Vaillant ecoTEC Plus Combi 837, Combi Boiler

A 24 hour analogue central heating timer
The timer plugs directly into the boiler fascia without the need for any wiring. An over-ride switch is also included.
The timeSWITCH 130 works in conjunction with ecoTEC combination models and provides basic 24hr timing for central heating. An additional room thermostat (eg: VRT 50) should be used for temperature control.

A plug-in 7 day or 24 hour digital programmer for ecoTEC boilers. The programmer has 3 independent on/off periods per day, central heating advance function and holiday set-back function. Calendar function for automatic summer/winter changeover.
The timeSWITCH 140 cannot be used with the VRT 50 room thermostat.

Wireless programmable room thermostat. The programmer has 3 independent on/off periods per day, central heating advance function, holiday set-back function, adjustable set-back temperature and 3 room temperature profiles. There is also a calendar function for automatic summer/winter changeover. The thermostat can be set to modulate the boiler maximising fuel savings further.

A digital 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.

Weather compensation can offer fuel saving benefits by taking into account the outside temperature and reducing the boiler heat output accordingly. The VRC 410 has a flexible 7 day or 24 hour time control with independent time control for heating and hot water. When used with ecoTEC combination boilers, the hot water program can be used to provide time control of the 'AquaComfort' system.

Weather compensation can offer fuel saving benefits by taking into account the outside temperature and reducing the boiler heat output accordingly. The VRC 430 has blue backlit, plain text display with numbered screens for clear, easy to read information. Dual 'click and turn' knobs for selecting and changing data. 3 independent time windows per day with set-back temperature. The VRC 430 has a flexible 7 day or 24 hour time control with independent time control for heating and hot water. When used with ecoTEC combination boilers, the hot water program can be used to provide time control of the 'AquaComfort' system.