Siemens LMO14 Series User manual

CC1N7130en
22.08.2013
Building Technologies Division
Infrastructure & Cities Sector
7
130
Oil Burner Controls
LMO14...
LMO24...
LMO44...
Microcontroller-based oil burner controls for the startup, supervision and control
of forced draft oil burners in intermittent operation. Standard versions with an oil
throughput up to 30 kg / h, special versions above 30 kg / h.
The LMO14..., LMO24..., LMO44... and this Data Sheet are intended for use by
OEMs which integrate the burner controls in their products.
Use, features
The LMO... are designed for the startup and supervision of 1- or 2-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...
In terms of housing dimensions, electrical connections and flame detectors, the LMO...
are identical with the LOA... oil burner controls.
-Oil burners with fans to EN 267
-Burner controls for use with atomization oil burners of monoblock design to
DIN EN 230:2005-10
-LMO44... for use with stationary direct-fired air heaters
-Undervoltage detection
-Electrical remote reset
-Bridging contact for oil preheater
-Monitoring of time for oil preheater
-Accurate and reproducible control sequence thanks to digital signal handling
-Controlled intermittent operation after 24 hours of continuous operation
-Limitation of the number of repetitions
-Multicolor indication of fault status and operational status messages
Use
General features
Distribuitor: FLAME POWER SRL 021-3121727 ; 0744-340566 [email protected] ; www.arzatoare.ro

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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!
xAll activities (mounting, installation and service work, etc.) must be performed by
qualified staff
xBefore 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
xEnsure protection against electric shock hazard by providing adequate protection
for the burner control’s connection terminals. If this is not observed, there is a risk
of electric shock
xEach 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, there is a risk of
impairment of safety functions and of electric shock hazard
xPress the lockout reset button / operation button or the AGK20… lockout reset
button extension only manually (applying a force of no more than 10 N) without
using any tools or pointed objects. If not observed, there is a risk of impairment
of safety functions and of electric shock hazard
xFall 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, there is a
risk of impairment of safety functions and of electric shock hazard
xWhen replacing LOA26... or LOA36..., any ARK21... remote lockout reset module
or similar modules fitted in the burner or boiler must be removed. If not observed,
there is a risk of impairment of safety functions
Mounting notes
xEnsure that the relevant national safety regulations are complied with
Installation notes
xAlways run the high-voltage ignition cables separately while observing the greatest
possible distances to the unit and to other cables
xInstall switches, fuses, earthing, etc., in compliance with local regulations
xEnsure that the maximum permissible amperages will not be exceeded (refer to
«Technical data»)
xDo not feed external mains voltage to the control outputs of the unit. When testing
the components controlled by the burner control (fuel valves, etc.), the LMO... may
never be plugged in
xDo not mix up live and neutral conductors
Electrical connection of the flame detectors
It is important to achieve practically disturbance- and loss-free signal transmission:
xNever run the detector cable together with other cables
– Line capacitance reduces the magnitude of the flame signal
– Use a separate cable
xObserve the maximum permissible lengths of the detector cables (refer to
«Technical data»)
ARK21...

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Commissioning notes
xWhen commissioning the plant or when doing maintenance work, make the
following safety checks:
Safety check
Anticipated response
a) Burner startup with flame detector
darkened
Lockout at the end of safety time
(TSA)
b) Burner startup with flame detector
exposed to extraneous light
Lockout after no more than 40
seconds
c) Burner operation with simulated loss of
flame; for that purpose, darken the flame
detector during operation and maintain
that state
Repetition followed by lockout at
the end of safety time (TSA)
Standards and certificates
Conformity to EEC directives
- Electromagnetic compatibility EMC (immunity)
- Low-voltage directive
2004/108/EC
2006/95/EC
ISO 9001: 2008
Cert. 00739
ISO 14001: 2004
Cert. 38233
Type
Identification code to EN 230:
LMO14...
F M L L X N
LMO24...
F M L L X N
LMO44...
F M L L X N to WLE
Service notes
xUse the KF8885 / KF8833 / KF8840 service adapters for short periods of time only
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 in the standard EN 230.
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
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.

