Siemens LAL Series User manual

CC1N7153en
21.09.2016
Building Technologies Division
7153
Oil Burner Controls LAL...
Oil burner controls
For oil atomizing burners of medium to large capacity
For multistage or modulating burners in intermittent operation
With or without air pressure supervision for checked air damper control
Flame supervision
– with photoresistive detector QRB
– or blue-flame detector QRC1
– or silicon photocell detector RAR9
Suitable for use with air heaters (WLE)
The LAL and this Data Sheet are intended for OEMs which integrate the oil
burner controls in their products!
Use
For the control and supervision of oil atomization burners
For burners of medium to high capacity
For intermittent operation (at least one controlled shutdown every 24 hours)
Can be universally used with multistage or modulating burners
Suited for use with stationary air heaters (WLE)
The flame supervision is ensured via a Photoresistive detectors QRB，blue-flame
detectors QRC1 or Silicon photocell detectors RAR9.
LAL1 - Yellow- and blue-flame burners without air pressure supervision
LAL2 - Yellow-flame burners with air pressure supervision
LAL3.25 - For special applications, e.g. burners of incinerator plant
(for details, refer to «Type summary» and «Notes»)

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Supplementary documentation
Product type Type of documentation Documentation number
LOK16 (For burner controls used in
connection with burners for continuous
operation)
Data Sheet N7785
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
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»
Press the lockout reset button only manually (applying a force of no more than 10
N), without using any tools or pointed objects
Do not press the lockout reset button on the unit or the remote reset button (input
21) for more than 10 seconds since this will damage the lockout relay in the unit
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
For safety reasons – self-test of the flame supervision circuit, etc. – at least one
controlled shutdown must take place every 24 hours
Mounting notes
Ensure that the relevant safety regulations are complied with
Connect the earthing lug inside the terminal base to burner ground using a screw
with a lockwasher

Note!
In applications involving air heaters (WLE), or in the case of oil burners with a
maximum throughput of >30 kW/h, removing wire link Bis not permitted.
Installation notes
Always run high-voltage ignition cables separately, with the greatest possible
distance to the unit and to other cables
Live and neutral conductors must not be mixed up
Install switches, fuses, earthing, etc., in compliance with local regulations
Make certain that the maximum permissible current rating of the connection
terminals will not be exceeded
The insulation on internal wiring which is subjected to the mains voltage must
withstand the electrical stress occurring during correct use

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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
Observe the permissible cable lengths (refer to «Technical data»)
Commissioning notes
When commissioning the plant or when doing maintenance work, make the following
safety checks:
Safety check to be carried out 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 40 seconds at the latest
c) With wire strap «B»:
Simulation of loss of flame during operation. For that
purpose, darken the flame detector during operation
and maintain that state
Lockout
d) Without wire strap «B»:
Simulation of loss of flame during operation. For that
purpose, darken the flame detector during operation
and maintain that state
Repetition followed by lockout at the end of «TSA»
e) Burner startup with response of air pressure switch Prevention of startup/lockout during prepurge time
f) Burner operation with simulated air pressure failure Immediate lockout
Engineering notes
Install switches, fuses, earthing, etc., in compliance with local regulations
Connect valves and other plant components as specified in the burner
manufacturer’s documentation
H
N
L
EK2
AL
211 2
1(3)
3
R
4 5 67
BV2
BV1
Z
SA
15 16 17 18
az
2019 9
LR
7153a03/0814
24
m
LK
11 10 822
B
vLP
141213 23
LAL2
12 3 4 5 6 7 8 9 10
QRB...
22
24
+
RAR...
SB
W
Si

