Watts AERCO Benchmark BMK750 Operation And Service Manual page 65

Benchmark with Edge [I]: Operation-Maintenance Manual
SECTION 4 – INITIAL START-UP
PROPANE Combustion Calibration Instructions
BMK2500
70%
45%
30%
22%
18%
BMK3000
85%
65%
45%
30%
18%
TABLE 4-6b: PROPANE Final Valve Positions: BMK5000 & 6000
Valve Position
Single-Fuel Dual-Fuel
BMK5000
70% 70%
50% 50%
40% 40%
30% 30%
18% 18%
BMK6000
70% 85%
50% 65%
40% 45%
30% 30%
18% 18%
NOTE:
If NOx readings exceed the target values in Table 4-6a and 4-6b, increase the O
1% higher than the listed calibration range shown in the table. Record the increased O
on the Combustion Calibration sheet.
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.
OMM-0145_A99 • GF-218 •
5.4% ± 0.2%
5.6% ± 0.2%
6.0% ± 0.2%
5.8% ± 0.2%
6.0% ± 0.2%
5.2% ± 0.2%
5.4% ± 0.2%
6.0% ± 0.2%
6.4% ± 0.2%
6.4% ± 0.2%
Oxygen (O ) %
2
5.5% ± 0.5%
5.5% ± 0.5%
5.5% ± 0.5%
5.5% ± 0.5%
6.0% ± 1.0%
5.5% ± 0.5%
5.5% ± 0.5%
5.5% ± 0.5%
5.5% ± 0.5%
6.0% ± 1.0%
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
9/18/2019
<100 ppm
<100 ppm
<100 ppm
<100 ppm
<100 ppm
<100 ppm
<100 ppm
<100 ppm
<100 ppm
<100 ppm
Nitrogen Oxide
(NO )
x
<100 ppm
<100 ppm
<100 ppm
<100 ppm
<100 ppm
<100 ppm
<100 ppm
<100 ppm
<100 ppm
<100 ppm
<150 ppm
<150 ppm
<100 ppm
<100 ppm
<100 ppm
<150 ppm
<150 ppm
<150 ppm
<100 ppm
<100 ppm
Carbon
Monoxide (CO)
<150 ppm
<150 ppm
<150 ppm
<150 ppm
<150 ppm
<150 ppm
<150 ppm
<150 ppm
<150 ppm
<150 ppm
level up to
2
value
2
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