23
W415-0244 / A / 05.15.03
Closing the air shutter will cause a more yellow flame, but
can lead to carboning.
Opening the air shutter will cause a more blue flame, but
can cause flame lifting from the burner ports. The flame
may not appear yellow immediately; allow 15 to 30 min-
utes for the final flame colour to be established.
Air shutter adjustment must only be done by a
qualified installer!
To access the air shutter, remove the two screws that se-
cure the cover to the air housing, taking care not to dam-
age the gasket.
Adjust the pilot screw to provide properly sized flame. Turn
in a clockwise direction to reduce the gas flow.
Air shutters have been factory set open according to the
chart below:
These settings are for the maximum horizontal vent run.
Adjustment may be required depending on fuel type, vent
configuration and altitude.
FIGURE 51
AIR SHUTTER
NG
3/32"
LP
3/16"
FIGURE 52
FIGURE 50
COVER
VENTURI
FIGURE 53
PILOT SCREW
LO
OT
PIL
IH
PL
O
O
FF
ADJUSTMENTS
PILOT BURNER ADJUSTMENT
VENTURI ADJUSTMENT
