Siemens LMO64 Series User manual

CC1N7138en
22.07.2002
Siemens Building Technologies
HVAC Products
ISO 9001
7138
Oil Burner Controls LMO64...
Microcontroller-based oil burner controls for the supervision, startup and control
of forced draft oil burners in intermittent operation. 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 single- or
2-stage forced draft oil burners in intermittent operation. Yellow-burning flames are
supervised with photoresistive detectors QRB..., blue-burning flames with blue-flame
detectors QRC... .
- Forced draft oil burners conforming to EN 267
- Burner controls for use with atomization burners of monoblock design conforming to
EN 230
- 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
General features
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 LMO64...,
completely isolate the burner control from the mains supply (all-polar disconnec-
tion)
·Ensure protection against electric shock hazard by providing adequate protection
for the burner control’s connection terminals
·Check wiring and all safety functions prior to commissioning
·Press the lockout reset button / operation 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 that the relevant national safety regulations are complied with
Installation notes
·Installation work must be carried out by qualified staff
·To ensure that the LMO64... does not get mixed up with other types of burner con-
trols, it may only be used in connection with the grey plug-in base AGK11.6. In par-
ticular, it must be made certain that the line for the control thermostat or pressur-
estat «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»)
·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... may
never be plugged in
·Do not mix up live and neutral conductors
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»)
7138m01/0801
N3132
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Commissioning notes
·Commissioning and maintenance work must be carried out by qualified staff
·When commissioning the plant or when doing maintenance work, make the follow-
ing safety checks:
Safety check Anticipated responce
a) Burner startup with flame detector dark-
ened
Lockout at the end of «TSA»
b) Burner startup with flame detector ex-
posed to extraneous light
Lockout 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
Start repetition followed by lock-
out at the end of «TSA»
Norms and standards
CE conformity according to the directives of the European Union
- Electromagnetic compatibility EMC (Immunity) 89 / 336 EEC
- Low-voltage directive 73 / 23 EEC
Service notes
Check wiring and all safety functions each time a burner control has been replaced.
Disposal notes
The unit contains electrical and electronic components and may not be disposed of
together with household barbadge.
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 plug-in bases AGK11.6 are silver-grey (RAL7001).
The housing accommodates the
- microcontroller, which controls the program sequence, and the relays for load con-
trol,
- electronic flame signal amplifier,
- lockout reset button with its integrated 3-color signal lamp for status and fault mes-
sages and the socket for connecting the interface adapter OCI400
- Multicolor 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.
Display and diagnosis

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Type summary
¹) Remote
reset
TimesType reference Mains
voltage
Fuel
valve
stages
Burner
capacity
tw
max.
t1 / t1´
min.
TSAma
x.
t3
min.
t3n
max.
t4
min.
t8
max.
Standard versions
LMO64.300B2 AC 230 V 1 < 30 kg / h ·· 5 s 15 / 16 s 10 s 15 s 10 s --- 20 s
LMO64.301B2 AC 230 V 1 < 30 kg / h ·· 5 s 15 / 16 s 10 s 15 s 10 s --- 90 s
LMO64.302B2* AC 230 V 1 < 30 kg / h ·· 5 s 15 / 16 s 10 s 15 s 3 s --- 20 s
LMO64.310B2 AC 230 V 2 < 30 kg / h ·· 5 s 15 / 16 s 10 s 15 s 10 s 15 s 20 s
LMO64.311B2 AC 230 V 2 < 30 kg / h ·· 5 s 15 / 16 s 10 s 15 s 10 s 15 s 90 s
* On request only!
TSAmax. Maximum ignition safety time
tw Waiting time
t1 Prepurge time
t1´ Purge time
t3 Preignition time
t3n Postignition time
t4 Interval from flame signal to the release of «BV2»
t8 Postpurge time
¹) Bridging contact for oil preheater
Ordering
Oil burner control, (without grey plug-in base) refer to «Type summary»
Plug-in base (grey) AGK11.6
Electrical connections refer to Data Sheet 7201
- Plug-in base AGK11.6
- Cable holders AGK65, AGK66, AGK67...
- Cable strain relief elements for AGK67...
Flame detectors
- Photoresistive detectors QRB1... refer to Data Sheet 7714
- Blue-flame detectors QRC1... refer to Data Sheet 7716
Diagnostic tool refer to Data Sheet 7614
- Interface adapter OCI400
- PC Windows software ACS400
Legend

