Siemens LMV27.100x2 Operator's manual
Software version
V03.70
CC1P7541en
17.12.2018 Building Technologies
LMV27.100x2
Basic unit with integrated air-fuel ratio control for
forced draft burners
Basic Documentation
The LMV27 and this Basic Documentation are intended for OEMs which integrate the units in their products!
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Supplementary documentation
User Documentation Modbus AZL2........................................................................ A7541
Environmental Product Declaration LMV2 / LMV3.................................................. E7541
Installation and Operating Instructions PC Software ACS410 .................................J7352
Data Sheet LMV27..................................................................................................N7541
Product Range Overview LMV2 / LMV3 .................................................................Q7541
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Contents
1Safety notes ................................................................................................... 9
1.1Warning notes .................................................................................................9
1.2Mounting notes.............................................................................................. 10
1.3Installation notes............................................................................................11
1.4Electrical connection of the LMV27 ............................................................... 12
1.5Connection BCI via integrated RJ11 jack (X56) ............................................ 13
1.6Electrical connection of flame detectors ........................................................14
1.7Commissioning notes ....................................................................................15
1.8Notes on settings and parameter settings..................................................... 17
1.9Standards and certificates ............................................................................. 18
1.10Service notes................................................................................................. 19
1.11Life cycle........................................................................................................ 19
1.12Disposal notes ............................................................................................... 19
2System structure / function description.................................................... 20
2.1For Europe..................................................................................................... 20
2.2General information....................................................................................... 21
3Type summary .............................................................................................21
4Technical Data .............................................................................................22
4.1LMV27 basic unit ........................................................................................... 22
4.1.1Terminal loading Inputs................................................................................. 22
4.1.2Terminal loading Outputs ..............................................................................23
4.1.3Analog output / load output X74 pin 3 ...........................................................23
4.1.4Cable lengths................................................................................................. 24
4.1.5Cross-sectional areas.................................................................................... 24
4.1.6Connections of actuators............................................................................... 24
4.2AGV50 signal cable from AZL2 BCI..........................................................25
4.3Environmental conditions ..............................................................................25
4.4Flame detectors............................................................................................. 26
4.4.1Ionization probe............................................................................................. 26
4.4.2UV flame detectors QRA2 / QRA4 / QRA10.................................................. 28
4.4.3Photoresistive flame detectors QRB1 / QRB3...............................................29
4.4.4Yellow flame detector QRB4 .........................................................................30
4.4.5Blue-flame detectors QRC............................................................................. 31
5Dimensions ..................................................................................................32
5.1LMV27 ...........................................................................................................32
6Display and diagnostics .............................................................................33
7Basic unit LMV27......................................................................................... 33
7.1Description of inputs and outputs .................................................................. 33
7.2Flame detectors............................................................................................. 34
7.2.1Loss of flame .................................................................................................34
7.2.2Extraneous light............................................................................................. 35
7.2.3No flame at the end of safety time (TSA) ......................................................35
7.2.4Flame intensity ..............................................................................................35
7.2.5Supervision of flame detector ........................................................................ 35
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7.3Digital input ....................................................................................................36
7.3.1Safety loop X3–04, pin 1 and 2......................................................................36
7.3.2Burner flange X3–03, pin 1 and 2 ..................................................................37
7.3.3Input for external load controller (ON / OFF) X5–03, pin 1 ............................37
7.3.4Inputs X5–03 pin 2 and 3 (Opening / Closing or stage 2 / stage 3) ...............37
7.3.5Air pressure switch X3–02 .............................................................................38
7.3.6Gas pressure switch for valve proving X9-04 ................................................39
7.3.7Gas / oil pressure switch-min, start release gas X5-01..................................40
7.3.8Setting the time for making the pressure switch test .....................................42
7.3.9Gas / oil pressure switch-max / oil pressure-max or POC contact, start
release oil X5–02 ...........................................................................................43
7.3.10Reset X8-04, pin 1 .........................................................................................44
7.4Digital outputs ................................................................................................45
7.4.1Output alarm type No-SI – X3–05, pin 2........................................................45
