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Building Technologies
Basic Documentation LMV5...
CC1P7550en
22 Revision history
22.05.2018
22.2.1.13 Basic unit LMV52.2, Software from V04.80 to V05.10
With the 2012/2013 release upgrade for the LMV5, the LMV52.2 now includes all the
same functions as the LMV51.0, LMV51.1, and LMV51.3 variants, refer to previous
sections for description.
Additionally, the LMV52.2 contains the following new functions:
1. Flame supervision via an external, safety-related flame safeguard, refer to chapter
External flame supervision
2. Continuous pilot
For fuel trains using a pilot, the pilot valve is activated in phases 52…62, refer to
chapter
Continuous pilot
3. A new calculation process is available for O2 precontrol.
The
Type ofAirChange
parameter was enhanced to include the
LambdaFact1
setting option, refer to chapter
Calculation of precontrol
4. When setting the electronic ratio control, the minimum intervals accepted by the
LMV52 have been reduced as follows:
Interval between O2 ratio control value and O2 setpoint:
from 1% to 0.1%
Interval between O2 setpoint and O2 minimum value:
from 0.5% to 0.1%
refer to chapter
Setting fuel-air ratio control
5. In the
operating mode
of the O2 controller
(conAutoDeac)
and when the O2
minimum value switch is triggered, the LMV5 initially moves along the ratio control
curves.
The O2 minimum value alarm remains active even once O2 trim control has been
deactivated, refer to chapter
Operating modes of O2 trim controller / O2 alarm
6. There is no waiting time following mains failures, if the QGO20 cell temperature is
higher than 690 °C at start-up, refer to chapter
Heating up the QGO20 sensor after
power On
7. O2 trim control behavior can be altered using the
O2TrimBehavior
parameter, refer
to chapter
O
2
trim control behavior
8. Limitation of the O2 controller manipulated variable via new parameters
O2MinManVariable
and
O2MaxManVariable,
refer to chapter
Limiting the O2 trim
controller manipulated variable with shutdown
9. Activation / deactivation of O2 trim control via an external contact can be configured
at input X5-03 pin 2 using parameter
Config X5-03,
refer to chapter
Deactivating O2
trim control via a contact
10. The status of the O2 controller can be displayed via data point
State O2 Ctrl,
refer
to chapter
Displaying the O2 trim controller status
11. O2 maximum value alarm revised, for function and parameters refer to chapter
O2
alarm
12. New service timer for O2 sensor available. This can be adjusted via parameter
O2SensServTim
and reset via parameter
O2SensServTimRes
, refer to chapter
Service timer for QGO20
13. In order to calculate the combustion efficiency, the supply air temperature sensor
can now be connected to input X60 of the load controller's temperature sensor, as
well as to input X87 on the PLL52, which was already available, refer to chapter
Combustion efficiency
