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Benchmark Platinum-Edge [ii]: Operation-Service Manual
SECTION 4
– INITIAL START-UP
OMM-0137_J
• 12/20/2022 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page
45
of
167
NATURAL GAS Manual Combustion Calibration Instructions
22. On Benchmark 3000 - 6000 units
only
, record the manifold (downstream) gas pressure at
100%. This value will be used in Section 5.2.2:
Low Pressure Gas Test
, and Section 5.3.2:
High Pressure Gas Test
.
23. Once the O
2
level is within the specified range at 100%:
•
Enter the
Flame Strength
,
NOx
and
CO
readings from the Combustion Analyzer and
multi-meter
in the Manual Combustion Calibration screen’s
Reading
column.
•
Enter the same values, plus the
O
2
value, on the Combustion Calibration Data Sheet
provided with the unit.
24. Lower the Valve Position to the next calibration point using the
(Left) arrow key (if using
Method 1 in step 11) or the Fine Valve Position
–
(Minus) key (if using Method 2).
•
BMK750 & 1000:
80%
•
BMK1500
– 6000:
70%
25. Repeat step 17, 18 and 21 at that valve position and the rest of the valve positions in Table
below corresponding to your model.
The O
2
, NOx and CO should stay within the ranges
shown in these tables.
TABLE 4-3a: NATURAL GAS BMK Final Valve Positions: BMK750/1000
Valve Position
Standard NOx
Ultra-Low NOx
CO
Single Fuel Dual Fuel
O
2
%
NOx
O
2
%
NOx
80%
70%
5.5% ± 0.2%
≤20 ppm
6.0% ± 1.0%
≤9 ppm <100 ppm
60%
60%
5.5% ± 0.2%
≤20 ppm
6.0% ± 1.0%
≤9 ppm <100 ppm
45%
40%
5.5% ± 0.2%
≤20 ppm
6.0% ± 1.0%
≤9 ppm
<50 ppm
30%
30%
5.5% ± 0.2%
≤20 ppm
6.0% ± 1.0%
≤9 ppm
<50 ppm
18%
18%
5.5% ± 0.2%
≤20 ppm
6.0% ± 1.0%
≤9 ppm
<50 ppm
TABLE 4-3b: NATURAL GAS Final Valve Positions: BMK1500-2000
Valve Position
Standard NOx
Ultra-Low NOx
CO
1500
2000
O
2
%
NOx
O
2
%
NOx
70%
6.0% ± 0.2%
≤20 ppm
5.5% ± 1.0%
≤9 ppm
<100 ppm
50%
6.3% ± 0.2%
≤20 ppm
5.8% ± 1.0%
≤9 ppm
<100 ppm
40%
7.0% ± 0.2%
≤20 ppm
6.0% ± 1.0%
≤9 ppm
<50 ppm
30%
7.0% ± 0.2%
≤20 ppm
6.0% ± 1.0%
≤9 ppm
<50 ppm
16%
18%
7.0% ± 0.2%
≤20 ppm
8.0% ± 1.0%
≤9 ppm
<50 ppm