7.4.2Fan motor contactor type SI – X3–05, pin 1 ..................................................45
7.4.3Continuous fan operation – X3–05, pin 3.......................................................45
7.4.4Output ignition type SI (IGNITION) – X4–02..................................................46
7.4.5Outputs fuel valves V1 / V2 / V3 / PV, type SI – X8–02, X7-01, X7-02..........47
7.4.6Output safety valve type SI – X6–03..............................................................47
7.4.7Output for indication of operation X8-04, pin 2 ..............................................47
7.5Program sequence.........................................................................................48
7.5.1Time parameters............................................................................................48
7.5.2Valve proving .................................................................................................49
7.5.2.1.Valve proving with separate pressure switch X9-04 ......................................50
7.5.2.2.Valve proving via gas pressure switch-min X5-01 .........................................51
7.5.2.3.Lockout phase (phase 00) .............................................................................51
7.5.2.4.Safety phase (phase 01)................................................................................52
7.5.3Special functions during the program sequence............................................53
7.5.3.1.Reset / manual lockout ..................................................................................53
7.5.3.2.Alarm upon start prevention...........................................................................54
7.5.3.3.Possible start preventions..............................................................................54
7.5.3.4.Repetition counter..........................................................................................55
7.5.3.5.Start without prepurging (as per EN 676) ......................................................57
7.5.3.6.Gas shortage program...................................................................................58
7.5.3.7.Program stop function....................................................................................59
7.5.3.8.Forced intermittent operation (<24 hours) .....................................................59
7.5.3.9.Low-fire shutdown..........................................................................................59
7.5.3.10.Continuous fan...............................................................................................60
7.5.3.11.Test function for approval of burner – loss-of-flame test (TÜV test) ..............61
7.5.3.12.Postpurging in the lockout position ................................................................62
7.6Fuel trains (application examples) .................................................................63
7.7Sequence diagrams.......................................................................................71
7.7.1Gas direct ignition «G», «G mod», «G mod pneu»........................................71
7.7.2Gas pilot ignition 1 «Gp1», «Gp1 mod», «Gp1 mod pneu»...........................72
7.7.3Gas pilot ignition 2 «Gp2», «Gp2 mod», «Gp2 mod pneu»...........................73
7.7.4Light oil direct ignition «Lo», «Lo mod», «Lo 2 stage», « Lo 3-stage»...........74
7.7.5Light oil – pilot ignition «LoGp»«LoGp mod» «LoGp 2-stage» ......................75
7.7.6Legend to the sequence diagrams.................................................................76
8Selection of operating mode.......................................................................79
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8.1Deleting curves.............................................................................................. 81
9Connection to load controllers .................................................................. 82
9.1Load controller on contact X5-03, pin 1......................................................... 82
9.2External load controller via contacts X5-03, pin 2 / pin 3...............................82
9.3Default output via building automation – X92 ................................................ 85
9.4Manual output................................................................................................ 86
9.5Output with curve settings .............................................................................86
9.6Prioritization of load controller sources..........................................................87
9.6.1Emergency operation with several load controller sources ........................... 87
9.6.2Manual control............................................................................................... 87
10Electronic air-fuel ratio control ..................................................................89
10.1General.......................................................................................................... 89
10.2Behavior outside the operating positions.......................................................89
10.2.1Traveling speed............................................................................................. 89
10.2.2Home position................................................................................................89
10.2.3Prepurging ..................................................................................................... 89
10.2.4Ignition ........................................................................................................... 90
10.2.5Postpurging ...................................................................................................90
10.3Modulating operation..................................................................................... 91
10.3.1Definition of curves ........................................................................................ 91
10.3.2Traveling speed/maximum curve slope ......................................................... 92
10.3.3Entering the running position......................................................................... 92
10.3.4Operating position .........................................................................................92
10.3.5Limitation of modulation range ......................................................................93
10.3.6Setting the minimum and maximum output ...................................................94
10.4Multistage operation ......................................................................................95
10.4.1Definition of curves ........................................................................................ 95
10.4.2Traveling speed............................................................................................. 95
10.4.3Adjustment of output...................................................................................... 96
10.4.4Entering the operating position...................................................................... 96
10.4.5Operating position .........................................................................................96
10.4.6Limitation of modulation range ......................................................................97
10.5End of operating position............................................................................... 97
