Siemens LMS14 User manual

Release 6
CC1U7471en
28.01.2015
Building Technologies Division
Albatros²
Boiler management unit LMS14...
User Manual
The LMS14… and this User Manual are intended for use by OEMs which integrate the boiler management unit
in their products.

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Contents
1Summary ....................................................................................................... 13
1.1 Supplementary documentation...................................................................... 13
1.2 Target group of users ....................................................................................14
1.3 Product range summary ................................................................................ 15
1.3.1 Topology........................................................................................................ 15
1.3.2 Operating options .......................................................................................... 16
2Safety notes................................................................................................... 17
2.1 Notes on product liability ...............................................................................17
2.1.1 Use of high-efficiency pumps ........................................................................18
2.1.2 High-voltage test............................................................................................ 18
2.2 Environmental compatibility........................................................................... 19
2.3 Lifecycle......................................................................................................... 19
2.4 Standards and certificates ............................................................................. 19
2.5 Typographical conventions............................................................................ 20
2.5.1 Safety notes................................................................................................... 20
3Mounting and installation............................................................................... 21
3.1 Safety regulations.......................................................................................... 21
3.1.1 Electrical connection of ionization probe ....................................................... 21
3.1.2 Electrical connection on 2-phase systems ....................................................22
3.2 Boiler management unit LMS14…................................................................. 23
3.3 Basic diagram LMS14…................................................................................ 25
3.4 Basic unit LMS14… complete (Basic) ........................................................... 26
3.4.1 Terminals of LMS14… complete (Basic) ....................................................... 27
3.4.2 Assignment of terminal X30........................................................................... 28
3.4.3 List of terminals of LMS14… complete (Basic).............................................. 29
3.5 Basic unit LMS14... complete (Medium) ........................................................ 30
3.5.1 Terminals of LMS14… complete (Medium) ................................................... 31
3.5.2 Assignment of terminal X30........................................................................... 32
3.5.3 List of terminals of LMS14… complete (Medium).......................................... 33
3.6 Basic unit LMS14... complete (Deluxe) ......................................................... 34
3.6.1 Terminals of LMS14… complete (Deluxe)..................................................... 35
3.6.2 Assignment of terminal X30........................................................................... 36
3.6.3 List of terminals of LMS14… complete (Deluxe) ........................................... 37
3.7 Cable AGU2.110x109.................................................................................... 38
3.8 Parameter stick AGU2.56xx109 .................................................................... 39
4Commissioning .............................................................................................. 40
4.1 Basic units ..................................................................................................... 40

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5Handling.........................................................................................................41
5.1 Operation and display ....................................................................................41
5.2 Overview of settings.......................................................................................42
6The settings in detail ....................................................................................124
6.1 Time of day and date ...................................................................................124
6.1.1 Summer-/wintertime changeover .................................................................124
6.2 RF link..........................................................................................................125
6.2.1 Binding .........................................................................................................125
6.2.2 List of wireless devices ................................................................................126
6.3 Time programs.............................................................................................128
6.3.1 Switching points ...........................................................................................128
6.3.2 Standard program ........................................................................................128
6.4 Holidays .......................................................................................................129
6.5 Heating circuits ............................................................................................131
6.5.1 Operating mode ...........................................................................................131
6.5.2 Compensation variants ................................................................................132
6.5.3 Occupancy button (presence button)...........................................................134
6.5.4 Operating level.............................................................................................134
6.5.5 Setpoints ......................................................................................................135
6.5.6 Heating curve...............................................................................................136
6.5.7 ECO function................................................................................................139
6.5.8 Flow temperature setpoint limits ..................................................................142
6.5.9 Room thermostat .........................................................................................143
6.5.10 Delay heat request.......................................................................................147
6.5.11 Room model.................................................................................................149
6.5.12 Room influence ............................................................................................150
6.5.13 Room temperature control and limitation .....................................................152
6.5.14 Heating limit room controller ........................................................................152
6.5.15 Boost heating ...............................................................................................153
6.5.16 Quick setback ..............................................................................................154
6.5.17 Optimum start/stop control...........................................................................156
6.5.18 Heating up gradient room model..................................................................157
6.5.19 Raising the Reduced setpoint ......................................................................157
6.5.20 Continuous pump operation.........................................................................159
6.5.21 Frost protection for the room........................................................................160
6.5.22 Frost protection for the heating circuit in Heating mode ..............................160
6.5.23 Overtemperature protection for the pump heating circuit.............................161
6.5.24 Locking signals ............................................................................................162
6.5.25 Forced signals..............................................................................................162
6.5.26 Overtemperature protection for the mixing heating circuit ...........................162
6.5.27 Pulse lock.....................................................................................................163

