Siemens LME71 Operator's manual
Software version 02.03
CC1P7105en
24.07.2020
Smart Infrastructure
LME71… / LME72… / LME73…
Burner control
Basic Documentation
The LME7 and this Basic Documentation are intended for use by OEMs which
integrate the burner controls in their products.
2/116
Smart Infrastructure Basic Documentation LME7… CC1P7105en
Safety notes 24.07.2020
Supplementary documentation
Product type Designation Type of documentation Documentation number
PME71.111Ax Program module User Documentation A7105.1
PME71.112Ax Program module User Documentation A7105.2
PME71.401Ax Program module User Documentation A7105.3
PME71.402Ax Program module User Documentation A7105.4
PME71.901Ax Program module User Documentation A7105.5
LME71.901Ax Program module User Documentation A7105.6
PME72.521Ax *) Program module User Documentation A7105.11
PME72.541Ax *) Program module User Documentation A7105.12
PME73.810Ax Program module User Documentation A7105.21
PME73.811Ax Program module User Documentation A7105.22
PME73.812Ax Program module User Documentation A7105.23
PME73.820Ax Program module User Documentation A7105.24
PME73.830Ax Program module User Documentation A7105.25
PME73.831Ax Program module User Documentation A7105.26
PME73.840Ax Program module User Documentation (variant 1) A7105.27
PME73.840Ax Program module User Documentation (variant 2) A7105.28
LME73.231Ax Program module User Documentation A7105.29
LME Burner control Environmental Product Declaration E7105 *)
LME Burner control Product Range Overview Q7101
LME7 Burner control Data Sheet N7105
PME Program module Environmental Product Declaration E7105.1 *)
*) Only on request
Note
This document only refers to the product type – not the product designation. See the
table below for details.
Product type Product designation
ACS410 PC software
AZL2 Display and operating unit
LME7 Burner control
QRB1 Photo resistive detector
QRB3 Photo resistive detector
QRB4 Yellow flame detector
QRC Blue-flame detector
3/116
Smart Infrastructure Basic Documentation LME7… CC1P7105en
Contents 24.07.2020
Contents
1Safety notes..................................................................................................... 8
1.1Warning notes ................................................................................................. 8
1.2Mounting notes ................................................................................................ 9
1.3Installation notes............................................................................................ 10
1.4Electrical connection of flame detectors ........................................................ 11
1.5Commissioning notes .................................................................................... 12
1.6Standards and certificates ............................................................................. 13
1.7Lifetime .......................................................................................................... 14
1.8Disposal notes ............................................................................................... 14
1.9Typographical conventions............................................................................ 15
1.9.1Safety notes................................................................................................... 15
1.9.2Qualified personnel........................................................................................ 15
1.9.3Correct use .................................................................................................... 15
2System makeup / function description........................................................... 16
2.1Features ........................................................................................................ 17
3Type summary............................................................................................... 18
3.1Burner controls .............................................................................................. 18
3.2Program module ............................................................................................ 19
3.2.1PME7 with mains voltage AC 120 V.............................................................. 19
3.2.2PME7 with mains voltage AC 230 V.............................................................. 21
3.3External display and operating units.............................................................. 23
3.4Flame detectors............................................................................................. 24
3.5Actuators ....................................................................................................... 25
3.6Pressure switch ............................................................................................. 25
3.7Dummy plugs for RJ11 .................................................................................. 25
3.8Connector sets for LME7............................................................................... 26
3.9Service- tools................................................................................................. 27
4Technical data ............................................................................................... 28
4.1Basic unit LME7............................................................................................. 28
4.2Terminal rating Inputs.................................................................................... 29
4.3Terminal rating Outputs ................................................................................. 30
4.4Cable lengths................................................................................................. 32
4.5Actuators ....................................................................................................... 33
4.6Cross-sectional areas.................................................................................... 33
4.7RAST5 connector .......................................................................................... 34
4.8RAST3.5 connector ....................................................................................... 34
4.9Signal cable AGV50 ......................................................................................34
4.9.1AZL2 BCI .................................................................................................. 34
4/116
Smart Infrastructure Basic Documentation LME7… CC1P7105en
Contents 24.07.2020
4.10Dummy plug for RJ11.................................................................................... 34
4.11Environmental conditions .............................................................................. 35
4.12Flame supervision ......................................................................................... 36
4.12.1Ionization probe ............................................................................................. 36
4.12.2QRA2 / QRA4 / QRA10 (LME71 / LME73 only) ............................................38
