CHAPTER 4: INITIAL START-UP
PR2: 04/22/13 Page
47
of
158
Benchmark 2.0LN Dual-Fuel Low NOx Boiler
Operation and Maintenance Manual
OMM-0052_0E
GF-127
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
•
Ph: 800-526-0288
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 80%, press the ENTER key to
store the selected blower output voltage for the 80% valve position.
NOTE
The remaining steps basically repeat the procedures in steps 19
through 26 for valve positions of 60%, 45%, 30% and 20%.
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.
27.
Press the ▲ arrow key until
SET Valve Position
appears on the C-MORE display.
28. Press the
CHANGE
key.
SET Valve Position
will begin to flash.
29.
Press the ▼ arrow key until the
SET Valve Position
reads
60%
and press the
ENTER
key.
30.
Press the down ▼ arrow key until
CAL Voltage 60%
is displayed.
31. Press the
CHANGE
key.
CAL Voltage 60%
will begin to flash.
32. 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.
Table 4-3: Combustion Oxygen Levels for a
60%
Air/Fuel Valve Position
Oxygen %
± 0.2
Carbon Monoxide
NOx
6.0 %
<100 ppm
<20 ppm
33.
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 ▼ arrow
key decreases the oxygen level.
34. Once the oxygen level is within the specified range at 60%, press the ENTER key to
store the selected blower output voltage for the 60% valve position.
35.
Press the ▲ arrow key until
SET Valve Position
appears on the C-MORE display.
36. Press the CHANGE key.
SET Valve Position
will begin to flash.
37.
Press the ▼ arrow key until the
SET Valve Position
reads
45%
, then press the ENTER
key.
38.
Press the ▼ arrow key until
CAL Voltage 45%
is displayed.
39. Press the CHANGE key.
CAL Voltage 45%
will begin to flash.
40. The oxygen level at the 45% 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.
