The present invention relates to a method for controlling a heating and / or cooling
system (1) for a building, comprising a
temperature control element (10) that heats or cools a
temperature control medium, optionally a circulation pump (16), several heat exchangers (5, 5', 5'', 5'') connected to the
temperature control element (10) and optionally to the circulation pump (16), wherein each
heat exchanger (5, 5', 5'', 5'') is assigned to a room of the building and each
heat exchanger (5, 5', 5'', 5'') has a valve (6, 6', 6'', 6'') that regulates the flow of the temperature control medium through the
heat exchanger (5, 5', 5'', 5'') with a valve (6, 6', 6'', 6'''') associated
actuator for varying the opening degree of the corresponding valve (6, 6', 6'', 6''''), a flow
pipe, a flow temperature sensor (3) arranged in the flow
pipe, a
consumer, a return
pipe and a heating circuit temperature sensor (7, 7', 7'', 7'''') arranged in the return pipe, and at least one
control unit (11),the power supply of the actuators of the valves (6, 6', 6'', 6'') is controlled, wherein in the heating and / or cooling
system (1) the temperature control medium is heated or cooled in the temperature control element (10), is led via a supply line (2) to a supply heating circuit
distributor (4), is distributed by the supply heating circuit
distributor (4) to the heat exchangers (5, 5', 5'', 5''), flows through the heating circuits (5, 5', 5'', 5'') and is led via a return heating circuit
distributor (8) into a return line (9) and via the return line (9) to the temperature control element (10), wherein several
setpoint values for the
temperature difference of the temperature control medium in the supply and in the return are set in the respective
actuator Return flow of the respective heat exchanger (5, 5', 5'', 5'') are stored,wherein a change in the
setpoint for the respective
actuator is effected by a clocked sequence of switching the power supply to the corresponding actuator on and off by the
control unit (11). Furthermore, the present invention relates to a
heating system (1) for a building, the
control unit (11) of which is configured to provide the operations for carrying out a method according to the invention, and to a
computer program product, the execution of which in the control unit (11) is configured to provide the operations for carrying out a method according to the invention.