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6.5.28 Flow temperature alarm............................................................................... 163
6.5.29 Locking signals ............................................................................................ 164
6.5.30 Forced signals ............................................................................................. 164
6.5.31 Mixing valve control ..................................................................................... 165
6.5.32 Floor curing function .................................................................................... 167
6.5.33 Forced signal and locking signal ................................................................. 170
6.5.34 Buffer storage tank/primary controller ......................................................... 170
6.5.35 Speed-controlled pump ............................................................................... 171
6.5.36 Operating level changeover via input H....................................................... 174
6.5.37 Operating mode changeover via input H ..................................................... 174
6.5.38 Behavior in the case of burner cycling......................................................... 175
6.5.39 2-speed heating circuit pump ...................................................................... 175
6.5.40 2-speed boiler pump....................................................................................176
6.6 Cooling circuit 1 ........................................................................................... 177
6.6.1 Operating mode........................................................................................... 177
6.6.2 Setpoints...................................................................................................... 177
6.6.3 Room temperature limitation ....................................................................... 178
6.7 DHW heating ............................................................................................... 179
6.7.1 DHW mode .................................................................................................. 180
6.7.2 Setpoints...................................................................................................... 181
6.7.3 Holiday program .......................................................................................... 182
6.7.4 DHW release ............................................................................................... 183
6.7.5 Priority ......................................................................................................... 185
6.7.6 Locking signals ............................................................................................ 185
6.7.7 Forced signals ............................................................................................. 185
6.7.8 Pump overrun .............................................................................................. 186
6.7.9 Legionella function....................................................................................... 186
6.7.10 Circulating pump.......................................................................................... 190
6.7.11 Frost protection for the circulation pipe ....................................................... 191
6.7.12 Operating mode changeover via input H ..................................................... 192
6.8 Consumer circuit and swimming pool circuit ...............................................193
6.9 Swimming pool ............................................................................................ 194
6.9.1 Setpoints...................................................................................................... 194
6.9.2 Priority ......................................................................................................... 194
6.9.3 Overtemperature protection......................................................................... 195
6.9.4 Plant hydraulics ........................................................................................... 195
6.10 Primary controller/system pump .................................................................. 196
6.10.1 Limitations of the flow temperature setpoint ................................................ 196
6.10.2 Mixing valve control ..................................................................................... 197
6.10.3 Plant hydraulics ........................................................................................... 198
6.11 Boiler ........................................................................................................... 199
6.11.1 Release threshold Outside temperature...................................................... 199

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6.11.2 Full charging of buffer storage tank .............................................................199
6.11.3 Setpoints ......................................................................................................200
6.11.4 Setpoint manual control ...............................................................................202
6.11.5 Frost protection for the boiler .......................................................................203
6.11.6 PID control algorithm ...................................................................................204
6.11.7 Boiler/burner control.....................................................................................205
6.11.8 Overtemperature protection .........................................................................206
6.11.9 Minimum limitation of boiler temperature .....................................................207
6.11.10 Minimum limitation of return temperature ....................................................209
6.11.11 Boiler pump..................................................................................................210
6.11.12 Electronic temperature controller .................................................................211
6.11.13 Limitation of boiler temperature increase.....................................................212
6.11.14 Speed control...............................................................................................214
6.11.15 Output data ..................................................................................................220
6.11.16 Fan...............................................................................................................221
6.11.17 Controller delay............................................................................................223
6.11.18 Dynamic switching differentials....................................................................225
6.11.19 Delay heat request special operation...........................................................229
6.11.20 Flue gas supervision ....................................................................................230
6.11.21 Static pressure supervision..........................................................................234
6.11.22 Dynamic pressure supervision.....................................................................237
6.11.23 Water pressure sensor.................................................................................241
6.11.24 Filling/flow supervision .................................................................................243
6.11.25 Quick shutdown of burner ............................................................................245
6.11.26 Limitation of output.......................................................................................246
6.11.27 Electronic limit thermostat............................................................................248
6.11.28 Electronic safety limit thermostat (SLT) .......................................................249
6.11.29 Energy meter ...............................................................................................255
6.11.30 Deaeration function......................................................................................256
6.11.31 Input configuration dynamic pressure supervision.......................................258
6.11.32 Input configuration flow supervision.............................................................258
6.11.33 Additional settings for static pressure supervision .......................................259
6.11.34 Additional settings for dynamic pressure supervision ..................................259
6.12 Special boiler functions ................................................................................260
6.12.1 Change of operating mode ..........................................................................260
6.12.2 Loading the setpoint/actual value ................................................................260
6.12.3 Automatic heat generation lock....................................................................261
6.12.4 Manual heat generation lock........................................................................261
6.12.5 Generation of common flow temperature setpoint .......................................262
6.12.6 Generation of boiler temperature setpoint ...................................................262
6.12.7 Boiler control ................................................................................................263
6.12.8 Heat output limits .........................................................................................264

