Siemens LMO14 Series Manual page 11

Connection diagram and internal diagram LMO14...
EK1 µC control
µC1
LED
K1 K2
K3
2 8
1 10
kbr
SB
8
R
OW
W
OH
AL
N
Si
L
N
7130a01e/0700
Connection diagram and internal diagram
LMO24.../LMO44...
µC control
µC1
EK1
LED
K2
K1
K3
2 10 8
1
kbr
SB
8 3
R
OW
W
OH
AL
N
Si
L
N
7130a02e/0700
AL Alarm device
Legend
BV... Fuel valve
EK1 Lockout reset button
EK2 Remote lockout reset button
FS Flame signal
FSV Flame signal amplifier
K... Contacts of control relay
kbr... Cable link (required only when no oil preheater is used)
LED 3-color signal lamp
M Burner motor
TSA Ignition safety time
tw Waiting time
t1 Prepurge time
t1´ Purge time
A´ Start of startup sequence with burners using an
A Start of startup sequence with burners using no
B Time of flame establishment
Control signals
Required input signals
Perm. input signals
Siemens Building Technologies
HVAC Products
µC2
3 4 5
6 7 9
3
M Z BV1
µC2
K4
3 6 4 5 9
7
EK2
BV2
Z BV1
M
A´
R
W
SB
OH
FSV
OW
M
11 12
BV1
Z
QRB
EK2
FS
Only with LMO14.113B2: re-ignition
QRC
1
bl sw
Z
br
FS
Control sequence LMO24... / LMO44...
A´
R
W
SB
OH
FSV
OW
M
11 12
BV1
BV2
QRB
Z
FS
QRC
1 bl sw
Only with LMO24.113B2: re-ignition
br
Z
FS
«OH»
«OH»
Control sequence LMO14...
A B
tw
t3n
t1
TSA
t3
t3n t3n
7130d02e/1002
A B
tw
t1´
t1
t4
t3n
t3
TSA
t3n
7130d03e/1102
OW Release contact of oil preheater
OH Oil preheater
QRB Photoresistive flame detector
QRC Blue-flame detector
bl = blue, br = brown, sw = black
R Control thermostat or pressurestat
SB Safety limit thermostat
Si External primary fuse
W Limit thermostat or pressure switch
Z Ignition transformer
t3 Preignition time
t3n Postignition time
t4 Interval from flame signal to release «BV2»
C Operating position
D Controlled shutdown by «R»
µC1 Microcontroller 1
µC2 Microcontroller 2
C D
1
8
3
3
4
6
11
12
6
11
12
C D
1
8
3
3
4
5
6
11
12
t3n
6
11
12
11/12
CC1N7130en
15.10.2002