Infinity Protocol Main

The information in here is not official documentation from Bryant/Carrier. It was developed merely by making observations on the “ABCD” interface of the HVAC units. Use at your own risk to yourself, your property, and your warranty.

Infinity Protocol Hardware This page talks about the physical protocol.

Infinity Framing Protocol This page talks about the frames passed on the buss and their format.

Infinity - Interpreting Data This page talks about what the data being sent means.

Infinity - Known Devices This page is a list of the devices used on the bus.

Infinity - Operating Observations This page is general observations of particular values