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6.12.9 2-position controller ..................................................................................... 264
6.12.10 Protective boiler startup............................................................................... 265
6.12.11 Keeping the boiler hot.................................................................................. 267
6.12.12 Alternative setting of output ......................................................................... 267
6.13 Cascaded systems ...................................................................................... 268
6.13.1 Addressing devices ..................................................................................... 268
6.13.2 Cascade master .......................................................................................... 269
6.13.3 Operating mode........................................................................................... 270
6.13.4 Control ......................................................................................................... 271
6.13.5 Boiler sequence........................................................................................... 272
6.13.6 Minimum limitation of return temperature .................................................... 274
6.13.7 Supervision of temperature differential........................................................ 275
6.14 Extra heat source ........................................................................................275
6.15 Solar ............................................................................................................ 276
6.15.1 General........................................................................................................ 276
6.15.2 Sensors ....................................................................................................... 277
6.15.3 Charging controller (dT)............................................................................... 279
6.15.4 Maximum charging temperature, maximum safety temperature .................281
6.15.5 Priority ......................................................................................................... 282
6.15.6 Collector start function................................................................................. 284
6.15.7 Frost protection for the collector .................................................................. 286
6.15.8 Overtemperature protection for the collector ............................................... 287
6.15.9 Recooling..................................................................................................... 289
6.15.10 Evaporation temperature of medium ........................................................... 291
6.15.11 Speed control .............................................................................................. 292
6.15.12 Yield measurement...................................................................................... 293
6.15.13 Hours run..................................................................................................... 293
6.16 Solid fuel boiler ............................................................................................ 294
6.16.1 General........................................................................................................ 294
6.16.2 Operating mode........................................................................................... 295
6.16.3 Setpoints...................................................................................................... 297
6.16.4 Control of the boiler/burner..........................................................................298
6.16.5 Overtemperature protection......................................................................... 302
6.16.6 Frost protection............................................................................................ 303
6.16.7 Frost protection for the solid fuel boiler ....................................................... 304
6.16.8 Configuration errors..................................................................................... 304
6.16.9 Sensor error................................................................................................. 304
6.17 Buffer storage tank ...................................................................................... 305
6.17.1 Release/control of heat source.................................................................... 305
6.17.2 Automatic locks ........................................................................................... 305
6.17.3 Charging solar/solid fuel boiler .................................................................... 307
6.17.4 Recooling..................................................................................................... 308

