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T8602C CHRONOTHERM
®
IV DELUXE PROGRAMMABLE THERMOSTATS
3 69-1670
Fig. 4. Typical hookup in heat and cool system
with one transformer.
Fig. 5. Typical hookup in heat and cool system
with two transformers.
Fig. 6. T8602 typical millivoltage heating circuit.
.
Fig. 7. Correct wiring technique.
Mounting Thermostat
1. Engage tabs at the top of the thermostat and
wallplate. See Fig. 8.
2. Press lower edge of case to close and latch.
NOTE: To remove the thermostat from the wall, first pull
out at the bottom of the thermostat; remove top
last.
Fig. 8. Mounting thermostat on wallplate.
L1
(HOT
)
L2
M10347A
FAN
RELAY
YG
THERMOSTAT
HEAT
RELAY
RW
COMPRESSOR
CONTACTOR
TRANSFORMER
B
HEAT
DAMPER
COOL
DAMPER
O
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
CAN BE USED FOR CHANGEOVER VALVE ON SINGLE-STAGE HEAT
PUMP SYSTEMS.
AVAILABLE ON SELECT MODELS. OT WIRES MUST HAVE A
SEPARATE CABLE FROM THE THERMOSTAT CABLE.
2
2
2
1
3
OTOT
OUTDOOR
TEMPERATURE
SENSOR
3
RC
L1
(HOT
)
L2
M10348
FAN
RELAY
YG
THERMOSTAT
RC
HEAT
RELAY
RW
L1
(HOT)
L2
COMPRESSOR
CONTACTOR
HEATING
TRANSFORMER
COOLING
TRANSFORMER
B
HEAT
DAMPER
COOL
DAMPER
O
2
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
JUMPER RC TERMINAL TO R TERMINAL WHEN INSTALLED ON A
ONE TRANSFORMER SYSTEM.
CAN BE USED FOR CHANGEOVER VALVE ON SINGLE-STAGE HEAT
PUMP SYSTEMS.
AVAILABLE ON SELECT MODELS. OT WIRES MUST HAVE A
SEPARATE CABLE FROM THE THERMOSTAT CABLE.
T8600D MODELS REQUIRE POWER TO R TERMINAL AT ALL TIMES.
2
3
3
1
1
3
4
OTOT
OUTDOOR
TEMPERATURE
SENSOR
4
5
5
M20270
GOB
THERMOSTAT
LIMIT
CONTROL
PILOTSTAT
CONTROL
(IF USED)
MILLIVOLTAGE
GAS CONTROL
MILLIVOLTAGE
GENERATOR
YRW
1
AVAILABLE ON SELECT MODELS. OT WIRES MUST HAVE A
SEPARATE CABLE FROM THE THERMOSTAT CABLE.
OTOT
OUTDOOR
TEMPERATURE
SENSOR
1
PP
TH/
PP
TH
M482
6
F
OR WRAPAROUND
I
NSERTION STRIP
7
/16 IN. (11 MM).
FOR STRAIGHT INSERTION
STRIP 5/16 IN. (8 MM).
M1462
8
PRESS LOWER
EDGE OF CASE
TO LATCH.
ENGAGE TABS
AT TOP OF
THERMOSTAT
AND WALLPLATE.
A.
B
.