Garland 200 - Manual (Page 36)

Page 36 Part # MCOSM06 Rev 1 (11/03/08)
Fig 3 Sequence of Operation
Start
Thermostat
call for heat
Prepurge
Trial for
ignition
Main valve
flame sensed?
Yes
No
Interpurge
Maximum
number of trials
attempted?
No Yes
Ignition lookout
(optinal LED
flashes)
No
Control
with ignition
recycle?
Yes
Yes
Recycle delay
period
Flame present when
not expected
No Yes
Flame
present for
30 seconds?
Detected fault
Hard Lockout
(optional LED
turns off)
Run
Flameout?
Yes
Sixteenth
flameout?
No
No
Yes
Thermostat
callin for heat?
No
De-energize
control and valves
End