23
ADJUSTMENTS
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: 
| FRONT | REAR |
NG | 1/8" | 7/32" |
LP | 3/16" | 3/8" |
These settings are for the maximum horizontal vent run.- Adjust- ment may be required depending on fuel type, vent confi guration and altitude.
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!
FIGURE 58
VENTURI COVERTo 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
