Tomorrow morning we will proceed with the springs for the fan / return-air motor of the uta of the clean rooms in CEB, similarly to what has already been done for the supply-air one.
The installation seems to have succesfully reduced the vibration noise associated to the boiler observed by the guralp sensors, at the level of the NE and WE towers floor.
It seems to appreciate a little residual at NEB. Yet, there might be margin for a further improvement, since as Davide observed, some springs appeared overloaded and possibly short-circuited.