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6.17.5 Plant hydraulics............................................................................................308
6.17.6 Return diversion...........................................................................................309
6.17.7 Partial charging ............................................................................................310
6.17.8 Full charging ................................................................................................311
6.17.9 Frost protection for the buffer in Heating mode ...........................................311
6.17.10 Heat transfer to the DHW storage tank........................................................312
6.18 DHW storage tank........................................................................................314
6.18.1 Types of heat request ..................................................................................314
6.18.2 DHW charging with one sensor ...................................................................314
6.18.3 DHW charging with 2 sensors......................................................................315
6.18.4 DHW charging with thermostat ....................................................................315
6.18.5 Release........................................................................................................316
6.18.6 Charging control...........................................................................................318
6.18.7 Limitation of charging time ...........................................................................319
6.18.8 Charging pump/diverting valve ....................................................................319
6.18.9 Discharging protection .................................................................................320
6.18.10 Overtemperature protection .........................................................................321
6.18.11 Frost protection for the DHW storage tank ..................................................321
6.18.12 Recooling .....................................................................................................322
6.18.13 Electric immersion heater ............................................................................323
6.18.14 DHW push....................................................................................................326
6.18.15 Excess heat draw.........................................................................................328
6.18.16 Plant hydraulics............................................................................................328
6.18.17 Speed-controlled pump................................................................................329
6.18.18 Heat transfer ................................................................................................331
6.18.19 Stratification storage tank/intermediate circuit .............................................332
6.19 Storage tank systems ..................................................................................334
6.19.1 Control of storage tank with sensor .............................................................334
6.20 Stratification storage tank ............................................................................336
6.20.1 Stratification storage tank with control to the boiler temperature flow..........338
6.20.1.1. Full charging of stratification storage tank ...................................................340
6.20.1.2. Recharging the stratification storage tank....................................................341
6.20.2 Stratification storage tank with control to the DHW charging temperature via
setpoint compensation .................................................................................................342
6.20.2.1. Full charging of stratification storage tank ...................................................344
6.20.2.2. Recharging the stratification storage tank....................................................347
6.20.3 Stratification storage tank with direct control to the DHW charging
temperature..................................................................................................................348
6.20.3.1. Full charging of stratification storage tank ...................................................349
6.20.3.2. Recharging the stratification storage tank....................................................351
6.21 Instantaneous water heater .........................................................................352
6.21.1 Control .........................................................................................................352
6.21.2 DHW consumption (flow) .............................................................................352

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6.21.3 DHW consumption (gradient) ...................................................................... 353
6.21.4 Keep hot function......................................................................................... 354
6.21.5 Times........................................................................................................... 355
6.21.6 Overrun........................................................................................................ 355
6.21.7 Speed-controlled pump ............................................................................... 356
6.21.8 Configuration ............................................................................................... 357
6.21.9 Setpoint readjustment.................................................................................. 370
6.23 Configuration ............................................................................................... 378
6.23.1 Manual setting/adaption of partial diagrams................................................ 381
6.23.2 Heating circuits/cooling circuit ..................................................................... 381
6.23.3 DHW storage tank ....................................................................................... 382
6.23.4 DHW separate circuit................................................................................... 385
6.23.5 Boiler ........................................................................................................... 388
6.23.6 Boiler pump ................................................................................................. 390
6.23.7 Solar ............................................................................................................ 395
6.23.8 Combi storage tanks.................................................................................... 396
6.23.9 Relay outputs QX ........................................................................................ 397
6.23.10 Sensor inputs BX......................................................................................... 403
6.23.11 Inputs H1/H3/H4/H5/H6/H7 ......................................................................... 405
6.23.12 Extension modules ...................................................................................... 414
6.23.13 EX extension modules 1/2/3........................................................................ 416
6.23.14 QX extension modules 1/2/3 .......................................................................418
6.23.15 BX extension modules................................................................................. 423
6.23.16 H2 extension modules 1/2/3 ........................................................................ 425
6.23.17 PWM output/10 V output UX2/UX3 .............................................................433
6.23.18 PWM output P1 ........................................................................................... 435
6.23.19 Types of sensors/readjustments.................................................................. 436
6.23.20 Building model ............................................................................................. 437
6.23.21 Setpoint compensation ................................................................................ 439
6.23.22 Frost protection for the plant........................................................................ 440
6.23.23 Control of flue gas damper .......................................................................... 441
6.23.24 Pump/valve kick........................................................................................... 441
6.23.25 Pressure measurements H1, H2 and H3..................................................... 442
6.23.26 Saving the sensors ...................................................................................... 444
6.23.27 Plant diagrams............................................................................................. 463
6.23.28 Device data.................................................................................................. 467
6.23.29 External space heating ................................................................................ 468
6.23.30 Partial diagrams........................................................................................... 469
6.24 LPB system ................................................................................................. 470
6.24.1 Address/power supply ................................................................................. 470
6.24.2 Errors/maintenance/alarm ........................................................................... 472
6.24.3 Central functions.......................................................................................... 473

