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- Thu Dec 29, 2011 12:27 pm
- Forum: Help and Advice
- Topic: Thermostat Options for EWC-ST Series Control Panels
- Replies: 84
- Views: 272897
Re: Thermostat Options for EWC-ST Series Control Panels
Along the same line... I have an EWC-ST-2C with two damper valves, heating and A/C. I am looking to wire an RTH6400 series Honeywell Thermostat. The new stat has G, W (O/B), Y, R, and Rc terminals. Can I wire O and B together. No heat pump, just boiler and A/C with air handler.