No i problem rozwiązany. U mnie problem polegał na tym, że po podaniu napięcia przez ogrzewacz oleju na styk 3 sterownika, elektromagnes przyciągał i nie puszczał. Przez to styk, który oznaczyłem na zdjęciu numerem 2, opierał się tylko o ten biały haczyk i ponieważ nie było odcinane napięcie na cewce bimetalu, po chwili wyskakiwał błąd. Elektromagnes się kleił, bo między nim a blaszką, którą on przyciąga, nie było nic a powinien być taki kawałek elastycznego materiału (stanowił przekładkę). Podkleiłem tam taśmę izolacyjną i zadziałało jak powinno: po otrzymaniu sygnału z podgrzewacza elektromagnes tylko raz pstryknie i po około sekundzie puszcza. W tym czasie bimetal nagrzewa się i ten styk z oczkiem przechodzi w takie położenie, żeby haczyk z elektromagnesu go mógł zahaczyć. Jednocześnie w tym właśnie położeniu podawane jest napięcie na zawór oleju i piec odpala. Wtedy ten elektromagnes załączany jest na stałe poprzez fotodiodę (zmierzyłem, że wystarczy ok 1 kΩ). Bimetal się chłodzi i po powrocie do nominalnej pozycji rozłącza iskrownik. Potem okazało się, że znalazłem ten kawałek materiału na podłodze koło pieca i go włożyłem zamiast taśmy izolacyjnej. Facet, który dokonywał ostatnio regulacji, stwierdził że zbyt długo piec nie odpala, więc ręcznie uruchamiał go wtykając śrubokręt między elektromagnes. Widocznie za którymś razem zbyt mocno odgiął blaszkę elektromagnesu i ten materiał wypadł. Piec odpalał zbyt długo, bo faktycznie trochę dłużej trzeba czekać na napięcie z podgrzewacza, ale facetowi było zbyt długo. Stwierdził, że przyczyną tego jest sterownik i trzeba kupić nowy. http://obrazki.elektroda.net/17_1290550010_thumb.jpg Dziękuję wszystkim, którzy próbowali pomóc. Naprowadziliście mnie na rozwiązanie. Temat można zamknąć. @zyzy52, styk 3 i 8 mogę ręcznie zewrzeć dla próby bo to tak, jakby podgrzewacz się dostatecznie ogrzał. Tylko trzeba pamiętać, żeby rozewrzeć po 14 sekundach bo inaczej bimetal będzie się dalej nagrzewał i wyskoczy błąd. Oczywiście żeby wszystko działało po rozwarciu styków 3 i 8 zanim bimetal ostygnie, należy podać sygnał z fotodiody, bo inaczej wszystko się wyłączy ;) A teraz znalazłem schemat dokładnie tego sterownika i program jego pracy. Załączam plik, może się komuś przyda. W pliku schematy opisy, specyfikacje techniczne a nawet rysunki techniczne i programy pracy sterowników landis: LOA21.171B273 LOA21.171B173 LOA21.173A273 LOA28.173A271 LOA22.171B273 LOA22.171B173 LOA24.171B272 LOA24.171B172 LOA24.173A27 LOA24.174A27 LOA26.171B272 LOA36.171A27 LOA24.571C27 LOA25.173C271 LOA25.173C171
7
ISO 9001
118
LOA2...
LOA3...
Oil Burner Controls
for single- or two-stage pressure-jet burners
with intermittent operation 1)
LOA2...
LOA3...
Burner controls for automatic startup, control and supervision of pressure-jet oil
burners with an oil throughput of up to 30 kg / h.
The burner controls are tested to EN 230 and CE-certified in compliance with the
directives for electromagnetic compatibility.
The LOA2... / LOA3... and this data sheet are intended for use by OEMs that
integrate the burner controls in their products!
Mechanical design
Ordering
The burner controls are of plug-in design. The casing is made of impact-proof and heatresistant plastic and accommodates the
– thermal-electric sequence switch which acts on a multiple snap-action switching
system
– flame signal amplifier with the flame relay
– lockout reset button with integrated fault indication lamp
Burner control
refer to table overleaf
Flame detectors
– Photo-resistive detectors QRB1...
