Honeywell RTH6500WF User Manual page 24

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.
69-2718ES—01
Circuit breaker
box
22
or
Heating/cooling
M31544
system power
switch