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24
W415-0381 / H / 12.07.07
FIGURE 57
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.
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.
FIGURE 55
AIR SHUTTER
NG 1/4"
LP
7
/16"
FIGURE 54
VENTURI COVER
FIGURE 58
ADJUSTMENTS
PILOT BURNER ADJUSTMENT
VENTURI ADJUSTMENT
NOTE: Ensure burner is seated onto orifi ce.
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