– Blue-flame detectors QRC1...
refer to data sheet 7714
refer to data sheet 7716
Plug-in base, without cable gland holder or without cable holder
– With screw terminals
Plug-in base, for clip connection 2)
– Clipses (single pieces in lots of 100) 2)
– Clipses (10,000 pieces on strap) 2)
– Mounting tool 2)
– Removal tool 2)
AGK11
AGK12
AGK 4 408 5625 0
AGK 4 408 5626 0
KF8883
KF8884
Cable gland holder for 5 x Pg11, for insertion in plug-in base
AGK65
Cable holder, for insertion in plug-in base and introduction of cable
AGK66
Spacer (empty casing), to increase the overall height of LOA...types to LAB / LAI height
AGK21
Adapter, for replacing LAB1 / LAI... by LOA...
(rewiring of plug-in base not required)
KF8819
Service adapter, with signal lamps for making a functional check
and with jacks for making detector current measurements
KF8833
Remote reset module for use with LOA26... / LOA36...
(printed circuit board)
ARK21A27
1)
2)
Landis & Staefa
For safety reasons (self-test of flame supervision circuit, etc.), at least one controlled shutdown
must take place every 24 hours
On request only
CC1N7118E
December 10, 1997
1/13
Type summary
Version
The type references given in the table apply to burner controls without base and without
flame detector.
Voltage
(VAC)
Type reference
Undervoltage
detection
CE
t1
(s)
t3
(s)
t2 max.
(s)
t3n
(s)
t3n’
(s)
t4
(s)
Replacement for:
Without bridging contact for the release contact of the oil pre-heater
220
Standard
version
LOA21.171B273))
–
–
13
13
10
15
–
15
LAB1,
110
LOA21.171B173)
–
–
13
13
10
15
–
15
LAI1, LAI2
220
LOA21.173A273)
–
–
13
13
10
20
2
20
LAI2.2, LAI4
13
13
10
2
–
15
–
LOA28.173A271)
220
x
–
With bridging contact (fr**) for the release contact of the oil pre-heater
220
LOA22.171B273)
–
–
13
13
10
15
–
15
LAI2.3
110
LOA22.171B173)
–
–
13
13
10
15
–
15
LAI2.3
220
LOA24.171B272)
x
x
13
13
10
15
–
15
LAI2.3
110
LOA24.171B172)
x
x
13
13
10
15
–
15
–
220
LOA24.173A27
x
x
13
13
10
20
2
20
LAI2.3
220
LOA24.174A27
x
x
13
13
10
35
2
35
–
With remote
reset facility
220
LOA26.171B272)
x
x
13
13
10
15
–
15
–
220
LOA36.171A27
x
x
13
13
10
15
–
15
–
For flash-steam
generators
220
LOA24.571C27
x
x
6
6
10
20
–
20
LAI5
For incinerator
plants or
similar
220
LOA25.173C271)
x
–
13
13
10
2
–
15
LAB2
110
LOA25.173C171)
x
–
13
13
10
2
–
15
LAB2
Standard
version
1) LOA25... and LOA28... can only be used with photo-resistive detectors QRB1...
Since LOA25... and LOA28... do not feature extraneous light lockout, they do not conform to EN 230
2) It is also possible to use an infrared flicker detector IRD1010 (refer to data sheet 7120)
3) Since LOA21... and LOA22... do not feature undervoltage detection, they do not conform to EN 230
Legend
t1
Pre-purge time
t3
t3n’
Pre-ignition time
Short post-ignition time
Beginning of startup sequence with burners
using an oil pre-heater «OH»
Beginning of startup sequence with burners
using no oil pre-heater
M
Burner motor
K
B
C
D
Time of flame establishment
Running position
Controlled shutdown by «R»
OH
OW
QRB
QRC
Catch of flame relay for locking contact
«tz1» in the case of premature flame
signals or for locking this contact when
flame signal is correct
Oil pre-heater
Release contact of «OH»
Photo-resistive detector
Blue-flame detector
AL
BV
EK1
EK2
FR
fr**
FS
LED1
L1
L2
Times
tw
Alarm device
Fuel valve
Lockout reset button
Remote lockout reset button
Flame relay
Bridging contact for release contact of «OH»
Flame signal
Indication of flame strength (green)
Indication of faults (red)
Indication of operation (orange)
t2
t3n
t4
Functions and components
Heating up time of «OH» until contact «OW»
delivers a signal
Safety time
Long post-ignition time
Interval from establishment of flame to release
of the 2nd fuel valve
Burner control output signals
Required input signals
A’
A
2/13
CC1N7118E
December 10, 1997
bl = blue
R
SA
Si
TZ
tz...
