DP sensor set point

[sunsatwik]

please can anyone tell me the logic behind fixed dp sensor set point location at different loads?

 

[willard3]

There are many reasons, but a primary one will be to deliver required outside air at reduced loads.

 

[dbill74]

Need more information. Talking air/water system?
In a chilled water system, you want to make sure you have adequate flow/pressure at your most remote coil.
In a VAV system, you want to ensure adequate air is available for your VAV boxes as units closer to the fan open you will starve remotes boxes of air.

 

[RandomUserName]

sunsatwik,

Logic can be explained by reading the 2015 ASHRAE Handbook - HVAC Applications, Chapter 47: Design and Application of Controls. The chapter is 21 pages long and really hits anything you would want to know about DP control on air or water-side devices.

 

[IamMech]

here ashrae handbooks are availableto dowload?

 

[sunsatwik]

thanks a lot for your replies.

 

[willard3]

You must join ASHRAE and pay for handbooks.

 

[cry22]

Time to move away from DP sensor set point.
We are now the world of Static (or head) pressure RESET, see ASHRAE 90.1