surface treatment plant, in particular for cleaning, one or more items having a working space (3; 3';3'';3'''') contains a process medium or a workspace (3; 3');3''''';3'''') is accessible with at least one heater (22; 22');22'') has a process medium that can be heated to a working temperature and the system (1) has a control (50) with a data storage (55) through which at least the heater (22; 22'''';22'') the installation (1) is controllable and/or adjustable by having at least one record in the data storage (55) for at least one process medium, containing at least one initial temperature or temperature range; a final temperature or range of temperatures and a heating period necessary to heat the process medium from the initial temperature to the final temperature are stored;that the control device (50) calculates a start time for the heating process from a specified process start time and a command signal (B1; B1) from the start time stored in the data storage (50) for a certain initial temperature and for a certain end temperature;B1) produces which of the heaters (22) is accessible and an activation of the heater (22; 22';(22) effect.
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