Honeywell Home Smart RTH6580WF1008 User Manual page 15

Installing your thermostat
10 Switch heating/cooling system ON.
Important!
10a Verify that the C wire is
connected at the thermostat
and at the heating/cooling
system.
10b Make sure the heating/cooling
system door is firmly secured.
10c Switch power back ON for
your heating/cooling system
at the breaker box or its power
switch.
Circuit breaker
box
13
or
Heating/
M31544
cooling
system power
switch
69-2715EF—07