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Engineering notes (cont’d)
Connect safety limit thermostats (manual reset) in the line (e.g. «SB»)
Remote reset
When connecting lockout reset button «EK2» between terminals 21 and
- terminal 3: For remote reset only
- terminal 1: For remote reset and remote emergency shutdown
With LAL1…: Required switching capacity of
- switching devices connected between terminals 4 and 5 (refer to «Technical data»)
With LAL2 / LAL3: Required switching capacity of
- switching devices connected between terminal 12 and «LP» (refer to «Technical data»)
- «LP» (refer to «Technical data»)
When using series connection, the control contacts of other devices contained in the burner plant must be
connected as follows:
- to terminal 4 or 5 contacts that must be closed from startup to controlled shutdown otherwise no startup
or shutdown
- to terminal 12 (not with LAL1) contacts that must only be closed on startup otherwise no startup
- to terminal 14 (not with LAL1) contacts that must be closed no later than at the beginning of short
preignition or long preignition and that must remain closed until controlled shutdown occurs
otherwise lockout
Maximum current draw, refer to «Technical data»
«Z» connected to terminal 15 short and long preignition
For use in applications with short preignition, the oil supply must be equipped with two shutoff valves
connected in series.
Observe the following:
EN 298:2012, Section 7.101.3.3 Prepurge time for oil burner control systems and the corresponding
application standards.
Connection of «BVx» to terminal 20, refer to «Connection examples»
When using burners without air damper, or with an air damper not controlled and monitored by the LAL…,
terminal 8 must be connected to terminal 6
Wire link «B» clearly marked on the underside of the LAL…
When wire link «B» is fitted, the LAL initiates lockout if loss of flame occurs during operation. For repetition of
the startup sequence, wire link «B» on the plug-in section of the LAL must be cut away. Just cutting is not
permitted!

Note!
In applications involving air heaters (WLE), or in the case of oil burners with a maximum throughput
of >30 kW/h, removing wire link Bis not permitted.
For the permissible lengths and laying of detector cables, refer to «Flame supervision»

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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 LAL and the AGM 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
Certified with plug-in base and flame detector:
Type
Only with QRB
LAL1.25 ●●●●●●--- ---
LAL2.14 ●●●●●●●---
LAL2.25 ●●●●●●●●
LAL2.65 ●●●●●●●---
LAL3.25 ●●●--- ●●●●

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Life cycle
Burner controls LAL 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 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
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
Plug-in design
Exchangeable unit fuse (including spare fuse)
Difference to LAL1 / LAL2:
Extraneous light does not initiate lockout, during burner off times or during the
prepurge time
Extraneous light prevents burner startup
Made of impact-proof and heat-resistance black plastic
Lockout reset button with viewing window; located behind it:
– Lockout warning lamp
– Lockout indicator
- coupled to the spindle of the sequence switch
- visible in the transparent lockout reset button
- uses easy-to-remember symbols to indicate the type of fault and the point
in time lockout occurred
LAL
LAL3.25
Housing

