I experience a problem controlling space pressure in the building.
As per the sequence of operation space pressurization shall be controlled by maintaining a differential airflow offset between the system exhaust and the system outdoor air.
in the event the system differential airflow exceed the offset setpoint the DDC controller shall modulate the outdoor air damper from open to close and the return air damper from closed to open.
My problem is the pressure is so erratic just why my control is going on and off or modulating from 0 to 100 or vice versa.
any tips and tricks controlling like i have?
I hope you guys could help me.
Thank you in advance.