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5
Take a picture of how your wiring
looks right now.
Be sure to include the letters
next to the terminals where the
wires are inserted. This will be a
helpful reference when wiring your
thermostat.
Tip: If the color of your wires has
faded or if 2 terminals have the
same wire color, use the wire labels
provided in the package to label
each wire.
6
Remove any jumpers.
A jumper connects one terminal to
another terminal. It may look like
a small staple or even a colored
wire and must be removed before
continuing. Use a screwdriver to
release wires from terminals.
The RTH7400/RTH7500
thermostat does not need jumpers.
7
Record if you have wires in the following terminals.
Do not include jumpers as a part of your count. The thermostat does not
need jumpers.
Terminal
Wire Color
R
R
h
Rc
8
Write down the color of the wires.
Check mark the wires that are connected to terminals. Next to the check mark,
write down the color of the wire. Do not include jumpers as a part of your
count.
Check all that apply (Not all will apply):
Terminal
Wire Color
Y
Y2
G
C
The RTH7400/RTH7500 thermostat does not support L/A, S, or U terminals.
If there are wires in terminals that are not listed, you will need additional
wiring support. Visit resideo.com to find out if the thermostat will work for you.
RTH7400/RTH7500 Series
Example of
a jumper
Terminal
Wire Color
A or L/A
O/B
W2 or AUX
E
W
K
3
Y R RC
Terminals
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