The VEC100 controls either VAV or changeover bypass (COBP) units. The VEC100 must reside on the zone bus of a zone coordinator. You can use this single controller to control units with a thermostat interface that are not Smart Equipment units. The VEC100 ships with a configurable application that supports up to two stages of heating and four stages of cooling. Additional applications are available to control modulated heating, modulated cooling, and a heat pump.
You can configure all of the controller applications for use in a VAV or COBP system and to control an economizer. The controller uses analog sensors when you connect them. A supply air temperature sensor must be connected to use the VEC controller. If you connect a return air sensor to the controller and the system is a VAV system, the warm-up feature is integrated for control. If a CO2 sensor is connected and an economizer is installed, demand ventilation control sequences are available.
For more information about the sequences that this controller uses, refer to the application note of the relevant application and the Verasys System Operation Overview Technical Bulletin (LIT-12012370).