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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 LMO... are
designed in black plastic.
The housing accommodates the
-microcontroller for the control sequence and the print relays for load control
-electronic flame signal amplifier
-lockout reset button with its integrated multicolor signal lamp (LED) for operational
status and fault status messages and the socket for connecting the OCI400
interface or the AGK20... lockout reset button extension
-Multicolor indication of operational status and fault status messages
-Transmission of operational status and fault status messages and detailed service
information via additional OCI400 interface and ACS400 / ACS410 PC software
Type summary
Type reference Mains
voltage
Fuel
valve
stages
Burner
capacity
¹) Remote
reset
Times Comparable type of
LOA... 4)
tw
max.
t1 / t1´
min.
TSA
max.
t3
min.
t3n
max.
t4
min.
Standard versions
LMO14.111C2 AC 230 V 1 <30 kg/h x x 2.5 s 15 / 16 s 10 s 15 s 10 s --- LOA24.171B27
LOA26.171B27 ²)
LOA36.171A27 ²)
LMO14.113C2
AC 230 V
1
<30 kg/h
x x
2.5 s
15 / 16 s
10 s
15 s
3 s
---
LOA24.173A27 ³)
LMO24.111C2 AC 230 V 2 <30 kg/h x x 2.5 s 15 / 16 s 10 s 15 s 10 s 15 s LOA24.171B27
LOA26.171B27 ²)
LOA36.171A27 ²)
LMO24.111C1
AC 120 V
2
<30 kg/h
x x
2.5 s
15 / 16 s
10 s
15 s
10 s
15 s
LOA24.171B17
LMO24.255C2
AC 230 V
2
</> 30 kg/h
x x
2.5 s
25 / 26 s
5 s
25 s
5 s
15 s
---
Version for flash-steam generators
LMO24.011C2
AC 230 V
2
<30 kg/h
x x
2.5 s
5 / 6 s
10 s
5 s
10 s
15 s
LOA24.571C27
Suited for direct-fired air heaters
LMO44.255C2
AC 230 V
2
</> 30kg/h
x x
2.5 s
25 / 26 s
5 s
25 s
5 s
5 s
LOA44.252A27
TSA
Ignition safety time
tw
Waiting time
t1
Prepurge time
t1’
Purge time
t3
Preignition time
t3n
Postignition time
t4
Interval from flame signal to release of fuel valve 2 (BV2)
¹)
Bridging contact for oil preheater
²)
No actuator (SA) function
³) In case of replacement, ignition transformer must be rewired from terminal 7
(LOA...) to terminal 6 (LMO...)
4) LMO... can replace LOA..., but the instructions given in the Data Sheet, other
technical documentation and the specification must be followed
Indication and
diagnostics
Legend

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Ordering
Oil burner control (without plug-in base) refer to «Type summary»
Connection accessories for small burner controls refer to Data Sheet N7201
-Plug-in base AGK11...
-Cable holders AGK65..., AGK66
Flame detectors
-Photo resistive detectors QRB1... refer to Data Sheet N7714
-Blue-flame detectors QRC1... refer to Data Sheet N7716
Interface OCI400 refer to Data Sheet N7614
Interface between burner control and PC
Facilitates viewing and recording setting parameters on site in connection with the
ACS400 / ACS410 PC software
PC software ACS400 refer to User Documentation J7350
PC software for visualizing the burner controls
PC software ACS410 refer to User Documentation J7352
PC software for setting the parameters and for visualizing the burner controls
Demo case KF8891 refer to User Manual B7989
-For demonstrating the functions of burner controls
Test adapter KF8885 refer to Operating Instructions B7986
-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
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
Extension of lockout reset button
-Extension 19 mm: AGK20.19
-Extension 43 mm: AGK20.43
-Extension 55 mm:
AGK20.55

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Technical data
Mains voltage AC 230 V +10 % / -15 %
AC 120 V +10 % / -15 %
Mains frequency
50...60 Hz ±6 %
External primary fuse (Si)
6.3 A (slow)
Power consumption
12 VA
Perm. mounting orientation
Optional
Weight
Approx. 200 g
Safety class
I (burner control with plug-in base)
Degree of protection
IP40 (to be ensured through mounting)
Perm. cable lengths
Max. 3 m at a line capacitance of 100 pF/m
Detector cable laid separately
10 m
Remote reset laid separately
20 m
Perm. current at cos
M t
0.6
LMO14...
LMO24...
LMO44...
Terminal 1
Max. 5 A
Max. 5 A
Max. 5 A
Terminals 3 and 8
Max. 3 A
Max. 3 A
Max. 3 A
Terminals 4 and 5
Max. 1 A
Max. 1 A
Max. 1 A
Terminal 6
Max. 1 A
Max. 2 A
Max. 2 A
Terminal 10
Max. 1 A
Max. 1 A
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
-LMO14... / LMO24...
-
LMO44...
-5...+60 °C
-20...+60 °C
Humidity
<95 % r.h.
Attention!
Condensation, formation of ice and ingress of water are not permitted! If this is
not observed, there is a risk of loss of safety functions and a risk of electric
shock.
General unit data
Environmental
conditions

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Technical data (cont´d)
Detector current
required
(with flame)
Perm. detector
current
(without flame)
Possible detector current
with flame
(typically)
QRB... ¹)
Min. 45 µA
Max. 5.5 µA
100 µA
QRC... ¹)
Min. 45 µA
Max. 5.5 µA
70 µA
Detector current in operation:
- Flame signal instable
- Green LED flashing
Detector current in operation:
- Flame signal stable
- Green 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 120 V or AC 230 V
- Ambient temperature 23 °C
QRB... QRC...
12
11 LMO...
bl
µA DC
+
QRB...
7130v01/0700
sw
12
11 LMO... 1
swbl br
µA DC
+
QRC1...
7130v02/0700
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 Interface OCI400 / with PC
software ACS400 / ACS410 can be used. In that case, the DC microammeter is not
required.
Flame supervision with
QRB... or QRC...
Green LED for
operational status
indication
Measuring circuit
for detector current

