Issue
ZBuilder allows for configuration of heating and cooling setpoints as well as PI gain and terminal load deadbands. However, sometimes these parameters can mask the actual activation and deactivation temperature points for heating and cooling outputs.
Product Line
TAC Vista
Environment
- Xenta 121
- ZBuilder
Cause
Figuring out where a Xenta 121 will turn on stages of heating or cooling can be a bit confusing, especially in °F. If you're not careful, you could have the heat operating until the space temp crosses the cooling setpoint at which point, the unit will switch to cooling and turn on the cooling stage(s).
Resolution
- Click here to open a spreadsheet that will calculate the proportional bands and the activation points of the heating and cooling stages.
- Select the tab that describes the cooling/heating application set in ZBuilder
- Enter the temperature setpoints, gain and hysteresis settings and the value of nviSetpoint if it is being used.
- Ensure that cooling/heating bands are not inverted or overlapping to ensure proper operation of the Xenta 121.