Siemens LMO14 Series User manual

CC1N7130en
31.07.2000
Siemens Building Technologies
Landis & Staefa Division
ISO 9001
7130
Oil Burner Controls LMO14...
LMO24...
LMO44...
Microcontroller-based oil burner controls for the supervision, start-up and con-
trol of forced draught oil burners in intermittent operation. Oil throughput up to
30 kg / h with the LMO14... and LMO24..., and above 30 kg / h with the LMO44...
The LMO14..., LMO24..., LMO44... and this data sheet are intended for OEMs
which integrate the burner controls in their products.
Use The LMO... burner controls are designed for the start-up and supervision of single- or 2-
stage forced draught oil burners in intermittent operation.
Yellow-burning flames are supervised with photoresistive detectors QRB..., blue-
burning flames with blue-flame detectors QRC...
In terms of housing dimensions, electrical connections and flame detectors, the LMO...
are identical to the LOA... oil burner controls.
- Forced draught oil burners conforming to EN 267
- LMO44... for stationary direct-fired air heaters
- Burner controls for use with atomization oil burners of monoblock design conform-
ing to EN 230
- Detection of undervoltages
- Electrical remote reset
- Contact for oil pre-heating
- Monitoring of time for oil pre-heating
- Accurate and reproducible program sequence thanks to digital signal handling
- Controlled intermittent operation after 24 hours of continuous operation
- Limitation of the number of repetitions
- Multicolour indication of fault and status messages
Application-specific
features

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Warning notes
To avoid injury to persons, damage to property or the environment, the following
warning notes should be observed!
Do not open, interfere with or modify the unit!
•Before performing any wiring changes in the connection area of the LMO..., com-
pletely isolate the burner control from the mains supply (all-polar disconnection)
•Ensure protection against electric shock hazard by providing adequate protection
for the burner control’s terminals
•Check wiring and all safety functions
•Press the lock-out reset button only manually (applying a force of no more than
10 N), without using any tools or pointed objects
•Fall or shock can adversely affect the safety functions. Such units may not be put
into operation, even if they do not exhibit any damage
Mounting notes
•Ensure the relevant national safety regulations are complied with
Installation notes
•Installation and commissioning work must be carried out by qualified staff
•Observe the permissible lengths of the detector cables (refer to «Technical data»)
•Always run the 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 the maximum permissible amperages will not be exceeded (refer to «Tech-
nical 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 LMO... may
never be plugged in
•Make certain the live wires are correctly connected
Commissioning notes
•Commissioning and maintenance work must be carried out by qualified staff
•When commissioning the plant, when doing maintenance work, or after longer off
periods, make the following safety checks:
Safety check Anticipated response
a) Burner start-up with flame detector dark-
ened Lock-out at the end of «TSA»
b) Burner start-up with flame detector ex-
posed to extraneous light Lock-out after no more than 40 seconds
c) Burner operation with simulated flame
failure; for that purpose, darken the flame
detector during operation and maintain
that status
Restart followed by lock-out at
the end of «TSA»

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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.
The housing accommodates the
- microcontroller, which controls the program sequence, and the relays for load con-
trol
- electronic flame signal amplifier
- lock-out reset button with its integrated 3-colour signal lamp for status and fault
messages and the socket for connecting the interface adapter OCI400
- Multicolour display of status and fault messages
- Transmission of status and fault messages as well as detailed service information
by additional interface adapter OCI400 and PC Windows software ACS400
Type summary
TimesType reference Mains
voltage Fuel
valve
stages
Burner
capacity Oil pre-heater contact Remote reset tw
max. t1 min. TSAm ax. t3 min. t3n max. t4 min.
Comparable
type of
LOA...
Standard versions
LMO14.111A2 AC 230 V 1 < 30 kg / h ••5 s 16 s 10 s 15 s 10 s --- LOA24.171B27
LOA26.171B27
LOA36.171A27
LMO14.111A1 AC 110 V 1 < 30 kg / h ••5 s 16 s 10 s 15 s 10 s --- LOA24.171B17
LMO14.113A2 AC 230 V 1 < 30 kg / h ••5 s 16 s 10 s 15 s 3 s --- LOA24.173A27
LMO24.111A2 AC 230 V 2 < 30 kg / h ••5 s 16 s 10 s 15 s 10 s 15 s LOA24.171B27
LOA26.171B27
LOA36.171A27
LMO24.111A1 AC 110 V 2 < 30 kg / h ••5 s 16 s 10 s 15 s 10 s 15 s LOA24.171B17
LMO24.113A2 AC 230 V 2 < 30 kg / h ••5 s 16 s 10 s 15 s 3 s 15 s LOA24.173A27
Version for flash-steam generators
LMO24.011A2 AC 230 V 2 < 30 kg / h ••5 s 6 s 10 s 5 s 10 s 15 s LOA24.571C27
Version for direct fired air heaters WLE
LMO44.255A2 AC 230 V 2 > 30 kg / h ••5 s 26 s 5 s 25 s 5 s 5 s LOA44.252A27
TSAmax. Maximum ignition safety time
tw Waiting time
t1 Pre-purge time
t3 Pre-ignition time
t3n Post-ignition time, maximum until the end of «TSAmax»
t4 Interval from flame signal to the release of «BV2»
Display and diagnosis
Legend

