Siemens LMV51 Series Basic Documentation page 17

Block diagram (cont'd)
LMV51.x
Power signal for air
pressure switch (APS)
Power signal
for controller
Power signal for
start release oil
Power signal for
heavy oil direct start
Power signal for
pressure switch-min-oil
Power signal for
pressure switch-max-oil
Power signal for
pressure switch
Neutral conductor
Power signal
transformer
AC power signal G0
AC power signal G
Siemens Building Technologies
HVAC Products
X9-02.1
X3-02.2
L1'
X5-03.4
X6-01.2
X6-01.4
X5-01.3
X5-02.3
X9-03.1
T1
AGG5.2xx
1
X10-01.4
PRI
LINE
X10-01.3
2
1
X10-01.2
SEK I
12VAC
X10-01.1
2
Basic Documentation LMV51...
1 General
X9-01.4
X9-01.3
X9-01.2
X9-01.1
P
X3-02.1
INT
GAS
X4-01.1
OIL
X4-01.2
X4-01.3
X4-01.4
ON/OFF
X5-03.1
3
X5-03.2
2
X5-03.3
START
X6-01.1
HO-START
X6-01.3
P
min
X5-01.2
max
P
X5-02.2
P
min
X9-03.4
max
P
X9-03.3
LT
P
(CPI)
X9-03.2
QRI
X10-02.6
X10-02.2
X10-02.5
QRB
X10-02.4
X10-02.3
ION X10-02.1
X10-03.1
LMV51.x
Fuel valve V1 (GAS)
Fuel valve V2 (GAS)
Fuel valve PV (GAS)
Fuel valve SV (GAS)
Air pressure switch (APS)
Fuel selection GAS
Fuel selection OIL
Fan contactor contact (FCC) or FGR-PS
Reset / manual lockout
Controller (ON/OFF)
Controller closes / stage 3
Controller opens / stage 2
Start release oil
Heavy oil direct start
Pressure switch-min-oil
Pressure switch-max-oil
Pressure switch-min-gas
Pressure switch-max-gas
Pressure switch VP gas LT or
closed position indicator (CPI)
QRI (IR detector) signal voltage
QRI (IR detector) power supply
Protective earth (PE)
Neutral conductor (N)
Power supply (L)
QRB signal voltage
Ionization probe (ION)
CC1P7550en
29.05.2002
GAS
OIL + GAS
OIL
GAS
FLAME
17/157