Control Sequence - Siemens LMO14 Series Manual

Connection diagram and internal diagram
EK1 µC1 µC control
LED
K1 K2
K3
2 10 8 3
1
kbr
SB
8 3
R
OW
W
OH
AL
N
Si
L
N
7130a01e/0700

Control sequence

A´ A
R
W
SB
tw
OH
OW
M
BV1
t1
Z
t3
FS
Only with LMO14.113A2: re-ignition
Z
FS
7130d02e/0700
AL Alarm device
Legend
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
t3 Pre-ignition time
t3n Post-ignition time
A´ Beginning of start-up sequence with burners using an oil pre-
heater
A Beginning of start-up sequence with burners using no oil pre-
heater
Control signals
Required input signals
Siemens Building Technologies
Landis & Staefa Division
LMO14...
µC2
6 4 5 9
7
EK2
1
Z BV1
M
LMO14...
B C
t3n
TSA
t3n t3n
EK1
LED
FSV
K3
11 12
2 10
1
SB
QRB
R
W
AL
QRC
bl sw
Si
br
L
N
7130a02e/0700
D
A´
R
1
W
SB
tw
8 OH
3 OW
3 M
BV1
4
6 BV2
11
Z
12
FS
6
Only with LMO24.113A2: re-ignition
11
Z
12
FS
OH
QRB
QRC
R
SB
Si
W
Z
t4
TSA
tw
B
C
D
µC1
µC2
LMO24... / LMO44...
µC control
µC2
µC1
K2
K1
8 3 6 4
7
kbr
3
8
OW
BV2
OH
N
Z BV1
M
LMO24... / LMO44...
A B
t3n
t1
t3 TSA
t3n t3n
7130d03e/0700
Oil pre-heater
Photoresistive detector
Blue-flame detector
bl = blue
br = brown
sw = black
Control thermostat or pressurestat
Safety limit thermostat
External primary fuse
Limit thermostat or pressure switch
Ignition transformer
Interval from flame signal to release «BV2»
Ignition safety time
Waiting time for oil pre-heating
Time of flame establishment
Operating position
Controlled shut-down by «R»
Microcontroller 1
Microcontroller 2
FSV
K4
5 9 11 12
QRB
EK2
QRC
1 bl sw
br
C
D
1
8
3
3
4
5
6
11
12
6
11
12
9/10
CC1N7130en
31.07.2000