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W415-0327 / B / 12.07.07
23
VENTURI COVER
Adjust the pilot screw to provide properly sized fl ame. Turn in a
clockwise direction to reduce the gas fl ow.
Air shutters have been factory set open according to the chart
below:
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.
Air shutter adjustment must only be done by a qualified
installer!
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
FIGURE 56
FIGURE 55
ADJUSTMENTS
PILOT BURNER ADJUSTMENT
VENTURI ADJUSTMENT
FIGURE 58
FRONT REAR
NG
1
/8
"
7
/32
"
LP
3
/16
"
3
/8
"
FIGURE 57