V
W
Z
br = brown
sw = black
Control thermostat or pressurestat
Actuator with automatic setback
External pre-fuse
Thermal-electric sequence switch
Contacts of «TZ»
Flame signal amplifier
Limit thermostat or pressure monitor
Ignition transformer
Landis & Staefa
Connection diagram,
control sequence
LOA21.171B27
LOA21.171B17
LOA22.171B27
LOA22.171B17
LOA24.171B27
LOA24.171B17
LOA24.571C27
fr** Not provided with the LOA21...
LOA22.171B27 / LOA22.171B17 / LOA24.171B27
LOA24.171B17 / LOA24.571C27
LOA21.171B27 / LOA21.171B17
These types of LOA… may not be used with blue-flame detectors QRC...
LOA25.173C27
LOA25.173C17
LOA28.173A27
fr** Not provided with the LOA28.173A27
LOA25.173C27 / LOA25.173C17
LOA28.173A27
Landis & Staefa
CC1N7118E
December 10, 1997
3/13
Connection diagram,
control sequence
LOA21.173A27
LOA24.173A27
LOA24.174A27
fr** Not provided with the LOA21...
LOA24.173A27 / LOA24.174A27
LOA21.173A27
With remote reset
module ARK21:
LOA26.171B27
LOA36.171A27
4/13
CC1N7118E
December 10, 1997
Landis & Staefa
Internal diagram
LOA21.171B27
LOA21.171B17
LOA22.171B27
LOA22.171B17
LOA24.171B27
LOA24.171B17
LOA24.571C27
fr** Not provided with the LOA21...
LOA25.173C27
LOA25.173C17
LOA28.173A27
fr** Not provided with the LOA28...
LOA21.173A27
LOA24.173A27
LOA24.174A27
fr** Not provided with the LOA21...
Landis & Staefa
CC1N7118E
December 10, 1997
5/13
Internal diagram
LOA26.171B27
LOA36.171A27
6/13
CC1N7118E
December 10, 1997
Landis & Staefa
Control sequence in
the event of faults
Whenever a fault occurs, the supply of fuel is immediately interrupted.
Extraneous light /
premature flame signal
During the pre-purge time, no flame signal may be present.
If, however, a signal is delivered during this period of time, the LOA… locks out on expiry
of the pre-purge and safety time. Under these circumstances, the oil valve does not
open.
With every lockout, the control outputs will be de-energized in less than one second,
while terminal 10 (AL) for the remote indication of lockout receives voltage.
The LOA… can be reset no earlier than 50 seconds after lockout.
An erroneous flame signal can be caused, for instance, by
– premature establishment of flame due to a leaking oil valve
– extraneous light
– a short-circuit in the detector or its wiring
– faults in the flame signal amplifier, or similar
Exception: with the LOA25… and LOA28…, there will be no lockout, but burner startup
will be prevented until the premature flame signal is no longer present.
This means that LOA25… and LOA28… may be used only where the requirements of
EN 230 need not be met.
Non-appearance of
flame
If, at the end of the safety time, there is no flame signal, the LOA… will immediately
lock out.
If, with the LOA25… and LOA28…, there are flame signal failures of short duration
during the safety time «t2» and the interval «t4», the ignition transformer will immediately
be switched on again.
