Specifications

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Figure 51 - Typical Relay setup for HVAC Control Systems
The LCD touch screen user interface is one of two ways the user can interact
with the system. The LCD touch screen user interface is mounted inside the
building on the wall and is a replacement for a conventional thermostat. The
LCD touch screen communicates with the main microcontroller through an
attached controller board. The controller board reports to the main
microcontroller what has been touched on the screen, and uses information
provided to it from the main microcontroller to update appropriate fields on the
LCD screen.
The web server is another means of manipulating the system. The web server is
designed to be viewed on a mobile device from a remote location. This allows
the user to change the system settings for when the building is not occupied.
The web server communicates with the main control unit so the appropriate fields
are kept current and changes to settings are saved. The web server is set up to
use Wi-Fi technology to connect to the internet for complete remote access to the
system.