Friday, December 29, 2006

Improvements to HVAC control

Our HVAC system has a couple dumb Aprilaire thermostats, one for the upstairs zone and for downstairs. They have a contact closure input to activate setback mode. The system relies on LM34 sensors in different parts of the house to control when to cycle HVAC. Those setpoints were hardcoded in the TimeCommander+ schedule. I've now made those setpoints variables in the TC+ allowing them to be changed dynamically from an ASP page, script, etc. It makes the system a little bit smarter.

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