4.12.3QRB1/QRB3/ QRB4 ...................................................................................... 39
4.12.4QRC............................................................................................................... 41
5Dimensions.................................................................................................... 42
6Function......................................................................................................... 43
6.1Preconditions for burner startup .................................................................... 43
6.2Undervoltage ................................................................................................. 43
6.3Controlled intermittent operation ...................................................................43
6.4Control sequence in the event of fault ........................................................... 44
6.5Resetting the LME7 ....................................................................................... 44
6.6Restart limitation............................................................................................ 45
6.6.1Restart in the event of loss of flame .............................................................. 45
6.6.2Repetition in case of no flame is established by the end of safety time
(TSA) ............................................................................................................. 45
7Operation, indication, diagnostics.................................................................. 46
7.1Operation....................................................................................................... 46
7.2Indication of operating state ..........................................................................46
7.3Diagnostics of cause of fault.......................................................................... 47
8Inputs / outputs .............................................................................................. 49
9Connection diagram AGG9 connector........................................................... 50
9.1LME71 ........................................................................................................... 50
9.2LME72 ........................................................................................................... 51
9.3LME73 ........................................................................................................... 52
10LME7 burner control ...................................................................................... 53
10.1Description of inputs and outputs .................................................................. 53
10.2Digital input.................................................................................................... 54
10.2.1Safety Loop terminal X3–04 pin 1 and 2 .......................................................54
10.2.2Input for external controller (ON/OFF) terminal X5–03 pin 1......................... 54
10.2.3Air pressure switch terminal X3–02 ............................................................... 55
10.2.4Input gas pressure switch-min.......................................................................55
11Multistage or modulating mode with actuator ................................................ 56
11.1Relevant parameters ..................................................................................... 56
11.1.1Connection diagram for feedback potentiometer ASZ12.33.......................... 56
5/116
Smart Infrastructure Basic Documentation LME7… CC1P7105en
Contents 24.07.2020
11.1.2Connection diagram for load controller (LME71/LME73 only)....................... 57
11.2Actuators ....................................................................................................... 57
11.3Function......................................................................................................... 57
11.4Load controller inputs .................................................................................... 58
11.4.13-position step input terminal X5-03 .............................................................. 58
11.4.2Analog input terminal X65 (LME71/LME73 only)........................................... 58
11.4.3Selection source preset output analog / 3-position step input
(parameter 654) (LME71/LME73 only) .......................................................... 58
11.4.4Actuator output terminal X2-09...................................................................... 58
11.4.5Setting the maximum running time of the actuator (parameter 259 /
260 timeout)................................................................................................... 58
11.5Multistage / modulating mode via 3-position step input terminal X5-03 ........59
11.5.1Maximum possible resolution ........................................................................ 59
11.6Modulating mode via analog input signal terminal X65 (LME71/LME73
only)............................................................................................................... 59
11.6.1Maximum possible resolution ........................................................................ 59
11.6.2Standardization of modulation range............................................................. 59
11.7Setting the minimum power control step (dead band) (parameter 123)
in modulating mode via analog input signal terminal X65
(LME71/LME73 only)..................................................................................... 60
User limitations / application examples .........................................................61
12Safety notes relating to operation of AZL2 .................................................... 62
13Operation via AZL2........................................................................................ 63
13.1Description of the unit / display and buttons.................................................. 63
13.2Meaning of symbols on the display ...............................................................64
13.3Special functions ........................................................................................... 64
13.3.1Manual lockout .............................................................................................. 64
13.4Operation....................................................................................................... 65
13.4.1Normal display............................................................................................... 65
13.4.1.1.Display in standby mode ...............................................................................65
13.4.1.2.Display during startup / shutdown .................................................................65
Display of program phases............................................................................ 65
List of phase display (display depending on program) .................................. 66
13.4.1.3.Display of operating position .........................................................................67
