vaillant colormatic Glühzünder This classification serves only as

This classification serves only as a preliminary guide and does not replace a professional heat load calculation or system planning

Service key

A special feature of the LK 950 actuator is the ability to switch to manual operation in the event of a control system malfunction

The return temperature must be kept sufficiently high to protect the boiler body from harmful condensation and corrosion

vaillant colormatic Glühzünder This classification serves only asVaillant colorMatic VRT 350 digital room temperature controller Brief description The Vaillant colorMatic VRT 350 is a digital room temperature controller with a plain text display that combines comfort and energy efficiency in living spaces. Its illuminated plain text display and intuitive operation allow for quick use without prior knowledge. Special features The controller features an easy to read, backlit display and shows all settings in plain