Siemens LMO64 Series User manual

CC1N7138en
18.05.2016
Building Technologies Division
7138
Oil Burner Controls LMO64...
Microcontroller-based oil burner controls for the startup, supervision and control
of forced draft oil burners in intermittent operation. Maximum oil throughput up
to 30 kg/h.
The LMO64... and this Data Sheet are intended for use by OEMs which integrate
the burner controls in their products.
Use, features The LMO64... burner controls are designed for the startup and supervision of 1-stage
forced draft oil burners in intermittent operation. Yellow-burning flames are supervised
with photo resistive detectors QRB..., blue-burning flames with blue-flame detectors
QRC...
Applications in accordance with EN 267: Automatic forced draft burners for liquid
fuels
Type-tested and approved in accordance with DIN EN 298
Undervoltage detection
Electrical remote reset
Bridging contact for oil preheater
Monitoring of time for oil preheater
Accurate and reproducible program sequence through digital signal handling
Controlled intermittent operation after 24 hours of continuous operation
Limitation of the number of repetitions
Multicolor indication of fault and status messages
Postpurge function for clearing the combustion chamber after burner operation
Use
General features
Specific features

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Supplementary documentation
Product type Type of documentation Documentation number
LMO... Environmental declaration E7130
ACS410 Software documentation J7352
OCI400 Data sheet N7614
QRB1... Data sheet N7714
QRC1... Data sheet N7716
Warning notes
To avoid injury to persons, damage to property or the environment, the following
warning notes must be observed!
Do not open, interfere with or modify the unit!
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. If not observed, there will be a risk of
electric shock
Each time work has been carried out (mounting, installation, service work, etc.),
check to ensure that wiring is in an orderly state and make the safety checks as
described in «Commissioning notes». If not observed, the safety functions are no
longer ensured and there will be a risk of electric shock
Press the lockout reset button / operation button of the LMO64 only manually
(applying a force of no more than 10 N), without using any tools or pointed objects.
If not observed, the safety functions are no longer ensured and there will be a risk
of electric shock
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. If not observed, the safety
functions are no longer ensured and there will be a risk of electric shock
Mounting notes Ensure that the relevant national safety regulations are complied with.
Installation notes
Always run the high-voltage ignition cables separately while observing the greatest
possible distances to the unit and to other cables
Install switches, fuses, earthing, etc., in compliance with local regulations
Ensure that the maximum permissible amperages will not be exceeded (refer to
«Technical data»)
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 LMO64... must
never be plugged in
Do not mix up live and neutral conductors
Attention!
To ensure that the LMO64... does not get mixed up with other types of burner
controls, it may only be used in connection with the grey AGK11.6 plug-in base.
In particular, it must be made certain that the line for the control thermostat or
pressurestat «R» is picked up after the limit thermostat and pressure switch
«W» and safety limit thermostat «SB», to be connected to terminal 7 (refer to
«Connection diagram»).

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Electrical connection of the flame detector
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
Note the maximum permissible detector cable lengths (refer to «Technical data»)
Earth the burner in compliance with the relevant regulations; earthing the boiler
alone does not suffice
Commissioning notes
When commissioning the plant or when doing maintenance work, make the following
safety checks:
Safety check Anticipated response
a) Burner startup with flame detector darkened Non-alterable lockout at the end
of the safety time (TSA)
b) Burner startup with flame detector ex-posed to
extraneous light Non-alterable lockout within 40 seconds
c) Burner operation with simulated flame failure;
for that purpose, darken the flame detector
during operation and maintain that status
Repetition followed by the non-
alterable lockout at the end of
safety time (TSA)

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Standards and certificates
Applied directives:
Low-voltage directive 2014/35/EC
Directive for pressure devices 97/23/EC and
2014/68/EC (2016-07-16)
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
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 LMO and the AGK11 comply with the
requirements of EN 60335-2-102.
EAC Conformity mark (Eurasian Conformity mark)
ISO 9001:2008
ISO 14001:2004
OHSAS 18001:2007
China RoHS
Hazardous substances table:
http://www.siemens.com/download?A6V10883536
Service notes
The service adapters can only be used for a short time. They may only be used in
supervised operation by qualified staff.
Life cycle
Burner controls 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 burner controls according to the
manufacturer’s Data Sheet. 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
replaced by authorized personnel.
* The designed lifetime is not the warranty time specified in the Terms of Delivery

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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.
Mechanical design
The housing is made of impact-proof, heat-resistant and flame-retarding plastic.
It is of plug-in design and engages audibly in the base.
Burner controls type LMO64... and AGK11.6 plug-in bases are silver-grey (RAL7001).
The housing accommodates the
- microcontroller, which controls the program sequence, and the print relays for load
control,
- electronic flame signal amplifier,
- lockout reset button with its integrated multicolor signal lamp for status and fault
messages and the socket for connecting the OCI400 interface
- Multicolor display of status and fault messages
- Transmission of status and fault messages as well as detailed service information
by additional OCI400 interface and PC software ACS410
Display and diagnostics

