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COMBUSTION AIR ADJUSTMENTS:
NOTE:
Proper combustion air adjustment must be achieved using a
certified combustion analyzer to ensure complete combustion.
The air adjustment should be made to achieve 10% CO
2
on natural
gas and 12% CO
2
on propane.
SETTING THE AIR ADJUSTMENT PLATE
A)
Regulation of the combustion air flow is made by adjustment of the manual
AIR ADJUSTMENT PLATE (1) after loosening the FIXING SCREWS (2 and
3). The initial setting of the air adjustment plate should be made according to
Column 3 in the Burner Set-up Chart.
B)
The proper number on the manual AIR
ADJUSTMENT PLATE (1) should line up
with the SETTING INDICATOR (4) on the
fan housing cover. Once set, the air ad-
justment plate should be secured in place
by tightening SCREWS 2 and 3.
C)
The final position of the air adjustment
plate will vary on each installation. Use in-
struments to establish the proper settings
for maximum CO
2
.
NOTE:
Variations in flue gas, CO
2
and temperature readings may be
experienced when the burner cover is put in place. Therefore, the burner cover
must
be in place when making the final combustion instrument readings, to
ensure proper test results.
Summary of Contents for FVN-750
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