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
Y
G
THERMOSTAT
HEAT
RELAY
R
W
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
OT
OT
OUTDOOR
TEMPERATURE
SENSOR
3
RC
L1
(HOT)
L2
M10348
FAN
RELAY
Y
G
THERMOSTAT
RC
HEAT
RELAY
R
W
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
OT
OT
OUTDOOR
TEMPERATURE
SENSOR
4
5
5
M20270
G
O
B
THERMOSTAT
LIMIT
CONTROL
PILOTSTAT
CONTROL
(IF USED)
MILLIVOLTAGE
GAS CONTROL
MILLIVOLTAGE
GENERATOR
Y
R
W
1
AVAILABLE ON SELECT MODELS. OT WIRES MUST HAVE A
SEPARATE CABLE FROM THE THERMOSTAT CABLE.
OT
OT
OUTDOOR
TEMPERATURE
SENSOR
1
PP
TH/
PP
TH
M4826
FOR WRAPAROUND
INSERTION STRIP
7/16 IN. (11 MM).
FOR STRAIGHT INSERTION
STRIP 5/16 IN. (8 MM).
M14628
PRESS LOWER
EDGE OF CASE
TO LATCH.
ENGAGE TABS
AT TOP OF
THERMOSTAT
AND WALLPLATE.
A.
B.
