Active Solar Thermal HVAC System Control

Endecon renovated a custom HVAC control system for a home in Hayward, California that had been built with integrated active solar thermal features in 1980.  The original control system was a unique design implemented with wire-wrap prototyping methods that were not aging well after 20 years.  The old sensor and control wiring design was reverse-engineered, re-routed, documented, and a fully documented controller design was installed using a C-programmable PLC (programmable logic controller).  More information is available at here.