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6.24.4 Clock ............................................................................................................478
6.24.5 Outside temperature ....................................................................................478
6.25 Faults ...........................................................................................................479
6.25.1 Message ......................................................................................................479
6.25.2 Acknowledgements......................................................................................479
6.25.3 Error message functions ..............................................................................480
6.25.4 History..........................................................................................................483
6.26 Maintenance/special mode ..........................................................................484
6.26.1 Maintenance functions .................................................................................484
6.27 Special operating modes .............................................................................485
6.28 Parameter stick AGU2.56... .........................................................................493
6.28.1 Wrong use and risks ....................................................................................493
6.28.2 Checks made by the LMS14........................................................................493
6.28.3 Examples of potential risks ..........................................................................494
6.28.4 Reducing potential risks...............................................................................494
6.28.5 Spare part business .....................................................................................495
6.28.6 General notes on risks and problems ..........................................................496
6.28.7 Operation via the boiler................................................................................497
6.28.8 Parameter setting state................................................................................501
6.28.9 Conditions for the transfer of data between LMS14... and parameter stick .502
6.29 Input/output test ...........................................................................................504
6.29.1 Output test relay...........................................................................................505
6.29.2 Input test sensors.........................................................................................508
6.29.3 Input test H1/H2/H3/H4/H5/H6/H7 ...............................................................509
6.29.4 Input test EX (extension modules) ...............................................................509
6.30 Operating state ............................................................................................510
6.30.1 Messages.....................................................................................................510
6.31 Diagnostics of cascaded system..................................................................515
6.32 Diagnostics of heat sources.........................................................................516
6.32.1 Process values.............................................................................................516
6.33 Diagnostics of consumers............................................................................517
6.34 Burner control ..............................................................................................518
6.34.1 Prepurging ...................................................................................................518
6.34.2 Ignition .........................................................................................................519
6.34.3 Operation .....................................................................................................520
6.34.4 Postpurging..................................................................................................521
6.34.5 Configuration................................................................................................522
6.34.6 Fan control ...................................................................................................525
6.34.7 Chimney drying ............................................................................................526
6.34.8 Setpoint filter for fan speed control ..............................................................527
6.34.9 Configuration................................................................................................531
6.35 Program sequence of burner control (function) ...........................................535

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6.35.1 Program selection........................................................................................ 535
6.35.2 Forced intermittent operation....................................................................... 535
6.35.3 Burner control program................................................................................ 535
6.35.4 Burner capacities......................................................................................... 536
6.35.5 Sequence diagram for burner capacities ≤120 kW and Release QAA fan
param [4337.1] = ON ................................................................................................... 537
6.35.6 Sequence diagram for burner capacities >120 kW and Release QAA fan
param [4337.1] = ON ................................................................................................... 538
6.35.7 Sequence diagram for burner capacities ≤120 kW and Release QAA fan
param [4337.1] = OFF ................................................................................................. 539
6.35.8 Sequence diagram for burner capacities >120 kW and Release QAA fan
param [4337.1] = OFF >120 kW”.................................................................................540
6.35.9 Repetition counter ....................................................................................... 544
6.35.10 Description of sequence diagrams .............................................................. 545
6.35.11 Fan speed control........................................................................................551
6.35.12 Filter for fan speed setpoint (OEM) ............................................................. 552
6.36 PWM limitation............................................................................................. 556
6.36.1 Supervising air supply by monitoring current fan speed.............................. 556
6.37 Chimney drying............................................................................................ 558
6.38 Fan parameters settable as load values via QAA75…/AVS37… ................ 559
6.38.1 Limitation of ionization current..................................................................... 566
6.38.2 Ionization current maintenance ................................................................... 567
6.39 Modulating pump ......................................................................................... 568
6.39.1 Modulation of heating circuit pump.............................................................. 568
6.39.2 Behavior when burner cycles ...................................................................... 570
6.39.3 Limitation of boiler temperature differential ................................................. 571
6.39.4 Conditions for limiting the boiler’s temperature differential.......................... 572
6.39.5 Limitation dependent on pump modulation.................................................. 572
6.39.6 Limitation to the maximum differential ......................................................... 573
6.39.7 Limitation to the nominal differential ............................................................ 574
6.40 List of displays ............................................................................................. 575
6.40.1 Error code list .............................................................................................. 575
6.40.2 Maintenance code ....................................................................................... 578
6.41 Lockout/local reset....................................................................................... 579
6.41.1 Lockout ........................................................................................................ 579
6.41.2 Local reset via the reset button ................................................................... 579
6.42 Remote reset ............................................................................................... 580
6.42.1 Additional activation of remote reset capability ...........................................580
6.42.2 Restrictions in connection with remote reset ...............................................580
6.43 Production ................................................................................................... 581
6.43.1 Monitoring mains voltage/mains frequency ................................................. 583
7Plant diagrams............................................................................................. 584
7.1 Basic diagrams ............................................................................................ 584

