Johnson Controls G775 - Page 18

18 G

G77x Intermittent Pilot Ignition Controls Technical Bulletin
Start
Connect pilot valve securely
between Terminal 1 and ground
Are pilot valve
connections
correct and
secure?
Yes
Is 24 VAC
between Terminal 1
and ground?
No
Replace
control
Yes
No
No
End
Yes
No
Yes
Yes
No
Is inlet
gas pressure
per manufacturer’s
specifications?
Correct gas
pressure
Is gas at
pilot burner?
Make sure pilot line is
not obstructed. Check
for clean orifice.
If OK,
replace pilot
valve
Is spark gap
per manufacturer’s
specifications and
located in pilot
stream?
Correct or
replace pilot
burner
Shield from
drafts
Figure 13: Spark Present, but Pilot Does Not Light
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