The is simultaneously simpler and more complex than traditional diagrams. It is simpler because you only need four wires (A, B, C, D) regardless of how many stages your equipment has. It is more complex because those four wires carry digital data, not simple on/off signals.
The basic ABCD wiring stays the same, but where those wires go changes depending on your equipment. Below are the most common scenarios. Carrier Infinity Thermostat Wiring Diagram
This comprehensive guide will break down the wiring architecture of the Carrier Infinity system, explain the differences between the communicating and standard setups, and provide the diagrams you need to get your system running. The is simultaneously simpler and more complex than
: If you are trying to use a non-communicating thermostat (like Nest or Honeywell) on an Infinity unit, you must bypass the ABCD terminals and use the unit's conventional terminals (R, C, W, Y, G), which may require 6 to 8 wires. Remote Sensors : Terminals The basic ABCD wiring stays the same, but
Because of this, the wiring diagram is fundamentally different. The Infinity Thermostat (such as the Touch-N-Go series) is designed to talk to an Infinity Furnace and an Infinity Air Conditioner or Heat Pump.
If you have a full Infinity system (Infinity Furnace, Infinity Outdoor Unit, and Infinity Control), your wiring diagram is surprisingly clean. The thermostat connects to the furnace control board using a proprietary 4-wire communication bus.