User Manual

Chapter 4 Benchmark 2.0LN Low NOx Boiler GF-123
Initial Start-Up Installation, Operation and Maintenance Manual OMM-0046_0F
Page 56 of 172 AERCO International Inc.● 100 Oritani Dr. ● Blauvelt, NY 10913. ● Ph: 800-526-0288 PR1 10/17/12
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 4-3: Combustion Oxygen Levels for a 60% Air/Fuel Valve Position
Oxygen %
± 0.2
Carbon Monoxide NOx
5.7 %
<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 4-4: Combustion Oxygen Levels for a 45% Air/Fuel Valve Position
Oxygen %
± 0.2
Carbon Monoxide NOx
7.2 %
<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.
41. Once the oxygen level is within the specified range at 45%, press the ENTER key to store
the selected blower output voltage for the 45% valve position.
42. Press the ▲ arrow key until SET Valve Position appears on the C-MORE display.
43. Press the CHANGE key. SET Valve Position will begin to flash.
44. Press the ▼ arrow key until the SET Valve Position reads 30%, then press the ENTER key.
45. Press the ▼ arrow key until CAL Voltage 30% is displayed.
46. Press the CHANGE key. CAL Voltage 30% will begin to flash.
47. The oxygen level at the 30% valve position should be as shown in Table 4-5. Also, ensure
that the carbon monoxide (CO) and nitrogen oxide (NOx) readings do not exceed the values
shown.
Table 4-5: Combustion Oxygen Levels for a 30% Air/Fuel Valve Position
Oxygen %
± 0.2
Carbon Monoxide NOx
8.0 %
<50 ppm
<30 ppm