The end-of-life air handling units were replaced with a modular fan array, complete with new cooling coils, VFDs, and 60/100 amp bucket breakers and disconnects, each dedicated to its own fan. The key benefit: if one fan fails, the remaining five pick up the load, allowing repairs and maintenance to be performed without shutting down the air conditioning, something the old air handling units could not offer. The new system also runs quieter, even at 100% capacity.
This job required custom-built wood skids to spread the weight of both the new and old equipment as it was moved across the roof, along with the complete removal and reinstallation of the louvres and automated dampers for each phase to move the equipment into the mechanical rooms.