The total duration of the repeated ignition attempts equals the safety time «t2»
(10 seconds).
Flame failure during
operation
On flame failure during operation, the LOA… will immediately shut down the fuel
supply and automatically recycle (restart attempts).
If flame failure occurs on completion of «t4», almost the complete startup sequence
will be restarted.
Undervoltage detection
With burner controls featuring undervoltage detection, an additional electronic circuit
ensures that in the event of mains voltages below about 165 V, burner startup will be
prevented, or - without opening the oil valve - the burner control locks out.
Indications
Fault position
The fault position is indicated by the lamp integrated in the reset button.
Flame strength
Only with the LOA36...
The green LED for indication of the flame strength is used for checking the flame signal.
To ensure reliable burner operation, this LED must be lit.
If, during burner operation, the green LED flickers or extinguishes, the light conditions at
the burner are inadequate, caused by dirt, for instance.
Operation
Only with the LOA36...
If the contact of the control thermostat «R» is closed, the orange LED is lit, thus indicating
the start of the oil pre-heater's heating up phase (if fitted).
Landis & Staefa
CC1N7118E
December 10, 1997
7/13
Technical data
Burner control
Mains voltage
Mains frequency
External pre-fuse (Si)
Input current to
- terminal 1
- terminal 3
AC 220 V -15 %...240 V +10 %
AC 100 V -15 %...110 V +10 %
50 Hz -6 %...60 Hz +6 %
10 A, fast
5 A (short-term 15 A during 0.5 s)
5 A (excl. burner motor and oil preheater)
Permissible loading of terminals
LOA21.171B27
LOA21.171B17
LOA22.171B27
LOA22.171B17
LOA24.171B27
LOA24.171B17
LOA24.571C27
LOA25.173C27
LOA25.173C17
LOA28.173A27
- Terminal 4
- Terminal 5
- Terminal 6
- Terminal 7
- Terminal 8
- Terminal 10
1A
1A
2A
2A
5A
1A
LOA21.173A27
LOA24.173A27
LOA24.174A27
- Terminal 4
- Terminal 5
- Terminal 6
- Terminal 7
- Terminal 8
- Terminal 10
1A
1A
2A
1.5 A
5A
1A
LOA26.171B27
LOA36.171A27
- Terminal 4
- Terminal 5
- Terminal 6
- Terminal 7
- Terminal 8
- Terminal 10
1A
1A
2A
0.1 A
5A
1A
Environmental conditions
Condensation, formation of ice and ingress of water are not permitted.
• Transport
– Climatic conditions
- Temperature range
- Humidity
- Mechanical conditions
IEC 721-3-2
class 2K2
-50...+60 °C
& lt; 95 % r.h.
class 2M2
• Operation
– Climatic conditions
- Temperature range
- Humidity
IEC 721-3-3
class 3K5
-20...+60 °C
& lt; 95 % r.h.
Power consumption
approx. 3 VA
Degree of protection of housing
IP40
Mounting position
optional
Weight
- Burner control
- Base
- Cable gland holder
180 g
80 g
12 g
Indication of flame strength (only with LOA36...)
- Min. detector current LED lit with QRB...
60 µA ±15 %
- Min. detector current LED lit with QRC...
40 µA ±15 %
CE conformity
8/13
CC1N7118E
to the directives of the EC
89 / 336 EEC incl. 92 / 31 EEC
and 73 / 23 EEC
December 10, 1997
Landis & Staefa
Flame detectors
For measurement circuits and lengths of detector cables, refer to data sheets 7714 (QRB…)
and 7716 (QRC…).
At AC 230 V or AC 110 V mains voltage
QRB...
