AERCO BMK 6000 - Manual (Page 207)

Benchmark 6000 Boiler Installation, Operation & Maintenance Manual
APPENDIX N – ULTRA-LOW NOX CALIBRATION
OMM-0086_0D AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 207 of 210
GF-133
Ph.: 800-526-0288
03/20/14
Ultra-Low NOx Natural Gas Combustion Calibration - Continued
NOTE
The remaining combustion calibration steps are performed using the
Combustion Cal Menu included in the C-More Control System. The
combustion calibration control functions will be used to adjust the oxygen
level (%) at valve positions of 80%, 60%, 45%, 30% and 18% as described
in the following steps. These steps assume that the inlet air temperature is
within the range of 50°F to 100°F. If NOx readings exceed the target value
of 9 ppm, increase the O
2
level up to 1% higher than the listed calibration
range. Record the increased O
2
value on the Combustion Calibration
sheet.
17. Lower the valve positio
n to 80% using the ▼arrow key.
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 SET Valve Position reads 80%. Press the ENTER key.
23. Next, press the dow
n (▼) arrow key until CAL Voltage 80% is displayed.
24. Press the CHANGE key and observe that CAL Voltage 80% is flashing.
25. The oxygen level at the 80% 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:
Ultra-Low NOx Combustion Calibration Readings
Valve Position Oxygen (O
2
) % Nitrogen Oxide (NOx) Carbon Monoxide (CO)
80% 5% - 7% <9 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 80%, 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.
28. Repeat steps 20 through 27 for valve positions of 60%, 45%, 30% and 18%* (see
*NOTE below). The oxygen (O
2
), nitrogen oxide (NOx) and carbon monoxide (CO)
should remain within the same limits for all valve positions as shown in the following
table.
*NOTE
Set the Valve Position at 18% but make adjustments to the Combustion
Calibration value designated as 16%.