With temperature display ACTUAL value Automatic controller calibration With expansion fastening Class of temperature controller: 1 Contribution to space heating energy efficiency: 1.0%. Only in conjunction with commercially available flush-mounted device boxes in accordance with DIN 49073, install or Busch-Jaeger item no. 3040 flush-mounted box for masonry, 3050 flush-mounted box for hollow walls or 3060 flush-mounted box for concrete) Control valves in the version with de-energized closed or open are required for the controller. E.g. item no. 6164/10-102. Switching temperature difference ± 0.5 K.
