Liebert Autochangeover Controllers monitor running and stand-by environmental units for proper operation.
The Liebert RAC2-8 remotely controls from two to eight environmental units. Each unit is assigned to a Zone (room) from 1 to 4. In Zone 1, the largest room, the temperature and humidity can be monitored. The common alarm output from each unit is monitored and annunciated by the RAC2-8. Up to 20 system alarms can be stored with time and date stamp. All alarms are latching and must be manually cleared.
The most important control functions are Autochangeover, Autosequencing, and Standby Testing. Each unit can be assigned a Running or Standby status.