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Calculating damper position.

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Calculating damper position.

Picard Product_Support
‎2018-09-06 10:09 AM

Last Updated: Guinan RobertAndriolo Guinan ‎2022-10-31 06:00 PM

Issue

Can the damper feedback function be calculated using Plain English based on the drive time of the damper?

Product Line

Andover Continuum

Environment

  • Continuum i2866-V Controller
  • Continuum b3866-V Controller

Cause

For this controller application, information about the vav damper position is required.  

Resolution

Only the i2866-v and the b3866-v provide integrated damper feedback. 

 

When using other controller models such as the i2865 or the b3865, an approximation of the damper position can be calculated by adding the damper pulse value to the drive time.  

  • Whenever the damper output is driven to the closed position, a pulse equal to the full damper drive time should be sent to the output and the damper position is reset to 0%.  
  • Whenever the damper output is driven to the fully open position, a pulse equal to the full damper drive time is sent to the output and the damper position is reset to 100%.  
  • Because this method of calculating the position of the damper is only an approximation, it should not be used for critical applications. 
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