24
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 54
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 55
FIGURE 58
FLAME CHARACTERISTICS
It is important to periodically perform a visual check of the pilot and the burner fl ames. Conpare them to the fi gures shown. If any fl ames appear abnormal call a qualifi ed service technician.
FIGURE 56
VENTURI COVER
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.
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.
