Supply, disassembly of the elements to be replaced, replacement, installation and commissioning of forty fans for the renewal of the ventilation systems in the Belate and Almandoz tunnels.

Supply, disassembly of the elements to be replaced, replacement, installation and commissioning of forty fans for the renewal of the ventilation systems in the Belate and Almandoz tunnels.

The works included in the object of the contract are the following:

- Disassembly of the existing ventilation system in the Belate and Almandoz tunnels: removal of fans, removal of the electrical power cables and disconnection of part of the electrical protection switchgear and control of the electrical panels of the existing transformation centers that they will not be reused,

- installation of the new ventilation system for the Belate and Almandoz tunnels: assembly of the new fans, including tests on existing anchors and new anchors, if necessary,

- reuse of the wiring and protections of one of the pairs to be uninstalled (3.9 and 3.10) for a new location of the fans (4.9 and 4.10),

- functional tests of the new ventilation system.