Owner manual

CHAPTER 4: INITIAL START-UP
Page 52 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
40. 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
7.0 %
<100 ppm
<100 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 4-11: Combustion Oxygen Level at 30% Valve Position
Oxygen %
± 0.2
Carbon Monoxide
NOx
7.9 %
<100 ppm
<100 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 the 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 21%, then press the ENTER key.
54. Press the ▼ arrow key until CAL Voltage 21% is displayed.
55. Press the CHANGE key. CAL Voltage 21% will begin to flash.
56. The oxygen level at the 21% 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.