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Type summary
Article no. Type reference Mains
voltage Fuel valve stages Burner capacity ¹) Remote reset Times
tw
max. t1 / t1´ min. TSA max. t3 min. t3n max. t8 max.
BPZ:LMO64.300C2 LMO64.300C2 AC 230 V 1 <30 kg/h 2.5 s 15 / 16 s 10 s 15 s 10 s 20 s
BPZ:LMO64.301C2 LMO64.301C2 AC 230 V 1 <30 kg/h 2.5 s 15 / 16 s 10 s 15 s 10 s 90 s
BPZ:LMO64.302C2 * LMO64.302C2 * AC 230 V 1 <30 kg/h 2.5 s 15 / 16 s 10 s 15 s 3 s 20 s
* On request only!
Legend
TSA Ignition safety time
tw Waiting time
t1 Prepurge time
t1´ Purge time
t3 Preignition time
t3n Postignition time
t8 Postpurge time
¹) Bridging contact for oil preheater

CC1N7138en
18.05.2016
Building Technologies Division
Test adapter (to be ordered separately)
Test adapter KF8833
For checking the functions of burner controls on the
burner
With signal lamps for program indication
With one pair of jacks for measuring the flame detector
current
Test adapter KF8840
For checking the functions of burner controls on the
burner
With signal lamps for program indication
With on / off switch for simulating the flame signal
With holes for checking the control voltages at the tabs of
the burner control
With one pair of jacks for measuring the flame detector’s
resistance
Test adapter KF8885
For checking the functions of burner controls on the
burner
With switch for manual startup of the burner
With switch for simulating the oil preheater’s release
contact
With 2 pairs of jacks for measuring the flame detector
current
See operating instructions B7986

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Accessories (to be ordered separately)
Connection accessories
for small burner controls Plug-in base AGK11.6
Plug-in base grey for connecting the LMO to burner plant
Refer to Data Sheet N7201
Cable holders AGK66…
For plug-in base AGK11.
Refer to Data Sheet N7201
Cable holders AGK65…
For plug-in base AGK11.
Refer to Data Sheet N7201
Flame detectors
Photo resistive detectors QRB1...
Refer to Data Sheet N7714
Blue-flame detectors QRC1...
Refer to Data Sheet N7716
Frontal illumination
Lateral illumination
Service-Tools Optical Interface OCI400
Optical interface between burner control and PC
Facilitates viewing and recording setting parameters on
site in connection with the ACS410 PC software
Refer to Data Sheet N7614
PC software ACS410
PC software for setting the parameters and for visualizing the
burner controls
Refer to Software Documentation J7352

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Technical data Mains voltage
A
C 230 V +10 % / -15 %
Mains frequency 50...60 Hz ±6 %
External primary fuse (Si) 6.3 A (slow)
Power consumption 12 VA
Perm. mounting position Optional
Weight
A
pprox. 200 g
Safety class I (burner control with plug-in base)
Degree of protection IP40 (to be ensured through mounting)
Perm. cable lengths
- from terminal 7 to «R» Max. 3 m at a line capacitance of 100 pF/m Max. 20 m at 100 pF/m
Detector cable laid separately Max. 10 m
Remote reset laid separately Max. 20 m
Perm. amperage at cos 0.6 LMO64...
Terminal 1 Max. 5 A
Terminals 3 and 8 Max. 3 A
Terminals 4, 5, 6 and 10 Max. 1 A
Storage DIN EN 60721-3-1
Climatic conditions Class 1K3
Mechanical conditions Class 1M2
Temperature range -20...+60 °C
Humidity <95 % r.h.
Transport DIN EN 60721-3-2
Climatic conditions Class 2K2
Mechanical conditions Class 2M2
Temperature range -20...+60 °C
Humidity <95 % r.h.
Operation DIN EN 60721-3-3
Climatic conditions Class 3K3
Mechanical conditions Class 3M3
Temperature range -5...+60 °C
Humidity <95 % r.h.
Installation altitude Max. 2,000 m above sea level
Attention!
Condensation, formation of ice and ingress of water are not permitted!
If not observed, the safety functions are no longer ensured and there will be a
risk of electric shock.
General unit data
Environmental
conditions

