Edwin hit the nail on the head. I know of several motels that got rid of
their chilled water systems for those very reasons. One was a huge
LaQuinta near the airport here, and as it was either a tilt wall or
cinder block bldg (forgot which it was) it was no small job. Most places
will purchase some extra units as spares, and when one has a problem.
they can swap it out in a couple of minutes, and either take the broken
one to an authorized service center if it is in warranty(some have a 5
yr P&L warranty), or if it is out of warranty, their maint. person can
usually repair them. True, at 100% occupancy, the chilled water system
is somewhat more efficient as far as electrical usage, but that's one of
those things that look good on paper, but in the real world---. Larry