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T8602D CHRONOTHERM® IV PROGRAMMABLE THERMOSTATS
3 69-1510-4
Fig. 4. Typical hookup in heat and cool system with
one transformer.
Fig. 5. Typical hookup in millivoltage heating circuit.
Fig. 6. Typical hookup in millvoltage heating and
24 Vac cooling circuit.
Fig. 7. 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.
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
W
MILLIVOLT HEATING-ONLY
WALLPLATE
R
M2931
TH
TH/
PP
PP
MILLIVOLTAGE
GAS CONTROL
LIMIT
CONTRO
L
M
ILLIVOLTAGE
G
ENERATOR
PILOTSTAT
CONTROL
(IF USED)
M2942
TH
TH/
PP
PP
MILLIVOLTAGE
GAS CONTROL
LIMIT
CONTROL
M
ILLIVOLTAGE
G
ENERATOR
PILOTSTAT
CONTROL
(IF USED)
COOLING
CONTACTOR
W
G
R
RC Y O
L1
(HOT)
L2
1
FAN
RELAY
CHANGEOVER
RELAY
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
1
MILLIVOLT HEATING-24Vac
COOLING WALLPLATE
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
.