemens does not assume responsibility for damage resulting from unauthorized
interference!
The chapters covering the LMV37.4... contain additional warning notes which
should also be observed when using the different unit versions!
After commissioning and after each service visit, check the flue gas values
across the entire output range!
The present Basic Documentation describes a wide choice of applications and functions
and shall serve as a guideline. The correct functioning of the units is to be checked and
proven by function checks on a test rig or on the plant itself!

All activities (mounting, installation and service work, etc.) must be performed by
qualified personnel

Degree of protection IP40 as per DIN EN 60529 for the basic unit must be ensured
through adequate mounting of the LMV37.4... by the burner or boiler manufacturer

Before making any wiring changes in the connection area, completely isolate the
plant from mains supply (all-polar disconnection). Ensure that the plant cannot be
inadvertently switched on again and that it is indeed dead. If not disconnected, there
is a risk of electric shock hazard

Protection against electric shock hazard on the LMV37.4... and on all connected
electrical components must be ensured through adequate mounting. In terms of
design, stability and protection, the cover used must conform to EN 60730

After each activity (mounting, installation and service work, etc.), check to ensure
that wiring is in an orderly state and that the parameters are correctly set

Fall or shock can adversely affect the safety functions. Such units must not be put
into operation even if they do not exhibit any damage

When programming the air-fuel ratio control curves, the commissioning engineer
must constantly watch the quality of the combustion process (e.g. by means of a
flue gas analyzer) and, in the event of poor combustion values or dangerous
conditions, take appropriate actions, e.g. by shutting down the system manually

The following plug-on terminations carry FELV (Functional Extra Low-Voltage) (also
refer to chapter Electrical connection of the LMV37.4...) which means that they do not
provide safe separation from mains voltage:
- The BCI (X56) for the connecting cable of the AZL2... or PC software ACS410
- COM (X92) for accessories, such as the OCI410...
These plug-on terminations may be removed or replaced only when the plant is dead
(all-polar disconnection)

The connectors of the connecting cables for the LMV37.4... or other accessories,
such as the OCI410... (plugged into the BCI), may only be removed or exchanged
when the plant is shut down (all-polar disconnection), since the BCI interface does
not provide safe separation from mains voltage

The connections for the SQM3... or SQN1... actuators do not provide safe
separation from mains voltage. Prior to connecting or changing one of these
actuators, the plant must be shut down (all-polar disconnection)
Basic documentation LMV37.4...
1 Safety notes
CC1P7546en
20.09.2013