QRB… detector current (typical)
Burner control
Minimum required
(with flame
present)
Maximum
permitted
(without flame)
Maximum possible
(with flame
present)
70 µA
5.5 µA
210 µA
45 µA
5.5 µA
45 µA
70 µA
5.5 µA
900 µA
LOA21.171B27
LOA21.171B17
LOA22.171B27
LOA22.171B17
LOA24.171B27
LOA24.171B17
LOA24.571C27
LOA25.173C27
LOA25.173C17
LOA26.171B27
LOA28.173A27
LOA21.173A27
LOA24.173A27
LOA24.174A27
LOA36.171A27
QRC1A...C27
QRC… detector current (typical)
Burner control
Minimum required
(with flame
present)
Maximum
permitted
(without flame)
Maximum possible
(with flame
present)
70 µA
5.5 µA
110 µA
LOA21.171B27
LOA21.171B17
LOA22.171B27
LOA22.171B17
90 µA at AC 110 V
LOA24.171B27
LOA24.171B17
LOA24.571C27
LOA26.171B27
LOA25.173C27
LOA25.173C17
—
—
—
45 µA
5.5 µA
45 µA
70 µA
5.5 µA
110 µA
LOA28.173A27
LOA21.173A27
LOA24.173A27
LOA24.174A27
LOA36.171A27
Landis & Staefa
CC1N7118E
December 10, 1997
9/13
10/13
CC1N7118E
December 10, 1997
Landis & Staefa
Safety notes
Non-observance of the following safety notes may lead to
unforeseen detrimental consequences, such as electric shock,
explosion, environmental damage, etc.
• In the geographical areas where DIN standards are in use, the
installation must be in compliance with VDE requirements, particularly
with the standards DIN / VDE 0100 and 0722!
In all other areas in compliance with the national and local standards
and regulations.
• All regulations and standards applicable to the particular application
must be observed!
• Installation and commissioning work must always be carried out by
qualified personnel!
• Ignition cables must always be laid separately, maintaining the greatest
possible distance to the unit and other cables!
• Observe the notes on the laying of detector cables (refer to «Flame
detectors»)!
• Check wiring carefully before putting the burner control into operation!
• LOA... are safety devices. It is therefore not permitted to open, interfere
with or modify the units!
• The LOA... must be completely isolated from the mains before
performing any work on it!
• Check all safety functions when putting the burner control into
operation or after performing service work!
• Ensure protection against electric shock on the unit itself and on all
electrical connections through appropriate mounting!
• Electromagnetic emissions must be checked from an application point
of view!
• Always press reset button manually without using any tools or sharpedged objects!
Accessories
Adapters
KF8833
KF8819
For description of adapters, refer to «Ordering».
Landis & Staefa
CC1N7118E
December 10, 1997
11/13
12/13
CC1N7118E
December 10, 1997
Landis & Staefa
Dimensions
Dimensions in mm
Burner controls
Plug-in bases
AGK11
AGK12
Plug-in base with screw terminals. Hatched: position of
insertable cable gland holder or cable holder
«B»: holes for cable entry
«31», «32»: auxiliary terminals. «N»: neutral terminals,
connected to neutral input (terminal 2)
Bottom: 4 earth terminals, joining a lug
for earthing the burner
Plug-in base for clip connections. Hatched: position of
insertable cable gland holder or cable holder
«B»: holes for cable entry from below
Connection choices:
1, 3 and 4 each max. 4 clips Earthing: total of 6 clips,
2
max. 8 clips connected to lug «C»
5 through 10 each max. 3 clips for earthing the burner
11, 12 each
max. 4 clips
31, 32 each
max. 2 clips
The two narrow sides of the base are provided with catches which engage in the casing when the
latter is plugged in. To disengage the catches, a screwdriver must be slightly tilted in the appropriate
guiding slots.
Mandatory ( AGK11 and AGK12 ): connection of earthing lug «C» and of fixing screws in «A»
to the ground of the burner (using a metric screw with lockwasher or similar).
Remote reset module
ARK21A27
ARK21A27
Remote reset module for use with LOA26... / LOA36...
(printed circuit board with no housing).
Degree of protection IP00, that is, protection against
electric shock hazard must be ensured through
mounting.
Do not place any metal objects in the hatched area.
The module must be fitted with the help of spacers
made of plastic. Do not use spacers made of metal!
© 1997 Landis & Staefa Produktion (Deutschland) GmbH
Landis & Staefa
CC1N7118E
December 10, 1997
13/13