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7.2 Extra functions .............................................................................................585
8Technical data..............................................................................................586
8.1 LMS14… basic unit......................................................................................586
8.1.1 General data ................................................................................................586
8.1.2 Environmental conditions.............................................................................586
8.1.3 Electrical connection data, mains voltage connections................................587
8.1.4 Electrical connection data, extra-low voltage connections (PELV) ..............589
8.1.4.3. Inputs B7/BX4 ..............................................................................................589
8.1.4.4. Inputs B3/B38 ..............................................................................................590
8.1.4.5. Inputs BX1/BX2/BX3....................................................................................590
8.1.4.6. Input B9........................................................................................................590
8.1.4.7. Input H1 .......................................................................................................590
8.1.4.8. Input H3 .......................................................................................................591
8.1.4.9. Input H4 .......................................................................................................591
8.1.4.10. Input H5 .......................................................................................................591
8.1.4.11. Input H6 .......................................................................................................592
8.1.4.12. Input H7 .......................................................................................................592
8.1.4.13. Input for reset (EK).......................................................................................592
8.1.5 PWM fan/Hall connection facility..................................................................592
8.1.6 PWM pump connection P1 ..........................................................................593
8.1.7 PWM output/10 V output UX2/UX3..............................................................593
8.1.8 Control of diverting valve .............................................................................593
8.1.9 BSB users ....................................................................................................594
8.1.10 Outputs for LED flame and LED fault (X30).................................................594
8.1.11 Cross-sectional area sensors ......................................................................594
8.2 Parameter stick AGU2.56xx109...................................................................595
8.3 Sensor characteristics..................................................................................596
8.3.1 NTC 1k.........................................................................................................596
8.3.2 NTC 10k.......................................................................................................597
8.3.3 Pt1000..........................................................................................................597
8.3.4 NTC 20k.......................................................................................................598
9List of figures................................................................................................599

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1 Summary 28.01.2015
1 Summary
The present User Manual describes handling and configuration of the following
products for OEMs:
Product no.
(ASN) Description Documentation no.
LMS14... Boiler management unit
CC1E7471
CC1U7471
CC1U7472
AGU2.560... Parameter stick for LMS..., can be read out CC1U7471
AGU2.561... Parameter stick for LMS..., writable CC1U7471
AGU2.563... Parameter stick for direct programming of the LMS... CC1U7471
AGU2.564... Parameter stick for spare part programming of the LMS... CC1U7471
1.1 Supplementary documentation
Description Documentation
no.
Environmental Declaration LMS... CC1E7471
Data Sheet LMS… N7471
Product range overview LMS… Q7471
For more information about accessories, refer to the following documents:
Product no.
(ASN) Description Documentation no.
LMS15... Boiler management unit CC1U7472
Product range Product range overview Albatros² CE1Q2359
System Albatros2system CE1P2359_08
Partial Diagrams Albatros2Hydraulic Partial Diagrams and Extra Functions CE1P2359_10
AGU2.550... Extension ClipIn for LMS... CC1N7492
AGU2.551... Extension ClipIn for PWM (DC 0...10 V) CC1N7493
AGU3.6... Gas/air mixer CC1N7211
AGU3.7... Gas/air mixer CC1N7214
AVS13.399... Wireless outside sensor CE1U2354
AVS14.390... Wireless repeater CE1U2354
AVS37.294... Operating unit (Clear-text) CE1U2353
AVS37.390... Operating unit (Basic) CE1U2358
AVS71.390... Wireless module CE1U2354
AVS71.393... Wireless module BSB CE1U2358
AVS75.390... Extension module CE1U2353
AVS75.391... Extension module CE1U2354
OCI345.06/101 LPB ClipIn CC1U2355xx_04
QAA55.110... Room unit basic CE1U2353
QAA75.610... Room unit wire CE1U2353
QAA75.611... Room unit wire, with backlit display CE1U2353
QAA78.610... Room unit wireless CE1U2353
QAC34/101 Outside sensor NTC 1k CC1Q1701

