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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).
Connection diagram and internal diagram
µC cont r ol
µC 1
EK1
LED
K2
K1
K3
2
8
3
1
10
kbr
SB
3
8
R
O W
W
O H
AL
N
Si
L
N
7130a02e/ 0700
Control sequence
A ´
A
R
W
SB
t w
O H
O W
M
BV1
BV2
t 1
Z
t 3
FS
Z
FS
7130d03e/ 0700
28
µC 2
K4
4
5
6
7
9
EK2
BV2
1
Z
BV1
M
B
C
t 3n
TSA
t 3n
t 3n
APPENDIX: COMPONENTS CHARACTERISTICS
Key
AL
Alarm device
kbr... Cable link (required only when no oil pre-heater is used)
BV... Fuel valve
EK1 Lock-out reset button
EK2 Remote lock-out reset button
FS
Flame signal
FSV Flame signal amplifier
K...
Contacts of control relay
LED 3-colour signal lamps
M
Burner motor
OW
Release contact of oil pre-heater
t1
Pre-purge time
FSV
t3
Pre-ignition time
t3n
Post-ignition time
A´
Beginning of start-up sequence with burners using an oil pre-
11
12
heater
A
Beginning of start-up sequence with burners using no oil pre-
heater
Q R B
Controller output signals
Required input signals
OH
Oil pre-heater
Q R C
QRB Photoresistive detector
bl
sw
br
QRC Blue-flame detector
bl = blue
br = brown
sw = black
R
Control thermostat or pressurestat
D
1
SB
Safety limit thermostat
Si
External primary fuse
8
W
Limit thermostat or pressure switch
3
Z
Ignition transformer
t4
Interval from flame signal to release «BV2»
3
TSA Ignition safety time
tw
Waiting time for oil pre-heating
4
B
Time of flame establishment
5
C
Operating position
D
Controlled shut-down by «R»
6
µC1 Microcontroller 1
11
µC2 Microcontroller 2
12
6
11
12
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