T8602D CHRONOTHERM® IV PROGRAMMABLE THERMOSTATS

NO

YES

NO

1.5 METERS

(5 FEET)

NO

M10856

WIRES

THROUGH WALL

WALL

ANCHORS (2)

WIRING

Fig. 2. Mounting the wallplate.

All wiring must comply with local electrical codes and ordinances. Refer to Fig. 3 through 6 for typical hookups.

A letter code is located near each terminal for identification.

CAUTION

Electrical Hazard.

WALL

Fig. 1. Typical location of thermostat.

1. Loosen the terminal screws on the wallplate and connect the system wires. See Fig. 7.

IMPORTANT

Use 18 gauge, color-coded thermostat cable for proper wiring.

2. Securely tighten each terminal screw.

3. Push excess wire back into the hole.

4. Plug the hole with nonflammable insulation to prevent drafts from affecting the thermostat.

MOUNTING

HOLES

MOUNTING

SCREWS

M15044

Can cause electrical shock or equipment damage.

Disconnect power before wiring.

THERMOSTAT

G W RC

2

Y R OT

3

OT

COMPRESSOR

CONTACTOR

HEAT

RELAY

FAN

RELAY

OUTDOOR

TEMPERATURE

SENSOR

L1

(HOT)

L2

1

1

COOLING

TRANSFORMER

1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD

PROTECTION AS REQUIRED.

L1

(HOT)

L2

HEATING

TRANSFORMER

2 JUMPER RC TERMINAL TO R TERMINAL WHEN INSTALLED ON A

ONE TRANSFORMER SYSTEM.

3 AVAILABLE ON SELECT MODELS. OT WIRES MUST HAVE A

SEPARATE CABLE FROM THE THERMOSTAT CABLE.

M10855

Fig. 3. Typical hookup in heat and cool system with two transformers.

69-1510-4 2

T8602D CHRONOTHERM® IV PROGRAMMABLE THERMOSTATS

Y G O

THERMOSTAT

B W R RC OT

3

OT

COMPRESSOR

CONTACTOR

COOL

DAMPER

2

HEAT

RELAY

OUTDOOR

TEMPERATURE

SENSOR

FAN

RELAY

HEAT

DAMPER

2

1

1

TRANSFORMER

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD

PROTECTION AS REQUIRED.

L1

(HOT)

L2

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.

M10347A

Fig. 4. Typical hookup in heat and cool system with one transformer.

PILOTSTAT

CONTROL

(IF USED)

MILLIVOLT HEATING-24Vac

COOLING WALLPLATE

W G R RC Y O

TH

TH/

PP

PP

LIMIT

CONTROL

CHANGEOVER

RELAY

MILLIVOLTAGE

GENERATOR

MILLIVOLTAGE

GAS CONTROL

FAN

RELAY

COOLING

CONTACTOR

L1

(HOT)

L2

1

1 POWER SUPPLY. PROVIDE DISCONNECT MEANS

AND OVERLOAD PROTECTION AS REQUIRED.

M2942

Fig. 6. Typical hookup in millvoltage heating and

24 Vac cooling circuit.

FOR WRAPAROUND

INSERTION STRIP

7/16 IN. (11 MM).

FOR STRAIGHT INSERTION

STRIP 5/16 IN. (8 MM).

PILOTSTAT

CONTROL

(IF USED)

MILLIVOLT HEATING-ONLY

WALLPLATE

W R

TH

TH/

PP

LIMIT

CONTROL

PP MILLIVOLTAGE

GAS CONTROL

MILLIVOLTAGE

GENERATOR

M2931

Fig. 5. Typical hookup in millivoltage heating circuit.

M4826

Fig. 7. Correct wiring technique.

Mounting Thermostat

1. Engage tabs at the top of the thermostat and wallplate. 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.

A.

ENGAGE TABS

AT TOP OF

THERMOSTAT

AND WALLPLATE.

3

B.

PRESS LOWER

EDGE OF CASE

TO LATCH.

M14628

Fig. 8. Mounting thermostat on wallplate.

69-1510-4