10.1Commissioning Checklist
1.Be sure the water heater tank is filled with water before commissioning the burner.
2.Check the combustion air, venting and gas supply complies with the Section 4, “Combustion and Ventilation Air”, Section 5, “Venting”, and Section 6 “Gas Supply and Piping”.
3.Check burner wiring.
Check that 120VAC is coming into the burner.
Check that the burner is properly grounded using a ground wire.
Check the polarity to the burner is correct. (To check polarity: Set a multimeter to VAC. Touch L1 to one of the probe tips and ground to the other. If a voltage between 110 and 125 is shown then it has the correct polarity; if any other reading is shown, then check the L2 wire. If the L2 wire shows a voltage between 110 and 125 is shown then the polarity to the burner is reversed.)
4.Check that the orifice is installed. All
5.Install monometers at the inlet pressure tap and manifold pressure tap on the burner.
Check the gas pressure at the gas valve inlet pressure tap (line pressure). This pressure must be within the minimum and maximum gas pressures printed on the burner data decal, both when the burner is firing and when it is not firing. If the pressure drops and then surges back up, double check the piping, because it means the gas supply is probably undersized.
Record the static incoming gas pressure. When the burner lights off, record the running incoming gas pressure; the incoming gas pressure must never be above or below the minimum and maximum pressures shown on the burner information decal, whether the burner is firing or not.
Check the manifold pressure at the manifold pressure tap located on top of the silver elbow attached to the burner head. Note: When checking manifold pressure, do not subtract burner housing pressure during
10.2Adjusting Burner Using Combustion Analyzer
While the burner is firing and with a combustion analyzer sampling flue products in the vent near the burner, adjust the gas pressure regulator as required to match the manifold pressure shown on the burner data decal. If adjustments need to be made, remove the cap screw and adjust the pressure regulator. Screwing the regulator clockwise will increase the manifold pressure and
Adjust the air shutter as necessary to obtain a CO2 reading between 8% and 9.5% for Natural gas and 9.5% to 10.5% for LP gas (O2 between 4.5% and 7.0%). Carbon monoxide levels should be below 200 ppm (less than 100 ppm is preferred). If air shutter adjustment is needed, rotate the air adjustment screw clockwise to open the air shutter or
Continue to adjust the burner’s gas regulator and air shutter until the manifold pressure matches the value shown on the burner data decal and CO2 (or O2) and Carbon Monoxide is within the range specified above.
10.3Adjusting Burner Head
Do not change the factory setting of the burner head, except as directed in Section 12, Troubleshooting.
If directed to change the burner head position number, with the burner firing and with a combustion analyzer inserted in the flue and a manometer attached to the manifold pressure tap, use an allen wrench to rotate the head adjustment screw clockwise to increase the burner head position number or rotate
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