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Honeywell RTH8500WF Wi-Fi Series Quick Start Manual page 3

Wi-fi touchscreen programmable thermostat
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1
Install your thermostat
1.1 Switch OFF power to your
heating/cooling system
Important!
1.1a
To protect your
equipment, switch OFF the
power to your heating/cooling
system at the breaker box or
the system switch.
1.1b Confirm power is OFF.
Try to turn on heating/
cooling equipment by
changing temperature
on your old thermostat.
Your power is OFF if your
system does not turn ON.
Circuit
breaker
box
This thermostat works with common 24 volt
systems such as forced air, hydronic, heat
pump, oil, gas, and electric.
It will not work with millivolt systems, such as
a gas fireplace, or with 120/240 volt systems
such as baseboard electric heat.
3
or
Heating/cooling
M31535
system power
switch

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