Siemens LME7 Series Operator's manual

Software version 01.01
CC1P7105en
13.10.2009
Building Technologies
HVAC Products
LME7…
Burner control
Basic Documentation
The LME7… and this Basic Documentation are intended for use by OEMs which
integrate the LME7... in their products.

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Supplementary documentation
Product Range Overview LME…................................................................................ Q7101

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Contents
1Safety notes...........................................................................................................9
1.1 Warning notes .......................................................................................................9
1.2 Mounting notes................................................................................................... 10
1.3 Installation notes ................................................................................................ 11
1.4 Electrical connection of flame detectors........................................................... 12
1.5 Commissioning notes ........................................................................................ 13
1.6 Standards and certificates................................................................................. 14
1.7 Life cycle............................................................................................................. 14
1.8 Disposal notes.................................................................................................... 14
2System makeup / function description.............................................................. 15
2.1 Features.............................................................................................................. 16
3Type summary.................................................................................................... 17
3.1 Burner controls ................................................................................................... 17
3.2 Program module................................................................................................. 18
4Technical Data ................................................................................................... 19
4.1 Basic unit LME7... .............................................................................................. 19
4.2 Terminal rating «Inputs».................................................................................... 19
4.3 Terminal rating «Outputs»................................................................................. 20
4.4 Cable lengths...................................................................................................... 21
4.5 Actuators............................................................................................................. 21
4.6 Cross-sectional areas ........................................................................................ 21
4.7 Signal cable AGV50........................................................................................... 22
4.7.1 AZL2... →BCI .................................................................................................... 22
4.8 Dummy plug for RJ11........................................................................................ 22
4.9 Environmental conditions .................................................................................. 23
4.10 Flame supervision with ionization probe .......................................................... 24
4.10.1 Measuring circuit for detector current measurement....................................... 24
Legend 24
4.11 Flame supervision with UV flame detector QRA2... / QRA4.U /
QRA10... ............................................................................................................. 25
4.11.1 Measuring circuit for detector current measurement....................................... 25
5Dimensions......................................................................................................... 26
6Function .............................................................................................................. 27
6.1 Preconditions for burner startup........................................................................ 27
6.2 Undervoltage ...................................................................................................... 27
6.3 Controlled intermittent operation....................................................................... 27
6.4 Control sequence in the event of fault.............................................................. 28

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6.5 Resetting the burner control.............................................................................. 28
6.6 Limitation of repetitions (can be parameterized) (depending on
parameter P240) ................................................................................................ 28
7Operation, indication, diagnostics..................................................................... 29
7.1 Operation ............................................................................................................ 29
7.2 Operational state indication............................................................................... 29
7.3 Diagnostics of the cause of fault....................................................................... 30
8Inputs / Outputs .................................................................................................. 32
9PME71.401......................................................................................................... 33
9.1 Program sequence PME71.401........................................................................ 33
9.2 Connection diagrams fuel train applications (examples) ................................ 34
9.2.1 Gas direct ignition (G), 1-stage ......................................................................... 34
9.2.2 Gas direct ignition (G), 2-stage ......................................................................... 34
9.3 Time table and settings for program sequence PME71.401... ....................... 35
9.4 LME71.000..: Inputs and outputs / internal connection diagram .................... 36
9.5 Parameter list PME71.401A... (AZL2...)........................................................... 37
10 PME71.402......................................................................................................... 39
10.1 Program sequence PME71.402........................................................................ 39
10.2 Connection diagrams fuel train applications (examples) ................................ 40
10.2.1 Gas direct ignition (G), 1-stage ......................................................................... 40
10.2.2 Gas pilot ignition 1 (Gp1/1), 1-stage................................................................. 40
10.3 Time table and settings for program sequence PME71.402... ....................... 41
10.4 LME71.000..: Inputs and outputs / internal connection diagram .................... 42
10.5 Parameter list PME71.402A... (AZL2...)........................................................... 43
11 PME72.521......................................................................................................... 46
11.1 Program sequence PME72.521........................................................................ 46
11.2 Connection diagrams fuel train applications (example) .................................. 47
11.2.1 Gas direct ignition (G), 1-stage ......................................................................... 47
11.2.2 Gas direct ignition 1 (Gp1/1), 2-stage .............................................................. 47
11.3 Connection diagram for LME72.000... with actuator SQM4... (example
1) ......................................................................................................................... 48
11.4 Time table and settings for program sequence PME72.521... ....................... 49
11.5 LME72.000..: Inputs and outputs / internal connection diagram .................... 50
11.6 Parameter list PME72.521... (AZL2...) ............................................................. 51
12 PME72.541......................................................................................................... 53
12.1 Program sequence PME72.541........................................................................ 53
12.2 Connection diagrams fuel train applications (examples) ................................ 54
12.2.1 Gas direct ignition (G), 1-stage ......................................................................... 54

