Carrier bryant Evolution Connex Control SYSTXBBECC01-C Installation Instructions Manual page 8

2. Introduction
The Evolution System consists of several intelligent communicating
components which include the Evolution™ Connex™ Control (or User
Interface), variable speed furnace or FE fan coil, 2-stage AC and HP,
(including Geothermal units), multi-stage AC and HP, variable capacity
HP and AC units, and Evolution Connex System Package units which
continually communicate with each other via a four-wire connection
called the ABCD bus. Commands, operating conditions, and other data
are passed continually between components over the ABCD bus. The
result is a new level of comfort, versatility, and simplicity.
All Evolution System furnaces or fan coils are variable-speed and multi
stage for maximum flexibility, efficiency, and comfort. They support
controlled ventilation, humidification, dehumidification, and air quality
control. Either an Evolution System (communicating), or a standard
single-stage 24VAC controlled outdoor unit may be used.
When using conventional single-stage outdoor units, the Evolution
System furnace or fan coil provides the 24 volt signals needed to control
them. When using multi-stage conventional outdoor units or heat pumps,
an Evolution System Network Interface Module or "NIM" (P/N
SYSTXBBNIM01 may be required to provide additional control outputs.
Also, the NIM with a translator board (SYSTXXXTRB01) allows
connection of a Bryant HRV or ERV without the need for separate wall
control.
All system components are controlled through the wall mounted
Evolution Connex Control, which replaces the conventional thermostat
and provides the homeowner with a single wall control for all features of
the system.
3. Quick Start
NOTE: See Installation Section for installation instructions.
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