AERCO BMK 3.0 LN Dual Fuel APRIL 2009 - Manual (Page 36)

INITIAL START-UP
16. If necessary, adjust the iris air damper
shown in Figure 4-5 until the oxygen level is
within the range specified in Table 4-1.
17. Once the oxygen level is within the specified
range at 100%, lower the firing rate to 70%.
Figure 4-5
Iris Air Damper Location/Adjustment
NOTE
The remaining combustion calibration
steps utilize the Variable Frequency Drive
(VFD) located behind the front door of the
unit. The VFD up (Λ) and down (V) arrow
keys will be used to adjust the oxygen
level (%) at firing rates of 85%, 65%,
45%, 30% and 18% as described in the
following steps.
18. Locate the Variable Frequency Drive (VFD)
behind the front door of the unit (Figure 4-3).
Refer to the VFD operating controls shown
in Figure 4-6.
Figure 4-6
VFD Controls and Displays
IMPORTANT
In the following steps, the values
appearing in the right part of the VFD
display for parameters 65, 64, 63, 62, 61
represent the base frequency (Hz) x 10.
For example: a displayed value of 528
corresponds to a frequency of 52.8 Hz.
19. Press the M (Menu) programming key on
the VFD.
20. Using the up (Λ) arrow key, select VFD
parameter 65. The selected parameter will
appear in the left part of the display and the
frequency (Hz) will appear in the right part of
the display (see IMPORTANT note above).
21. With the selected VFD parameter display
flashing, press the M key. Code will be
displayed, requesting the valid code to be
entered. Enter code 59 using the arrow
keys. Press the M key again to store the
valid code.
22. With parameter 65 displayed in the left part
of the VFD display, observe the oxygen level
(%) on the Combustion Analyzer. The
oxygen level at the 85% firing rate should be
as shown in the following tabular listing.
Also, ensure that the carbon monoxide (CO)
and nitrogen oxide (NOx) readings do not
exceed the values shown.
Combustion Oxygen Level at
85% Firing Rate
Oxygen %
± 0.2
Carbon
Monoxide NOx
6.0 % <100 ppm <30 ppm
4-4