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Ordering
Oil burner control, without plug-in base refer to «Type summary»
Electrical connections refer to data sheet 7201
- Plug-in base AGK11
- Cable holders AGK65, AGK66, AGK67...
- Cable tension relief elements for AGK67...
Flame detectors
- Photoresistive detectors QRB1... refer to data sheet 7714
- Blue-flame detector QRC1... refer to data sheet 7716
Diagnostic tool refer to data sheet 7614
- Interface adapter OCI400
- PC Windows software ACS400
Test case, for making functional tests KF8843
Test adapter KF8833
- With signal lamps for program indication
- With one pair of jacks for measuring the flame detector current
Test adapter KF8840
- With signal lamps for program indication
- With holes for checking the control voltages at the tabs of the burner control
- With on / off switch for simulating the flame signal
- With one pair of jacks for measuring the flame detector current
Test adapter KF8885
- With switch for manual start-up of burner
- With switch for simulating the oil pre-heater’s release contact
- With 2 pairs of jacks for measuring the flame detector current

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Technical data
Mains voltage AC 230 V +10 % / -15 %
AC 110 V +10 % / -15 %
Mains frequency 50...60 Hz ±6 %
External primary fuse (Si) 5 A (slow)
Power consumption 12 VA
Mounting orientation optional
Weight approx. 200 g
Degree of protection IP 40
Perm. cable lengths max. 3 m at a line capacitance of 100 pF/m
Detector cable laid separately 20 m
Remote reset 20 m
Max. perm. amperage at
cos ϕ≥0.6 LMO14... LMO24... / LMO44...
Terminal 1 5 A 5 A
Terminals 3 and 8 3 A 5 A
Terminals 4, 5, 6 and 10 1 A 1 A
Transport IEC 721-3-2
Climatic conditions class 2K2
Temperature range -30...+70 °C
Humidity < 95 % r.h.
Operation IEC 721-3-3
Climatic conditions class 3K5
Mechanical conditions class 2M2
Temperature range
- LMO14... / LMO24...
- LMO44... -5...+60 °C
-20...+60 °C
Humidity < 95 % r.h.
Condensation, formation of ice and ingress of water are not permitted!
CE conformity
According to the directives of the European Union
Electromagnetic compatibility EMC 89 / 336 EEC incl. 92 / 31 EEC
Low voltage directive 73 / 23 EEC
QRB...
Type reference
Min. detector current
required (with flame)
Max. detector current
permitted
(without flame)
Max. possible with
flame (typically)
LMO14...
LMO24...
LMO44...
45 µA 5.5 µA 100 µA
QRC...
Type reference
Min. detector current
required (with flame)
Max. detector current
permitted
(without flame)
Max. possible with
flame (typically)
LMO14...
LMO24...
LMO44...
70 µA 5.5 µA 100 µA
General unit data
Environmental
conditions
Norms and standards
Flame supervision with
QRB... and QRC...

