Siemens LFL Series - Program Sequence Chart

Program Sequence
ECONOMY (FULLY CLOSED
)
CLOSE (MINIMUM)
MAIN (DIRECT IGNITION)
MAIN (PILOTED)
COMBUSTION AIR BLOWE
R
COMBUSTION AIR SW TEST
COMBUSTION AIR PROVE
RECYCLE LIMITS
LOCKOUT LIMITS
POWER (NEUTRAL)
POWER (HOT)
ACTUATOR FEEDBACK
POC (PROOF OF CLOSURE)
RELEASE TO MOD
NOT USED
FLAME SIGNAL
COMBUSTION AIR BLOWE
R
CLOSE (MINIMUM)
ECONOMY (FULLY CLOSED)
P
OPEN
Modulation
1
2
...
...
...
...
...
...
MTFI
PTFI
IDLE
...
...
...
...
19
22
23
24
18
16
17
PILOT
IGNITION
POSTPURGE
ACTUATOR
20
11
10
9
OPEN
PROGRAM SEQUENCE CHART
S
TART
PREPURGE
P
RequiredINPUT AllowedINPUT
1
...
...
...
...
...
...
...
1
2
...
...
5
8
6
7
12
13
14
POSTPURGE
4
15
21
3
2
RESET
ALARM
Output ON (Powered)
NOT AllowedINPUT Output OFF N/A
10/12
Siemens Building Technologies HVAC Products
11.15.2004