Watts AERCO Benchmark BMK5000 Operation And Service Manual page 47

Benchmark Platinum-Edge [ii]: Operation-Service Manual
SECTION 4 – INITIAL START-UP
NATURAL GAS Manual Combustion Calibration Instructions
TABLE 4-3g: NATURAL GAS Final Valve Positions: BMK4000/5000N Dual Fuel
Valve Position
70% 5.5% ± 0.2%
50% 5.5% ± 0.2%
40% 5.5% ± 0.2%
30% 5.5% ± 0.2%
18% 5.5% ± 0.2%
TABLE 4-3h: NATURAL GAS Final Valve Positions: BMK5000, Single & DF
Valve Position
Dual
Single
Fuel
Fuel
5.5% ± 0.5%
70%
50% 5.5% ± 0.5%
5.5% ± 0.5%
40%
30% 5.5% ± 0.5%
18% 6.0% ± 1. 0%
NOTE: BMK5000 Low Gas Pressure (LGP) Model does not offer Ultra Low
TABLE 4-3i: NATURAL GAS Final Valve Positions: BMK6000, Single & DF
Valve Position
Single Dual
Fuel Fuel
5.5% ± 0.5%
70% 85%
50% 65% 5.5% ± 0.5%
40% 45% 5.5% ± 0.5%
30% 30% 5.5% ± 0.5%
18% 18% 6.0% ± 1.0%
NOTE: BMK6000 Low Gas Pressure (LGP) Model does not offer Ultra Low NOx settings.
26. If the oxygen level at the lowest 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 screw 1/2 turn clockwise (CW) to add fuel and reduce
the O to the specified level. Recalibration MUST be performed again from 60% or 50%
2
down to the lowest valve position after making a change to the TAC screw.
This completes the NATURAL GAS combustion calibration procedure.
OMM-0137_J •
12/20/2022
Standard NO
x
O % NO
2 x
≤20 ppm
≤20 ppm
≤20 ppm
≤20 ppm
≤20 ppm
Standard NOx
O % NOx
2
<20 ppm
<20 ppm
<20 ppm
<20 ppm
<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
Ultra-Low NO
x
O % NO
2
≤9 ppm
6.0% ± 0.2%
≤9 ppm
6.5% ± 0.2%
≤9 ppm
6.5% ± 0.2%
≤9 ppm
6.5% ± 0.2%
≤9 ppm
5.5% ± 0.2%
Ultra-Low NOx
O % NOx
2
≤9 ppm
6.0% ± 1.0%
≤9 ppm
6.0% ± 1.0%
≤9 ppm
6.0% ± 1.0%
≤9 ppm
6.0% ± 1.0%
≤9 ppm
6.5% ± 1.5%
Ultra-Low NOx
O % NOx
2
≤9 ppm
6.0% ± 1.0%
≤9 ppm
6.0% ± 1.0%
≤9 ppm
6.0% ± 1.0%
≤9 ppm
6.0% ± 1.0%
≤9 ppm
6.5% ± 1.5%
CO
x
<100 ppm
<100 ppm
<50 ppm
<50 ppm
<50 ppm
CO
<100 ppm
<100 ppm
<50 ppm
<50 ppm
<50 ppm
settings.
NOx
CO
<100 ppm
<100 ppm
<50 ppm
<50 ppm
<50 ppm
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