Programmable Control Apparatus for a Heating Installation

摘要

This invention concerns a programmable control apparatus for a heating installation of the type that consists of a clock and a processing unit provided to control one or more heating appliances of the said installation according to programming data. The said programming data are either programming data read in the memory of a card, of the type known as smart cards, when such a card is introduced into a reader of the said apparatus, or programming data resident in the said processing unit when no card is introduced into the said reader. The said resident programming data can be modified only if a card, known as a key card, is introduced into the reader.