Watts Aerco Benchmark OMM-0124 Installation And Start-Up Manual page 57

Benchmark 5000-6000 Boiler Installation & Startup Manual
SECTION 4: INITIAL START-UP
PROPANE Combustion Calibration Instructions
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 readings exceed the target values in Table 4-5, above, increase the O
x
up to 1% higher than the listed calibration range. Record the increased O
Combustion Calibration sheet.
29. Repeat steps 21 through 25 for valve positions shown in Table 4-6a and 4-6b. The O
and CO should stay within the ranges shown in the tables.
TABLE 4-6a: PROPANE Final Valve Positions: BMK 5000
Valve Position
Single-Fuel Dual-Fuel
70%
50%
40%
30%
18%
TABLE 4-6b: PROPANE Final Valve Positions: BMK 6000
Valve Position
Single-Fuel Dual-Fuel
70% 85%
50% 65%
40% 45%
30% 30%
18% 18%
NOTE:
If NO readings exceed the target values in Table 4-6, increase the O
x
than the range shown in the table. Record the increased O
Calibration sheet.
30. If the oxygen level at the 18% valve position is too high and the Blower voltage is at the
minimum value, you can adjust the TAC screw, which is recessed in the top of the Air/Fuel
Valve (see Figure 4-3). Rotate the TAC screw 1/2 turn clockwise (CW) to add fuel and
reduce the O to the specified level. Recalibration MUST be performed again from 50%
2
down to the lowest valve position after making a change to the TAC screw.
This completes the PROPANE gas combustion calibration procedure.
OMM-0123_E • GF-207 • 12/17/2019
Nitrogen Oxide
Oxygen (O ) %
2
5.5% ± 0.5% <100 ppm
5.5% ± 0.5% <100 ppm
5.5% ± 0.5% <100 ppm
5.5% ± 0.5% <100 ppm
6.0% ± 1.0% <100 ppm
Nitrogen Oxide
Oxygen (O ) %
2
5.5% ± 0.5% <100 ppm
5.5% ± 0.5% <100 ppm
5.5% ± 0.5% <100 ppm
5.5% ± 0.5% <100 ppm
6.0% ± 1.0% <100 ppm
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
2
Carbon
(NO ) Monoxide (CO)
x
<150 ppm
<150 ppm
<150 ppm
<150 ppm
<150 ppm
Carbon
(NO ) Monoxide (CO)
x
<150 ppm
<150 ppm
<150 ppm
<150 ppm
<150 ppm
level up to 1% higher
2
value on the Combustion
2
level
2
value on the
, NO
2 x
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