13.4.1.4.Fault status messages, display of errors and info ......................................... 68
Display of errors (faults) with lockout............................................................. 68
Reset 68
13.5Menu-driven operation................................................................................... 69
13.5.1Assignment of levels...................................................................................... 69
13.6Info level ........................................................................................................ 70
13.6.1Display of info level........................................................................................ 70
13.6.2Display of info values..................................................................................... 71
13.6.2.1.Identification date .......................................................................................... 71
6/116
Smart Infrastructure Basic Documentation LME7… CC1P7105en
Contents 24.07.2020
13.6.2.2.Identification number ..................................................................................... 71
13.6.2.3.Identification of burner ................................................................................... 72
13.6.2.4.Number of startups resettable ....................................................................... 73
13.6.2.5.Total number of startups................................................................................ 74
13.6.2.6.End of info level ............................................................................................. 74
13.7Service level .................................................................................................. 75
13.7.1Display of the service level ............................................................................ 75
13.7.2Display of service values ............................................................................... 76
13.7.2.1.Error history ................................................................................................... 76
13.7.2.2.Mains voltage ................................................................................................ 76
13.7.2.3.Intensity of flame ........................................................................................... 76
13.7.2.4.End of service level .......................................................................................76
13.8Parameter level ............................................................................................. 77
13.8.1Entering the password................................................................................... 78
13.8.2Changing the heating engineer's password .................................................. 80
13.8.3Changing the OEM's password .....................................................................82
13.8.4Backup........................................................................................................... 83
13.8.5Restore .......................................................................................................... 85
13.9Operating variants of the parameters ............................................................ 87
13.9.1Parameters without index, with direct display................................................ 87
13.9.1.1.Example of parameter 225 (prepurge time) on the parameter level.............. 87
13.9.2Parameters without index, with no direct display........................................... 89
13.9.2.1.Example of parameter 224 (specified time air pressure switch) on the
parameter level.............................................................................................. 89
13.9.3Parameters with index, with or without direct display .................................... 91
13.9.3.1.Example of parameter 701: Actual error on the service level........................ 91
14Error code list with operation via external AZL2 display................................ 94
15Operation via internal LED ............................................................................ 96
15.1Description of display and buttons................................................................. 96
15.2Normal display............................................................................................... 97
15.2.1Display in standby mode ...............................................................................97
15.2.2Display during startup / shutdown .................................................................97
15.2.2.1.Display of program phases............................................................................ 97
15.2.2.2.List of phase display ...................................................................................... 98
15.2.3Display of operating position .......................................................................100
15.3Special functions ......................................................................................... 100
15.3.1Manual lockout ............................................................................................ 100
15.4Fault status messages, display of errors ..................................................... 101
15.4.1Display of errors (faults) with lockout........................................................... 101
15.4.2Display of flame current ION or QRA ..........................................................102
15.4.3Reset ........................................................................................................... 102
7/116
Smart Infrastructure Basic Documentation LME7… CC1P7105en
Contents 24.07.2020
15.4.4Display of preset output............................................................................... 103
15.5Manual adjustment (depending on the PME7) ............................................ 104
15.5.1Position of actuator or speed of PWM fan in modulating operation with
analog signal ............................................................................................... 104
15.6Initial startup with a new PME7 or in case of replacement of the PME7 .....107
15.7Manual backup ............................................................................................ 109
15.7.1Error during backup process .......................................................................110
15.8Manual restore............................................................................................. 111
15.8.1Errors during the restore process ................................................................ 112
15.8.2Reset ........................................................................................................... 112
16List of figures ............................................................................................... 116
8/116
Smart Infrastructure Basic Documentation LME7... CC1P7105en
1 Safety notes 24.07.2020
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!
The LME7 are safety devices! Do not open, interfere with or modify the unit.
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!