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12.2.2 Gas pilot ignition 1 (Gp1/1), 1-stage................................................................. 54
12.3 Connection diagram for LME72.000... with actuator SQM4... (example
1) ......................................................................................................................... 55
12.4 Time table and settings for program sequence PME72.541... ....................... 56
12.5 LME72.000..: Inputs and outputs / internal connection diagram .................... 57
12.6 Parameter list PME72.541... (AZL2...) ............................................................. 58
13 PME73.810......................................................................................................... 45
13.1 Program sequence PME73.810........................................................................ 45
13.2 Connection diagrams fuel train applications (examples) ................................ 46
13.2.1 Gas direct ignition (G), 1-stage ......................................................................... 46
13.2.2 Gas direct ignition (G), 2-stage ......................................................................... 46
13.2.3 Gas direct ignition (G), 1-stage, with valve proving......................................... 47
13.2.4 Gas direct ignition (G), 2-stage, with valve proving......................................... 47
13.2.5 Valve proving of gas valves............................................................................... 48
Valve proving with separate pressure switch (P LT) ....................................... 48
Valve proving – calculation of leakage rate ..................................................... 49
13.3 Connection diagram for LME73.000... with actuator SQM4... (example
1) ......................................................................................................................... 50
13.4 Time table and settings for program sequence PME73.810... ....................... 51
13.5 LME73.000...: Inputs and outputs / internal connection diagram ................... 52
13.6 Parameter list PME73.810... (AZL2...) ............................................................. 53
14 PME73.820A2 .................................................................................................... 56
14.1 Program sequence PME73.820A2 ................................................................... 56
14.2 Connection diagrams fuel train applications (examples) ................................ 57
14.2.1 Gas direct ignition (G), 1-stage ......................................................................... 57
14.2.2 Gas direct ignition 1 (G), 2-stage ...................................................................... 57
14.2.3 Gas direct ignition (G), 2-stage, with valve proving......................................... 58
14.2.4 Gas direct ignition 1 (G), 1-stage, with valve proving...................................... 58
14.2.5 Valve proving of gas valves............................................................................... 59
Valve proving with separate pressure switch (P LT) ....................................... 59
Valve proving – calculation of leakage rate ..................................................... 60
14.3 Connection diagram for LME73.000... with actuator SQM4... (example
1) ......................................................................................................................... 61
14.4 Connection diagram for LME73.000... without actuator SQM4...................... 62
14.5 Time tables and settings for program sequence PME73.820... ..................... 62
14.6 LME73.000...: Inputs and outputs / internal connection diagram ................... 63
14.7 Parameter list PME73.820... (AZL2...) ............................................................. 64
15 PME73.830A2 .................................................................................................... 67
15.1 Program sequence PME73.830A2 ................................................................... 67
15.2 Connection diagrams fuel train applications (examples) ................................ 68
15.2.1 Gas direct ignition (G), 1-stage ......................................................................... 68
15.2.2 Gas pilot ignition 1 (Gp1/1), 1-stage................................................................. 68