10.6Notes on settings and parameter settings..................................................... 97
11Actuators X53 / X54 ..................................................................................... 98
11.1Function principle ..........................................................................................98
11.2Definition of angles ........................................................................................ 98
11.3Referencing ...................................................................................................99
11.3.1Reference travel ..........................................................................................101
11.4Direction of rotation .....................................................................................103
11.5Monitoring the actuator positions.................................................................104
11.6Changing the error detection band for monitoring the actuator
positions ......................................................................................................105
11.7Forced travel................................................................................................ 105
11.8Detection of line interruptions ...................................................................... 105
11.9Protection against actuator mixup ............................................................... 106
11.9.1Proposal for implementation........................................................................ 106
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12Load output X74 pin 3 ...............................................................................107
12.1Safe separation of mains voltage and extra low-voltage ............................107
12.2Modulating operation ...................................................................................108
12.32-stage operation.........................................................................................108
12.43-stage operation.........................................................................................108
13Fuel meter input X75 pin 1 / X75 pin 2 .....................................................109
13.1Configuration of fuel meter...........................................................................109
13.1.1Types of fuel meters ....................................................................................109
13.1.2Configuration of pulses per volume unit.......................................................109
13.1.3Reading and resetting the meter readings...................................................109
13.2Fuel throughput............................................................................................110
13.2.1Configuration................................................................................................110
13.2.2Reading out the fuel throughput...................................................................110
14Connection and internal diagram.............................................................111
15Special feature: Burner identification ......................................................112
16Connection to superposed systems ........................................................112
16.1General information and building automation functions...............................112
16.2Modbus ........................................................................................................113
17PC software ACS410..................................................................................114
18Error history ...............................................................................................115
18.1Error classes................................................................................................115
18.2Makeup of error history................................................................................116
19Lifecycle function ......................................................................................117
20Safety notes on use of the AZL2 ..............................................................117
21Operating via AZL2 unit ............................................................................118
21.1Description of unit / display and buttons ......................................................118
21.2Meaning of symbols on the display..............................................................119
21.3Brightness of display....................................................................................119
21.4Special functions..........................................................................................120
21.4.1Manual lockout.............................................................................................120
21.4.2Manual control (manual request for output).................................................121
21.5Timeout for menu operation.........................................................................122
21.6Backup / restore...........................................................................................122
21.6.1Backup .........................................................................................................123
21.6.2Restore ........................................................................................................125
22Operation of LMV27 via the AZL2.............................................................127
22.1Normal display .............................................................................................127
22.1.1Display in standby mode..............................................................................127
22.1.2Display during startup / shutdown................................................................127
22.1.2.1.Display of program phases ..........................................................................127
22.1.2.2.Display of program phase with remaining running time until end of the
phase is reached..........................................................................................127
22.1.2.3.List of phase displays...................................................................................128
22.1.3Display of operating position........................................................................129
22.1.4Fault status message, display of errors and info .........................................130
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22.1.4.1.Display of errors (faults) with lockout...........................................................130
22.1.4.2.Reset‘ ..........................................................................................................130
22.1.4.3.Activating info / service mode from lockout ................................................. 130
22.1.4.4.Error with safety shutdown .......................................................................... 131
22.1.4.5.General information..................................................................................... 131
22.1.4.6.Start prevention ...........................................................................................131
22.1.4.7.Safety loop................................................................................................... 131
23Menu-driven operation..............................................................................132
