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A soft, steady blue flame
should enter the heat tube
without touching the front
outside rim of the tube.
The flame seems to "lift off"
the face of the burner.
To correct adjust main
burner as described in
1.5.3.2.
Have gas company check
incoming gas pressure.
Adjust manifold pressure as
described in 1.5.3.2.
The tubes and baffles are
badly carbonized. Check
vent and adjust if necessary.
Check for heat tube or flue
blockage.
1.5.3 Main Burner System
For the burners to work the gas supply valve must be open and the main power switch must be on.
The main burner receives gas from the main gas supply through the thermostatically controlled valve.
When the thermostat is turned up the gas control valve opens. If you have a pilot light system, the pilot
will ignite the burners. The electronic ignition system will create a spark to ignite the gas. After the
burner system is operating, perform the burner adjustments in the following procedure. Figure 1-5
illustrates the different conditions possible for the main burner.
INSUFFICIENT FLOW EXCESSIVE FLOW
INSUFFICIENT GAS PRESSURE NORMAL FLOW
Figure 1-5 Main Burner Conditions