A commercial customer had an air-conditioning system that had 33 units that connected to 2 outdoor control units. One of the outdoor units was getting old and starting to fail. Unfortunately the way the system had been set up this meant that if one failed, the whole system failed and the client was left without any conditioning.
We suggested 2 possible solutions for them. The first solution was to zone the units and the second was to have all units operating individually. This option meant that if any one if unit failed the rest carried on working.
The client chose the second option which is working really well for them.