Vaillant 0020018265 VRT 50 Room Thermostat
Easy to install as it only requires a two-wire connection to the boiler. The digital display shows the current room temperature and is for use with ecoTEC plus combination boilers and timeSWITCH 130 central heating timer.
To increase or decrease the room temperature, the home owner simply turns the dial and the display then shows the set temperature. The thermostat can be set to modulate the boiler depending on the actual room temperature thus giving greater efficiency benefits.
The VRT 50 cannot be used with the timeSWITCH 140.