Humidifier Connections; Bypass Humidifier; Fan Powered Humidifiers - Bryant Evolution Connex Control Installation Instructions Manual

• Route wires through large hole in mounting plastic. The hole may be enlarged, if required, to
accommodate existing installations; avoid opening the wire hole more than necessary. Level
backplate against wall (for aesthetic value only; the Evolution Connex Control need not be
level to operate properly) and mark wall through two mounting holes.
• Drill two 3/16-in (4.8 mm) mounting holes in wall where marked.
• Secure mounting plastic to wall using two screws and anchors provided.
• Adjust length and routing of each wire to reach each wire entry on the connector backplate.
Strip 1/4-in (6.4 mm) of insulation from each wire.
• Match and connect thermostat wires to proper terminals on control backplate. See wiring
diagrams in the Wiring Diagrams Section.
• Push any excess wire into the wall. Seal hole in wall to prevent any air leaks. Air leaking
from behind the wall can affect measured temperature and humidity, and can affect
operation.
• Attach Evolution Connex Control to the mounting plastic by lining up the plastic guides on
the back of the control with the opening on the mounting plastic and push on.
• Perform installation of all other system equipment (i.e. dampers, humidifier, ventilator, UV
lights, etc.). See the equipment and device installation instructions for details.
• Turn on power to equipment.

4.6. Humidifier Connections

A 24VAC bypass or fan powered humidifier may be installed.
NOTE: Do NOT use a traditional humidistat to control humidifier operation. If a humidifier is
installed, let the Evolution Connex Control operate humidifier.

4.6.1. Bypass Humidifier

A bypass humidifier should be wired directly to the furnace or fan coil HUM and 24VAC COM
terminals. The Evolution Connex Control will automatically energize the HUM output during a
call for humidification.

4.6.2. Fan Powered Humidifiers

Most fan powered humidifiers produce internal 24VAC in order to energize upon a switch or
contact closure. For this application, a 24VAC N.O. Isolation Relay (DPST) MUST be used to
prevent mixing the internal humidifier power with the indoor equipment transformer. Applying
24VAC isolation relay coil to furnace or fan coil HUM and COM terminals will allow the
Evolution Connex Control to automatically energize the HUM output during a call for
humidification. The N.O. relay contacts will be used to energize the humidifier. See Fan
Powered Humidifier installation instructions for more details.
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