D.1; D.1.A Ch1 (Central Heat, One) - Bradford White OmniTech BONH1250 Installation And Operation Instructions Manual
Category ii and iv venting with touchscreen controls
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8.D.1
CH (Central Heat)
"CH" stands for "central heat." It is used for space heating demands.
On the Configure Screen, touch the CH thermometer icon to navigate to the CH Selection Screen
There are two identical heat demands, CH1 and CH2, each with independent control algorithms and
independent inputs on the input terminal strip, see SECTION 7
From the CH Selection Screen, touching CH1 navigates to the CH1
8.D.1.a
CH1 (Central Heat, One)
CH1 is one of the heat demands available. The CH1 Configuration Screen allows adjustment of the following parameters:
• Ena ble/Disable - This allows CH1 to be enabled or disabled. The default setting is Enabled.
• Set Point - This is the temperature set point for CH1.
• On Hysteresis - The temperature at which the hysteresis will turn on.
• Off Hysteresis - The temperature at which the hysteresis will turn off.
• PID Low - controls the firing rate whenever the temperature is below the set point. Lower values in P and I will reduce
overshoot.
• PID High - controls the firing rate between the set point and the off Hysteresis. Higher values in P and I will reduce
overshoot.
• Max Power - limit the maximum power, or firing
rate, allowed by this specific heat demand. This
can be used to "de-rate" the boiler to reduce
short cycling.
Set Point
On the Set Point screen, use the keypad on
the right or the up/down arrows to enter the
desired temperature set point for CH1. Press
the "Enter" button to save the setting. Set
Point range is 40-210°F, and default is 180°F.
C O N F I G U R A T I O N
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