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Type summary
The type references given below apply to the LAL without plug-in base and without flame detector. For ordering information for plug-in bases and other accessories, see Accessories.
Switching times are given in the order of the startup sequence, valid for 50 Hz mains frequency. At 60 Hz frequency, switching times are about 17 % shorter.
The type references apply to burner controls operating on AC 230 V, 50...60 Hz.
Article no. Type
Flame
supervision
with ...
A
ir pressure supervision
Semi-automatic startup No lockout Start prevention in extraneous light Flash steam gene
r
ators
Universal use Medium- or heavy-oil burners
Times in seconds
QRB QRC RAR9
t1 TSA t3 t3‘ t3n t4 t5 t6 t7 t8 t10 t11 t12 t13 t16 t20
BPZ:LAL1.25 LAL1.25 ³) ●●●22,5 5 2,5 From the
start ¹) 15 7,5 7,5 15 2,5 47 10 ²) Optional Optional 15 5 35
BPZ:LAL2.14 LAL2.14 ³) ●●●●●10 4 2 From the
start ¹) 10 8 4 10 2 30 6 Optional Optional 10 4 32
BPZ:LAL2.25 LAL2.25 ³) ●●●●●22,5 5 2,5 From the
start ¹) 15 7,5 7,5 15 2,5 47 10 ²) Optional Optional 15 5 35
BPZ:LAL2.65 LAL2.65 ³) ●●●●●66,5 5 2,5 From the
start ¹) 15 7,5 7,5 15 2,5 91 10 Optional Optional 15 5 12,5
BPZ:LAL3.25 LAL3.25 ³)4) ●●●●●●●22,5 5 2,5 From the
start ¹) 15 7,5 7,5 15 2,5 47 10 ²) Optional Optional 15 5 35
¹) With air pressure supervision: From the time the air pressure signal is received
²) Does not apply to LAL1
³) Available as AC 100...110 V versions; add type suffix «– 110 V» when ordering. Flame supervision only with QRB or RAR
4) Special applications such as incinerator plants
Legend of times
TSA Ignition safety time t7 Interval between start command and power at terminal 7 (start delay for fan motor «M2»)
t1 Prepurge time with air damper open t8 Duration of startup sequence (without running time «t11» and running time «t12»)
t3 Preignition time, short (ignition (Z) to terminal 16) t10 Only with LAL2 / LAL3: Interval from start to the beginning of the air pressure check
t3‘ Preignition time, long (ignition (Z) to terminal 15) t11 Air damper running time to the OPEN position
t3n Postignition time (ignition (Z) to terminal 15) t12 Air damper running time to the low-fire position MIN
t4 Interval between voltage at terminals 18 and 19 (fuel valve 1 (BV1) - fuel valve 2 (BV2)) t13 Permissible afterburn time
t5 Interval between power at terminals 19 and 20 (fuel valve 2 (BV2) - load controller) t16 Interval until OPEN command for the air damper is given
t6 Postpurge time (with fan motor «M2») t20 Not with all LAL: Interval to the self-shutdown of the sequence switch after startup

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Accessories (to be ordered separately)
Flame detectors Photoresistive detectors QRB
See Data Sheet N7714
Blue-flame detectors QRC1
See Data Sheet N7716
Frontal illumination:
Lateral illumination:
Silicon photocell detectors RAR9
See Data Sheet N7713
Actuators Actuator SQN3
See Data Sheet N7808
Accessories for medium-
capacity burner controls Plug-in base AGM410490500
Article no.: BPZ:AGM410490500
With Pg11 thread for cable entry glands
See Data Sheet N7230
Plug-in base AGM13.1
Article no.: BPZ:AGM13.1
With M16 thread for cable entry glands
See Data Sheet N7230
Others Coaxial cable RG62
Supplied by customer.

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Technical data
Mains voltage
With LAL1 / LAL2 / LAL3
AC 230 V –15 / +10 %
AC 100 V –15 %...AC 110 V +10 %
Mains frequency 50...60 Hz ±6 %
Unit fuse (built-in) T6.3H250V to DIN EN 60127
Primary fuse (external) Max. 10 A (slow)
Weight Approx. 1,000 g
Power consumption Approx. AC 3.5 VA
Mounting position Optional
Degree of protection IP40, when fitted, with the exception of the
connection area (terminal base)
Safety class II
Perm. input current at terminal 1 Max. 5 A continuously
(peaks of 20 A / 20 ms)
Perm. current rating of control terminals
3, 6, 7, 9...11 and 15...20
Max. 4 A continuously
(peaks of 20 A / 20 ms)
Required switching capacity of switching
devices
Between terminals 4 and 5
Between terminals 4 and 12
Between terminals 12 and «LP»
Between terminals 4 and 14
«LP»
1 A, AC 250 V
1 A, AC 250 V
1 A, AC 250 V
5 A (peaks of 20 A)
5 A
Permissible length of the standard detector
cable (laid separately)
See Technical data, section Flame
supervision
Capacity
Starting output (without fan)
Nominal output
Optional (with ignition < 120 kW)
Optional
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 -40...+60 °C
Humidity <95 % r.h.
Operation DIN EN 60721-3-3
Climatic conditions Class 3K5
Mechanical conditions Class 3M2
Temperature range -20...+60 °C
Humidity <95 % r.h.
Installation altitude Max. 2,000 m above sea level
Warning!
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 LAL
Environmental
conditions

