Benchmark 6000 Boiler Installation, Operation & Maintenance Manual
CHAPTER 4 – INITIAL START-UP
OMM-0086_0D AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 65 of 210
GF-133 Ph.: 800-526-0288 03/20/14
Natural Gas Combustion Calibration (Cont.)
18. Press the MENU key on the front panel of the C-MORE and access the Setup menu. Enter
password 6817 and then press the ENTER key.
19. Press the MENU key on the front panel of the C-MORE until Combustion Cal Menu
appears on the display.
20. Press the ▲ arrow key until SET Valve Position appears on the display.
21. Press the CHANGE key. SET Valve Position will begin to flash.
22. Press the ▲ arrow key until the SET Valve Position reads 80%. Press the ENTER key.
23. Next, press the down (▼) arrow key until CAL Voltage 70% is displayed.
24. Press the CHANGE key and observe that CAL Voltage 70% is flashing.
25. The oxygen level at the 70% 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:
Combustion Calibration Readings
Valve Position Oxygen (O
2
) % Nitrogen Oxide (NOx) Carbon Monoxide (CO)
70% 6.0% - 6.5% <20 ppm <100 ppm
26. 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.
27. Once the oxygen level is within the specified range at 70%, press the ENTER key to store
the selected blower output voltage for the 80% valve position. Record all readings on the
Combustion Calibration Sheets provided.
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