Round In
Round Out

The Round-in/Round-out VAV unit (VRRF) is a retrofit product designed to simplify upgrading of an existing old-style VariTrane™ units to DDC. It includes an 18-gauge cylinder with flow sensing ring and a control enclosure with the following factory-INSTALLED, WIRED, and TESTED options:

  • Comm4 or Comm5 VAV Controllers
  • Control Power Transformer
  • Toggle Disconnect Switch
  • Control Line Fuse
  • Actuator
  • Pressure Transducer
  • Wireless Receiver
  • Factory download of controller sequence, setpoints, addresses, etc.


For Technical Specifications, please refer to the Catalog or Installation documents on the Literature tab.