Quote Originally Posted by chrishvacman View Post
I'm in south Florida and I severely doubt it could happen but how cold would it have to be for how long to freeze a plate heat exchanger, it's a 200 ton chiller so the heat exchanger may hold 20/30 gallons of water. No glycol or brine obviously in Florida. No heaters no water flow.
Chris that's pretty risky not having a working flow switch on your chiller .Draining the evap may not work for you either because plate heatexchangers have a V type passage in them that do not drain .I would suggest Rap the evap with Heat trace wire set up on a outside air thermostat to energize below your safe setpoint and interlocked with the chiller so it is not going to come on if your running the chiller.