AERCO Innovation (G-14-2265 and above) - Manual (Page 60)

Innovation Water Heaters Installation, Operation & Maintenance Manual
CHAPTER 4 – INITIAL START-UP
Page 60 of
206 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
OMM-0078_0L
PRI: 11/25/2014
Phone: 800-526-0288
GF-128
It is important to perform the calibration procedure as outlined in the following steps. This will
keep readjustments to a minimum and provide optimum performance.
PROPANE Combustion Calibration
1. Open the water supply and return valves to the unit and ensure that the system pumps are
running.
2. Open the propane gas supply valve(s) to the unit.
3. Set the control panel ON/OFF switch to the OFF position.
4. Turn on external AC power to the unit. The display will show LOSS OF POWER and the
time and date.
5. Set the unit to the Manual Mode by pressing the AUTO/MAN key. A flashing Manual Valve
Position message will be displayed with the present position in %. Also, the MANUAL LED
will light.
6.
Adjust the air/fuel valve position to 0% by pressing the ▼ arrow key.
7. Ensure that the leak detection ball valve downstream of the SSOV is open.
8. Set the ON/OFF switch to the ON position.
9.
Change the valve position to 29% using the ▲ arrow key. The unit should begin its start
sequence and fire.
10. Next, verify that the gas pressure downstream of the SSOV is within the appropriate range
shown below for the Innovation Model being tested. If gas pressure adjustment is required,
remove the brass hex nut on the SSOV actuator to access the gas pressure adjustment
screw (Figure 4-4). Make gas pressure adjustments using a flat-tip screwdriver to obtain a
gas pressure reading within the required range for the INN model being tested.
PROPANE Gas Pressure Range Downstream Of SSOV
Model Gas Pressure Range
Innovation 1350 2.0” – 2.2” W.C.
Innovation 1060 1.8” – 2.0” W.C.
Innovation 800 2.8” – 3.0” W.C.
Innovation 600 1.6” – 1.8” W.C.
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), nitrogen oxide (NOx) and flame strength readings are within the
values shown.
Combustion Oxygen Level at 16% Valve Position
Oxygen % ± 0.5 Carbon Monoxide NOx Flame Strength
6.0 % <50 ppm <15 ppm >2.0 µA