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KEEP THIS
AREA CLEAR
OF WIRES!
Y
NOTE
Cooling
RED jumper wire (provided
System
with thermostat) must be
connected between thermo-
stat's RH and RC terminals
for proper thermostat oper-
ation with this system.
Figure 6. Cool only, 3-wire,
single transformer systems
KEEP THIS
AREA CLEAR
OF WIRES!
Y
NOTE
Cooling
RED jumper wire (provided
System
with thermostat) must be
connected between thermo-
stat's RH and RC terminals
for proper thermostat oper-
ation with this system.
Figure 7. Heat/cool, 4-wire,
single transformer systems
ATTACHING THERMOSTAT TO SUBBASE
1. Remove cover from thermostat base by gripping the
base in one hand. Use the other hand to pull gently at
the top or bottom of the cover.
2. Carefully remove the shipping protective packing from
the switch.
3. Attach thermostat base to subbase, being sure that all
captive screws are tightened snugly, since they serve
as electrical connections between thermostat and
subbase (see fig. 9).
4. Snap cover on thermostat and set temperature lever to
desired set point.
Field-installed
G
RC
jumper wire
THERMOSTAT
WIRING
RH
Y
W
JUMPER WIRE
G
W
RC
RH
SYSTEM
Fan
Relay
24 VAC
TRANSFORMER
Field-installed
G
RC
jumper wire
THERMOSTAT
WIRING
RH
Y
W
JUMPER WIRE
G
W
RC
RH
SYSTEM
Fan
Heating
Relay
System
24 VAC
TRANSFORMER
KEEP THIS
AREA CLEAR
OF WIRES!
Hot
120 VAC
Neutral
Y
Cooling
Fan
System
Relay
Figure 8. Heat/cool, 5-wire,
two-transformer systems
Hot
120 VAC
Neutral
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.
Cover
Figure 9. Attach Thermostat to Subbase
4
G
RC
RH
Y
W
G
W
RC
RH
Heating
24 VAC
System
HEATING TRANSFORMER
24 VAC
COOLING TRANSFORMER
CAUTION
!
F A
A U
N
T O
Thermostat
THERMOSTAT
WIRING
SYSTEM
Hot
120 VAC
Neutral
Hot
120 VAC
Neutral
O N
S Y
C O
S T
O L
E M
O F
F
H E
A T
Subbase
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