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Technical data (cont´d)
LAL1 with LAL2 * / LAL3 * with
QRB QRC1 QRB RAR9
Min. detector current required at AC 230 V 95 µA 80 µA 8 µA 6,5 µA
Max. permissible detector current with no
flame
12 µA 12 µA 0.8 µA 0.7 µA
Max. detector current that can occur 160 µA 130 µA 35 µA 45 µA
Instrument’s +pole To terminal 23 To terminal 23 To terminal 22 To terminal 22
Length of detector cable
In the same cable as the
control lines
Max. 30 m --- Not
permitted
---
Separate cable in cable duct Max. 1000 m --- 20 m 30 m
3-core cable --- Max. 1 m --- ---
2-core cable for the detector line (bl, sw);
separate single-core cable for the live
conductor (br)
--- Max. 20 m --- ---
Shielded cable (e.g. RG62, shield insulated) --- --- 200 m RAR9: 100 m
Shield --- --- To terminal 23 ---
* To comply with requirement of EN 298 clause 8.5 «Surge immunity test», for cable lengths above
10 m appropriate filter elements would have to be used. Experience has shown that filters are
sometimes not necessary for normal operation even for cable lengths above 10 m.
Detector current measurement
7153v01/0814
2322
LAL1...
1
swbl br
µA DC
+
7153v05/1206
22
7153v02/0814
Flame supervision
Measuring circuit for
detector current
measurement

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Function
2-stage expanding flame burner Legend
BV... Fuel valve
FS Flame signal amplifier
LK Air damper
LR Load controller
M... Fan or burner motor
R Control thermostat or pressurestat
RV Modulating fuel valve
Z Ignition transformer
A Start command by «R»
B Operating position of burner
B-C Burner operation
C Controlled shutdown
C-D Sequence switch travels to start position «A», postpurging
D-A End of control sequence
t1 Prepurge time with air damper open
t3 Preignition time
t4 Interval fuel valve 1 (BV1) - fuel valve 2 (BV2) or fuel valve 1
(BV1) - load controller (LR)
t5 Interval between voltage at terminal 19 and terminal 20
t6 Postpurge time
t7 Interval between start command and power at terminal 7
t11 Air damper running time to the OPEN position
t12 Air damper running time to the low-fire position
t13 Permissible afterburn time
TSA Ignition safety time
FS
BV2
min.
LK 0...
M
R
100%
LR
BV1
M1
M2
Z
~
M
PR
T
t12
t4
t16 t5
ABCD
t11 t13
t6
t7 t1
t3 t3n
TSA
t3´
7153a09/0498
Modulating expanding flame burner
RLR
t5
t11 t12
t13
FS
min.
LK 0...
M100%
RV
A
BV1
M2
Z
~
M
PR
M1
T
t4
t3
t7 t1
TSA
B
t6
CD
7153a10/0498
The following features of the LAL afford a high level of safety:
Detector and flame simulation test are restarted on completion of the afterburn time
«t13». Open or not fully closed fuel valves immediately initiate lockout at the end of
afterburn time «t13». The test ends on completion of the prepurge time «t1» of the
next startup sequence
The correct functioning of the flame supervision circuit is automatically checked
during each burner startup sequence
The control contacts for the release of fuel are checked to ensure they have not
welded postpurge time «t6»
A built-in unit fuse protects the control contacts against overloads
General