All activities (mounting, installation and service work, etc.) must be performed by
qualified personnel
The burner or boiler manufacturer must ensure degree of protection IP40 for burner
controls as per DIN EN 60529 through proper installation of the LME7
If not observed, there will be a risk of electric shock
Before making any wiring changes in the connection area, completely isolate the
plant from mains supply (all-polar disconnection). Ensure that the plant cannot be
inadvertently switched on again and that it is indeed dead. If not observed, there is a
risk of electric shock hazard
Ensure protection against electric shock hazard by providing adequate protection for
the burner control’s connection terminals (e. g. with dummy plugs for inputs and
outputs not used). If not observed, there is a risk of electric shock hazard
Ensure protection against electric shock at the LME7 and at all connected electrical
components through proper installation. In terms of execution, stability and
protection, covers must conform to EN 60730. If not observed, there will be a risk of
electric shock
The area around the PME7 is defined as plugging space and therefore protected
against brush contact when the PME7 is not plugged in
Each time work has been carried out (mounting, installation, service work, etc.),
check to ensure that wiring and parameterization is in an orderly state and make the
safety checks as described in Commissioning notes. If not observed, there is a risk
of impairment of safety functions and of electric shock hazard
If the housing or the area near the operating panel is damaged, the unit must
immediately be put out of operation. If not observed, there is a risk of electric shock
hazard
Press the buttons on the operating panel only manually without using any tools or
pointed objects. If the film of the operating panel is damaged, there is a risk of
electric shock hazard
The data line for the AZL2 or other accessories, such as the OCI410 (plugs into the
BCI), must be connected or disconnected only when the burner control is dead (all-
polar disconnection), since the BCI does not ensure safe separation from mains
voltage. If not observed, there is a risk of electric shock hazard
If the BCI (jack RJ11) is not used, protection against electric shock hazard must be
provided (jack must be covered up). If not observed, there is a risk of electric shock
hazard
Fall or shock can adversely affect the safety functions. Such burner controls must
not be put into operation, even if they do not exhibit any damage. If not observed,
there is a risk of impairment of safety functions and of electric shock hazard
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 mains-powered ionization probe is not protected against electric shock hazard.
Protection against accidental contact must be ensured. If not observed, there is a
risk of electric shock hazard
9/116
Smart Infrastructure Basic Documentation LME7... CC1P7105enr
1 Safety notes 24.07.2020
To ensure safety and reliability of the LME7 system, 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! If not observed, there will be a risk of electric shock
-Static charges must be avoided since they can damage the unit’s electronic
components when touched.
Recommendation: Use ESD equipment
1.2 Mounting notes
Ensure that the relevant national safety regulations are complied with
In the 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 LME7 must be secured with fixing screws M4 (UNC32) or M5 (UNC24),
observing a maximum tightening torque of 1.8 Nm at all 3 fixing points. The
additional bearing surfaces on the housing are provided to improve mechanical
stability. The additional bearing surfaces must rest on the mounting surface. The
evenness of the mounting surface must be within a tolerance range of 0.3 mm
60
(42) 42
(73.9)
73.9
0.3
Outer contour housing
5
5
168.8
108.8
7113z05e/0810
Program module
Operating panel
13
13
13
13
1313
O5 (3x)
Figure 1: Mounting – mounting surface
Mounting surface
Installation notes
10/116
Smart Infrastructure Basic Documentation LME7... CC1P7105enr
1 Safety notes 24.07.2020
1.3 Installation notes
Always run the high-voltage ignition cable separate from the unit and other cables
while observing the greatest possible distance
Do not mix up live and neutral conductors
Install switches, fuses and earthing in compliance with local regulations
Risk of damage to the switching contacts!
If the external primary fuse (Si) is blown due to overload or short-circuit at the
terminals, the LME7 must be replaced.
