Watts AERCO Benchmark BMK5000 Operation And Service Manual page 45

Benchmark Platinum-Edge [ii]: Operation-Service Manual
SECTION 4 – INITIAL START-UP
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 level is within the specified range at 100%:
2
•
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
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
shown in these tables.
TABLE 4-3a: NATURAL GAS BMK Final Valve Positions: BMK750/1000
Valve Position
Single Fuel Dual Fuel
80% 70%
60% 60%
45% 40%
30% 30%
18% 18%
TABLE 4-3b: NATURAL GAS Final Valve Positions: BMK1500-2000
Valve Position
1500 2000
70% 6.0% ± 0.2%
50% 6.3% ± 0.2%
40% 7.0% ± 0.2%
30% 7.0% ± 0.2%
16% 18% 7.0% ± 0.2%
OMM-0137_J •
12/20/2022
value, on the Combustion Calibration Data Sheet
2
Standard NOx
O % NOx
2
5.5% ± 0.2% ≤20 ppm
5.5% ± 0.2% ≤20 ppm
5.5% ± 0.2% ≤20 ppm
5.5% ± 0.2% ≤20 ppm
5.5% ± 0.2% ≤20 ppm
Standard NOx
O % NOx
2
≤20 ppm
≤20 ppm
≤20 ppm
≤20 ppm
≤20 ppm
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
, NOx and CO should stay within the ranges
2
Ultra-Low NOx
O %
2
6.0% ± 1.0%
6.0% ± 1.0%
6.0% ± 1.0%
6.0% ± 1.0%
6.0% ± 1.0%
Ultra-Low NOx
O % NOx
2
≤9 ppm
5.5% ± 1.0%
≤9 ppm
5.8% ± 1.0%
≤9 ppm
6.0% ± 1.0%
≤9 ppm
6.0% ± 1.0%
≤9 ppm
8.0% ± 1.0%
CO
NOx
≤9 ppm
<100 ppm
≤9 ppm
<100 ppm
≤9 ppm
<50 ppm
≤9 ppm
<50 ppm
≤9 ppm
<50 ppm
CO
<100 ppm
<100 ppm
<50 ppm
<50 ppm
<50 ppm
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