Siemens LMO24.011C2 - Page 12

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Building Technologies Division CC1N7130en
Infrastructure & Cities Sector 22.08.2013
Legend
AL
Alarm device
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
OW
Release contact of oil preheater
OH
Oil preheater
QRB...
Photo resistive 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
TSA
Ignition safety time
tw
Waiting time
t1
Prepurge time
t1´
Purge time
t3
Preignition time
t3n
Postignition time
t4
Interval from flame signal to release of fuel valve 2 (BV2)
A´
Start of startup sequence with burners using an oil preheater (OH)
A
Start of startup sequence with burners using no oil preheater (OH)
B
Time of flame establishment
C
Operating position
D
Controlled shutdown by control thermostat or pressurestat (R)
Control signals
Required input signals
Perm. input signals
µC1
Microcontroller 1
µC2
Microcontroller 2