The connection diagrams show the LME7 with an earthed neutral conductor. When
monitoring ionization currents in earth-free mains, connect terminal X10-05 pin 1 to
burner ground. It is essential to ensure that local regulations are complied with (e.g.,
protection against electric shock) since 230 V AC (50/60 Hz) mains voltage
produces a leakage current of 2.7 mA
Make certain that the maximum permissible current rating of the connection
terminals is not exceeded
Make certain that strain relief of the connected cables is in compliance with the
relevant standards
Do not feed external (mains) voltage to the control outputs of the LME7. When
checking the functions of the components controlled by the LME7 (fuel valves or
similar), the LME7 may, in principle, be connected to the components
Mains power must always be supplied via L and N. This means that no potential
differential must exist between the neutral conductor N and protective earth PE
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. If this is not observed, there is a risk of loss of safety functions or
a risk of electric shock
For protection, the burner manufacturer must fit dummy plugs to unused LME7
terminals
The connectors of the connecting cables for the LME7, may only be removed or
exchanged when the plant is shut down (all-polar disconnection), since the
connections (especially BCI interface) does not provide safe separation from mains
voltage
The mechanical coupling between the actuators and the controlling elements for
fuel and air, or any other controlling elements, must be rigid
Signal cable AGV50 from LME7 to AZL2 or from LME7 to OCI410:
Since the BCI has no safe separation from mains voltage, the signal cable AGV50
between LME7 and AZL2, or LME7 and OCI410, must conform to certain
specifications. Siemens has specified the signal cable AGV50 for use under the
burner hood (see Technical data). When using signal cables of other manufacture,
Siemens’ requirement will not necessarily be met
Do not lay the signal cable AGV50 from the LME7 to the AZL2 together with other
cables; use a separate cable
Service operation with a longer signal cable from LME7 to AZL2, or from LME7 to
OCI410:
If a longer signal cable is required for service work for example (short-time,
<24 hours), note that above usage under the burner hood no longer applies and, for
this reason, the signal cable can be subjected to increased mechanical stress. In
that case, extra cable sheathing is required
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 used in the plant later on
The AZL2 must be used in a dry and clean environment
Check the connecting lines of the air pressure switch for short-circuits
11/116
Smart Infrastructure Basic Documentation LME7... CC1P7105enr
1 Safety notes 24.07.2020
1.4 Electrical connection of flame detectors
It is important to achieve practically disturbance- and loss-free signal transmission:
Never run the detector cable together with other cables
– Line capacitance reduces the magnitude of the flame signal
– Use a separate cable
Observe the permissible detector cable lengths (see Technical Data)
The mains-powered ionization probe is not protected against electric shock hazard.
Protection against accidental contact must be ensured
Locate the ignition electrode and the ionization probe such that the ignition spark
cannot arc over to the ionization probe (risk of electrical overloads) and that it
cannot adversely affect the supervision of ionization
Insulation resistance
– Must be a minimum of 50 Mbetween ionization probe and ground
– Soiled detector holders reduce the insulation resistance, thus supporting
creepage currents
Earth the burner in compliance with the relevant regulations; earthing the boiler
alone does not suffice
12/116
Smart Infrastructure Basic Documentation LME7... CC1P7105enr
1 Safety notes 24.07.2020
1.5 Commissioning notes
Prior to commissioning the system, the following points must be checked:
The correct assignment of the fuel valves to the fuel valve outputs on the LME7
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
During commissioning, 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
For display of the flame on the AZL2, following general conditions apply:
- Display is subject to various component tolerances so that deviations of
10% can occur
- Note that for physical reasons there is no linear relationship between flame
display and detector signal values
The functions of the following available or required input state signals must be checked:
Air pressure
Minimum gas pressure and maximum gas pressure or POC
Safety loop (e.g. safety limit thermostat)
Duties of the expert when making the approval tests
Action Check / response
a) Burner startup with flame detector disconnected Non-alterable 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
Non-alterable lockout during the prepurge time
c) Simulation of loss of flame during operation. For
that, disconnect the flame detector in the operating
position and maintain that state
Non-volatile lockout or restart depending on the
configuration of the LME7
d) Check the plant response time with loss of flame
during operation, which involves manually
disconnecting the fuel valves from the power and
checking the time from this moment to the time
required by the LME7 to turn off power to the fuel
valve
Turning off power to the fuel valves by the LME7 within
the period of time permitted for the respective plant
Further checks may be required, depending on the field of use and the relevant
standards.
