VFD economizer minimum position reset - Verasys - LIT-12012370 - Building automation software - Verasys System

Verasys System Operation Overview Technical Bulletin

Brand
Verasys
Product name
Verasys System
Document type
Technical Bulletin
Document number
LIT-12012370
Revision date
2020-07-01
Product status
Active
Language
English

The variable frequency drive (VFD) economizer minimum position reset strategy (VFD Econ Min Pos Reset) adjusts the economizer minimum position proportional to the supply fan speed to maintain the outdoor ventilation rate. When the supply fan is at 0%, the economizer minimum position is set to Economizer Damper Minimum Position Low Speed Fan. As the supply fan increases to 100%, the economizer minimum position decreases to either the user-specified Economizer Minimum Position Setpoint or the DCV reset-adjusted economizer minimum position.