You shouldn’t use a water sprinkler system in a building with electronic equipment. A Halon Fire suppression system is used more often for that.Just check with a local fire Suppression equipment company.
They’ll lead you in the right direction.
We're probably going to be looking at something for an individual room, rather than making a change for the entire building.
Halon was/is the gold standard for fire suppression in IT areas. I've been retired for long enough to admit that there be something new, however I do know a few things about Halon. It's generally nontoxic and safe to use on electronic equipment. It works by displacing air (20% oxygen) and is heaver than air so it fills the room starting at the floor and fills the space from the bottom up. This allows some time to evacuate ALL the humans in the area to avoid suffocation.
If the space being protected by Halon is on an upper story it is necessary to have outward opening doors that are fitted with automatic door closers lest the Halon pour down the stairwell as fast is it is being dumped into the protected area. It will seek the lowest level because it is heaver than air and may sometimes be found in the basement, days after the fire is extinguished. Fire responders will ventilate the lower floors to remove all remaining traces of the gas. This my have an impact on the tenants in other areas of the building.
Lastly, Halon is not cheap but it does offer the best protection for your situation. You may want to talk with the local Fire Inspectors to find out if Halon is allowed under their codes before making an investment. As I said, Halon may have competition from something newer and less expensive.
Regards,
GtG
PS I believe Halon has displaced CO2 as a fire suppressant because when liquid CO2 is dispersed it drops to something like -72°F and becomes a snow like solid. This is not ideal for fires in enclosed equipment cabinets. It's also likely to create thermal shock in operating equipment.