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AIR GATE ADJUSTMENT
To regulate the combustion air, adjust the manual air gate (3), by
loosening the locking screws (4).
Once the optimal adjustment is reached, tighten the locking
screws (4).
EXAMPLE SETTING - (for natural gas)
To set the air intake for a desired burner output of 450,000 Btu/hr,
use TABLE to determine the correct air gate setting.
In this case, the setting would be 1.8 for natural gas.
Turn the manual air gate (3) until the arrow points to 1.8 on the
scale.
Tighten locking screws (4).
All settings in TABLE are obtained with zero (0) pressure in the
combustion zone and at normal operating temperatures. i.e.,
steady state hot conditions.
Note: Burner must be fired ONLY with fuel that is listed on the burner serial label.
PRESSURE WORKING CHART
The chart below shows effects of pressure in the combustion zone on the minimum/maximum burner outputs.
In this example, with a maximum operating pressure of 1.0 inches water column in the combustion zone, you will
be able to obtain a maximum of 615 KBtu/h burner output.
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
40
60
100
205
311
Any change from zero (0) pressure in the combustion zone will affect the KBtu output of the burner. To supply the
required input to the appliance, manifold pressure will have to be adjusted to compensate for this condition.
20027974
140
180
220
472
615
751
4
D10659
PRESSURE WORKING CHART
Natural and Propane Gas
260
265
kW/h
MBtu/h
900
888
GB
3
4
D5231
11
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