PROCESS FOR THE CONVERSION OF AN EXISTING HEATING INSTALLATION AND CONTROL UNIT FOR CARRYING OUT THE PROCESS

摘要

The present invention relates to transforming a pre-existing heating installation comprising a main heat generator such as a boiler which is associated with a modulating mixer valve controlled by a P or PD type regulator which is responsive to outside temperature and to the departure temperature of the heating water. In accordance with the invention a control device is inserted between said pre-existing regulator and said pre-existing valve, said control device including an integrator module (110) connected to the output from said pre-existing regulator and controlling a threshold relay (120) which in turn provides successive on/off control of auxiliary heat generators such as heat pumps, when respective thresholds are detected, said control device further including a switch (170, 171, 161) controlled by the threshold relay in the event that heat demand exceeds the supply available from the auxiliary generators in order to allow the signals from the conventional regulator (6, 7) to be applied to the mixing valve in order to enable the main heat generator to be switched on.