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Posted by Bryan on January 08, 2008 at 19:24:59:
I am in the process of installing a Harman VF3000 in a home that has a two zone system which is controlled by zone valves (Honeywell V8043F). Everything works fine with the exception of the high temp. override. The override is controlled by the Johnson Controls S350, Y350, A350 combo. This setup outputs 110 volts which I ran through a transformer to knock it down to 24 vac. Is there a way I can wire this to an existing zone valve and not have it "smoke" the thermostat that controls the corresponding zone valve when the thermostat is calling for heat at the same time as the override is on?
Thanks
Bryan