After installation and commissioning of a plant, the parameterized values and settings
must be documented by the person / heating engineer responsible for the plant. This
data can be printed out with the help of the ACS410, for example, or else must be
written down. This document must be kept in a safe place and checked by an expert.
Warning!
On the OEM access level of the LME7, it is possible to make parameter settings
that differ from application standards. When setting the parameters, it must be
made certain that the application will run safely in accordance with legal
requirements. If not observed, there is a risk that safety functions will be
impaired.
13/116
Smart Infrastructure Basic Documentation LME7... CC1P7105enr
1 Safety notes 24.07.2020
1.6 Standards and certificates
Applied directives:
Low-voltage directive 2014/35/EC
Directive for pressure devices 2014/68/EC
Gas Appliances Regulation (EU) 2016/426
Electromagnetic compatibility EMC (immunity) *) 2014/30/EC
*) The compliance with EMC emission requirements must be checked after the burner control 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
DIN EN 13611
Automatic electrical controls for household and similar use
Part 2-5:
Special requirements on automatic electric burner control and
monitoring systems
DIN EN 60730-2-5
Safety and control devices for gas burners and gas
burning appliances - Valve proving systems for automatic
shut-off valves
DIN EN 1643
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 LME7 and the PME7 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
Only AC 120 V versions
14/116
Smart Infrastructure Basic Documentation LME7... CC1P7105enr
1 Safety notes 24.07.2020
1.7 Lifetime
The LME7 has a designed lifetime* of 250,000 burner startup cycles which, under
normal operating conditions in heating mode, corresponds to approx. 10 years of
service (starting from the date of manufacture on the unit type plate). 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 use of the LME7 according to the manufacturer’s data
sheet and the basic documentation. After reaching the designed lifetime in terms of the
number of burner startup cycles, or after the corresponding usage time, the LME7 must
be replaced by authorized personnel.
* The designed lifetime is not the warranty time specified in the Terms of Delivery
1.8 Disposal notes
The unit contains electrical and electronic components and must not be disposed of
together with domestic waste. Local and currently valid legislation must be observed.
15/116
Smart Infrastructure Basic Documentation LME7... CC1P7105enr
1 Safety notes 24.07.2020
1.9 Typographical conventions
1.9.1 Safety notes
This Basic Documentation contains instructions which must be observed to ensure your
own personal safety and to prevent damage to equipment and property. The
instructions and notes are highlighted by warning triangles or a hand symbol and are
presented as follows, depending on the hazard level:
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.
1.9.2 Qualified personnel
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.
1.9.3 Correct use
Note the following:
The device may only be used on the applications described in the technical
documentation and only in connection with devices or components from other suppliers
that have been approved or recommended by Siemens.
The product can only function correctly and safely if shipped, stored, set up and
installed correctly, and operated and maintained as specified.
16/116
Smart Infrastructure Basic Documentation LME7... CC1P7105enr
2 System makeup / function description 24.07.2020
2 System makeup / function description
The LME7 is a microprocessor-based burner control with matching system components
for controlling and supervision of forced draft burners of medium to large capacity.
LME7 are used for the startup and supervision of 1- or 2-stage forced draft burners in
intermittent operation. The flame is supervised with an ionization probe, optionally with
flame detector QRA2, QRA4 or QRA10.
Applications in accordance with EN 267: Gas burners for liquid fuels
Applications in accordance with EN 676: Automatic forced draft burners for
gaseous fuels
Applications in accordance with EN 746-2: Industrial thermoprocessing equipment -
Part 2: Safety requirements for combustion and fuel handling systems
Type-tested and approved in accordance with DIN EN 298
The following items are integrated into the LME7:
Burner control
BCI for connection a display or PC
Only LME72 / LME73: Control for one actuator
Lockout reset button (info button)
3 multicolor signal lamp LED for operations and fault notifications
Optional: Analog inputs for load controller DC 0...10 V, DC 0/4...20 mA, 0...135 Ω
3 x 7-segment display for service, fault and operating state information
Interface for PME7
Figure 2: Example: Modulating gas burner
The diagram shows the maximum functionality of the LME7. The actual functions are to
be determined based on the respective execution or configuration.
