Watts Aerco Innovation 800 User Manual page 54

Innovation Hot Water Hot Water Boiler User Manual
NATURAL GAS Combustion Calibration - Continued
13. Check that the gas pressure downstream of the SSOV is within the range listed below. If
gas pressure adjustment is required, remove the brass hex nut on the SSOV actuator (see
Figure 4-4) to access the gas pressure adjustment screw. Slowly rotate the screw, in
approximately 1/4-turn increments, clockwise to reduce the oxygen level or
counterclockwise to increase the oxygen level, as needed, to reach the value listed below.
Allow the combustion analyzer to stabilize following each adjustment.
NATURAL GAS Pressure Range Downstream Of SSOV
Model
Innovation 800
Innovation 1060
Innovation 1350
Figure 4-4. SSOV Gas Pressure Adjustment Screw Location
14. If it was removed above, replace the brass hex cap on the SSOV.
15. Compare the oxygen (O
strength readings with the range shown in step 22, below. You may need to adjust O
above this range to meet ultra-low NOx requirements or to avoid combustion tone issues.
16. Press the MENU key on the front panel of the C-More until COMBUSTION CAL MENU
appears on the display.
Press the Up ▲ arrow key until the
17.
Verify that it is set to 2.0 V (the default). AERCO recommends it be kept at 2.0 volts to
prevent flue gas recirculation.
Press the ▲ arrow key until Set Valve Position reads 100%, then press the ENTER key.
18.
19. Press the CHANGE key and observe that CAL VOLTAGE 100% is flashing.
20. The oxygen level at the 100% valve position should be as shown below. Also, ensure that
the nitrogen oxide (NOx), carbon monoxide (CO) and flame strength readings match the
values shown in the table in step 22 below.
If the oxygen level is not within the specified range, adjust the level using the ▲ and ▼
21.
arrow keys. This will adjust the output voltage to the blower motor as indicated on the
display. Press the ▲ arrow key to increase the oxygen level or press the down ▼ arrow
key to decrease the oxygen level.
Page 54 of 174
11/15/2016
CHAPTER 4 – INITIAL START-UP
Gas Pressure Range
1.5" – 1.7" W.C. (374 – 423 Pa)
2.6" – 2.8" W.C. (648 – 697 Pa)
3.0" – 3.2" W.C. (747 – 797 Pa)
) level, carbon monoxide (CO), nitrogen oxide (NOx) and flame
2
SET Stdby V Out (Standby Voltage) setting appears.
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Phone: 800-526-0288
- INTERNATIONAL
BRASS HEX
HEAD CAP
(Remove to access gas pressure
adjustment screw)
OMM-0120_0A
%
2
GF-128-I