Control System Requirements Clause Samples

Control System Requirements. For an appliance equipped with safety and controlling devices, the functioning of the safety devices must not be overruled by the controlling devices (see the BS EN series of standards for control device requirements). All parts of appliances that are set or adjusted at the stage of manufacture and which should not be manipulated by the user or the installer must be appropriately protected. Levers and other controlling and setting devices must be clearly marked and give appropriate instructions to prevent any error in handling. Their design must preclude accidental manipulation. The surface temperature of knobs and levers of appliances must not present a danger to the user.