17/116
Smart Infrastructure Basic Documentation LME7... CC1P7105enr
2 System makeup / function description 24.07.2020
The LME7 system components (AZL2) are connected directly to the LME7 via BCI. All
safety-related digital inputs and outputs of the system are supervised by a contact
feedback network. For intermittent operation, the ionization probe and the QRA2, QRA4
or QRA10 (optional) can be used in connection with the LME7. The LME7 is operated
and parameterized via the AZL2 or ACS410. The AZL2 features an LCD and menu-
driven operation, offering straightforward operation and targeted diagnostics. When
making diagnostics, the display shows operating states as well as the type and time of
errors. The various parameterization levels of the burner/boiler manufacturer and
heating engineer are password-protected against unauthorized access. Simple settings
that the plant operator can make on site do not require a password.
Multicolor indication for operating state and fault status messages via 3-color LED
Diagnostics of cause of fault via blink code
Extensive service, fault and operating state information via built-in 3 x 7 segment
display
Extensive service, fault and operating state information via BCI and AZL2
2.1 Features
- Undervoltage detection
- Electrical remote reset facility
- Accurate control times thanks to digital signal handling
- Multicolor indication of fault status and operating state messages
- Air pressure supervision with function check of air pressure switch during start and
operation
- Restart limitation
- Controlled intermittent operation after max. 24 hours of continuous operation (can
be parameterized via parameter 239) (depending on the PME7)
- BCI
- Unit parameter adjustable either via the AZL2 or ACS410
- Plug-in space for PME7
Only LME71.../LME73...:
- Indication of program sequence
The following items are integrated into the LME7:
Burner control
BC interface for connecting an AZL2 or PC
Lockout reset button (info button)
3 multi color signal lamp LED for operations and fault notifications
Optional: Analog inputs for load controller DC 0...10 V, DC 0/4...20 mA, 0...135 Ω
Interface for PME7
Only LME71.../LME73...:
Optional: 3 x 7 segment display for fault and state information's and parameter
display
Control for one actuator
Indication and
diagnostics
18/116
Smart Infrastructure Basic Documentation LME7... CC1P7105enr
3 Type summary 24.07.2020
3 Type summary
3.1 Burner controls
Parameterized burner control for the supervision of multistage or modulating oil/gas
forced draft burners and atmospheric burners of medium to higher capacity, in
intermittent operation. With controlled air damper control.
Article no.
BPZ:LME71.000A1
BPZ:LME71.000A2
S55333-B205-A100
BPZ:LME72.000A2 *)
BPZ:LME73.000A1
BPZ:LME73.000A2
Type
LME71.000A1
LME71.000A2
LME71.901A2
LME72.000A2 *)
LME73.000A1
LME73.000A2
Mains voltage AC 120 V ●--- --- --- ●---
Mains voltage AC 230 V --- ●●●--- ●
Gas pressure switch-min / POC ●●●●●●
Pressure switch valve proving ●●●●●●
Air pressure switch ●●●●●●
Ionization probe ●●●●●●
QRA2 / QRA4 / QRA10 ●●●--- ●●
QRB1 / QRB3 / QRB4 --- --- --- --- ●●
QRC --- --- --- --- --- ●
Load controller analog input signal (0...10 V, 4...20 mA, 0...135 ) ●●●--- ●●
Load controller input 3-position step input / 2-stage ●●●●●●
Output actuator control --- --- --- ●●●
Input feedback for actuator with potentiometer 0...1 k--- --- --- --- ●●
Output PWM control ●●●●●●
Onboard LED 7-segment display ●●●--- ●●
BC interface for AZL2 ●●●●●●
*) On request
19/116
Smart Infrastructure Basic Documentation LME7... CC1P7105enr
3 Type summary 24.07.2020
3.2 Program module
3.2.1 PME7 with mains voltage AC 120 V
PME7 for LME7, with program sequences for oil burners or gas burners.
