Adjustments; Pilot Burner Adjustment; Venturi Adjustment - Napoleon BGD48N Installation And Operation Instructions Manual

PILOT BURNER ADJUSTMENT

Adjust the pilot screw to provide properly sized fl ame. Turn in a
clockwise direction to reduce the gas fl ow.
FIGURE 55
FIGURE 56

VENTURI ADJUSTMENT

Air shutters have been factory set open according to the chart
below:
NG
LP
These settings are for the maximum horizontal vent run.- Adjust-
ment may be required depending on fuel type, vent confi guration
and altitude.

ADJUSTMENTS

FRONT REAR
/ /
1 " 7 "
8 32
/ /
3 " 3 "
16 8
Closing the air shutter will cause a more yellow fl ame, but can lead
to carboning. Opening the air shutter will cause a more blue fl ame,
but can cause fl ame lifting from the burner ports. The fl ame may not
appear yellow immediately; allow 15 to 30 minutes for the fi nal fl ame
colour to be established.
FIGURE 57
Air shutter adjustment must only be done by a qualified
installer!
COVER
SCREWS
FIGURE 58
FRONT
AIR HOUSING
To access the air shutter, remove the two screws that secure the cover
to the air housing, taking care not to damage the gasket.
NOTE: Ensure burner is seated onto orifi ce
23
REAR
AIR HOUSING
W415-0326 / C / 11.23.07