Johnson Controls G76 Series Installation Sheets Manual page 5

Start
Thermostat
call for heat
Prepurge
Main valve
flame sensed?
Maximum
No
number of trials
Interpurge
attempted?
Ignition Lockout
(optional LED
flashes)
Flame present when
No
Yes
No
Yes
Control
No
with ignition
recycle?
Recycle delay
period
Figure 2: G76x Sequence of Operation
G—G76x Direct Spark Ignition Controls Technical Bulletin
not expected
Flame
Yes
present for
30 seconds?
Run
Flameout?
Yes
Yes
Sixteenth
flameout?
Yes
Detected Fault
Hard Lockout
(optional LED
turns off)
Yes
Thermostat
No
calling for heat?
No
De-energize
control and valves
No
End
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