OMM-0153_E
• 5/11/2023 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 45 of 124
CENTURION Installation, Operation & Maintenance Manual
SECTION 5: INITIAL START-UP
14. With the valve position still at 100%, insert the combustion analyzer probe into the
exhaust manifold probe opening (see Section 5.2.3) and allow enough time for the
combustion analyzer reading to stabilize.
15.
Compare the combustion analyzer’s oxygen (O
2
) reading to the
O
2
value in the
Reading
column. If they differ, go to the
Main Menu
→
Calibration
→
Input/Output
→
O
2
Sensor
screen and adjust the
O
2
Offset
parameter, up to
±3%
, to make the on-board O
2
sensor match the value from the combustion analyzer. If your combustion analyzer is
correctly calibrated, and the on-board O
2
sensor cannot be made to match the analyzer,
the sensor may be defective.
16. Compare the
O
2
value in the
Target
and
Reading
columns.
If they don’t match, adjust
the
Blower Voltage
until the
O
2
value in both
columns
match; use either the
+
or
–
controls, or press on the field and type the value directly.
17. If adjusting blower voltage is not sufficient to get
O
2
Reading
column to match
Target
column, repeat Step 13 to adjust gas pressure to within the range shown in the table,
then repeat Step 16. Continue until the gas pressure is within the range in the Manifold
Gas Pressure Table above and the
O
2
Reading
column matches the
Target
column.
18.
Enter the downstream manometer’s gas pressure reading in the
Downstream Gas
Pressure
field. Note, this field appears only when
Valve Position %
=
100%
.
19. Compare the measured nitrogen oxide (NOx) and carbon monoxide (CO) readings to the
Target Values shown below.
If you are not in a “NOx-limited” area and/or do not have a
NOx measurement in your analyzer, set the O
2
to the value in the Standard NOx column.
NATURAL GAS Target Values @ 100% Valve Position
Model
Standard NOx
CO
O
2
%
NOx
CEN 2000/1600
5.6% ± 0.2%
≤20 ppm
<100 ppm
PROPANE GAS Target Values @ 100% Valve Position
Model
O
2
%
CO
CEN 2000/1600
5.6% ± 0.2%
<100 ppm
NOTE:
These instructions assume that the
inlet air temperature is 50°F - 100°F (10°C -
37.8°C)
. If NOx readings exceed the target values above, increase the O
2
level up to 1% higher
than the Target value. Record the increased O
2
value on the Combustion Calibration sheet.
20. Once the O
2
level is within the specified range at 100%:
•
Enter the NOx and CO readings from the Combustion Analyzer and multi-meter
in the Manual Combustion Calibration screen’s Reading column.
•
Enter the same values, plus the O
2
value, on the Combustion Calibration Data
Sheet provided with the unit.
21. Lower the Valve Position to the next calibration point using the
(Left) arrow key (if
using Method 1 in Step 9) or the Fine Valve Position
–
(Minus) key (if using Method 2).