Example:
Article no.
BPZ:PME71.111A1
BPZ:PME71.112A1
BPZ:PME71.401A1
BPZ:PME71.402A1
BPZ:PME71.901A1
Type
PME71.111A1
PME71.112A1
PME71.401A1
PME71.402A1
PME71.901A1
Mains voltage AC 120 V ●●●●●
For use with LME71.000A1 ●●●●●
For use with LME72.000A1 --- --- --- --- ---
For use with LME73.000A1 --- --- --- --- ---
Gas program forced draft burner ●--- ●●●
Gas program atmospheric burner --- ●--- --- ---
1-stage or 1-stage modulating ●●●●●
2-stage or 1-stage modulating --- --- ●●●
Pilot burner simultaneously / alternately ●●--- ●---
Modulating via actuator (pneumatic or mechanical fuel-air ratio control) --- --- --- --- ---
Modulating via PWM fan (pneumatic fuel-air ratio control) --- --- --- --- ●
Fan speed control / control via analog signal / 3-position step signal --- --- --- --- ●
Actuator control via analog signal or 3-position step signal for actuator with ASZ --- --- --- --- ---
3-position signal for actuator without ASZ --- --- --- --- ---
Control sequence programmable time ●●●●●
POC ●●●●●
Valve proving --- --- --- --- ●
Input valve proving ON/Off --- --- --- --- ---
20/116
Smart Infrastructure Basic Documentation LME7... CC1P7105enr
3 Type summary 24.07.2020
Article no.
S55333-B317-A100
BPZ:PME73.810A1
BPZ:PME73.811A1
BPZ:PME73.812A1
BPZ:PME73.820A1
BPZ:PME73.830A1
BPZ:PME73.831A1
BPZ:PME73.840A1
Type
PME73.231A1
PME73.810A1
PME73.811A1
PME73.812A1
PME73.820A1
PME73.830A1
PME73.831A1
PME73.840A1
Mains voltage AC 120 V ●●●●●●●●
For use with LME71.000A1 --- --- --- --- --- --- --- ---
For use with LME72.000A1 --- --- --- --- --- --- --- ---
For use with LME73.000A1 ●●●●●●●●
Forced draft burner oil program ●--- --- --- --- --- --- ---
Gas program forced draft burner --- ●●●●●●●
Gas program atmospheric burner --- --- --- --- --- --- --- ---
1-stage or 1-stage modulating ●●●●●●●●
2-stage or 1-stage modulating ●●--- --- ●●●●
Pilot burner simultaneously / alternately ●--- ●●--- ●●●
Modulating via actuator (pneumatic or mechanical fuel-air ratio control) ●●●●●●●●
Modulating via PWM fan (pneumatic fuel-air ratio control) --- --- --- --- --- --- --- ---
Fan speed control / control via analog signal / 3-position step signal --- --- --- --- --- --- --- ---
Actuator control via analog signal or 3-position step signal for actuator
with ASZ
●●●●--- ●●---
3-position signal for actuator without ASZ ●--- --- --- ●--- ●●
Control sequence programmable time ●●●●●●●●
POC ●●●●●●--- ●
Valve proving --- ●●--- ●●●●
Input valve proving ON/Off --- --- --- --- --- --- ●---
This manual suits for next models
14
Table of contents
Other Siemens Safety Equipment manuals
Siemens
Siemens LFS1 Series User manual
Siemens
Siemens FDM243H User manual
Siemens
Siemens SIRIUS 3RK3 Technical Document
Siemens
Siemens Cerberus PACE Compact User manual
Siemens
Siemens SIRIUS 8WD42 User manual
Siemens
Siemens FS-MSM Assembly instructions
Siemens
Siemens SIRIUS 3TK2821 User manual
Siemens
Siemens 3RB30 Installation and operation manual
Siemens
Siemens FDM1101-Rx User manual
Siemens
Siemens SIRIUS 3SB3801-2EA30 Series User manual
