AERCO BMK 1.5 LN Dual Fuel June 2010 - Manual (Page 39)

INITIAL START-UP
NATURAL
GAS INLET
PROPANE
INLET
PROPANE
SSOV WITH
REGULATOR
NATURAL
GAS
SSOV WITH
REGULATOR
BRASS HEX HEAD CAP
(REMOVE TO ADJUST
PROPANE REGULATOR)
Figure 4-7
Regulator Adjustment Screw Location
14. Compare the measured oxygen % level to
the range 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
5.4 % <100 ppm
15. If the oxygen level is not within the specified
range, adjust the level using the up (▲) and
down (▼) arrow keys on the VFD. Using the
up (▲) arrow key will increase oxygen level
and the down (▼) arrow key will decrease
the oxygen level.
16. Once the oxygen level is within the specified
range at 70%, lower the valve position to
60%.
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 valve
positions of 60%, 45%, 30% and 16% as
described in the following steps. These
steps assume that the inlet air
temperature is within the range of 50°F to
100°F.
17. 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.
18. Press the MENU Key on the front panel of
the C-MORE until Combustion Cal Menu
appears on the C-More display.
19. Press the ▲ arrow key until SET Valve
Position appears on the C-MORE display.
20. Press the CHANGE key. SET Valve Position
will begin to flash.
21. Press the ▲ arrow key until the SET Valve
Position reads 60%. Press the ENTER key.
22. Next, press the down (▼) arrow key until
CAL Voltage 60% is displayed.
23. Press the CHANGE key and observe that
CAL Voltage 60% is flashing.
24. 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.
Combustion Oxygen Level at
60% Valve Position
Oxygen %
± 0.2
Carbon
Monoxide NOx
5.0 % <50 ppm <30 ppm
25. 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.
26. Once the oxygen level is within the specified
range at 60%, press the ENTER key to store
the selected blower output voltage for 60%
valve position.
NOTE
The remaining steps basically repeat the
procedures in steps 19 through 26 for
valve positions of 45%, 30% and 16%.
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.
4-7