Terminal Box Accessory Controller

The ZASF-A is a secondary VAV damper intended specifically for VAV terminal box applications and is designed to be used with the ZN341A and ZN141A. It mounts directly on the secondary VAV damper shaft and provides an integral actuator and a second integrated flow sensor for damper positioning and air-flow sensing in dual duct or tracking systems.


  • BACnet Advanced Application Controllers (B-AAC) that support native BACnet communications to field devices overhigh-speed ARCNET 156 Kbps or BACnet MS/TP networks
  • Separable actuator with a 45 inch-pound (5 Nm) torque rating that can be mounted up to a maximum distance of 300 feet from the controller
  • Precision differential pressure sensor and advanced VAV algorithm increase occupant comfort at both minimum and maximum design air flows, while also extending actuator life
  • Custom-programmable using EIKON® software for the WebCTRL® system, enabling you to create graphic logic sequences for your application
  • Flexible communication port configurations are available for communications to field controllers and routing to other BACnet and non-BACnet devices
  • Supports OptiPoint™ equipment interfaces
  • Supports communicating sensors
  • BACnet Testing Lab (BTL) Product Listing
  • BACnet Protocol Implementation Conformance Statement (PICS)
  • Plenum rated



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