[. . . ] LAMBORGHINI se reserva el derecho de realizar sin preaviso todas las modificaciones que estime oportuno para la evolución del producto The illustrations and data given are indicative and are not binding on the manufacturer. LAMBORGHINI reserves the right to make those changes, considered necessary, for the improvement of the product without forwaming the customer. [. . . ] It is a good rule to have a check of the appliance carried out at least once a year, before the winter season. Such a check should concern, besides the condition of cleanliness of the boiler, the correct functioning of all its control and safety devices as well as the burner itself. The installation of the boiler must only be carried out by Qualified Personnel, following the indications of the Manufacturer and in compliance with all the laws and regulations which control the subject. It is particularly recommended that the regulations in the matter of safety are observed and those that regulate the construction and location of the flue pipes. HYDRAULIC CONNECTION Carry out the hydraulic connection of the appliance complying with the directions placed close to each connection and the ones related in figure 1 of this booklet. The connection must be made so that the pipes are free from tension and it is compulsory to assemble a safety valve on the heating circuit, at a point as near as possible to the boiler, without there being, between said boiler and valve, any obstruction or intercepting device. The appliance is not equipped with the expansion tank; its connection therefore must be carried out by the installer. For such purpose we remind that the system pressure, when cold, must be between 0. CONNECTION TO THE FLUE PIPE It is advised to connect the boiler to a sound flue pipe, built in compliance with the current regulations. The conduit between the boiler and the flue must be made from a material suitable for this purpose or else resistant to temperature and corrosion. [. . . ] Read carefully all warnings and instructions contained in this manual as they give important safety instructions regarding installation, use and maintenance. Installation must be carried out by qualified personnel who will be responsible for respecting existing safety regulations. [. . . ]