Gentherm P-5050, Руководство по эксплуатации, Страница: 54 / 98

Gentherm Global Power Technologies 8-4
P-5050 62553 rev.8
8.1.2.1 Measuring CO Emissions Levels
The model P-5050 will not produce excessive amounts of CO if properly adjusted. Due to
the open exhaust system of TEG, the CO measurement must be in the free air state. In
a free air measurement, the allowable CO rate is 800 ppm however a correctly adjusted
P-5050 will produce less than 120 ppm CO air free. In order to be able to determine the
levels of air-free CO
ppm
, a combustion analyzer capable of measuring CO
ppm
and either CO
2
percentage, or O
2
percentage, is needed.
The equations used to calculate the air-free stage of CO are:
• For Propane when using as measured CO
2
percentage, and CO
ppm
:
• For Natural Gas when using as measured CO
2
percentage, and CO
ppm
:
• When using as measured O
2
percentage, and CO
ppm
:
Where: CO
AFppm
= Carbon monoxide, air-free ppm.
CO
ppm
= As-measured combustion gas carbon monoxide ppm.
O
2
= Percentage of oxygen in combustion gas, as a percentage.
CO
2
= Percentage of carbon dioxide in combustion gas, as a percent-
age.
The model P-5050 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 correctly,
the fuel pressure may be slightly adjusted to match the measured V
set
voltage with the
required V
set
value. Use Figure 22 to determine how much to adjust the fuel pressure.
Example: Required V
set
= 6.83 V
Measured V
set
= 6.5 V
Difference = +0.33 V
[1]
[2]
[3]
[1], [2], [3] as per CSA
CO
AFppm
= x CO
ppm
11.8
CO
2
( )
CO
AFppm
= x CO
ppm
( )
13.8
CO
2
CO
AFppm
= x CO
ppm
( )
21
21-O
2