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Comfort Sync A3 Field Replacement Guide

Comfort Sync A3
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Field Replacement Guide for
Comfort Sync A3 Smart Hub
508045-01, 1/2020
WARNING
Improper installation, adjustment, alteration,
ser vice or maintenance can cause property
damage, personal injury or loss of life.
Installation and service must be performed
by a li censed professional HVAC installer
(or equivalent) or a service agency.
General
This Smart Hub replacement kit is used to
replace any previous version of the Comfort
Sync A3 thermostat smart hub component.
Read this entire document, noting which
procedures pertain to your specic
equipment and system requirements.
Make sure that all wiring conforms to local
and national building and electrical codes
and ordinances.
Do not Install on voltages higher than
30VAC.
Do not exceed 300 feet (91 meters) run
when using 18 or 22 AWG thermostat wire.
Do not allow load from any thermostat
connection to be more than 1 AMP.

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Comfort Sync A3 Specifications

General IconGeneral
TypeSmart Thermostat
Wi-FiYes
Mobile AppYes
DisplayColor touchscreen
Energy Saving FeaturesYes
Programmability7-day programmable
Remote AccessYes
SchedulingYes
Energy MonitoringYes
GeofencingYes
Warranty5-year limited warranty
Voice ControlAmazon Alexa, Google Assistant
Operating ModesHeat, Cool, Auto
CompatibilityMost HVAC systems