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Technical data (cont´d)
Required detector current
(with flame) Perm. detector current (without flame) Possible detector current with flame (typically)
QRB... ¹) Min. 45 µA Max. 5.5 µA Max. 100 µA
QRC... ¹) Min. 70 µA Max. 5.5 µA Max. 100 µA
¹) The values given in the table above only apply under the following conditions:
- Mains voltage depending on execution AC 230 V
- Ambient temperature 23 °C
Detector current in operation:
- Flame signal instable
- Green signal lamp (LED) flashing
Detector current in operation:
- Flame signal stable
- Green signal lamp (LED) steady on
QRB... ¹) <45 µA >45 µA
QRC... ¹) <45 µA >45 µA
¹) The values given in the table above only apply under the following conditions:
- Mains voltage depending on execution AC 230 V
- Ambient temperature 23 °C
QRB... QRC...
12
11 LMO...
bl
µA DC
+
QRB...
7138v01/0602
sw 12
11 LMO... 1
swbl br
µA DC
+
QRC1...
7138v02/0602
Legend
µA DC DC microammeter
with an internal
resistance of
Ri = max. 5 k
bl Blue
sw Black
br Brown
As an alternative to detector current measurement, the OCI400 interface with ACS410
PC software can be used. In that case, connection of the DC microammeter is not
required.
Flame supervision with
QRB... and QRC...
Green signal lamp
(LED) for indication of
operating state
Measurement circuit for
detector current

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Function
Burner control is reset
Reset button
«EK1» or «EK2» not used
All contacts in the line are closed, heat demand
No undervoltage
Flame detector is darkened and there is no extraneous light
Safety shutdown from the operating position takes place should mains voltage drop
below about AC 165 V (with UN= AC 230 V)
Restart is initiated when mains voltage exceeds about AC 175 V
(with UN= AC 230 V)
If the oil preheater’s release contact does not close within 10 minutes, a non-alterable
lockout takes place.
After 24 hours of continuous operation at the latest, the burner control will initiate
automatic safety shutdown followed by a restart.
If a non-alterable lockout occurs, the outputs for the fuel valves, the burner motor and the
ignition equipment are always immediately deactivated (<1 second).
In the event of a non-alterable lockout, the LMO remains locked and the red signal lamp
(LED) lights up permanently.
The burner control can immediately be reset.
This status is also maintained in the case of a mains failure.
Cause Response
Mains failure Restart
Voltage below undervoltage threshold Safety shutdown, followed by restart
Extraneous light during «t1», 5 s before
«BV1» release Non-alterable lockout at the end of the prepurge time (t1)
Extraneous light during «tw» Start prevention, a non-alterable lockout
occurs after a maximum of 40 seconds
No flame at the end of «TSA» Non-alterable lockout at the end of the
safety time (TSA), blink code 2, see Control
sequence
Flame is lost during operation Maximum of 3 repetitions, then a non-
alterable lockout occurs
Oil preheater’s release contact does not
close within 10 min. Non-alterable lockout
After a non-alterable lockout, a reset can be carried out immediately.
To do this, press the lockout reset button for about 1 second (<3 seconds). The LMO...
can only be reset when all contacts in the line are closed and when there is no
undervoltage.
If the flame is lost during the safety time (TSA), the burner will be reignited before the
end of the safety time (TSA) at the latest. This means that several ignition attempts can
be made within the safety time (TSA), see Program sequence.
If the flame is lost during operation, a maximum of 3 repetitions can be carried out.
Each time the flame is lost during operation, a non-alterable lockout will be initiated.
The repetition count is restarted each time controlled switching on by «R» takes place.
Postpurging is only possible when the oil preheater contact is closed or when the wire
link between terminals 3 and 8 is fitted.
A demand for heat via «R» during postpurge time «t8», implicates an interruption of
postpurging, followed by new start.
Preconditions for
startup
Undervoltage
Time supervision
oil preheater
Controlled intermittent
operation
Control sequence in
the event of fault
Resetting the
burner control
Ignition program with
LMO 64.302...
Limitation of repetitions
Postpurging

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Operation, display, diagnostics
EK
7138z04/0602
Lockout reset button «EK» is the key operating element for resetting
the burner control and for activating / deactivating the diagnostic
functions.
LED
7138z01e/0602
Red
Yellow
Green
The multicolor signal lamp (LED) in the lockout reset button is the key
indicating element for visual diagnostics and interface diagnostics.
Both elements (EK / LED) are located under the transparent cover of the lockout reset
button.
There are 2 diagnostic choices available:
1. Visual diagnostics: Operating state indication or diagnostics of the cause of fault
2. Interface diagnostics: With the help of the OCI400 interface and PC software
ACS410 or flue gas analyzers of different makes.
Visual diagnostics:
In normal operation, the different operating states are indicated in the form of color
codes according to the color code table.
During startup, indication of the operating state takes place according to the following
table:
Color code table for multicolor «LED» signal lamp
State Color code Color
Waiting time «tw», standby on
continuous phase, waiting status ........................................ Off
Oil preheater heats ........................................ Yellow
Ignition phase, ignition controlled Flashing yellow
Operation, flame o.k. ......................................... Green
Operation, flame not o.k. (when
detector current drops below the
recommended level for reliable
operation)
Flashing green
Extraneous light on burner startup Green-red
Undervoltage Yellow-red
Fault, alarm ......................................... Red
Output of fault code (refer to «Error
code table») Flashing red
Interface diagnostics Red flicker light
...... Steady on Red
Off Yellow
Green
Operation
Operating state
indication
Legend