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Function (cont´d)
Burner operation with or without postpurge
Fan motors with a current draw of up to 4 A can be connected directly starting
current max. 20 A (for max. 20 ms)
Separate control outputs for
– preignition from start command
– postignition until shortly before the burner startup sequence is completed
– short preignition with postignition up to the end of «TSA»
Separate control outputs for the actuator’s positioning directions «OPEN»,
«CLOSE» and «MIN»
Checked air damper operation to ensure prepurging with the nominal air volume
Checked positions:
- «CLOSED» or «MIN» on startup low-fire position
- «OPEN» at the beginning of prepurging
- «MIN» on completion of prepurging
If the actuator does not drive the air damper to the required position, the burner
startup sequence will be stopped
2 control outputs for the release of the second and third output stage or for load
control
When load control is enabled, the control outputs for the actuator will be
galvanically separated from the burner control’s control section
Connection facilities for
– remote lockout warning device
– remote reset
– remote emergency shutdown
In addition, with LAL2 / LAL3:
– possibility of air pressure supervision with functional test of the air pressure
monitor on startup
– possibility of semiautomatic burner startup
Flame detector and flame simulation test are made automatically during burner off
times and the prepurge time «t1»
If loss of flame occurs during operation, the burner control will initiate lockout
If automatic repetition of the startup sequence is required, the clearly marked wire
link on the plug-in section of the LAL must be cut away start repetition
Burner control is not in the lockout position
Sequence switch is in its start position
with LAL1, voltage is present at terminals 4 and 11
with LAL2 / LAL3, voltage is present at terminals 11 and 12
Air damper is closed
End switch «z» for the «CLOSED» position must feed power from terminal 11 to
terminal 8
Contact of the limit thermostat or pressure switch «W» and the contacts of any
other switching devices in the control loop between terminals 4 and 5 must be
closed e.g. a control contact for the oil preheaters temperature
Normally closed contact of the air pressure switch must be closed «LP» test.
Control of the burner
Flame supervision
Preconditions for
burner startup
With the exception of LAL1

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Startup sequence
A Start command by «R»
«R» closes the start control loop between terminals 4 and 5
The sequence switch starts to run
- Only prepurging, fan motor at terminal 6 receives power
- Pre- and postpurging, fan motor or flue gas fan at terminal 7 receives power on completion of «t7»
On completion of «t16», the control command for opening the air damper is delivered via terminal 9
Terminal 8 receives no power during the positioning time
The sequence switch continues to run only after the air damper has fully closed
t1 Prepurge time with air damper fully open
The correct functioning of the flame supervision circuit is checked during «t1»
The burner control will initiate lockout if correct functioning is not ensured
With LAL2 / LAL3:
Shortly after the beginning of «t1», the air pressure switch must change over from terminal 13 to terminal 14
otherwise, the burner control will initiate lockout
start of the air pressure check
t3 Short preignition time
«Z» must be connected to terminal 16, release of fuel via terminal 18.
For use in applications with short preignition, the oil supply must be equipped with two shutoff
valves connected in series.
Observe the following:
EN 298:2012, Section 7.101.3.3 Prepurge time for oil burner control systems and the
corresponding application standards.
t3´ Long preignition time
«Z» connected to terminal 15.
With LAL1
«Z» is switched on when start command is given.
With LAL2 / LAL3
«Z» is switched on when «LP» changes over.
no later than at the end of «t10»
On completion of «t1», the LAL drives the air damper to the low-fire position via terminal 10
the low-fire position is defined by the changeover point of auxiliary switch «m» in the actuator
During the positioning time, the sequence switch maintains its position
until terminal 8 receives power via «m»
The motor of the sequence switch is switched to the control section of the LAL
positioning signals delivered to terminals 8 now have no impact on the further startup sequence and
on subsequent burner operation
TSA Ignition safety time
On completion of «TSA», a flame signal must be present at terminal 22. It must be available until controlled
shutdown occurs
otherwise, the burner control will initiate lockout and lock itself in the lockout position
t3n Postignition time
«Z» must be connected to terminal 15
With short preignition, «Z» remains on until «TSA» has elapsed
connection to terminal 16

