23
ADJUSTMENTS
PILOT BURNER ADJUSTMENT
Adjust the pilot screw to provide properly sized flame. Turn in a clockwise direction to reduce the gas flow.
OL
|
|
| F |
HI | O |
| F |
|
|
| |
|
| OL | P |
|
|
|
TOLIP
PILOT SCREW
FIGURE 50
FIGURE 51
VENTURI ADJUSTMENT
Air shutters have been factory set open according to the chart below:
| AIR SHUTTER |
|
|
NG | 3/32" |
LP | 3/16" |
|
These settings are for the maximum horizontal vent run. Adjustment may be required depending on fuel type, vent configuration and altitude.
Closing the air shutter will cause a more yellow flame, but can lead to carboning.
Opening the air shutter will cause a more blue flame, but can cause flame lifting from the burner ports. The flame may not appear yellow immediately; allow 15 to 30 min- utes for the final flame colour to be established.
FIGURE 52
Air shutter adjustment must only be done by a
qualified installer!
VENTURI
COVER
FIGURE 53
To access the air shutter, remove the two screws that se- cure the cover to the air housing, taking care not to dam- age the gasket.