Innovation Hot Water Hot Water Boiler User Manual
- INTERNATIONAL
CHAPTER 4 – INITIAL START-UP
Page
54
of
174
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
OMM-0120_0A
11/15/2016
Phone: 800-526-0288
GF-128-I
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
Gas Pressure Range
Innovation 800
1.5” – 1.7” W.C. (374 – 423 Pa)
Innovation 1060
2.6” – 2.8” W.C. (648 – 697 Pa)
Innovation 1350
3.0” – 3.2” W.C. (747 – 797 Pa)
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
2
)
level, carbon monoxide (CO), nitrogen oxide (NOx) and flame
strength readings with the range
shown in step 22, below.
You may need to adjust O
2
%
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.
17.
Press the Up
▲ arrow key until the
SET
Stdby V Out (Standby Voltage)
setting appears.
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.
18.
Press the ▲ arrow key until
Set Valve Position
reads
100%
, then press the
ENTER
key.
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.
21.
If the oxygen level is not within the specified range, adjust the level using the ▲ and ▼
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.
BRASS HEX
HEAD CAP
(Remove to access gas pressure
adjustment screw)