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Operation, display, diagnostics (cont´d)
After lockout, the red fault signal lamp remains steady on. In that condition, the visual
diagnostics of the cause of fault according to the error code table can be activated by
pressing the lockout reset button for more than 3 seconds. Pressing the reset button
again for at least 3 seconds, the interface diagnostics will be activated. If, by accident,
interface diagnostics has been activated, in which case the slightly red light of the
signal lamp flickers, it can be deactivated by pressing again the lockout reset button for
at least 3 seconds. The moment of switching over is indicated by a yellow light pulse.
The following sequence activates the diagnostics of the cause of fault:
EK
> 3 s
Flashing
xxxxxxxx
xxxxxxxx
xxxxxxxx
xxxxxxxx
xxxxxxxx
xxxxxxxx
Error code table
EK
> 3 s
Interface diagnostics
PC / analyzer
OCI400
EK
< 3 s
7138z03e/0904
Reset
On
Visual diagnostics
Fault position Fault position Fault position
Error code table of multicolor signal lamp
Blink code «red» of
signal lamp Alarm at terminal 10 Possible cause
2 blinks On No establishment of flame at the end of «TSA»
- Faulty or soiled fuel valves
- Faulty or soiled flame detector
- Poor adjustment of burner, no fuel
- Faulty ignition equipment
3 blinks On Free
4 blinks On Extraneous light on burner startup
5 blinks On Free
6 blinks On Free
7 blinks On Too many losses of flame during operation
(limitation of the number of repetitions)
- Faulty or soiled fuel valves
- Faulty or soiled flame detector
- Poor adjustment of burner
8 blinks On Timer supervision oil preheater
9 blinks On Free
10 blinks Off Wiring fault or internal fault, output contacts, faults
that cannot be detected, such as simultaneous
faults, other faults
During the time the cause of fault is diagnosed, the control outputs are deactivated
Burner remains shut down
Fault status signal (Alarm) at terminal 10, according to the error code table
The diagnostics of the cause of fault is quit and the burner switched on again by
resetting the burner control. Press lockout reset button for about 1 second
(<3 seconds).
Diagnostics of
cause of fault

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Connection diagram and internal diagram
126745
10 11 12
W
SB
R
L
NMZBV1
AL
Si
83
OW
OH
N
83QRB
QRC
br
bl sw
1
7138a01e/0908
9
EK2
EK1 µC control
K1 K2
K3
FSV
µC2
LED
kbr
µC1
Control sequence
R
OH
OW
M
Z
BV1
FS
A´
A
BC
D
7
8
3
3
6
4
11
12
t1´
t3
t3n
TSA
tw
Z
FS
6
11
12
7138d01fr/0516
Only with LMO64.302: reignition t3n t3n
t1
1
W
SB
E
t8

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Legend AL Alarm device
BV... Fuel valve
EK1 Lockout reset button
EK2 Remote lockout reset button
FS Flame signal
FSV Flame signal amplifier
K... Contacts of control relay
kbr Cable link (required only when oil preheater is not used)
LED 3-color signal lamps
M Burner motor
OW Release contact of oil preheater
OH Oil preheater
QRB Photo resistive detector
QRC Blue-flame detector
bl = blue, br = brown, sw = black
R Control thermostat or pressurestat
SB Safety limit thermostat
Si External primary fuse
W Limit thermostat or pressure switch
Z Ignition transformer
TSA Ignition safety time
tw Waiting time
t1 Prepurge time
t1´ Purge time
t3 Preignition time
t3n Postignition time
t8 Postpurge time
A´ Beginning of startup sequence with burners using «OH»
A Beginning of startup sequence with burners using no «OH»
B Time of flame establishment
C Operating position
D Controlled shutdown by «R»
E End of startup sequence
Control signals
Required input signals
Permissible input signals
µC1 Mikrocontroller 1
µC2 Mikrocontroller 2

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Dimensions Dimensions in mm
5,2
62,5
88
91
41,6
47,2
62,5
7138m05/1204
22
9
LMO64...
2016 Siemens AG Building Technologies Division, Berliner Ring 23, D-76437 Rastatt
Subject to change!
Plu
g
-in base AGK11.6