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Function •Burner control is reset
•All contacts in the line are closed
•No undervoltage
•Flame detector is darkened, no extraneous light
•Safety shut-down in the operating position takes place should the mains voltage
drop below about AC 165 V
•Restart is initiated when the mains voltage exceeds about AC 175 V
If the oil pre-heater’s release contact does not close within 10 minutes, the burner control
will initiate lock-out.
After no more than 24 hours of continuous operation, the burner control will initiate an
automatic safety shut-down followed by a restart.
If lock-out occurs, the outputs for the fuel valves and the ignition will immediately be
deactivated (< 1 second).
Cause Response
After a mains failure Restart
After voltage has fallen below the undervoltage threshold Restart
In the event of a premature, faulty flame signal during «t1» Lock-out at the end of «t1»
In the event of a premature, faulty flame signal during «tw» Prevention of start-up, lock-out after no more than
40 seconds
If the burner does not ignite during «TSA» Lock-out at the end of «TSA»
In the event the flame is lost during operation Max. 3 repetitions, followed by lock-out
Oil pre-heater’s release contact does not close within 10 min. Lock-out
In the event of lock-out, the LMO... remains locked (lock-out cannot be changed), and the
red signal lamp will light up. This status is also maintained in the case of a mains failure.
Whenever lock-out occurs, the burner control can immediately be reset. To do this, keep
the lock-out reset button depressed for about 1 second (< 3 seconds).
If the flame is lost during «TSA», the burner will be reignited, but not later than at the
end of «TSAmax.». This means that several ignition attempts can be made during
«TSA» (refer to «Program sequence»).
If the flame is lost during operation, a maximum of 3 repetitions can be made. If the
flame is lost for the 4th time during operation, the burner will initiate lock-out. The repeti-
tion count is restarted each time controlled switching on by «R-W-SB» takes place.
QRB... QRC...
12
11 LMO...
bl
µA DC
+
QRB...
7130v01/0700
sw
1211 LMO... 1
sw
bl br
µA DC
+
QRC1...
7130v02/0700
As an alternative to the detector current measurement, the diagnostic tool OCI400 /
ACS400 can be used. In that case, connection of the DC microammeter is not required.
Legend µA DC DC microammeter with an internal resistance of Ri = max. 5 kΩbl Blue
sw Black
br Brown
Preconditions for start-
up
Undervoltage
Time supervision oil
pre-heater
Controlled intermittent
operation
Control sequence in the
event of fault
Lock-out
Resetting the burner
control
Ignition program with
LMO14.113A2 and
LMO24.113A2
Limitation of repetitions
Measurement circuit for
detector current

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Operation, display, diagnostics
EK
7130z05/0700
Lock-out reset button «EK...» is the key operating element for resetting
the burner control and for activating / deactivating the diagnostic func-
tions.
LED
7130z06e/0700
Red
Yellow
Green
The multicolour «LED» is the key indicating element for both visual
diagnosis and interface diagnosis.
Both «EK...» and «LED» are located under the transparent cover of the lock-out reset
button.
There are 2 diagnostic choices available:
1. Visual diagnosis: operational status indication.
2. Interface diagnosis: with the help of the interface adapter OCI400 and PC software
ACS400 or flue gas analyzers of different makes (refer to data sheet 7614).
Visual diagnosis:
In normal operation, the different operational statuses are displayed in the form of col-
our codes according to the colour code table. The interface diagnosis is activated by
pressing the lock-out reset button for at least 3 seconds (refer to data sheet 7614). If,
by accident, the interface diagnosis has been activated, in which case the slightly red
light of the signal lamp flickers, it can be deactivated by pressing again the lock-out
reset button for at least 3 seconds. The moment of switching over is indicated by a
yellow light pulse.
Operating position
EK
> 3 s
Interface diagnosis
PC / analyzer
7130z01e/0800
Visual diagnosis
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Colour code table
Operating position
Colour code table
Status Colour code Colour
Oil pre-heater heats, waiting time «tw» ●●●●●●●●●●●Yellow
Ignition phase, ignition controlled ●❍●❍●❍●❍●❍●Yellow-off
Operation, flame o.k. ❏❏❏❏❏❏❏❏❏❏❏❏Green
Operation, flame not o.k. ❏❍❏❍❏❍❏❍❏❍❏Green-off
Undervoltage ●▲●▲●▲●▲●▲●Yellow-red
Fault, alarm ▲▲▲▲▲▲▲▲▲▲▲Red
Output of fault code (refer to «Fault
code table») ▲❍ ▲❍ ▲❍ ▲❍ ▲❍ Red-off
Extraneous light prior to burner start-
up ❏▲❏▲❏▲❏▲❏▲❏Green-red
Interface diagnosis ▲▲▲▲▲▲▲▲▲▲▲▲▲▲ Red flicker light
❍Off
●Yellow
❏Green
▲Red
Operation
Operational status indi-
cation
Legend