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15.2.3 Gas pilot ignition 1 (Gp1/2), 1-stage, with valve proving ................................ 69
15.2.4 Gas direct ignition 1 (Gp1/2), 1-stage, with valve proving .............................. 69
15.2.5 Valve proving of gas valves............................................................................... 70
Valve proving with separate pressure switch (P LT) ....................................... 70
Valve proving – calculation of leakage rate ..................................................... 71
15.3 Connection diagram for LME73.000... with actuator SQM4... (example
1) ......................................................................................................................... 72
15.4 Time table and settings for program sequence PME73.830... ....................... 73
15.5 LME73.000...: Inputs and outputs / internal connection diagram ................... 74
15.6 Parameter list PME73.830... (AZL2...) ............................................................. 75
16 PME73.840A2 .................................................................................................... 78
16.1 Program sequence PME73.840A2 ................................................................... 78
16.2 Connection diagrams fuel train applications (examples) ................................ 79
16.2.1 Gas direct ignition (G), 1-stage ......................................................................... 79
16.2.2 Gas pilot ignition 1 (Gp1/1), 1-stage................................................................. 79
16.2.3 Gas pilot ignition 1 (Gp1/2), 1-stage, with valve proving ................................ 80
16.2.4 Gas direct ignition 1 (Gp1/2), 1-stage, with valve proving .............................. 80
16.2.5 Valve proving of gas valves............................................................................... 81
Valve proving with separate pressure switch (P LT) ....................................... 81
Valve proving – calculation of leakage rate ..................................................... 82
16.3 Connection diagram for LME73.000... with actuator SQM4... (example
1) ......................................................................................................................... 83
16.4 Connection diagram for LME73.000... without actuator SQM4...................... 84
16.5 Time table and settings for program sequence PME73.840... ....................... 59
16.6 LME73.000...: Inputs and outputs / internal connection diagram ................... 60
16.7 Parameter list PME73.840... (AZL2...) ............................................................. 61
17 Legend ................................................................................................................ 65
18 Multistage or modulating mode......................................................................... 66
18.1 Relevant parameters.......................................................................................... 66
18.1.1 Connection diagram for feedback potentiometer ASZ12.33........................... 66
18.1.2 Connection diagram for load controller ............................................................ 67
18.2 Actuators............................................................................................................. 67
18.3 Function .............................................................................................................. 67
18.4 Load controller inputs ........................................................................................ 68
18.4.1 3-position step input X5-03................................................................................ 68
18.4.2 Analog input X65................................................................................................ 68
18.4.3 Selection source preset output analog / 3-position step input (P654) ........... 68
18.4.4 Actuator output X2-09........................................................................................ 68
18.4.5 Setting maximum running time of the actuator (P259 / P260 timeout).......... 68
18.5 Multistage / modulating mode via 3-position step input X5-03....................... 69
18.5.1 Maximum possible resolution............................................................................ 69
18.6 Modulating mode via analog input signal X65 ................................................. 69

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18.6.1 Maximum possible resolution............................................................................ 69
18.6.2 Standardization of modulation range................................................................ 69
18.7 Setting the minimum power control step (P123) in modulating mode
via analog input signal X65 ............................................................................... 70
19 Operation via the AZL2….................................................................................. 71
19.1 Description of the unit / display and buttons .................................................... 71
19.2 Meaning of symbols on the display................................................................... 72
19.3 Special functions ................................................................................................ 72
19.3.1 Manual lockout ................................................................................................... 72
19.4 Operation ............................................................................................................ 73
19.4.1 Normal display.................................................................................................... 73
19.4.1.1. Display in standby mode ................................................................................... 73
19.4.1.2. Display during startup / shutdown..................................................................... 73
Display of program phases................................................................................ 73
List of phase display (display depends on program)....................................... 74
19.4.1.3. Display of operating position ............................................................................. 75
19.4.1.4. Fault state messages, display of errors and info ............................................. 76
Display of errors (faults) with lockout................................................................ 76
Reset 76
19.5 Menu-drive operation......................................................................................... 77
19.5.1 Assignment of levels.......................................................................................... 77
19.6 Info level.............................................................................................................. 78
19.6.1 Display of info level............................................................................................ 79
19.6.2 Display of info values ......................................................................................... 79
19.6.2.1. Identification date ............................................................................................... 79
19.6.2.2. Identification number.......................................................................................... 79
19.6.2.3. Identification of burner ....................................................................................... 80
19.6.2.4. Number of startups resettable........................................................................... 81
19.6.2.5. Total number of startups.................................................................................... 82
19.6.2.6. End of info level.................................................................................................. 82
19.7 Service level ....................................................................................................... 83
19.7.1 Display of the service level................................................................................ 83
19.7.2 Display of service values ................................................................................... 84
19.7.2.1. Error history ........................................................................................................ 84
19.7.2.2. Mains voltage ..................................................................................................... 84
19.7.2.3. Intensity of flame ................................................................................................ 84
19.7.2.4. End of service level............................................................................................ 84
19.8 Parameter level .................................................................................................. 85
19.8.1 Entering the password ....................................................................................... 86
19.8.2 Changing the heating engineer's password ..................................................... 88
19.8.3 Changing the OEM's password......................................................................... 89
19.8.4 Backup ................................................................................................................ 90
19.8.5 Restore ............................................................................................................... 92

