AERCO Innovation (G-14-2265 and above) - Manual (Page 59)

Innovation Water Heaters Installation, Operation & Maintenance Manual
CHAPTER 4 – INITIAL START-UP
OMM-0078_0L
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Page 59 of
206
GF-128
Phone: 800-526-0288
PRI: 11/25/2014
NATURAL GAS Combustion Calibration – Continued
Combustion Calibration Readings
Valve
Position
Oxygen (O
2
) %
Nitrogen
Oxide (NOx)
Carbon
Monoxide (CO)
Flame
µA
80% 6.5% ± 0.2% <20 ppm <100 ppm > 6
60% 7.5% ± 0.2% <20 ppm <100 ppm > 6
50% 8.0% ± 0.2% <20 ppm <100 ppm > 6
40% 8.0% ± 0.2% <20 ppm <100 ppm > 6
30% 8.3% ± 0.2% <20 ppm <100 ppm > 5
20% 8.0% ± 0.2% <20 ppm <100 ppm > 4
16% 5.8% ± 0.2% <20 ppm <100 ppm > 4
23. If the oxygen level at the 16% valve position is too high and the Blower voltage is at the
minimum value, you can adjust the idle screw (TAC valve), which is recessed in the top of
the Air/Fuel Valve. Rotate the screw 1/2 turn clockwise (CW) to add fuel and reduce the O
2
to the specified level. Recalibration MUST be performed again from 60% down to 16% after
making a change to the idle screw (TAC valve).
Figure 4-5. TAC Valve Adjust (Idle Screw)
This completes the NATURAL GAS combustion calibration procedure.
4.4 PROPANE COMBUSTION CALIBRATION
IMPORTANT
The unit is shipped from the factory set up for either Natural Gas or Propane as
specified by the Style Number on the Sales Order. Complete the instructions
below only if your unit has been set up to run on Propane.
The Innovation Heater is combustion calibrated at the factory prior to shipping. However,
recalibration as part of initial start-up is necessary due to changes in the local altitude, gas BTU
content, gas supply piping and supply regulators. Start-Up & Registration Test Data sheets are
shipped with each unit. These sheets must be filled out and returned to AERCO for proper
Warranty Validation.
TAC VALVE
IDLE SCREW