Siemens LMV5 Series Manual page 24

Function of LMV52... with O2 trim control
General
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Building Technologies Division
Industry Sector
The LMV52... system is an extended LMV51... system. A special feature of the
LMV52... is control of the residual oxygen content, aimed at increasing boiler efficiency.
In addition to the features of the LMV51..., the LMV52... provides O
trol of a maximum of 6 actuators, control of a VSD, and acquisition of cumulated fuel
consumption and current fuel throughput. The LMV52... system uses an O
(QGO20...), an external O
tem.
The PLL... O module is a detached measuring module for use with the QGO20... sen-
2
sor with a connection facility for 2 temperature sensors (Pt1000 / LG-Ni 1000). With the
help of the temperature sensors (flue gas and combustion air temperature), the com-
bustion performance can be determined, depending on the type of fuel. The module
communicates via CAN bus with the LMV52... basic unit. The O
cated near the QGO... (<10 m) to keep the impact on sensitive sensor lines as low as
possible. To power the sensor's heating element, the O
connection.
Combustion air
temperature detector
LMV52...
module, and the standard components of the LMV51... sys-
2
CAN
trim control, con-
2
sensor
2
module is to be lo-
2
module needs its own mains
2
QGO20...
Flue gas
temperature detector
O2 module
PLL...
CC1N7550en
24.05.2011