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Product no.
(ASN) Description Documentation no.
QAD36/101 Strap-on temperature sensor NTC 10k CC1Q1808
QAZ36.522/109 Immersion temperature sensor NTC 10k CC1Q1843
QAZ36.526/109 Immersion temperature sensor NTC 10k CC1Q1843
OCI430... Interface module for PC-LMS... connection CC1N7635
OCI700 Service tool CC1E5655
TQG42... Ignition module, combined with connection line for LMS14..., suitable
for VGU smart gas valves CC1N7630
VGU7xS... Combination gas valves CC1N7668
VGU8xS... Combination gas valves CC1N7668
ACS420 Software for OCI430... ---
ACS432 Parameter stick manager CC1J7474
ACS435 Setup manager CC1J7471
ACS700 Remote supervision software/parameterization software for OCI700 Software CD
LMS14... are digital boiler management units (BMUs) for use with gas-fired
appliances equipped with premix burners. They are used for startup, control and
supervision of premix burners with capacities from <10 kW to 1 MW in intermittent
operation with direct ignition of the main flame.
The OEM must make certain that the LMS14… are suited for the application in
question.
The LMS14... provide all supervisory and control functions required for burner
operation, space heating and DHW heating. They also offer modular system
extensions in the form of integrated communication interfaces. Output modulation
is performed via a PWM-controlled fan with pneumatic gas-air ratio control.
1.2 Target group of users
Target group of users are OEMs
LMS14…

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1.3 Product range summary
1.3.1 Topology
Remote
Service tool
Mobile, SMS, Pager , Fax ,
WEB
Te le f on
Network
Te le f on
SMS
OCI 611
OCI7. ..
ACS700
BSB : Boiler System Bus
Service Unit
(RU)
HMI
HMI
(RU)
Basic Unit
LMS...
Extension
mod. AVS 75…
(max. 3)
BSB- W
LPB : Local Process Bus
Basic Unit
LMS... / RVS...
LPB
Service tool
OCI430
ACS420
7471z01e/1210
OCI345...
Room Unit
Figure 1: Product range summary – wired
Remote
Service tool
Mobile , SMS, Pager , Fax ,
WEB
Te le f o n
Network
Te le f o n
SMS
OCI611OCI700
RF
Modul
ACS700
BSB : Boiler System Bus
Room Unit
RF
Repeater
RF
To u t s i d e
BSB-RF
Service Unit
(RU)
HMI
(RU)
Wireless Wireless Wireless
Basic Unit
LMS...
Extension
mod. AVS75...
(max. 3)
BSB -W
LPB : Local Process Bus
Basic Unit
LMS.../ RVS...
LPB
Service tool
OCI430
ACS420
7471z02e/1210
OCI345...
Figure 2: Product range summary – wireless
Wired
Wireless

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1.3.2 Operating options
Wired Wireless
A
T
A
T
Wired Wireless
A
T
Reset
+
A
T
Reset
+
Wired Wireless
A
T
D
A
T
D
Key
A Basic unit LMS14...
B Room unit QAA55.../QAA75.../QAA78...
C Outside sensor AVS13...
D Operator unit AVS37.294... (Clear-text)
D1 Operator unit AVS37.390... (Basic)
E RF module AVS71...
Operation via room unit
Operation via operator unit
Basic (optionally with
additional room unit)
Operation via operator unit
Clear-text (optionally with
additional room unit)

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2 Safety notes
2.1 Notes on product liability
The LMS14… may only be used in building services plant and only in compliance
with the applications covered by this document
When employing the products, all requirements specified in chapters Handling and
Technical data must be satisfied
Local safety regulations (installation, etc.) must be complied with
The units must not be opened. If not observed, warranty by Siemens becomes void
Danger!
Do not open, interfere with or modify the units!
All activities (mounting, installation, service work, etc.) must be performed by
qualified personnel
Before performing any work in the connection area of the LMS14…, disconnect the
unit 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
Ensure protection against electric shock by providing adequate protection for the
unit’s terminals
After any kind of activity (mounting, installation, service work, etc.), check to ensure
that wiring is in an orderly state, that all safety functions are performed correctly
and that the parameter settings are correct
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
AC 230 V terminals that are not used must be protected by dummy plugs fitted by
the burner manufacturer
Never connect or disconnect the stepper motors (WX1 connected to X16 or
X16a) when live. If not observed, the built-in driver stage can be damaged
Siemens will not assume liability for damage resulting from unauthorized
interference!
If fuses inside the LMS15… are blown, the unit must be returned to Siemens. The
mains fuse (FB01/FB02) may be replaced once. Since overcurrents can damage
relays, a plant safety check must be made.
Electromagnetic emissions must be checked on an application-specific basis!
The choice of applications and scope of functions covered by this User Manual
shall serve as a guideline. The correct operation of the plant must be checked
and proven by function tests made on the heating appliance and the relevant
plant!
Danger!
At the OEM’s request, the quick connector for the mechanical STB (SLT = safety limit
thermostat) on the printed circuit board can be bridged ex factory. In that case, the
mechanical SLT would be deactivated. When using a mechanical SLT, the resistor
must always be removed. LMS14... with different type numbers must never be mixed
up.

