Watts AERCO Benchmark OMM-0136 Operation And Service Manual page 48

Benchmark Platinum-Edge [II]: Operation-Service Manual
SECTION 4 – INITIAL START-UP
PROPANE Combustion Calibration Instructions
value in the Target and Reading columns. If they don't match, adjust the
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 Oxygen (O
750 & 1000
1500
2000
2500
3000
5000
6000
NOTE:
These instructions assume that the inlet air temperature is between 50°F and 100°F (10°C
– 37.8°C). If NOx readings exceed the target values in Table 4-4, above, or Table 4-6, below,
increase the O level up to 1% higher than the Target value. You must then record the
2
increased O value on the Combustion Calibration sheet.
2
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).
•
BMK750P & 1000P: 80%
•
BMK1500/2000/2500 DF & P: 70%
•
BMK3000 DF & P: 85%
•
BMK5000P & 6000P: 70%
OMM-0137_E • GF-211 •
12/13/2019
value in both columns match; use either the + or – controls, or
2
) % column in the table below.
2
) % 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%
2
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
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, on the Combustion Calibration Data Sheet
to the
2
<150 ppm
<150 ppm
<150 ppm
<150 ppm
<150 ppm
<100 ppm
<100 ppm
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