20
CHECKING AND ADJUSTING
Adjust Pilot Burner
Pilot
fl
ame should surround 3/8” to 1/2” of pilot sensor. See
Figure 15.
To adjust Flame.
1.
Remove screw cover over pilot adjusting screw. See
Figure 14.
2.
Insert small screwdriver and adjust
fl
ame as needed.
Turn screw counterclockwise to increase
fl
ame, clock-
wise to decrease.
3.
Replace screw cover over pilot adjusting screw.
Main Burners
• Main burners do not require primary air adjustment and
are not equipped with primary air shutters.
• Main burner
fl
ames form sharp blue inner cones in
softer blue outer mantel, with no yellow. Remain still
when observing main burner
fl
ames.
• Check main burner ori
fi
ces, burner throat and
fl
ame
ports for dust and lint obstruction if
fl
ame appearance
is not correct.
• Remove rollout shield if necessary to observe main
burner
fl
ames. See Figure 16.
• Replace rollout shield after observation.
Gas Valve Safety Shutdown Test
1.
Test ignition system safety shutoff device after placing
boiler in operation.
2.
Boilers equipped with intermittent ignition, with
main burners
fi
ring, disconnect ignition cable from
intermittent pilot control box. Gas valve will shut off
main burners.
3.
TURN OFF ELECTRIC POWER to boiler before
reconnecting ignition cable, to prevent electric shock.
Figure 15 - Pilot Burner
Figure 16 - Main Burner
