Vaillant timeSWITCH 160 Two-Channel Digital Timer - 0020124498 - ecoTEC
Vaillant boiler compatibility: ecoTEC Plus Combination Boilers, ecoTEC Pro Combination Boilers, ecoTEC Exclusive Combination Boilers, ecoTEC Plus System Boilers (VR66 required) and ecoTEC Plus Open Vent Boilers (VR66 required).