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19.9 Operating variants of the parameters ............................................................... 94
19.9.1 Parameters without index, with direct display.................................................. 94
19.9.1.1. Example of parameter 225 Gas prepurge time on the parameter level......... 94
19.9.2 Parameters without index, with no direct display............................................. 96
19.9.2.1. Example of parameter 224 Specified time for air pressure signal on the
parameter level................................................................................................... 96
19.9.3 Parameters with index, with or without direct display...................................... 98
19.9.3.1. Example of parameter 701: Error history on the service level........................ 98
20 Error code list with operation via external AZL2... display ............................ 101
21 Operation via internal LED .............................................................................. 102
21.1 Description of display and buttons.................................................................. 102
21.2 Normal display.................................................................................................. 102
21.2.1 Display in standby mode ................................................................................. 102
21.2.2 Display during startup / shutdown................................................................... 103
21.2.2.1. Display of program phases.............................................................................. 103
21.2.2.2. List of phase display ........................................................................................ 103
21.2.3 Display of operating position ........................................................................... 104
21.3 Fault state messages, display of errors.......................................................... 105
21.3.1 Display of errors (faults) with lockout.............................................................. 105
21.3.2 Display of flame current ION or QRA... .......................................................... 105
21.3.3 Display of flame current QRB... or QRC... ..................................................... 106
21.3.4 Display of preset output................................................................................... 107
21.4 Manual adjustment (depends on program module)....................................... 108
21.4.1 Position of actuator in the modulating operation with analog signal ............ 108
21.5 First startup with a new program module or in case of replacement of
program module ............................................................................................... 110
21.6 Manual backup ................................................................................................. 112
21.6.1 Error during backup process........................................................................... 113
21.7 Manual restore ................................................................................................. 114
21.7.1 Error during restore process ........................................................................... 115
21.7.2 Reset................................................................................................................. 115
22 Error code list with operation via internal LED............................................... 116
23 List of figures .................................................................................................... 117

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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!
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!
•All activities (mounting, installation and service work, etc.) must be performed by
qualified staff
•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 plug for not used inputs
and outputs). If not observed, there is a risk of electric shock hazard
•The space where the program module is located is defined as plugging space and
therefore back-off-hand-proof when the program module is not fitted
•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 from safety functions and of electric shock hazard
•If the housing or the area near the operating panel is damaged, the unit must imme-
diately be put out of operation. If not observed, there is a risk of electric shock haz-
ard
•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 elec-
tric 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 from safety functions and of electric shock hazard
•To ensure protection against electric shock hazard, make certain that, prior to swit-
ching 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

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1.2 Mounting notes
•Ensure that the relevant national safety regulations are complied with
60
(42 ) 42
(73,9)
73,9
0,3
Outer contour housin
g
5
5
168,8
108,8
7113z05e/1009
Program module
Operating panel
13
13
13
13
1313
O5
(
3x
)
Figure 1: Mounting – mounting surface
Mounting surface
Installation notes

