Propane Gas Combustion Calibration - Watts AERCO Benchmark OMM-0136 Operation And Service Manual

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: 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%
6.0% ± 1.0%
18% 18%
Note: BMK6000 Low Gas Pressure (LGP) Models do 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.

4.4.2 PROPANE GAS COMBUSTION CALIBRATION

These instructions apply only to units running PROPANE gas.
PROPANE Combustion Calibration Instructions
1. Set the Edge Controller's Enable/Disable switch to Disable.
2. Open the water supply and return valves to the unit and ensure that the system pumps are
running.
3. Open the PROPANE supply valve to the unit.
4. Turn external AC power to the unit ON.
5. On the Controller, go to: Main Menu → Calibration → Manual Combustion. If necessary,
enter a technician level password.
6. The first Manual Combustion Calibration screen appears lists three steps that must be
completed before continuing:
OMM-0137_E • GF-211 •
12/13/2019
Standard NO
x
O % NO
2 x
<20 ppm 6.0% ± 1.0%
<20 ppm 6.0% ± 1.0%
<20 ppm 6.0% ± 1.0%
<20 ppm 6.0% ± 1.0%
<20 ppm 6.5% ± 1.5%
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
Ultra-Low NO
x
O % NO
2 x
≤9 ppm
≤9 ppm
≤9 ppm
≤9 ppm
≤9 ppm
CO
<100 ppm
<100 ppm
<50 ppm
<50 ppm
<50 ppm
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