AERCO BMK 1.5 LN July 2011 - Manual (Page 50)

CHAPTER 4: INITIAL START-UP
Page 50 of 152 PR2: 05/09/12
Benchmark 1.5LN Low NOx Boiler
Operation and Maintenance Manual
OMM-0041_0D
GF-120
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288
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 4-3: Combustion Oxygen Levels for a 60% Air/Fuel Valve Position
Oxygen
%
± 0.2
Carbon
Monoxide NOx
6.3 % <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
Oxyge
n %
± 0.2
Carbo
n
Monox
ide
NOx
7.0 % <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.
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.