Combustion At The Gas Valve Display - Bradford White OmniTech BONH1250 Installation And Operation Instructions Manual
Category ii and iv venting with touchscreen controls
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11.E.2 Combustion at the Gas Valve Display
2. Measure the combustion product to determine if the CO 2 levels fall in the ranges listed in the table. If the
CO 2 level is out of range adjust the CO 2 by using the gas valve display and the process below.
a.
Using the gas valve display Navigate to Home > Valve 1 > Settings > Fuel Air Ratio & Ignition >
Correction curve.
b.
Login to the gas valve. See Gas valve password and login section for detailed instructions.
Press Start point commissioning.
c.
d.
Adjust CO 2 levels according to Table 19. Touch lean arrows to decrease CO 2 . Touch Rich arrows to
increase CO 2 . Double arrows move the CO 2 richer or leaner faster than single arrows. In most cases
touching the double arrows is acceptable when adjusting the CO 2 .
e.
When the CO 2 level is set correctly
max if setting the maximum point or Add Generic if setting a point between min and max. If the point
added or modified is close to another point on the correction curve the system will ask if overwriting
the existing point is ok.
f.
In some cases it may be necessary to delete the original curve points. To do this select the Deletion
tab. Select the point that should be deleted. The point selected will be highlighted on the correction
curve. Press Delete point.
3. Repeat this process until all RPMs identified have been setup.
Air supply temperature
Between
40 - 100
Below
Above
Table 19. CO 2 levels at various air supply temperatures
press set min if setting the min modulation point, press set
Fº
Cº
4 - 38
39
4
101
38
CO 2 level
%
8.5
8
9
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