AERCO BMK 3.0 LN Dual Fuel June 2010 - Manual (Page 35)

INITIAL START-UP
8. Ensure that the Fuel Selector Switch (Figure
4-3 is in the NATURAL GAS position. In
addition, ensure that the Fuel Type option in
the Configuration Menu (Table 3-4) is set to
Natural Gas
.
9. Set the ON/OFF switch on the unit control
panel to the ON position.
POWER
BOX
CONTROL
PANEL
I/O BOX
TRANSFORMER
(460 VAC UNITS ONLY)
VFD
FUEL
SELECTOR
SWITCH
Figure 4-3
Front View With Door Removed
10. Access the control panel Configuration
Menu (Table 3-4) and ensure that the Max
Valve Position is set to 100%. (Refer to
Chapter 3, para. 3.3 for instructions on
changing menu options).
11. Change the valve position to 29% using the
▲ arrow key. The unit should begin its start
sequence and fire.
12. Next, increase the valve position to 100%.
Verify that the gas pressure downstream of
the SSOV is 5” W.C. for both FM and IRI
gas trains. If gas pressure adjustment is
required, remove the brass hex head cap on
the SSOV (Figure 4-4). Make gas regulator
adjustments using a short, flat-tip
screwdriver to obtain 5” W.C.
Figure 4-4
Regulator Adjustment Screw Location
13. With the valve position at 100%, insert the
combustion analyzer probe into the flue
probe opening and allow enough time for the
combustion analyzer to settle.
14. Compare the measured oxygen level to the
oxygen range for the inlet air temperature
shown in Table 4-1. Also, ensure that the
carbon monoxide (CO) and nitrogen oxide
(NOx) readings do not exceed the values
shown.
Table 4-1
Combustion Oxygen Levels for a 100%
Valve Position
Inlet Air
Temp
Oxygen %
± 0.2
Carbon
Monoxide NOx
>100°F 4.8 % <100 ppm <30 ppm
90°F 5.0 % <100 ppm <30 ppm
80°F 5.2 % <100 ppm <30 ppm
<70°F 5.3 % <100 ppm <30 ppm
4-3