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Quick Installation Guide
9
Disconnect the wires and remove the old wall plate.
Use a screwdriver to release wires from terminals. Then, use a wire label to
identify each wire as it's disconnected. The letter on the wire label should
match the letter on the terminal.
Tip: To prevent wires from falling back into the wall, wrap the wires around a
pencil.
Installing your RTH7400/RTH7500 thermostat
RTH7400/RTH7500
Thermostat
10
Bundle and insert wires through the UWP.
Pull open the UWP and insert the bundle of
wires through the back of the UWP.
Make sure at least 1/4-inch (6.3 mm) of
each wire is exposed for easy insertion into
the wire terminals.
UWP
Screws
Mounting
System
4
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Anchors
Wall
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