Owner manual

CHAPTER 4: INITIAL START-UP
Page 48 of 160 PR2: 04/22/13
Benchmark 2.0LN Dual-Fuel Low NOx Boiler
Operation and Maintenance Manual
OMM-0052_0E
GF-127
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288
Table 4-4: Combustion Oxygen Levels for a 45% Air/Fuel Valve Position
Oxygen %
± 0.2
Carbon Monoxide NOx
6.4 %
<50 ppm
<20 ppm
41. 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.
42. 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.
43. Press the ▲ arrow key until SET Valve Position appears on the C-MORE display.
44. Press the CHANGE key. SET Valve Position will begin to flash.
45. Press the ▼ arrow key until the SET Valve Position reads 30%, then press the ENTER
key.
46. Press the ▼ arrow key until CAL Voltage 30% is displayed.
47. Press the CHANGE key. CAL Voltage 30% will begin to flash.
48. The oxygen level at the 30% 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 4-5: Combustion Oxygen Levels for a 30% Air/Fuel Valve Position
Oxygen %
± 0.2
Carbon Monoxide NOx
8.4 %
<50 ppm
<20 ppm
49. 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.
50. Once the oxygen level is within the specified range at 30%, press the ENTER key to
store the selected blower output voltage for 30% valve position.
51. Press the ▲ arrow key until SET Valve Position appears on the C-MORE display.
52. Press the CHANGE key. SET Valve Position will begin to flash.
53. Press the ▼ arrow key until the SET Valve Position reads 20%, then press the ENTER
key.
54. Press the ▼ arrow key until CAL Voltage 18% is displayed.
55. Press the CHANGE key. CAL Voltage 20% will begin to flash.
56. The oxygen level at the 20% 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 4-6: Combustion Oxygen Levels for a 20% Air/Fuel Valve Position