AERCO Innovation (G-14-2265 and above) - Manual (Page 200)

Innovation Water Heaters Installation, Operation & Maintenance Manual
APPENDIX J – COMBUSTION CALIBRATION (KOREA ONLY)
Page 200 of 206 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0078_0L
PRI: 11/25/2014 Phone: 800-526-0288 GF-128
Natural Gas Combustion Calibration – Continued
Figure J-1. Gas Pressure Adjustment Screw Location
11.
Next, decrease the valve open position to 16% using the ▼ arrow key. Verify that the gas
pressure at the inlet of the SSOV is 11.0” W.C. Readjust the inlet gas pressure if
necessary.
12. Insert the combustion analyzer probe into the 1/8” port at the rear of the exhaust manifold.
Allow enough time for the combustion analyzer to settle.
13. Verify that the oxygen (O
2
) level is within the range shown below Also, ensure that the
carbon monoxide (CO) and nitrogen oxide (NOx) readings do not exceed the values
shown.
Combustion Oxygen Level at
16% Valve Position
Oxygen %
± 0.5
Carbon
Monoxide NOx
6.5 % <50 ppm <15 ppm
14. If the oxygen level is not within the required tolerance, the gas pressure on the
downstream side of the SSOV must be adjusted using the adjustment screw on the SSOV
regulator (Figure J-1). Slowly rotate the gas pressure adjustment (approximately 1/4-turn
increments). Allow the combustion analyzer to stabilize following each adjustment.
Clockwise rotation reduces the oxygen level, while counterclockwise rotation increases
the oxygen level.