11
ADJUSTMENTS
PILOT BURNER ADJUSTMENT |
| VENTURI ADJUSTMENT |
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Remove the pilot screw cap. Adjust the pilot screw to pro- vide properly sized flame. Turn in a clockwise direction to reduce the gas flow. Replace the pilot screw cap.
FIGURE 23
This unit is approved for use with a 2" liner for air intake and a 3" liner for exhaust. For best performance, however, it is recommended to use two 3" liners.
Air shutter settings will differ depending on the liner sys- tem used. Use the charts below to determine the correct air shutter setting:
3"/3"LINERSYSTEM
| FRONT | REAR |
NG | 1/16" | 3/16" |
LP | 3/16" | 7/16" |
| AIR SHUTTER SETTING | |
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| 2"/3"LINERSYSTEM | |
| FRONT | REAR |
NG | 1/8" | 1/4" |
LP | 1/4" | 5/8" |
| AIR SHUTTER SETTING | |
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FIGURE 22
VENT RESTRICTION
Some vent configurations may display a very active flame. If this appearance is not desirable, the vent exit may be restricted using the restrictor plate shown in FIGURE 24.
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 minutes for the final flame colour to be estab- lished.
Air shutter adjustment must only be done by a qualified gas installer!
FIGURE 25
FIGURE 24