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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
•The connection diagrams show the burner controls with earthed neutral conductor.
In networks with nonearthed neutral conductor and ionization current supervision,
terminal X10-05/1 must be connected to the earth conductor. It must be made cer-
tain that local regulations are complied with (e.g. protection against electric shock
hazard) since AC 230 V (60 Hz) mains voltage produces peak leakage currents of
2.7 mA
•Make certain that the maximum permissible current rating of the connection termi-
nals is not exceeded
•Do not feed external mains voltage to the control outputs of the unit. When testing
the devices controlled by the burner control (fuel valves, etc.), the LME7… must not
be connected with the units
•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 (cable supplied by Hütter; refer to «Technical data»). When using sig-
nal 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

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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 (refer to «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 can-
not adversely affect the supervision of ionization
•Insulation resistance
– Must be a minimum of 50 MΩbetween ionization probe and ground
– Soiled detector holders reduce the isolation resistance, thus supporting
creepage currents
•Earth the burner in compliance with the relevant regulations; earthing the boiler
alone does not suffice

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1.5 Commissioning notes
•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 temperature limiter (SBT))
Duties of the expert when making the approval tests
Action Check / response
a) Burner startup with disconnected flame detector Lockout at the end of 1st safety time (TSA1)
b) Burner startup with flame detector exposed to ex-
traneous light, e.g. to incandescent light with detec-
tors for visible radiation, quartz-halogen bulb or ci-
garette lighter flame with detectors for UV radiation
Lockout at prepurge time (t1)
c) Simulation of loss of flame during operation. For
that, disconnect the flame detector in the operating
position and maintain that state
Lockout or restart, depending on the burner control’s
configuration
d) Check the plant’s response time with loss of flame
during operation. For that purpose, manually dis-
connect the fuel valves from power and check the
time from this moment the burner control requires
to turn off power to the valve
Turning off power to the fuel valves by the burner con-
trol within the period of time permitted for the respective
time of plant
Further checks may be required, depending on the field of use and the relevant stan-
dards.
After installation and commissioning, the parameterized values and settings must be
documented by the person / heating engineer responsible for the plant. These data
can be printed out with the help of the ACS410 PC software, for example, or must be
written down. The documentation must be checked by the expert and then kept in a sa-
fe place.
Caution!
On the OEM access level of the LME7…, it is possible to make parameter set-
tings that differ from application standards. When setting the parameters, it
must be made certain that the application will run safely in accordance with le-
gal requirements.

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1.6 Standards and certificates
Conformity to EEC directives
- Electromagnetic compatibility EMC (immunity)
- Directives for gas-fired appliances
- Low-voltage directive
2004/108/EC
90/396/EEC
2006/95/EC
ISO 9001: 2000
Cert. 00739
ISO 14001: 2004
Cert. 38233
Identification code to EN 298 chapter 4
•PME71.401..: F M C L J N
•PME71.402...:F B C L J N
•PME72.521..: F M L L X N
•PME72.541..: F B L L X N
•PME73.810..: F M C L J N
•PME73.820..: F M C L J N
•PME73.830..: F B C L J N
•PME73.840..: F B C L J N
1.7 Life cycle
Burner controls LME7… 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 and the table containing the relevant
test documentation as published by the European Association of Component Manufac-
turers (Afecor) (www.afecor.org).
The designed lifetime is based on use of the burner controls according to the manufac-
turer’s Basic Documentation. After reaching the designed lifetime in terms of the number
of burner startup cycles, or the respective time of usage, the burner control is to be re-
placed 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 to-
gether with household waste. Local and currently valid legislation must be observed.

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HVAC Products 2 System makeup / function description 13.10.2009
2 System makeup / function description
The LME7... is a microprocessor-based burner control with matching system compo-
nents for the control and supervision of forced draft burners of medium to high capacity.
LME7… are used for the startup and supervision of 1- or 2-stage gas forced draft burners
in intermittent operation. The flame supervision supervised with ionization probe optional
with UV flame detector QRA2..., QRA4.U or QRA10....
- Burner control to EN 298: 2003
- For gas forced draft burners to EN 267 and EN 676
Integrated in the LME7... basic unit are:
•Burner control
•BCI
•Only LME72... / LME73...: Control for one actuator
•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
•3 x 7 segment display for service, fault and state information’s
•Interface for program module
Figure 2: Example: Modulating gas burner

