Carrier bryant Evolution Connex Control SYSTXBBECC01-C Installation Instructions Manual page 18

• 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
Some 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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