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Technical data
Mains voltage AC 230 V +10 % / -15 %
Mains frequency 50...60 Hz ±6 %
External primary fuse (Si) 6.3 A (slow)
Power consumption 12 VA
Mounting position optional
Weight approx. 200 g
Degree of protection IP 40 (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 20 m
Remote reset laid separately 20 m
Max. perm. amperage at cos j³0.6 LMO64.30... LMO64.31...
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 DIN EN 60 721-3-2
Climatic conditions class 2K2
Mechanical conditions class 2M2
Temperature range -30...+70 °C
Humidity < 95 % r.h.
Operation DIN EN 60 721-3-3
Climatic conditions class 3K5
Mechanical conditions class 3M2
Temperature range
- LMO64...
- LMO64...
-5...+60 °C
-20...+60 °C
Humidity < 95 % r.h.
Condensation, formation of ice and ingress of water are not permitted!
Min. detector current
required (with flame)
Max. perm. detector current
(without flame)
Max. possible detector
current with flame (typically)
QRB... 45 µA 5.5 µA 100 µA
QRC... 70 µA 5.5 µA 100 µA
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 kW
bl Blue
sw Black
br Brown
As an alternative to detector current measurement, the diagnostic tool OCI400 /
ACS400 can be used. In that case, connection of the DC microammeter is not required.
General unit data
Environmental
conditions
Flame supervision with
QRB... and QRC...
Measurement circuit for
detector current

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Function
·Burner control is reset
·All contacts in the line are closed and there is demand for heat
·No undervoltage
·Flame detector is darkened and there is no extraneous light
·Safety shutdown in the operating position takes place should the mains voltage
drop below about AC 165 V (UN= AC 230 V)
·Restart is initiated when mains voltage exceeds about AC 175 V (UN= AC 230 V)
If the oil preheater’s release contact does not close within 10 minutes, the burner control
will initiate lockout.
After 24 hours of continuous operation at the latest, the burner control will initiate auto-
matic safety shutdown followed by a restart.
If lockout occurs, the outputs for the fuel valves, burner motor and ignition will immedi-
ately be deactivated (< 1 second).
Cause Response
Mains failure Restart
Voltage has fallen below the undervoltage threshold Restart
Extraneous light during «t1» Lockout at the end of «t1»
Extraneous light during «tw» Prevention of startup, lockout after no more
than 40 seconds
No flame at the end of «TSA» Lockout at the end of «TSA»
Flame is lost during operation Max. 3 repetitions, followed by lockout
Oil preheater’s release contact does not close within 10 min. Lockout
In the event of lockout, the LMO64... remains locked (lockout cannot be changed), and
the red signal lamp will light up.
The burner control can immediately be reset.
This status is also maintained in the case of a mains failure.
Whenever lockout occurs, the burner control can immediately be reset. To do this, press
the lockout reset button 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 «Pro-
gram sequence»).
If the flame is lost during operation, a maximum of 3 repetitions can be made.
Each time the flame is lost during operation, safety lockout will be initiated.
The red signal lamp will flash.
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 «R-W-SB» 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 LMO64.302...
Limitation of repetitions