23.1Assignment of levels....................................................................................132
24Info level .....................................................................................................133
24.1Display of info level......................................................................................133
24.2Display of info values (examples)................................................................134
24.2.1Identification date ........................................................................................134
24.2.2Identification number ...................................................................................134
24.2.3Burner identification..................................................................................... 135
24.2.4Number of startups resettable .....................................................................136
24.2.5Total number of startups.............................................................................. 137
24.2.6End of info level ........................................................................................... 137
25Service level............................................................................................... 138
25.1Display of service level ................................................................................138
25.2Display of service values (example) ............................................................139
25.2.1Number of faults ..........................................................................................139
25.2.2Error history................................................................................................. 139
25.2.3Intensity of flame .........................................................................................139
25.2.4End of service level .....................................................................................139
26Parameter level ..........................................................................................140
26.1Entry of password........................................................................................ 141
26.2Entry of burner identification........................................................................ 143
26.3Change of heating engineer’s password ..................................................... 145
26.4Change of OEM’s password........................................................................ 146
26.5Use of parameter level ................................................................................147
26.6Structure of parameter levels ......................................................................148
26.7Parameters without index, with direct display..............................................149
26.7.1Using the example of parameter 208: Program stop................................... 149
26.8Parameters without index, with no direct display (with parameters
having a value range > 5 digits) ..................................................................151
26.8.1Using the example of parameter 162: Operating hours resettable.............. 151
26.9Parameter with index, with direct display ....................................................153
26.9.1Using the example of parameter 501: No-flame positions fuel actuator......153
26.10Parameters with index, with no direct display..............................................155
26.10.1Using the example of parameter 701: Errors...............................................155
26.11Fuel / air ratio curves – settings and commissioning................................... 158
26.11.1Initial commissioning ...................................................................................158
26.11.2Setting curvepoints P0 and P9 for modulating mode («G mod», «Gp1
mod», «Gp2 mod» and «Lo mod»).............................................................. 161
26.11.3Setting curvepoints P0 and P9 for «G mod pneu», «Gp1 mod pneu»
and «Gp2 mod pneu».................................................................................. 162
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26.11.4Warm settings for modulating mode («G mod», «Gp1 mod», «Gp2
mod» and «Lo mod»)...................................................................................163
26.11.5Warm settings for modulating mode («G mod pneu», «Gp1 mod pneu»
and «Gp2 mod pneu»).................................................................................168
26.11.6Cold settings for «G mod», «Gp1 mod», «Gp2 mod» and «Lo mod»..........168
26.11.7Cold settings for «G mod pneu», «Gp1 mod pneu» and «Gp2 mod
pneu»...........................................................................................................169
26.11.8Editing the curvepoints.................................................................................170
26.11.9Interpolation of curvepoints..........................................................................171
26.11.10Setting of curvepoints for multistage mode («Lo 2 stage» and «Lo 3
stage»).........................................................................................................174
26.11.11Warm settings for «Lo 2 stage» and « Lo 3 stage» .....................................175
26.11.12Cold settings for multistage mode («Lo 2 stage» and « Lo 3 stage»)..........179
26.11.13Intensity of flame during curve settings........................................................180
27Parameter list .............................................................................................181
28Error code list (of all LMV2 / LMV3 types) .................................................193
29Revision history LMV27 ............................................................................210
30List of figures .............................................................................................217
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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!
LMV27 are safety devices! Do not open, interfere with or modify the units.
Siemens does not assume responsibility for damage resulting from unauthorized
interference!
Additional safety notes contained in other chapters of this document must be
observed as well!
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 LMV27 must be ensured
through adequate mounting by the burner or boiler manufacturer
Before performing any work in the connection area of the plant, disconnect the unit
from the 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 LMV27 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 LMV27 manually
The following plug-on terminations carry FELV (Functional Extra Low Voltage) (also
refer to chapter Electrical connection of the LMV27) 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 plugs of the connecting cables for the LMV27 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 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)
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To ensure safety and reliability of the LMV27, the following points must also be
observed:
Condensation and ingress of humidity must be avoided. Should such conditions
occur, make sure that the unit will be completely dry before switching on again!
Static charges must be avoided since they can damage the unit’s electronic
components when touched.
