AERCO BMK 2.0 LN Natural Gas (SN G-11-1861 and above) - Manual (Page 60)

Chapter 4
Benchmark 2.0LN Low NOx Boiler
GF-123
Initial Start-Up Installation, Operation and Maintenance Manual OMM-0046_0E
Page 60 of 170 AERCO International Inc.● 100 Oritani Dr. ● Blauvelt, NY 10913. ● Ph: 800-526-0288 PR1 08/20/12
NOTE
The remaining steps basically repeat the procedures in steps 18
through 25 for valve positions of 60%, 45%, 30% and 16%.
However, since oxygen levels vary, these steps are repeated in
their entirety. When performing these steps, also ensure that the
carbon monoxide (CO) and nitrogen oxide (NOx) readings do not
exceed the values shown for each valve position.
26.
Press the ▲ arrow key until SET Valve Position appears on the C-MORE display.
27. Press the CHANGE key. SET Valve Position will begin to flash.
28.
Press the ▼ arrow key until the SET Valve Position reads 60% and press the ENTER key.
29.
Press the down ▼ arrow key until CAL Voltage 60% is displayed.
30. Press the CHANGE key. CAL Voltage 60% will begin to flash.
31. The oxygen level at the 60% valve position should be as shown below. Also, ensure that the
carbon monoxide (CO) and nitrogen oxide (NOx) readings do not exceed the values shown.
Table 4-9: Combustion Oxygen Level at
60%
Valve Position
Oxygen %
± 0.2
Carbon Monoxide NOx
4.7 % <50 ppm <30 ppm
32. 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 ▼ arrow key
decreases the oxygen level.
33. Once the oxygen level is within the specified range at 60%, press the ENTER key to store
the selected blower output voltage for the 60% valve position.
34.
Press the ▲ arrow key until SET Valve Position appears on the C-MORE display.
35. Press the CHANGE key. SET Valve Position will begin to flash.
36.
Press the ▼ arrow key until the SET Valve Position reads 45%, then press the ENTER key.
37.
Press the ▼ arrow key until CAL Voltage 45% is displayed.
38. Press the CHANGE key. CAL Voltage 45% will begin to flash.
39. The oxygen level at the 45% valve position should be as shown below. Also, ensure that the
carbon monoxide (CO) and nitrogen oxide (NOx) readings do not exceed the values shown.
Table 4-10: Combustion Oxygen Level at
45%
Valve Position
Oxygen %
± 0.2
Carbon Monoxide NOx
6.0 % <50 ppm <30 ppm
40.
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 ▼ arrow key
decreases the oxygen level.