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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 func-
tions.
LED
7138z01e/0602
Red
Yellow
Green
The multicolor LED is the key indicating element for both visual diag-
nostics and interface diagnostics.
Both «EK...» and LED are located under the transparent cover of the lockout reset
button.
There are 2 diagnostic choices available:
1. Visual diagnostics: Operational status indication.
2. Interface diagnostics: With the help of the interface adapter OCI400 and PC soft-
ware ACS400 or flue gas analyzers of different makes (refer to Data Sheet 7614).
Visual diagnostics:
In normal operation, the different operational statuses are indicated in the form of color
codes according to the color code table. Interface diagnostics is activated by pressing
the lockout reset button for at least 3 seconds (refer to Data Sheet 7614). If, by acci-
dent, 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.
Operating position
EK
> 3 s
Interface diagnosis
PC / analyzer
7138z02e/00602
Visual diagnosis
xxxx xxxx
xxxx xxxx
xxxx xxxx
xxxx xxxx
xxxx xxxx
xxxx xxxx
Colour code table
Operating position
During startup, status indication takes place according to the following table:
Color code table
Status Color code Color
Waiting time «tw», standby on con-
tinuous phase, waiting statuses
❍......................................... Off
Oil preheater heats ●.......................................... Yellow
Ignition phase, ignition controlled ●❍●❍●❍●❍●❍●Flashing yellow
Operation, flame o.k. ❏.......................................... Green
Operation, flame not o.k. ❏❍❏❍❏❍❏❍❏❍Flashing green
Extraneous light on burner startup ❏=❏=❏=❏=❏=❏Green-red
Undervoltage ●=●=●=●=●=●Yellow-red
Fault, alarm =.......................................... Red flashing
Output of fault code (refer to «Error
code table»)
=❍=❍=❍=❍=❍Red flicker light
Interface diagnosis =======Red flicker light
...... Permanent =Red
❍Off ●Yellow
❏Green
Operation
Operational status
indication
Legend

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After lockout, 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 lockout 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
xxxx xxx x
xxxx xxx x
xxxx xxx x
xxxx xxx x
xxxx xxx x
xxxx xxx x
Error code table
EK
> 3 s
Interface diagnosis
PC / analyzer
OCI400
EK
< 3 s
7138z03e/0602
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 equipment
3 blinks
hhh
Free
4 blinks
hhhh
Extraneous light on burner startup
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
Timer supervision oil preheater
9 blinks
hhhhhhhhh
Free
10 blinks
hhhhhhhhhh
Wiring fault or internal fault, output contacts, or other faults
During the time the cause of fault is diagnosed, the control outputs are deactivated. The
burner remains shut down.
The diagnosis 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).
Diagnosis of
cause of fault

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Connection diagram and internal diagram
LMO64.30... LMO64.31...
126745
10 11 12
W
SB
R
L
N
MZBV1
AL
Si
83
OW
OH
N
83
QRB
QRC
br
bl sw
1
7138a01/0801
9
EK2
EK1 µC-Steuerung
K1 K2
K3
FSV
µC2
LED
kbr
µC1
126745
10 11 12
W
SB
R
L
N
MZBV1
AL
Si
83
OW
OH
N
83
QRB
QRC
br
bl sw
1
7138a02/0502
9
EK2
EK1 µC-Steuerung
K1 K2
K3
FSV
µC2
LED
kbr
µC1
BV2
Control sequence
LMO64.30... LMO64.31...
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
7138d01/0402
nur bei LMO64.302...: Wiederzündung t3n t3n
t1
1
W
SB
E
t8
R
OH
OW
M
Z
BV1
FS
A
´
A
BC
D
7
8
3
3
6
4
11
12
t1´
t3
t3n
TSA
tw
7138d02/0402
t1
1
W
SB
E
t8
BV2 5
t4
AL Alarm device OW Release contact of oil preheater
BV... Fuel valve OH Oil preheater
EK1 Lockout reset button QRB Photoresistive detector
EK2 Remote lockout reset button QRC Blue-flame detector
FS Flame signal bl = blue, br = brown, sw = black
FSV Flame signal amplifier R Control thermostat or pressurestat
K... Contacts of control relay SB Safety limit thermostat
kbr Cable link (required only when oil preheater is not
used)
Si External primary fuse
LED 3-color signal lamps W Limit thermostat or pressure switch
M Burner motor Z Ignition transformer
TSA Ignition safety time t3n Postignition time
tw Waiting time t4 Interval from flame signal
t1 Prepurge time to release «BV2»
t1´ Purge time t8 Postpurge time
t3 Preignition time
A´ Beginning of startup sequence with burners using an
oil preheater
C Operating position
A Beginning of startup sequence with burners using no
oil preheater
D Controlled shutdown by «R»
B Time of flame establishment E End of startup sequence
Control signals µC1 Microcontroller 1
Required input signals µC2 Microcontroller 2
Permissible input signals
Legend

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Dimensions
Dimensions in mm
7,44
51,66
88,5
91
41,64
47,25
62,5
7138m02/0402
22
LMO64.300B2
Color of plastic: Silver-grey (RAL7001)
LMO64...
ã2002 Siemens Building Technologies AG
Subject to change