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When using as measured O
Where:
The model 5220 does not produce excessive concentrations of CO if adjusted properly.
8.1.3 Fuel Pressure Adjustment
Once the air is adjusted, and if the fuel system and burner appear to be operating cor-
rectly, the fuel pressure may be slightly adjusted to match the measured V
with the required V
pressure.
Example:
Based on Figure 24 the fuel pressure must then be increased 3.6 kPa (0.52 psig).
Figure 24 Change in V
Gentherm Global Power Technologies
5220
CO
= Carbon monoxide, air-free ppm.
AFppm
CO
= As-measured combustion gas carbon monoxide ppm.
ppm
O
= Percentage of oxygen in combustion gas, as a percentage.
2
CO
= Percentage of carbon dioxide in combustion gas, as a per-
2
centage.
value. Use Figure 24 to determine how much to adjust the fuel
set
Required V
set
Measured V
set
Difference
Versus Fuel Pressure Adjustment, Typical
set
percentage, and CO
2
=
14.1 V
=
13.5 V
=
+0.6 V
28142 Rev. 14
:
ppm
voltage
set
8-5
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