AERCO BMK 1.5 LN October 2012 - Manual (Page 55)

CHAPTER 4
INITIAL START-UP
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GF-120
OMM-0041 0E
Benchmark 1.5LN Low NOx Boiler
Installation, Operation and Maintenance Manual
The oxygen level at the 30% valve position should be as shown below. Also, ensure that 47.
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
7.0 % <50 ppm <30 ppm
If the oxygen level is not within the specified
range, adjust the level using the ▲ and ▼
48.
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.
Once the oxygen level is within the specified range at 30%, press the ENTER key to 49.
store the selected blower output voltage for the 30% valve position.
Press the ▲ arrow key until SET Valve Position appears on the C-MORE display.
50.
Press the CHANGE key. SET Valve Position will begin to flash. 51.
Press the ▼ arrow key until the SET Valve Position reads 16%, then press the ENTER
52.
key.
Press the ▼ arrow key until CAL Voltage 16% is displayed.
53.
Press the CHANGE key. CAL Voltage 16% will begin to flash. 54.
The oxygen level at the 16% valve position should be as shown below. Also, ensure that 55.
the carbon monoxide (CO) and nitrogen oxide (NOx) readings do not exceed the values
shown.
Table 4-6: Combustion Oxygen Levels for a
16% Air/Fuel Valve Position
Oxygen
%
± 0.2
Carbon
Monoxide NOx
8.0 % <50 ppm <30 ppm
If the oxygen level is not within the specified range, adjust the level using the ▲ and ▼
56.
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.
Once the oxygen level is within the specified range at 16%, press the ENTER key to 57.
store the selected blower output voltage for the 16% valve position.
This completes the natural gas combustion calibration procedure. 58.