Recommendation: Use ESD equipment
If the unit fuse was blown due to overload or a short-circuit at the connection
terminals, the LMV27 must be replaced since the switching contacts might have
been damaged
If error codes 95…98 appear during operation, this may be an indication of contact
problems and the LMV27 should be replaced
1.2 Mounting notes
Ensure that the relevant national safety regulations and standard notes are
complied with
In geographical areas where DIN regulations are in use, the requirements of VDE
must be satisfied, especially DIN / VDE 0100, 0550 and DIN / VDE 0722
The LMV27 must be secured with fixing screws M4 (UNC32) or M5 (UNC24),
observing a maximum tightening torque of 1.8 Nm and using all 4 fixing points. The
additional mounting surfaces on the housing are provided to improve mechanical
stability. These must fully rest on the mounting surface to which the unit is secured.
The flatness of that mounting surface must be within a tolerance band of 0.3 mm
Additional mounting surfaces
122
Outer contour of housing
(103.5)
6.5
103.5
10
217
M5 x 4
0.3
7541z298e/0606
Figure 1: Note on mounting
Notes on mounting
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1.3 Installation notes
Always run the high-voltage ignition cables separate from the unit and other cables
while observing the greatest possible distances
Ensure that the electrical wiring inside the boiler is in compliance with national and
local safety regulations
Mains power must always be supplied via Land N.
This means that no potential differential must exist between the neutral conductor N
and protective conductor PE
Phase and neutral conductor must not be interchanged (dangerous malfunctions,
loss of protection against electric shock hazard, etc.)
Make certain that strain relief of the connected cables is in compliance with the
relevant standards (e.g. as per DIN EN 60730 and DIN EN 60335)
Ensure that spliced wires cannot get into contact with neighboring terminals. Use
adequate ferrules
The burner manufacturer must protect unused terminals of the LMV27 by fitting
dummy plugs (exception: X64 (reserve) and X74)
When making the wiring, the AC 230 V section must be strictly separated from other
voltage sections, thus ensuring protection against electric shock hazard. For more
detailed information, refer to chapter Electrical connection of the LMV27
The connectors of the connecting cables for the LMV27 may only be removed or
exchanged when the plant is turned off (all-polar disconnection), since the BCI does
not provide safe separation from mains voltage
AGV50 signal cable between LMV27 and AZL2
Since the BCI carries FELV (refer to chapter Electrical connection of the LMV27),
the connection between LMV27 and AZL2 must be established via the AGV50
signal cable, or by ensuring compliance with the specification. The signal cable is
specified for use under the burner hood. When using other types of signal cable that
do not meet the specification requirements, safety against electric shock hazard is
not necessarily ensured
Do not lay signal cable AGV50 from the LMV27 to the AZL2 together with other
cables
Service operation with a longer signal cable from the LMV27:
If a longer signal cable is required for service work for example (short-time usage,
<24 hours), note that the above application under the burner hood no longer applies
and, for this reason, the signal cable can be subjected to increased mechanical
stress. In that case, use a reinforced signal cable
Both the signal cable AGV50 and the AZL2 must be shipped and stored so that no
damage due to dust and water can occur when the products are used in the plant
To ensure protection against electric shock hazard, make certain that, prior to
switching on power, the signal cable AGV50 is correctly connected to the AZL2
The AZL2 must be used in a dry and clean environment
The mechanical coupling between the actuators and the controlling elements for
fuel and air, or any other controlling elements, must be rigid
Once the LMV27 has been installed in the equipment, a check must be carried out
to ensure compliance with the EMC emission requirements!
