CHAPTER 4: INITIAL START-UP
Page
48
of
158
PR2: 04/22/13
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
Table 4-4: Combustion Oxygen Levels for a
45%
Air/Fuel Valve Position
Oxygen %
± 0.2
Carbon Monoxide
NOx
6.4 %
<50 ppm
<20 ppm
41. 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.
42. Once the oxygen level is within the specified range at 45%, press the ENTER key to
store the selected blower output voltage for the 45% valve position.
43.
Press the ▲ arrow key until
SET Valve Position
appears on the C-MORE display.
44. Press the CHANGE key.
SET Valve Position
will begin to flash.
45.
Press the ▼ arrow key until the
SET Valve Position
reads
30%
, then press the ENTER
key.
46.
Press the ▼ arrow key until
CAL Voltage 30%
is displayed.
47. Press the CHANGE key.
CAL Voltage 30%
will begin to flash.
48. The oxygen level at the 30% 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 4-5: Combustion Oxygen Levels for a
30%
Air/Fuel Valve Position
Oxygen %
± 0.2
Carbon Monoxide
NOx
8.4 %
<50 ppm
<20 ppm
49.
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.
50. Once the oxygen level is within the specified range at 30%, press the
ENTER
key to
store the selected blower output voltage for 30% valve position.
51.
Press the ▲ arrow key until
SET Valve Position
appears on the C-MORE display.
52. Press the
CHANGE
key.
SET Valve Position
will begin to flash.
53.
Press the ▼ arrow key until the
SET Valve Position
reads
20%
, then press the
ENTER
key.
54.
Press the ▼ arrow key until
CAL Voltage 18%
is displayed.
55. Press the
CHANGE
key.
CAL Voltage 20%
will begin to flash.
56. The oxygen level at the 20% 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 4-6: Combustion Oxygen Levels for a
20%
Air/Fuel Valve Position