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Startup sequence (cont´d)
t4 Interval «BV1 – BV2» or «BV1 - LR»
On completion of «t4», voltage is present at terminal 19
The voltage is required to power «BV2» connected to auxiliary switch «v» in the actuator
t5 Interval
On completion of «t5», terminal 20 receives power. At the same time, control outputs 9 to 11 and input 8
are galvanically separated from the LAL’s control section
LAL is now protected against reverse voltages from the load control circuit
With the release of «LR» at terminal 20, the startup sequence of the LAL ends
After a few idle steps the sequence switch switches itself off. That is, the idle steps do not cause any
change in the contact position.
B Operating position of the burner
B-C Burner operation
During burner operation, «LR» drives the air damper to the nominal load or low-fire position, depending
on heat demand
Release of the nominal load takes place via auxiliary switch «v» in the actuator
In the event of loss of flame during operation, the LAL will initiate lockout
For automatic start repetition, the clearly marked wire link «B» on the plug-in section of the LAL must be
cut away
C Controlled shutdown
In the case of controlled shutdown, «BVx» will immediately be closed. At the same time, the sequence
switch is started to program «t6».
C-D Sequence switch travels to start position «A»
t6 Postpurge time
Fan «M2» connected to terminal 7
Shortly after the start of «t6», terminal 10 receives power
air damper is driven to the «MIN» position
Full closing of the air damper starts only shortly before «t6» has elapsed
initiated by the control signal at terminal 11
During the following burner off time, terminal 11 is live
t13 Permissible afterburn time
During «t13», the flame signal input may still receive a flame signal
no lockout
D-A End of control program
start position
As soon as the sequence switch has reached the start position – having thereby switched itself off – the
flame detector and flame simulation test will start again.
During burner off times, the flame supervision circuit is live.
When the start position is reached:
With LAL1, a voltage signals is fed to terminal 4
With LAL2 / LAL3, a voltage signal is fed to terminal 12

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Building Technologies Division CC1N7153en
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Control sequence under fault conditions and lockout indication
In case of any disturbance, the supply of fuel will immediately be interrupted.
Whenever a fault occurs, the sequence switch stops and with it the lockout indicator.
The symbol appearing above the reading mark indicates the type of fault:
No start One of the contacts is not closed (also refer to «Preconditions for burner startup»)
Extraneous light:
Lockout during or after completion of the control program
Examples:
– Nonextinguished flame
– Leaking fuel valves
– Faulty flame supervision circuit
=Interruption of
startup sequence
No «OPEN» signal at terminal 8 from the end switch «a»
Terminals 6, 7 and 15 are live until fault has been corrected
P Lockout Does not apply to LAL1:
No air pressure indication at the beginning of the air pressure check
Air pressure failure after the air pressure check
Lockout Defect in the flame supervision circuit
>Interruption of
startup sequence
No positioning signal at terminal 8 from the auxiliary switch «m» for the low-fire
position
Terminals 6, 7 and 15 are live until fault has been corrected
1 Lockout No flame signal at the end of the safety time «TSA»
I Lockout Flame signal has been lost during operation
After the lockout reset, the burner control sequence switch first returns to the start
position and then initiates a burner restart.
If lockout occurs any other moment in time between start and preignition not indicated
by a symbol, the usual cause is a premature flame signal, that is, a faulty flame signal
caused, for instance, by extraneous light.
a-b Startup sequence
b-b´ Idle steps
(with no contact confirmation)
b (b´)-a Postpurge program
LAL1 LAL2, LAL3
Burner control can immediately be reset after lockout:
– Do not press the lockout reset button for more than 10 seconds
The sequence switch always travels to the start position first
– After resetting
– After rectification of a fault that led to shutdown
– After each power failure
During this period of time, power is only fed to terminals 7 and 9...11.
Then, the burner control will program a new burner startup sequence
Note!
Do not press the lockout reset button for more than 10 seconds.
Lockout indicator

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Building Technologies Division CC1N7153en
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Connection diagrams (for variants, refer to «Connection examples»)
LAL1
H
N
t3n
t3´
C
D
A
L
EK2
AL
21
1
AS
2
1(3)
3
W
R
4 5 6 7
t6
B
A
t7
BV2
BV1
Z
SA
15 16 17 18
az
M
2019 9
LR
t4
t3
TSA
t5 t1
t12
t16
t11
a
z
23
m
11 10 822
B
t13
1
v
7153a01/0814
LK
Si
QRB...
sw
bl br
QRC1...
23
22
1
SB
M1 M2

Note!
In applications involving air heaters (WLE), or in the case of oil burners with a
maximum throughput of > 30 kW/h, removing wire link Bis not permitted.
Caution!
Do not press lockout reset button (EKx) for more than 10 seconds!