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2.1.1 Use of high-efficiency pumps
When using high-efficiency pumps or pumps with integrated electronics, the
resulting switch-on currents can adversely affect the relays’ service life. For this
reason, use of these types of pump is permitted only if authorized in writing by
Siemens.
2.1.2 High-voltage test
Caution!
When making 100% inspections to DIN EN 60335-1, Addendum A, only AC
voltage may be applied. If tests are conducted with DC voltage, the LMS14...
might be damaged.

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2.2 Environmental compatibility
The units contain electrical and electronic components and must not be disposed of
together with domestic waste.
Local and currently valid legislation must be complied with!
2.3 Lifecycle
The LMS14… have a designed lifetime* of 250,000 burner startup cycles which, under
normal operating conditions in Heating mode, correspond to approx. 10 years of usage
(starting from the production date indicated on the type field).
This lifetime is based on the endurance tests in the standard EN 298.
A summary of the conditions has been published by the European Control
Manufacturers Association (Afecor) (www.afecor.org).
The designed lifetime is based on usage of the LMS14… as specified in the
manufacturer’s Data Sheet and User Manual. After reaching the designed lifetime in
terms of the number of burner startup cycles, or the respective time of usage, the
LMS14… are to be replaced by authorized personnel.
* The designed lifetime is not identical with the warranty time specified in the Terms of
Delivery
2.4 Standards and certificates
Conformity to EEC directives
- Electromagnetic compatibility EMC (immunity)
- Directive for gas-fired appliances
- Low-voltage directive
2004/108/EC
2009/142/EC
2006/95/EC
ISO 9001:2008
ISO 14001:2004
OHSAS 18001:2007
Identification code to EN 298: 2003 chapter 4: F M C L B N
Disposal

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2.5 Typographical conventions
2.5.1 Safety notes
This User Manual contains instructions which must be observed to ensure your
personal safety and to prevent damage to equipment and property. The instructions
and notes are highlighted by warning triangles, arrows or information symbols and are
presented as follows, depending on the hazard level:
Danger means that death, severe personal injury or substantial
property damage will occur if adequate precautionary
measures are not taken.
Warning means that death, severe personal injury or substantial
property damage can occur if adequate precautionary
measures are not taken.
Caution means that minor personal injury or property damage
can occur if adequate precautionary measures are not
taken.
Note draws your attention to important information on the
product, on product handling, or to a special part of the
documentation.
Reference refers to further information given in other pieces of
documentation or in chapters of this document.
Only qualified personnel are allowed to install and operate the equipment. Qualified
personnel in the context of the safety-related notes contained in this document are
persons who are authorized to commission, ground and tag devices, systems and
electrical circuits in compliance with established safety practices and standards.
Note the following:
The LMS14… may only be used on applications covered by the technical description.
The use of unsuitable or incorrectly installed accessories can lead to personal injury or
damage to property.
When using the unit in connection with third-party products or components, following
must be noted:
- The technical data of the LMS14… must be observed; in addition to static data,
consideration must be given to dynamic data, such as switch-on and switch-off
currents, surge currents, etc.
- EMC-specific properties or retroactive effects can adversely affect the unit’s life and
reliability and must be checked by the customer
- The OEM as the system integrator must ensure compliance with the relevant
regulations and make certain the correct fuses are used
- Siemens assumes no responsibility for the system
The products can only function correctly and safely if shipped, stored, set up and
installed correctly, and operated and maintained as specified.
Qualified personnel
Correct use