When grounded PELV signals are connected to the SELV terminals of the burner
control, they also become PELV voltages (according to EN 60730-1, chapter 11.2.7,
EN 298 chapter 9.2.d)
An isolating transformer grounded on one side must be used if the wiring takes
place with a mains circuit without a grounded conductor or the mains supply
between the phases (in accordance with EN 298-1, chapter 9.2.d)
To prevent high-energy couplings due to magnetic induction or capacitive coupling,
the cable lengths must be >10 m on the detector cables and communication lines
with a shielded cable, grounded on both sides (based on requirements from EN
13611)
Testing torque of the screws RAST5 connector: 0.5 Nm
Testing torque of the screws RAST3.5 connector: 0.25 Nm
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1.4 Electrical connection of the LMV27
The LMV27 operates with the following low-voltages:
SELV (Safety Extra Low-Voltage) and PELV (Protective Extra Low-Voltage) ensure
protection against electric shock hazard
FELV (Functional Extra Low-Voltage) without safe separation offers no protection
which, in the event of fault, would not exclude risks
Mains voltage
SELV
PELV FELV
Mains voltage
Figure 2: Electrical connection
Note
SELV or PELV depends on the safety class of the connected components. In the case
of PELV, the relevant component is connected to protective earth.
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1.5 Connection BCI via integrated RJ11 jack (X56)
If the BCI (RJ11 jack) is not used, protection against electric shock hazard must be
provided (jack must be covered up)
The signal cable for the AZL2 or other accessories, such as the OCI410 interface
(plugs into the RJ11 jack), may be connected or disconnected only when the LMV27
is dead (all-polar disconnection), since the BCI does not ensure safe separation from
mains voltage
The AZL2 is designed for direct connection to the integrated RJ11 jack at the LMV27
The signal cable from the LMV27 to the AZL2 must conform to certain specifications.
Siemens has specified the signal cable for use under the burner hood. When using
signal cables of other manufacture, Siemens requirement are not necessarily met
Do not lay the signal cable from the LMV27 to the AZL2 together with other cables.
Use a separate cable
Service operation with a longer signal cable from the LMV27 to AZL2
If a longer cable is required for service work for example (short-time usage, <24
hours), note that the above application under the burner hood no longer applies and,
for this reason, the cable may be subjected to increased mechanical stress. In that
case, use a reinforced cable
Both the signal cable and the AZL2 must be shipped and stored in a way that no
damage due to dust and water can occur when the products are used in the plant
To ensure protection against electric shock hazard, make certain that, prior to
applying power, the signal cable is correctly connected to the AZL2
The AZL2 must be used in a dry and clean environment
Connection of OCI410 interface to the BCI
Connect the OCI410 interface without other extension to the USB port of your PC
according to the example given below.
ACS410
PC software
LMV...
OCI410
Bild 418e/0812
RJ11
USB2.0
Figure 3: Connection of OCI410 interface to the BCI
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1.6 Electrical connection of flame detectors
It is important to achieve practically disturbance- and loss-free signal transmission:
Never run the detector cables together with other cables
– Line capacitance reduces the magnitude of the flame signal
– Use a separate cable
Observe the permissible detector cable lengths
The mains-powered ionization probe is not protected against electric shock hazard.
It must be protected against accidental contact
Earth the burner in compliance with the relevant regulations; earthing the boiler
alone does not suffice
Locate the ignition electrode and the ionization probe such that the ignition spark
cannot arc over to the ionization probe (risk of electrical overloads)
Insulation resistance
- Must be a minimum of 50 Mbetween ionization probe and ground
- Soiled detector holders reduce the insulation resistance, thus supporting
creepage currents
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1.7 Commissioning notes
When commissioning the unit, check all safety functions
There is no absolute protection against incorrect use of the RASTx connectors. For
this reason, prior to commissioning the plant, check the correct assignment of all
connectors
Electromagnetic emissions must be checked on an application-specific basis
After the plant has been installed and commissioned, the person responsible for the
plant / heating engineer must document the parameterized values and settings (e.g.
curve characteristics) used for air-fuel ratio control.
These data can be printed out with the help of the ACS410 PC software, for example, or
must be written down.
This document must be kept in a safe place and checked by the expert.
Caution!
On the OEM level of the LMV27, parameter settings other than those specified in
the application standards can be made. For this reason, check whether the
parameter settings made are in compliance with the relevant application
standards (e.g. EN 676, EN 267, etc.), or whether the respective plant demands
special approval!
