Watts AERCO Benchmark BMK750 Operation And Service Manual page 63

Benchmark with Edge [I]: Operation-Maintenance Manual
SECTION 4 – INITIAL START-UP
PROPANE Combustion Calibration Instructions
TABLE 4-4: PROPANE Gas Pressure Range @ 100% Fire Rate
Model
BMK750P
BMK1000P
1500DF & 1500P
2000DF & 2000P
2500DF & 2500P
3000DF & 3000P
5000DF & 5000P
6000DF & 6000P
16. With the valve position still at 100%, insert the combustion analyzer probe into the exhaust
manifold probe opening (see Figure 4-2a – 4-2c in Section 4.2.3) and allow enough time
for the combustion analyzer reading to stabilize.
17. Compare the combustion analyzer's oxygen (O
column (Figure 4-9). If they differ, go to the
Oxygen Sensor
board O sensor match the value from the combustion analyzer. If your combustion
2
analyzer is correctly calibrated, and the on-board O
analyzer, the sensor may be defective and need to be replaced.
18. Compare the O
2
Blower Voltage until the O
press on the field and type the value directly.
19. If adjusting the blower voltage is not sufficient to get the O
Target column, then repeat Step 15 to adjust the gas pressure up or down within the range
shown in the table, then repeat Step 18. Continue repeating Steps 15 and 18 until the gas
pressure is within the range in Table 4-4 and the O
Target column.
20. Enter the downstream manometer's gas pressure reading in the Downstream Gas
Pressure field. Note, this field appears only when Valve Position % = 100%.
21. Compare the measured nitrogen oxide (NOx) and carbon monoxide (CO) readings to the
Target values (shown in the Table 4-5 as a reference only). If you are not in a "NOx-
limited" area and/or do not have a NOx measurement in your analyzer, set the O
value in the Oxygen (O
TABLE 4-5: PROPANE Calibration Readings at 100% Valve Position
Model
750 & 1000
1500
2000
2500
3000
5000
6000
OMM-0145_A99 • GF-218 •
Nominal Gas Pressure
3.9" W.C. ± 0.2" W.C. (0.97 kPa ± 0.05 kPa)
7.6" W.C. ± 0.2" W.C. (1.89 kPa ± 0.05 kPa)
1.4" W.C. ± 0.1" W.C. (0.35 kPa ± 0.02 kPa)
2.5" W.C. ± 0.1" W.C. (0.62 kPa ± 0.02 kPa)
2.0" W.C. ± 0.1" W.C. (0.50 kPa ± 0.02 kPa)
1.6" W.C. ± 0.1" W.C. (0.40 kPa ± 0.02 kPa)
2.0" ± 0.2" W.C. (0.50 to 0.05 kPa)
4.2" ± 0.2" W.C. (1.05 to 0.05 kPa)
screen and adjust the O2 Offset parameter, up to ±3%, to make the on-
value in the Target and Reading columns. If they don't match, adjust the
value in both columns match; use either the + or – controls, or
2
) % column in the table below.
2
Oxygen (O ) % Nitrogen Oxide (NOx)
2
5.5% ± 0.2%
5.2% ± 0.2%
6.0% ± 0.2%
5.0% ± 0.2%
5.2% ± 0.2%
5.5% ± 0.5%
5.0% ± 0.5%
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
9/18/2019
) reading to the O
2
Main Menu → Calibration → Input/Output →
sensor cannot be made to match the
2
Reading column to match the
2
Reading column to matches the
2
Carbon Monoxide (CO)
≤100 ppm
≤100 ppm
≤100 ppm
≤100 ppm
≤100 ppm
≤100 ppm
≤100 ppm
value in the Reading
2
to the
2
<150 ppm
<150 ppm
<150 ppm
<150 ppm
<150 ppm
<100 ppm
<100 ppm
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