How do you reset the Viconics VT7200, VT7300, & VT7600 LON series thermostats back to factory default values?
Viconics VT7200, VT7300, VT7600
There's no button or command that sets the thermostat to its default parameter settings.
Either set them manually or through the snvts available via a LON integration. The Viconics Lon Integration Manual will help with identifying the proper snvts to use.