The selected setting values of fuel and combustion air must be assigned such that –
while giving consideration to the combustion chamber / fuel pressure, temperature and
combustion air pressure, as well as wear of actuators and controlling elements, etc. –
correct operation with sufficient amounts of excess air will be ensured across the
burner’s full output range for an extensive period of time (until the next regular
inspection is due; also refer to chapter Monitoring the positions). This must be proven by
the burner / boiler manufacturer by measuring the characteristic combustion process
values. If the standardization process is repeated, the air-fuel ratio control system must
be rechecked.
Prior to commissioning the system, the following points must be checked:
Parameterization of operating mode (e.g. «G mod», «Gp1 mod», «Lo mod», etc.)
must accord with the type of burner used (refer to chapter Selection of operating
mode)
Correct assignment of the valves to the valve outputs of the LMV27
Correct setting of the time parameters, especially the safety and prepurge times
Correct functioning of the flame detector in the event of loss of flame during
operation (including the response time), with extraneous light, during the prepurge
time and, when there is no establishment of flame, at the end of the ignition safety
time
Activation of the valve proving function and determination of the correct leakage
rate, if required by the application (refer to chapter Valve proving)
Fuel / air ratio
control system
LMV27
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The functions of the following available or required input status signals must be
checked:
Air pressure
Minimum gas pressure and maximum gas pressure or POC
Gas pressure valve proving
Minimum oil pressure and maximum oil pressure
Safety loop (e.g. safety limiter)
Action Check / response
a) Burner startup with flame detector darkened Lockout at the end of the first safety time
b) Burner startup with flame detector exposed to
extraneous light, e.g. to incandescent light with
detectors for visible radiation, quartz-halogen bulb
or cigarette lighter flame with detectors for UV
radiation
Lockout at prepurge time
c) Simulation of loss of flame during operation. For
that, darken the flame detector in the operating
position and maintain that state
Lockout or restart, depending on the LMV27’s
configuration
d) Check the plant’s response time with loss of flame
during operation. For that purpose, manually
disconnect the fuel valves from power and check
the time from this moment the LMV27 requires to
turn off power to the valve
Turning off power to the valves by the LMV27 within the
period of time permitted for the respective type of plant
e) Check the safe operation of the burner while giving
consideration to LMV27 tolerances
LMV27 tolerances are the result of a number of factors,
such as:
Tolerances of actuators plus mechanical linkage to
the controlling elements
Environmental conditions (temperature, air
conditions)
Type of fuel (calorific value / pressure)
Type of supply air path and flueways
Example of procedure for checking the burner’s
response to actuator tolerances:
Approach a output point in programming mode (e.g.
low-fire or high-fire)
Change the actuator’s position against the optimum
fuel-air ratio setting as can be expected in the case
of tolerances
Check the flue gas values with a flue gas analyzer
Recommendation:
Make this readjustment against the optimum fuel-air
ratio setting for one actuator at a time!
Further checks may be required, depending on the field of use and the relevant
standards.
Duties of the expert when making the approval tests
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1.8 Notes on settings and parameter settings
When adjusting the electronic air-fuel ratio control system integrated in the LMV27,
allow for sufficient amounts of excess air since – over a period of time – the flue gas
settings are affected by a number of factors (e.g. density of air, wear of actuators
and controlling elements, etc.). For this reason, the flue gas values initially set must
be checked at regular intervals
To safeguard against inadvertent or unauthorized parameter transfer from the
ACS410 PC software to the LMV27, the OEM must assign an individual burner
identification (ID) for each burner. Compliance with this regulation is mandatory to
ensure that the LMV27 prevents the transfer of parameter sets of some other plant
(with inadequate and possibly dangerous parameter values) to the LMV27 via the
ACS410 PC software. In addition, the air-fuel ratio control parameters must be
manually approached and the combustion values checked
With the LMV27, it is to be noted that the unit’s characteristics are determined
primarily by the specific parameter settings rather than the type of LMV27. This
means that, among other things, each time a plant is commissioned, the parameter
settings must be checked and the LMV27 must not be transferred from one plant to
another without adapting the parameter settings to the new plant
When using the ACS410 PC software, the safety notes given in the relevant
Installation and Operating Instructions (J7352) must also be observed
A password protects the parameter level against unauthorized access. The OEM
allocates individual passwords to the setting levels he can access. The default
passwords used by Siemens must be changed by the OEM. These passwords are
confidential and may only be given to persons authorized to access such setting
levels
The responsibility for setting the parameters lies with the person who – in
accordance with his access rights – made changes to the respective setting level
In particular, the OEM (burner and / or boiler manufacturer) assumes
responsibility for the correct parameter settings in compliance with the standards
covering the specific applications (e.g. EN 676, EN 267, EN 746-2, etc.).
