Inter-Purge
me expired
Flame not
detected &
Ignion me
expired
No Inter-Purge
retries remaining
Ignion sequence started
Ignion sequence started
& ONDEMAND enabled
No WAIT
retries remaining
WAIT
me expired
Pre-Purge Timer
expired
Flame not
detected
Flame
detected
Establish Pilot
Delay expired
All processes
inacve &
ONDEMAND
disabled
Any process
acve
inacve &
ONDEMAND
enabled
Alarm
cleared
Alarm
cleared
Any process
call for heat
INDEPENDENT process
condion not met
INDEPENDENT process
condion met
INDEPENDENT
INACTIVE
INDEPENDENT
ACTIVE
PURGE
WAIT
IGNITE
START-UP
PRE-PURGE
STOPPED
OPEN
LOW
BATTERY
BMS FAULT
SHUTDOWN
3
SHUTDOWN
2
SHUTDOWN
1
PILOT
FAILURE
POC
FAILURE
LOW BATTERY
VOLTAGE
PERMISSIVE
OPEN
SHUTDOWN 3
ACTIVE
BMS FAULTSHUTDOWN 1
ACTIVE
SHUTDOWN 2
ACTIVE
STOP
pressed
Powered ON
or reset
BURNING
STATES
(SUPER STATES)
IDLE
PILOT ON
EST PILOT
INDEPENDENT PROCESS
83
Alarms stop the system, regardless of what state it is in, if the permissive is acve, baery voltage is low, failure to light
the pilot, proof of valve closure was not proved, or the high temperature limit reached. In all alarm states the system
closes all valves, except for the INDEPENDENT process, and acvates the ALARM output. The system will transion to
the STOPPED state once the alarm is cleared (Image 4.3.2).
Alarm & Shutdown
states in red
Image 4.3.2 · Alarm & shutdown states