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TABLE 2—TYPICAL WIRE COLORS AND FUNCTIONS.
THERMOSTAT CONNECT TO
WIRE COLOR a
TERMINAL
G
Green
Y
Yellow
W
White
Rc
Blue
R
Red
a Wire colors are typical; verify at heating/cooling
equipment connection.
Loosen the terminal screws and slip each
wire beneath its matching terminal. See figure
(lower right) for wire insertion technique.
Tighten terminals securely.
Plug the hole in the wall with insulation to
help prevent drafts from adversely affecting
thermostat operation.
FUNCTION
Fan
Cooling
Heating
Air Cond. Power
Furnace Power
21
PROPER WIRING TECHNIQUE
INSERT
STRAIGHT
5/16 in.
UNDER
[8 mm]
SCREW HEAD
STRIP
END OF WIRE
VISIBLE HERE
INSTALLATION
M3002
JUMPER (FACTORY-
INSTALLED) REMOVE
IF 5-WIRE SYSTEM
M1712A
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