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TRA 410, 421

Electronic room thermostat for heating and heating/cooling with display

Model TRA 410, 421

How energy efficiency is improved

Individual, optimised energy use through precise adherence to setpoints

Features

  • Electronic room thermostat for 24 V or 230 V for heating or heating/cooling with display
  • Easy to read LCD with backlight on TRA 421
  • Silent-switching Triac output (24 V types)
  • Easy to wire up
  • NTC sensor
  • Time programme and pilot clock output integrated in TRA 421
  • Optimised time programme for comfort control and energy saving
  • Input for lowering the room temperature (TRA 410)
  • Input for heating/cooling changeover (TRA 421)
  • Input for external temperature sensor
  • Cooling lock function on versions for heating/cooling
  • Integrated “NC” and “NO” changeover
  • Modern design with ergonomic setpoint adjuster
  • Restriction of temperature setting range
  • Automatic frost protection facility at 5 °C and valve protection facility