Johnson Controls G77 Series User Manual

G

G77x Intermittent Pilot Ignition Controls Technical Bulletin
5
No
Yes
Yes
No
Maximum
number of trials
attempted?
Yes
No
Yes
No
Yes
No
Yes
De-energize
control and valves
No
Sixteenth
flameout?
Control with
ignition
recycle?
Ignition lockout
(optional LED
flashes)
Yes
No
Recycle delay
period
Shutoff
Flame present when
not expected
Hard Lockout
(optional LED
turns off)
Start
Thermostat
call for heat
Prepurge
Flame
present for
30 seconds?
Detected fault
Trial for
ignition
Pilot
flame
sensed?
Energize
main valve
Run
Thermostat
calling for heat?
Flameout?
Interpurge
End
Figure 2: G77x Sequence of Operation
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Johnson Controls G77 Series Specifications

General

Brand	Johnson Controls
Model	G77 Series
Category	Controller
Language	English