This hotel had an old constant speed DUPLEX system, and both SHp pumps were out of commission. The local. university had graduation in a week, and the hotel could not use the top two floors, which meant considerable revenue loss ($20,000+).
The solution was to remove one of the broken pumps and replace it with a Towle Whitney 2HP pump. In about three hours, the project was completed, and the hotel was up and running. The second pump will be replaced in the future and once installed, both VFDs will be networked together and the system will be turned in to a full functioning duplex, with lead, lag, and alternation capabilities.