Base Curve Menu; Correction Curve Menu - Bradford White OmniTech BONH1250 Installation And Operation Instructions Manual
Category ii and iv venting with touchscreen controls
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9.D.3
Base Curve Menu
Controls the base A/F ratio curves. These values are set at the factory and can not be adjusted in the field.
9.D.4
Correction Curve Menu
Allows for adjustment of the A/F ratio by the installer. To adjust the A/F curves follow the steps provided.
1.
Set the desired fan speed.
2.
Measure the CO 2 with an analyzer.
3.
Start point commissioning
4.
Adjust CO 2 levels. Touch the 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 .
5.
When the CO 2 level is set correctly press set min if setting the min modulation point, press set max if setting
the maximum point, or commission point if setting a point between min and max.
6.
Repeat this process until five points have been setup through the modulation range.
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