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THERMOSTAT
Y
G
O
COMPRESSOR
COOL
2
CONTACTOR
DAMPER
FAN
HEAT
RELAY
DAMPER
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
2
CAN BE USED FOR CHANGEOVER VALVE ON SINGLE-STAGE HEAT
PUMP SYSTEMS.
3
AVAILABLE ON SELECT MODELS. OT WIRES MUST HAVE A
SEPARATE CABLE FROM THE THERMOSTAT CABLE.
Fig. 4. Typical hookup in heat and cool
system with one transformers
THERMOSTAT
O
RC
Y
G
2
COMPRESSOR
COOL
CONTACTOR
DAMPER
FAN
RELAY
L1
(HOT)
L2
1
COOLING
TRANSFORMER
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
2
JUMPER RC TERMINAL TO R TERMINAL WHEN INSTALLED ON A
ONE TRANSFORMER SYSTEM.
3
CAN BE USED FOR CHANGEOVER VALVE ON SINGLE-STAGE HEAT
PUMP SYSTEMS.
4
AVAILABLE ON SELECT MODELS. OT WIRES MUST HAVE A
SEPARATE CABLE FROM THE THERMOSTAT CABLE.
5
T8600D MODELS REQUIRE POWER TO R TERMINAL AT ALL TIMES.
Fig. 5. Typical hookup in heat and cool
system with two transformer.
T8600D CHRONOTHERM® IV DELUXE PROGRAMMABLE THERMOSTATS
B
W
R
RC
OT
OT
3
HEAT
RELAY
OUTDOOR
TEMPERATURE
SENSOR
2
1
TRANSFORMER
M10347A
B
W
R
OT
4
5
HEAT
3
RELAY
OUTDOOR
TEMPERATURE
SENSOR
HEAT
DAMPER
3
1
HEATING
TRANSFORMER
FOR WRAPAROUND
INSERTION STRIP
7/16 IN. (11 MM).
Fig. 6. Correct wiring technique.
Mounting Thermostat
1. Engage tabs at the top of the thermostat and wall-
plate. See Fig. 7.
2. Press lower edge of case to close and latch.
L1
(HOT)
L2
NOTE: To remove the thermostat from the wall, first pull
out at the bottom of the thermostat; remove top
last.
A.
OT
B.
Fig. 7. Mounting thermostat on wallplate.
L1
(HOT)
L2
M10348
3
FOR STRAIGHT INSERTION
STRIP 5/16 IN. (8 MM).
ENGAGE TABS
AT TOP OF
THERMOSTAT
AND WALLPLATE.
PRESS LOWER
EDGE OF CASE
TO LATCH.
M4826
M14628
69-1409—1
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