Program Sequence
ECONOMY (FULLY CLOSED)
CLOSE (MINIMUM)
MAIN (DIRECT IGNITION)
MAIN (PILOTED)
COMBUSTION AIR BLOWER
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 BLOWER
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
START
PREPURGE
P
Required
INPUT
Allowed
INPUT
1
...
...
...
...
...
...
...
1
2
...
...
5
8
6
7
12
13
14
POSTPURGE
4
15
21
3
2
RESET
ALARM
Output ON (Powered)
NOT Allowed
INPUT
Output OFF
N/A
10/12
Siemens Building Technologies
HVAC Products
11.15.2004