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HVAC Products 2 System makeup / function description 13.10.2009
The LME7... system components (display and operating unit AZL2...) are connected di-
rectly via BCI to the LME7... basic unit. All safety-related digital inputs and outputs of
the system are monitored by a contact feedback network. For intermittent operation in
connection with the LME7..., the ionization probe and optional the UV flame detector
QRA2..., QRA4.U or QRA10... can be used. The burner control is operated and param-
eterized via the AZL2... display and operating unit or via PC tool. The AZL2... display
and operating unit features an LCD and menu-driven operation, offering straightforward
operation and targeted diagnostics. When making diagnostics, the display shows oper-
ating states, the type of error and the meter reading. Passwords protect the different
parameter levels of the burner / boiler manufacturer and heating engineer against un-
authorized access. Basic settings that the plant operator can make on site require no
password.
•Multicolor indication for operational state and fault state messages via 3-colored
LED
•Diagnostics of the cause of fault via blink code
•Extensive service, fault and state information’s via built-in 3 x 7 segment display
•Extensive service, fault and state information’s 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 state and operational state messages
- Air pressure supervision with function check of air pressure switch during start and
operation (gas)
- Repetition limitation
- Controlled intermittent operation after 24 hours of continuous operation
- BCI
- Indication of program sequence
Indication and
diagnostics

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HVAC Products 3 Type summary 13.10.2009
3 Type summary
3.1 Burner controls
Microprocessor-based burner control for single-fuel burner of medium to large capacity,
one actuator.
Type reference
LME71.000A1 LME71.000A2 LME72.000A2 LME73.000A1 LME73.000A2
Mains voltage AC 110 V x --- --- x ---
Mains voltage AC 230 V --- x x --- x
Pressure switch-min-gas / POC x x x x x
Pressure switch valve proving x x x x x
Air pressure switch x x x x x
Ionization probe x x x x x
QRA2... / QRA4.U / QRA10... x x x x x
Load controller analog input signal (0...10 V, 4...20 mA, 0...135 Ω) x x --- x x
Load controller input 3-position step input / 2-stage x x x x x
Output actuator control --- --- x x x
Input feedback for actuator with potentiometer 0...1 kΩ--- --- --- x x
Output PWM control x x x x x
Internal LED 7 segment display x x --- x x
BCI bus for AZL2... x x x x x

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3.2 Program module
Example:
Type reference
PME71.401A1 PME71.402A1 PME72.521A2 PME72.541A2 PME73.810A2 PME73.820A2 PME73.830A2 PME73.840A2
Mains voltage AC 110 V x x --- --- --- --- --- ---
Mains voltage AC 230 V --- --- x x x x x x
For operation with L ME71.000A... x x --- --- --- --- --- ---
For operation with L ME72.000A... --- --- x x --- --- --- ---
For operation with LME73.000A2 --- --- --- --- x x x x
Gas program forced draft burner x x x x x x x x
Gas program atmospheric burner --- --- --- --- --- --- --- ---
1-stage / 2-stage or 1-stage modulating x x x x x x x x
Pilot burner intermittent / interrupt --- x --- x --- --- x x
Modulating via actuator (pneumatically, mechanical gas air ration
control)
--- --- x x x x x x
Actuator control via analog signal / 3-position step signal for actua-
tor with potentiometer
--- --- --- --- x --- x ---
3-position signal for actuator without potentiometer --- --- x x --- x --- x
Control sequence programmable time x x --- --- x x x x
POC x x x x x x x x
Valve proving --- --- --- --- x x x x