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1.9 Standards and certificates
Applied directives:
Low-voltage directive 2014/35/EC
Directive for pressure devices 2014/68/EC
Gas Appliances Regulation (EU) EU/2016/426
Electromagnetic compatibility EMC (immunity) *) 2014/30/EC
*) The compliance with EMC emission requirements must be checked after the burner management
system is installed in equipment
Compliance with the regulations of the applied directives is verified by the adherence to
the following standards / regulations:
Automatic burner control systems for burners and appliances
burning gaseous or liquid fuels
DIN EN 298
Safety and control devices for gas burners and gas burning
appliances - Valve proving systems for automatic shut-off
valves
DIN EN 1643
Gas/air ratio controls for gas burners and gas burning
appliances - Part 2: Electronic types
DIN EN 12067-2
Safety and control devices for burners and appliances
burning gaseous and/or liquid fuels — General requirements
DIN EN 13611
Safety and control devices for gas burners and gas-burning
appliances - Particular requirements
Part 1: Automatic and semi-automatic valves
ISO 23552-1
Automatic electrical controls for household and similar use
Part 2-5:
Particular requirements for automatic electrical burner control
systems
DIN EN 60730-2-5
The relevant valid edition of the standards can be found in the declaration of
conformity!
Note on DIN EN 60335-2-102
Household and similar electrical appliances - Safety - Part 2-102:
Particular requirements for gas, oil and solid-fuel burning appliances having electrical
connections. The electrical connections of the LMV27 comply with the requirements of
EN 60335-2-102.
EAC Conformity mark (Eurasian Conformity mark)
ISO 9001:2015
ISO 14001:2015
OHSAS 18001:2007
China RoHS
Hazardous substances table:
http://www.siemens.com/download?A6V10883536
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1.10 Service notes
If fuses are blown, the unit must be returned to Siemens (refer to chapter
Warning notes)
Error diagnostics can only be made via the LMV27 (BC interface)
Note!
Only authorized persons may replace the fuse (according to EN 298-1, chapter 9.2.r)
1.11 Life cycle
The burner management system has 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 given on the type field).
This lifetime is based on the endurance tests specified in 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 use of the LMV27 according to the manufacturer’s
Data Sheet and Basic Documentation. After reaching the designed lifetime in terms of
the number of burner startup cycles, or the respective time of usage, the LMV27 is to be
replaced by authorized personnel.
* The designed lifetime is not the warranty time specified in the Terms of Delivery
1.12 Disposal notes
The unit contains electrical and electronic components and must not be disposed of
together with household waste. Local and currently valid legislation must be observed.
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2 System structure / function description
The LMV27 is a microprocessor-based burner management system with matching
system components for the control and supervision of forced draft burners of medium to
high capacity.
In the LMV27 are integrated:
Burner management system complete with valve proving system
Electronic air-fuel ratio control system for a maximum of 2 SQM3 or SQN1
actuators
Modbus interface
Figure 4: System structure
Example: Modulating gas burner
The system components (AZL2, actuators) are connected directly to the LMV27. All
safety-related digital inputs and outputs of the LMV27 are monitored by a contact
feedback network.
The diagram shows the full scope of functions of the LMV27. The actual functions are to
be determined based on the respective execution / configuration!
2.1 For Europe
For intermittent operation in connection with the LMV27, the ionization probe or the
QRA, QRB or QRC optical flame detectors can be used.
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