• Switchable priority (ON/OFF)
  • Priority zone is field configurable for use with either circulator or zone valve
  • Controls three or four wire 24v zone valves
  • Front window with clearly visible LED diagnostic lights showing zones calling and those satisfied
  • Design compatible with all types of thermostats, and ensures relays energize with power robbing thermostats
  • Auto reset fuse prevents nuisance calls
  • Expandable to 10 zones with Priority utilizing two AZ Controls
  • Clearly marked terminal for easy and accurate installation