Honeywell Lyric T5 Quick Start Manual page 8

4
Make sure there are no 120/240V
wires.
Do you have thick black wires with
wire nuts? Is your thermostat 120V
or higher? If you answered yes to
either of these questions, you have
a line voltage system and the Lyric
thermostat will not work.
If you are unsure visit:
yourhome.honeywell.com/support
5
Take a picture of how your wiring
looks right now.
Be sure to include the letters next
to the terminals where the wires
are inserted. This will be a helpful
reference when wiring your Lyric
thermostat.
Wire nuts
Thick black wires
8