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Building Technologies Division CC1N7153en
21.09.2016
Connection diagrams (for variants, refer to «Connection examples») (cont’d)
LAL2 / LAL3
H
N
t3n
t3´
C
D
A
L
EK2
AL
21
1
AS
2
1(3)
3
R
4 5 6 7
t6
B
A
t7
BV2
BV1
Z
SA
15 16 17 18
az
M
2019 9
LR
t4
t3
TSA
t5 t1
t12
t16
t11
a
z
7153a02/0814
m
LK
11 10 822
B
t13
1
vLP
141213
t10
P
23
Si
QRB...
SB
M1 M2
W
2422
+
RAR...
Caution!
Do not press lockout reset button (EKx) for more than 10 seconds!

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Building Technologies Division CC1N7153en
21.09.2016
Connection diagrams (for variants, refer to «Connection examples»)
5
a
L1
IV VI
XIV
ar2
22
23
1823 1 (3)
LK
23
L
ab
ab
aab
3
baab
a
ba
V
9
v
ab
b
b
22 23 24
22
23 24
SB
Warning!
Do not press the lockout reset button «EKx» for more than 10 seconds!
For the connection of the safety shutoff valve, refer to the plant diagram
provided by the burner supplier.
LAL1
LAL2 / LAL3

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Building Technologies Division CC1N7153en
21.09.2016
Sequence diagram
At11
t7
t1 t12
t4
t3
t3n
BC D
t6
t3´
TSA
t5
t20
t13t10*
t16
t8
Positions of lockout indication
Control output
at terminal:
P1
*
20
4
7
19
8
17
15
9
9
10
*
I
II
III
IV
V
VI
VII
VIII
IX
X
XI
XII
XIII
XIV
a
b
a
b
a
b
a
b
a
b
a
b
a
b
a
b
a
b
a
b
a
b
7153d01e/0404
12
16
11
18
XV a
b
* These data do not apply to LAL1

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Building Technologies Division CC1N7153en
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Connection examples
Connection of actuators without end
switch for the «CLOSED» position
19 20 911 10 8
LR
SA az
MLK
BV2
N
v
7153a11/0498
«z» adjusted for low-fire air volume.
Control of actuator during operation
by control signals fed to terminal 17
18 19 17 9 20 11 10 86
LR
N
BV1 BV2 LK 7153a12/0498
For signal path, refer to «Connection
diagrams».
Control of «BVx» via terminal 20 19 20 911
10 86
NBV2 BV3
7153a14/0498
Relay is not required if «BV3» at
terminal 20 is hydraulically series-
connected with «BV2».
«BV2» is controlled by terminal 18 or
19.
Burner with no air damper or
with air damper not controlled
by the LAL…
Wiring required with LAL2 for
operation with no air pressure
supervision
13 12 14 45 6
R
W
d1
NM
7
7153a15/1001
If an auxiliary contact «d1» of the fan
contactor is included in the circuit as
shown in the diagram, ignition and
release of fuel take place only when
the contact is closed.
Semiautomatic startup 312 13 14 45
AL IW
N
L3 LP
0
7153a16/0498
The burner is switched on manually
by pressing the «I» button.
Then, the LAL programs startup and
flame supervision.
Burner shutdown is also made
manually by pressing the «0» button,
or automatically when limit thermostat
or pressure switch «W» responds.
«L3» indicates when the burner is
ready for startup. It extinguishes
shortly after the burner is started up.
For other connections, refer to
«Connection diagrams».