4.15.4 Vaillant optional plug in timer accessories . . . . 29 140. 110. 115. W. Table 2.1 Technical data ecoTEC combination boiler.For the operator. Operating instructions. timeSWITCH. Dual-channel timer with weekly programme. GB, IE. Operating instructions. 160 Instructions for installation and servicing ecoTEC 839592_12 4.15.4 Vaillant optional plug in timer accessories . . . . 30 timeSWITCH 140 (timer). Operating instructions ecoTEC plus 937 / 0020031573_02 The Vaillant ecoTEC plus 937 provides central heating timeSWITCH 140 (timer). View and Download Vaillant TimeSWITCH 140 operating and installation manual online. Two-channel timer with week programme. timeSWITCH 140 timer pdf manual timeSWITCH 140 Operating and Installation Manual. Operating manual fascia of Vaillant ecoTEC combi heating Vaillant combi boilers, the hot water.