AERCO BMK 3.0 LN Natural Gas July 2011 - Manual (Page 38)

INITIAL START-UP
4-4
NOTE
The remaining combustion calibration steps are
performed using the Combustion Cal Menu
included in the C-More Control System. The
combustion calibration control functions will be
used to adjust the oxygen level (%) at air/fuel
valve positions of 70%, 50%, 45%, 30% and
14% as described in the following steps. These
steps assume that the inlet air temperature is
within the range of 50°F to 100°F.
16. Press the
MENU Key on the front panel of
the C-MORE and access the Setup menu.
Enter password 6817 and then press the
ENTER key.
17. Press the MENU Key on the front panel of
the C-MORE until Combustion Cal Menu
appears on the C-More display.
18. Press the ▲ arrow key until SET Valve
Position appears on the C-MORE display.
19. Press the CHANGE key. SET Valve Position
will begin to flash.
20. Press the ▲ arrow key until the SET Valve
Position reads 70%. Press the ENTER key.
21. Next, press the down (▼) arrow key until
CAL Voltage 70% is displayed.
22. Press the CHANGE key and observe that
CAL Voltage 70% is flashing.
23. The oxygen level at the 70% 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.
Combustion Oxygen Level at
70% Valve Position
Oxygen %
± 0.2
Carbon
Monoxide NOx
6.0 % <100 ppm <30 ppm
24. 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
down ▼ arrow key decreases the oxygen
level.
25. Once the oxygen level is within the specified
range at 70%, press the ENTER key to store
the selected blower output voltage for the
70% valve position.
NOTE
The remaining steps basically repeat the
procedures in steps 18 through 25 for air/fuel
valve positions of 50%, 40%, 30% and 14%
open. However, since oxygen levels vary, these
steps are repeated in their entirety. When
performing these steps, also ensure that the
carbon monoxide (CO) and nitrogen oxide (NOx)
readings do not exceed the values shown for
each valve position.
26. Press the ▲ arrow key until SET Valve
Position appears on the C-MORE display.
27. Press the CHANGE key. SET Valve Position
will begin to flash.
28. Press the ▼ arrow key until the SET Valve
Position reads 50% and then press the
ENTER key.
29. Press the down ▼ arrow key until CAL
Voltage 50% is displayed.
30. Press the CHANGE key. CAL Voltage 50%
will begin to flash.
31. The oxygen level at the 50% 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.
Combustion Oxygen Level at
50% Valve Position
Oxygen %
± 0.2
Carbon
Monoxide NOx
7.0 % <50 ppm <20 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
▼ arro w key decreases the oxygen level.
33. Once the oxygen level is within the specified
range at 50%, press the ENTER key to store
the selected blower output voltage for the
50% 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 40%, then press the ENTER
key.