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CAUTION
!
Take care when securing and routing wires so
they do not short to adjacent terminals or rear of
thermostat. Personal injury and/or property dam-
age may occur.
Moveable
Yellow Jumper
Figure 3. Typical wiring diagram (see figs. 4, 5, and 6 for typical system/thermostat wiring)
Figure 4. Typical wiring for single transformer heating/cooling system
NOTE: Remove factory-
installed jumper between
RC and RH terminals for
this application.
TRANSFORMER
Hot
120 VAC
Neutral
Figure 5. Typical wiring for two-transformer heating/cooling system
Adjustable Heating
Anticipator
Fan
Switch
OFF
ON
AUTO
System
Switch
G
RC
O
Factory-installed Jumper
KEEP THIS
AREA CLEAR
OF WIRES!
Factory-installed
Red Jumper Wire
Factory-installed
Yellow Jumper Wire
RH
W
B
Heat
* *
Hot
Relay
120 VAC
24 VAC
Neutral
Terminal energized
*
in cooling
TRANSFORMER
KEEP THIS
AREA CLEAR
OF WIRES!
Factory-installed
O
Yellow Jumper Wire
RH
RH
W
B
A
Heat
* *
Relay
24 VAC
Terminal energized
Terminal energized
*
* *
in cooling
in heating
These typical wiring diagrams show only the terminal
identification and wiring hookup. Always refer to wiring
instructions, provided by equipment manufacturer, for
system hookup operation.
Fixed Cooling
Anticipator
Captive
Screws
System
Switch
RH
Y
W
* Terminal "A" is not for field wiring. See
SPECIAL SYSTEM CONFIGURATIONS
section for proper use of terminal "A".
G RC
B
O
THERMOSTAT
W
RH
A
Y
Factory-Installed Jumper
O
Y
G
RC
Compressor
Fan
*
Relay
Relay
Terminal energized
* *
in heating
G RC
B
THERMOSTAT
W
A
Y
O
Y
G
RC
TRANSFORMER
Compressor
Fan
*
Relay
Relay
24 VAC
4
NOTE
THERMOSTAT
SUBBASE
A*
B
SYSTEM
WIRING
A
SYSTEM
WIRING
Hot
SYSTEM
120 VAC
Neutral
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