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Function
xBurner control is reset
xReset button «EK1» or «EK2» not used
xAll contacts in the line are closed and there is demand for heat
xNo undervoltage
xFlame detector is darkened and there is no extraneous light
xSafety shutdown from the operating position takes place should mains voltage drop
below about AC 165 V (UN= AC 230 V) or AC 75 V (UN= AC 120 V)
xRestart is initiated when mains voltage exceeds about AC 175 V (UN= AC 230 V)
or AC 95 V (UN= AC 120 V)
If the oil preheater’s release contact does not close within 10 minutes, the burner control
will initiate lockout.
After no more than 24 hours of continuous operation, the burner control will initiate
automatic controlled shutdown followed by a restart.
If lockout occurs, the outputs for the fuel valves, the burner motor and the ignition
equipment will immediately be deactivated (<1 second). In the event of lockout, the
LMO... remains locked and the red signal lamp (LED) will light up. The burner control can
immediately be reset. This state is also maintained in the case of mains failure.
Cause
Response
Mains failure
Restart
Voltage has fallen below the undervoltage
threshold
Safety shutdown, followed by restart
Extraneous light during prepurge time (t1), 5
s before fuel valve (BV1) release
Lockout at the end of prepurge time (t1)
Extraneous light during waiting time (tw) Prevention of startup, lockout after 40
seconds at the latest
No flame at the end of safety time (TSA) Lockout at the end of safety time (TSA), blink
code 2
Loss of flame during operation
Max. 3 repetitions, followed by lockout
Oil preheater’s release contact does not
close within 10 minutes
Lockout
When lockout occurs, the burner control can immediately be reset. 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 safety time (TSA), the burner will be reignited, but only until the
end of safety time (TSA). This means that several ignition attempts can be made during
safety time (TSA) (see Control sequence).
If the flame is lost during operation, a maximum of 3 repetitions can be made. If the
flame is lost for the fourth time during operation, the burner will initiate lockout. The
repetition count is restarted each time controlled switching on by control thermostat or
pressurestat (R) takes place.
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
LMO14.113x2 and
LMO24.113x2
Limitation of repetitions

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Operation, display, diagnostics
EK
7130z05/0700
Lockout reset button «EK» is the key operating element for resetting
the burner control and for activating / deactivating the diagnostic
functions.
LED
7130z06e/0700
Red
Yellow
Green
The multicolor signal lamp (LED) in the lockout reset button is the key
indicating element for both visual diagnostics and interface diagnostics.
Both «EK» and LED are located under the transparent cover of the lockout reset
button.
There are 2 diagnostic choices:
1. Visual diagnostics: Operational status indication or diagnostics of the cause of
fault.
2. Interface diagnostics: With the help of the interface OCI400 and PC software
ACS400 / 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 given below.
During startup, status indication takes place according to the following table:
Color code table for multicolor signal lamp (LED)
Status
Color code
Color
Waiting time «tw», other waiting states
........................................
Off
Oil preheater on
z
........................................
Yellow
Ignition phase, ignition controlled
z  z  z  z  z  z
Flashing yellow
Operation, flame o.k.

........................................
Green
Operation, flame not o.k.
         
Flashing green
Extraneous light on burner startup
SSSSS
Green-red
Undervoltage
zSzSzSzSz
Yellow-red
Fault, alarm
S
.......................................
Red
Error code output (refer to «Error code
table»)
SSSS
S
Flashing red
Interface diagnostics
S
S
S
S
S
S
S
S
Red flicker light
......
Steady on
S
Red

Off
z
Yellow

Green
Operation
Operational status
indication
Legend

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Operation, display, diagnostics (cont´d)
After lockout, the red signal lamp (LED) 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. Interface
diagnostics works only if the AGK20… lockout reset button extension is not fitted. 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 instant 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
7130z04e/0602
Reset
On
Visual diagnostics
Lockout position Lockout position Lockout position
Error code table
Red blink code of signal
lamp (LED)
Alarm
(AL) at
term. 10
Possible cause
2 blinks On No establishment of flame at the end of safety
time (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
Time supervision oil preheater
9 blinks
On
Free
10 blinks Off Wiring fault or internal fault, output contacts,
other faults
During the time the cause of fault is diagnosed, the control outputs are deactivated
burner remains shut down.
The diagnostics of the cause of fault is quit and the burner switched on again by
resetting the burner control. Press the lockout reset button for about 1 second (<3
seconds).
Diagnostics of the
cause of fault