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1. Safety Considerations
Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion,
fire, electrical shock, or other conditions which may cause death, personal injury or property
damage. Consult a qualified installer, service agency or your distributor or branch for
information or assistance. The qualified installer or agency must use factory-authorized kits or
accessories when modifying this HVAC system. Refer to the individual instructions packaged
with the kits or accessories when installing.
Follow all safety codes. Wear safety glasses, protective clothing, and work gloves. Have a fire
extinguisher available. Read these instructions thoroughly and follow all warnings and cautions
included in literature and attached to the unit. Consult local building codes and the current
edition of the National Electrical Code (NEC) NFPA 70. In Canada, refer to the current editions
of the Canadian Electrical Code CSA C22.1.
Recognize safety information. When you see this symbol
on the unit and in instructions or
manuals, be alert to the potential for personal injury. Understand the signal words DANGER,
WARNING, and CAUTION. These words are used with the safety-alert symbol. DANGER
identifies the most serious hazards, which will result in severe personal injury or death.
WARNING signifies hazards, which could result in personal injury or death. CAUTION is used
to identify unsafe practices, which may result in minor personal injury or product and property
damage. NOTE is used to highlight suggestions which will result in enhanced installation,
reliability, or operation.
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
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