Siemens LMV52.200A2 - Page 12

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Siemens Building Technologies Basisdokumentation LMV5... CC1P7550en
HVAC Products 13.08.2004
18.2 Differences to LMV51.200... and LMV51.000... / LMV51.100......................260
− Special functions Curve settings for electronic ratio control................260
18.3 EMC: LMV5... system – VSD.......................................................................261
18.4 Connection terminals ...................................................................................262
18.5 Description of the connection terminals for the variable speed drive
module 263
19 Addendum 4: LMV52... with O2 trim control and O2 module ................264
19.1 General ........................................................................................................264
19.2 Functioning principle of O2 trim control .......................................................265
19.2.1 Air rate reduction..........................................................................................265
19.2.2 Definition of O2 setpoint...............................................................................265
19.2.3 Lambda factor..............................................................................................266
19.3 Precontrol.....................................................................................................267
19.3.1 Calculation of precontrol ..............................................................................267
19.4 O2 trim control .............................................................................................268
19.4.1 Operating modes of O2 trim controller / O2 monitor ....................................268
19.4.2 Load limitation with O2 trim control..............................................................269
19.4.3 Startup .........................................................................................................269
19.4.4 Heating up the O2 sensor after «PowerOn»................................................269
19.4.5 Initialization of O2 trim controller..................................................................269
19.4.6 Behavior in the event of load changes.........................................................270
19.4.7 Increasing the manipulated variable in the case of a load change (offset)..271
19.4.8 Control interventions by the O2 trim controller.............................................272
19.5 O2 monitor ...................................................................................................273
19.5.1 Delayed O2 min. value.................................................................................273
19.5.2 Switch-off criteria .........................................................................................273
19.6 Self-test........................................................................................................274
19.6.1 Sensor test...................................................................................................274
19.6.2 Checking the O2 content (20.9 %)...............................................................275
19.7 Auxiliary functions........................................................................................276
19.7.1 Warning when flue gas temperature is too high...........................................276
19.7.2 Combustion efficiency..................................................................................276
19.8 O2 module ...................................................................................................277
19.8.1 Inputs and outputs .......................................................................................277
19.8.2 CAN bus X84, X85.......................................................................................280
19.9 Configuration of O2 module .........................................................................280
19.10 Configuration of the system .........................................................................281
19.10.1 Actuators / VSDs..........................................................................................281
19.10.2 Parameterization of the type of fuel .............................................................281
19.10.3 Setting the user-defined type of fuel ............................................................282
− Preset fuel parameters ....................................................................282
19.11 Commissioning the O2 trim control system .................................................283
19.11.1 Setting ratio control......................................................................................283
19.11.2 Setting the O2 monitor .................................................................................283
19.11.3 Direct entry of O2 min. values......................................................................284
19.11.4 Measuring the O2 min. values by lowering the air rate................................284