nest Thermostat E Guide D'installation page 6

3. Take a picture of the wires
Take a picture of your thermostat's wires and
save it for reference. Make sure you can read
the wire terminal labels.
B O G Y W
NOT
USED
IMPORTANT: If there are two labels on
your thermostat's wire connectors, go
to nest.com/ca/labels for detailed help
and instructions.
A AC