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Benchmark 2500DF-3000DF Installation, Operation & Maintenance Manual
NATURAL Gas Combustion Calibration - Continued
18. Press the MENU key on the front panel of the C-MORE until Combustion Cal Menu
appears on the display.
19. Press the ▲ arrow key until SET Valve Position appears on the display.
20. Press the CHANGE key. SET Valve Position will begin to flash.
21. Press the ▲ arrow key until the SET Valve Position reads the following, then press the
ENTER key:
BMK 3000DF – 85 %
•
•
BMK 2500DF – 70 %
22. Next, press the ▼ arrow key until CAL Voltage displays the following:
•
BMK 3000DF – 85 %
•
BMK 2500DF – 70 %
23. Press the CHANGE key and observe that CAL Voltage 85% (for BMK 3000DF) or 70%
(for BMK 2500DF) is flashing.
24. The oxygen level at the selected valve position should be as shown below. Also, ensure
that the nitrogen oxide (NOx) and carbon monoxide (CO) readings do not exceed the
following values:
Model
BMK 3000DF
BMK 2500DF
25. If the oxygen level is not within the specified range, adjust the level using the ▲ and ▼
arrow keys. This will adjust the output voltage to the blower motor as indicated on the
display. Pressing the ▲ arrow key increases the oxygen level and pressing the down ▼
arrow key decreases the oxygen level.
26. Once the oxygen level is within the specified range at 85% (for BMK 3000DF) or 70% (for
BMK 2500DF), press the ENTER key to store the selected blower output voltage for the
85% valve position. Record all readings on the Combustion Calibration Sheets provided.
27. Repeat steps 19 through 26 for the valve positions shown in the tables below. The oxygen
(O
), nitrogen oxide (NOx) and carbon monoxide (CO) should remain within the same
2
limits for all valve positions as shown in the following table.
If NOx readings exceed the target values shown (<20 ppm),
increase the O
range shown in the table. Record the increased O
Combustion Calibration sheet.
Page 58 of 234
05/21/2014
CHAPTER 4 – INITIAL START-UP
Combustion Calibration Readings
Valve
Oxygen (O
Position
%
85%
5.4% ± 0.4%
70%
5.9% ± 0.4%
NOTE
level up to 1% higher than the listed calibration
2
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Phone: 800-526-0288
)
Nitrogen
2
Oxide (NOx)
Monoxide (CO)
<30 ppm
<20 ppm
value on the
2
Carbon
<100 ppm
<100 ppm
OMM-0099_0A
GF-145
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