The Macro "SPA_StatPressControlNordic" is a control module providing duct static pressure filtering and control as an input for the variable fan speed control module. The module has integrated features for plant overrides.
The "SPA_StatPressControlNordic" module provides filtering of the duct static pressure and an analogue output for the variable fan speed control module. The duct static pressure is filtered to provide a smoothed value, which is used to eliminate sudden duct static pressure variations and thus provides a more stable operation of the duct static pressure control. A duct static high limit sensor prevents the ducts against damage, caused by too high pressures.
The module has analogue inputs for a duct static pressure sensor, a duct static high pressure limit sensor, a damper control signal and a digital input for the fan enable signal. It has an analogue output for fan speed command.
The module incorporates plant mode overrides and program initialise from the power failure module.