Watts Benchmark Aerco OMM-0122 - Page 69

Benchmark 750-3000 Boiler Installation & Startup Manual
SECTION 4 – INITIAL START-UP
OMM-0121_D • GF-205 • 5/9/2019 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 69 of 122
PROPANE Combustion Calibration Instructions
29. Use the Down ▼arrow key to lower the valve position to one of the following:
• BMK 750P & 1000P: 80%
• BMK 1500/2000/2500 DF & P: 70%
• BMK 3000 DF & P: 85%
NOTE:
Remaining combustion calibration steps are performed using the Combustion Cal menu in
the C-More Controller. The combustion calibration control functions will be used to adjust
the oxygen level (%) at valve position percentages described in the steps below. These
instructions assume that the inlet air temperature is between 50°F and 100°F (10°C –
37.8°C). If NO
x
readings exceed the target values in Table 4-5, above, increase the O
2
level
up to 1% higher than the listed calibration range. Record the increased O
2
value on the
Combustion Calibration sheet.
30. Repeat steps 21 through 25 for valve positions shown in Table 4-6. The oxygen (O
2
),
nitrogen oxide (NO
x
) and carbon monoxide (CO) should stay within the ranges shown
Table 4-6.
TABLE 4-6: PROPANE Final Valve Positions: BMK 750 – 3000
Valve Position Oxygen (O
2
) % Nitrogen oxide (NO
x
) Carbon Monoxide (CO)
BMK 750/1000
80%
5.5% ± 0.2%
<100 ppm
<150 ppm
60%
5.5% ± 0.2%
<100 ppm
<150 ppm
45%
5.5% ± 0.2%
<100 ppm
<150 ppm
30%
6.3% ± 0.2%
<100 ppm
<100 ppm
18%
5.5% ± 0.2%
<100 ppm
<100 ppm
BMK 1500
70%
5.2% ± 0.2%
<100 ppm
<150 ppm
50%
5.3% ± 0.2%
<100 ppm
<150 ppm
40%
6.2% ± 0.2%
<100 ppm
<150 ppm
30%
7.0% ± 0.2%
<100 ppm
<100 ppm
18%
8.5% ± 0.2%
<100 ppm
<100 ppm
BMK 2000
70%
6.5% ± 0.2%
<100 ppm
<150 ppm
50%
6.5% ± 0.2%
<100 ppm
<150 ppm
40%
6.5% ± 0.2%
<100 ppm
<150 ppm
30%
6.5% ± 0.2%
<100 ppm
<100 ppm
18%
5.5% ± 0.2%
<100 ppm
<100 ppm
BMK 2500
70%
5.4% ± 0.2%
<100 ppm
<150 ppm
45%
5.6% ± 0.2%
<100 ppm
<150 ppm
30%
6.0% ± 0.2%
<100 ppm
<150 ppm
22%
5.8% ± 0.2%
<100 ppm
<100 ppm
18%
6.0% ± 0.2%
<100 ppm
<100 ppm