I have a Controller 67 and an 8" fan to heat/cool my bonus room. The fan works great but the Controller 67 is not designed for "human comfort control". In the heating season, I have the temperature sensor in the duct work and the controller is set to "Auto" with a "Temperature trigger" set to 80 deg F. When the air gets above 80 the fan ramps up and turns off when the temperature in the duct work falls below 80. - I have tried another option by putting the temperature sensor in the space and using the Controller 67 as a normal HVAC thermostat. That works accept the fan runs anytime the room space temperature is below the setpoint on the Controller 67. I want the fan to turn off anytime my HVAC unit isn't running. Question: Is there any way to add an air flow switch (AFS-222) or similar device to turn off the fan if my HVAC unit isn't running? (Note: One way that I could accomplish this is to kill the power to the Controller 67, but that is not acceptable.) I tried lifting the yellow wire at the fan terminal strip but the fan signal goes to 10v dc sending the fan to 100% (10). Any suggestions are welcome. Thanks.
You sure you're on the right forum? Seems like this would be a good question for some HVAC community.
Sorry but if you read and understood my question you would understand that if not an HVAC question. It is a question that requires detailed knowledge of the Controller 67. (AC Infinity won't give me a wiring diagram of the Controller 67, then I could figure it out myself.)
This is a forum for users of Hubitat Elevation, a home automation hub. Many people use it to control their HVAC systems and there are a lot of DIYers here, but Iām not sure how likely you are to find someone with a detailed knowledge of this device.
I had never heard of this, so I went to their site. Unless I am missing something, that controller doesn't integrate with anything external, or have an open API to allow integration. I also saw references in a couple places about not hooking the fans to an external power source.
It appears to be a closed, proprietary system, that does not allow for any external control. I am not sure there is an easy method (or a method at all) to integrate this with Hubitat.
Most people would have simply used a regular duct booster fan in your situation and not added the complexity of this Controller 67 device.
That's the approach I took many years ago to balance airflow between the upstairs and downstairs of my house. And control the duct booster fan using RIB relay along with a current sensor switch that senses current in the main HVAC blower.
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