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After lock-out, the red fault signal lamp remains steady on.
In that condition, the visual diagnosis of the cause of fault according to the error code
table can be activated by pressing the lock-out reset button for more than 3 seconds.
Pressing the reset button again for at least 3 seconds, the interface diagnosis will be
activated (for more detailed information, refer to data sheet 7614).
The following sequence activates the diagnosis of the cause of fault:
EK
> 3 s
Flashing
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Error code table
EK
> 3 s
Interface diagnosis
PC / analyzer
OCI400
EK
< 3 s
7130z04e/0800
Reset
On
Visual diagnosis
Fault position Fault position Fault position
Error code table
Blink code Possible cause
2 blinks
hh
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
3 blinks
hhh
Free
4 blinks
hhhh
Extraneous light on burner start-up
5 blinks
hhhhh
Free
6 blinks
hhhhhh
Free
7 blinks
hhhhhhh
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
hhhhhhhh
Time supervision oil pre-heater
9 blinks
hhhhhhhhh
Free
10 blinks
hhhhhhhhhh
Wiring error or internal error, output contacts
During the time the cause of fault is diagnosed, the control outputs are deactivated.
- Burner remains shut down
- Fault status signal «AL» at terminal 10 is activated
The diagnosis of the cause of fault is quit and the burner switched on again by resetting
the burner control.
Press lock-out reset button for about 1 second (< 3 seconds).
Diagnosis of cause of
fault

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Connection diagram and internal diagram
LMO14... LMO24... / LMO44...
126745
10 11 12
W
SB
R
L
NMZBV1
AL
Si
83
OW
OH
N
83QRB
QRC
br
bl sw
1
7130a01e/0700
9
EK2
EK1 µC control
K1 K2
K3
FSV
µC2
LED
kbr
µC1
126745
10 11 12
W
SB
R
L
NMZBV1
AL
Si
83
OW
OH
N
83QRB
QRC
br
bl sw
1
7130a02e/0700
9
EK2
EK1 µC control
K1 K2
K3 K4
BV2
LED
kbr
FSV
µC2
µC1
Control sequence
LMO14... LMO24... / LMO44...
R
W
SB
OH
OW
M
Z
BV1
FS
A´ AB C D1
8
3
3
6
4
11
12
t1
t3
t3n
TSA
tw
Z
FS
6
11
12
7130d02e/0700
Only with LMO14.113A2: re-ignition t3n t3n
R
W
SB
OH
OW
M
Z
BV2
FS
A´ AB C D1
8
3
3
6
5
11
12
t1
t3
t3n
TSA
tw
Z
FS
6
11
12
7130d03e/0700
Only with LMO24.113A2: re-ignition t3n t3n
BV1 4
AL Alarm device OH Oil pre-heater
kbr... Cable link (required only when no oil pre-heater is used) QRB Photoresistive detector
BV... Fuel valve QRC Blue-flame detector
EK1 Lock-out reset button bl = blue
EK2 Remote lock-out reset button br = brown
FS Flame signal sw = black
FSV Flame signal amplifier R Control thermostat or pressurestat
K... Contacts of control relay SB Safety limit thermostat
LED 3-colour signal lamps Si External primary fuse
M Burner motor W Limit thermostat or pressure switch
OW Release contact of oil pre-heater Z Ignition transformer
t1 Pre-purge time t4 Interval from flame signal to release «BV2»
t3 Pre-ignition time TSA Ignition safety time
t3n Post-ignition time tw Waiting time for oil pre-heating
A´ Beginning of start-up sequence with burners using an oil pre- B Time of flame establishment
heater C Operating position
A Beginning of start-up sequence with burners using no oil pre- D Controlled shut-down by «R»
heater
Control signals µC1 Microcontroller 1
Required input signals µC2 Microcontroller 2
Legend

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Dimensions
Dimensions in mm
7,44
51,66
88,5
91
41,64
47,25
62,5
7130m02/0600
7130m01/0700
5,4
16,2
4
17
23,5
4,5
10,5
24
24
30 30
N31 32
123456789101112
A
B
C
88
62,5
Plug-in base with screw terminals
«A»: holes for the fixing screws
«B»: holes for the cable entry
«C»: earthing lug
«31» and «32»: auxiliary terminals
«N»: neutral terminals, connected to the neutral input
(terminal 2)
Underneath:
4 earth conductor terminals, joining in a lug for
earthing the burner
Hatched:
Position of cable gland holder AGK65 and cable
holder AGK66
Connection of earthing lug «C» and fixing screws in «A» to burner ground
→Use a metric screw with a lockwasher or similar!
LMO...
Plug-in base AGK11
2000 Landis & Staefa Produktion GmbH