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HVAC Products 4 Technical Data 13.10.2009
4 Technical Data
4.1 Basic unit LME7...
Mains voltage AC 120 V AC 230 V
Mains frequency 50 / 60 Hz ±6 % 50 / 60 Hz ±6 %
External primary fuse (Si) Max. 6,3 A (slow) Max. 6,3 A (slow)
Power consumption <10 W, typical <10 W, typical
Safety class I with parts according to II and III to
DIN EN 60730-1
Degree of protection IP00
Note
The burner or boiler manufacturer must
ensure degree of protection IP40 for
burner controls as per DIN EN 60529
through adequate installation of the
LME7...
Perm. mounting position Optional
Weight Approx. 490 g
4.2 Terminal rating «Inputs»
•Mains voltage: Input current depending on the operating state of the unit
Under voltage
•Safety shutdown from the operating
position takes place should mains
voltage
≤AC 165 V
•Restart is initiated when mains volt-
age exceeds
≥AC 195 V
State inputs, temperature controller, temperature switch, load controller, pressure
switch, air pressure switch, actuator (except safety loop) of the contact feedback net-
work (CFN) are used for system supervision and require mains-related input voltage
•Input safety loop Refer to «Terminal rating outputs»
•Input currents and input voltages
- Ue Max UN +10 % UN +10 %
- Ue Min UN -15 % UN -15 %
- IeMax 1,5 mA peak
(peak value)
1 mA peak
(peak value)
- IeMin 0,8 mA peak
(peak value)
0,5 mA peak
(peak value)
•Contact material recommendation
for external signal sources (air pres-
sure switch, pressure switch-min,
pressure switch-max, etc.)
Gold-plated silver contacts
•Transition / settling behavior / boun-
ce
- Perm. bounce time of contacts
when switching ON / OFF
Max. 50 ms
(after the bounce time, the contact must
stay closed or open)
•UN AC 120 V AC 230 V
•Voltage detection
- ON >AC 60 V >AC 120 V
- OFF <AC 40 V <AC 80 V

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4.3 Terminal rating «Outputs»
Total contact loading:
•Rated voltage AC 120 V
50 / 60 Hz
AC 230 V
50 / 60 Hz
•Unit input current X3-04
(safety loop) from:
- Fan motor contactor
- Ignition transformer
- Fuel valves
Max. 5 A Max. 5 A
Individual contact loading:
Fan motor contactor X2-01/3
•Rated voltage AC 120 V
50 / 60 Hz
AC 230 V
50 / 60 Hz
•Rated current 2 A
(15A for max. 0.5s)
2 A
(15A for max. 0.5s)
•Power factor Cosϕ≥0.4 Cosϕ≥0.4
Alarm output X2-03/3
•Rated voltage AC 120 V
50 / 60 Hz
AC 230 V
50 / 60 Hz
•Rated current 1 A 1 A
•Power factor Cosϕ>0.6 Cosϕ>0.6
Ignition transformer X4-02/3
•Rated voltage AC 120 V
50 / 60 Hz
AC 230 V
50 / 60 Hz
•Rated current 2 A 2 A
•Power factor Cosϕ>0.4 Cosϕ>0.4
Output K2/2 X2-09/7
•Rated voltage AC 120 V
50 / 60 Hz
AC 230 V
50 / 60 Hz
•Rated current 1 A 1 A
•Power factor Cosϕ>0.4 Cosϕ>0.4
Fuel valves / pilot valve (PV) X7-01/3
•Rated voltage AC 120 V
50 / 60 Hz
AC 230 V
50 / 60 Hz
•Rated current 1 A 1 A
•Power factor Cosϕ>0.4 Cosϕ>0.4
Fuel valves 1 (V1) X7-04/4 / fuel valve 2
(V2) X7-02/3
•Rated voltage AC 120 V
50 / 60 Hz
AC 230 V
50 / 60 Hz
•Rated current
- Valve proving inactive
2 A 2 A
- Valve proving active 1 A 1 A
•Power factor Cosϕ>0.4 Cosϕ>0.4
&
Note
When activating the valve proving (e.g. on shutdown), the load on the valve
terminals is restricted. If the load is not reduced, the design life time is about
100,000 burner start cycles!
Safety valve (SV) X6-03/3
•Rated voltage AC 120 V
50 / 60 Hz
AC 230 V
50 / 60 Hz
•Total current 1,5 A 1,5 A
•Power factor Cosϕ>0.6 Cosϕ>0.6