Honeywell T8602D User Manual

APPLICATION

T8602D Chronotherm® IV

Programmable Thermostats

INSTALLATION INSTRUCTIONS

The T8602 Chronotherm® IV Programmable Thermostat provides electronic control of 24 Vac single-stage heating and cooling systems or 750 mV heating and 750 mV

Table 1. Description of T8602 Thermostats.

T8602 System Changeover

D Heat-Cool Manual or

MERCURY NOTICE

If this control is replacing a control that contains mercury in a sealed tube, do not place your old control in the trash. Dispose of properly.

Contact your local waste management authority for instructions regarding recycling and the proper disposal of the old control.

Automatic

Selectable

System

Selection

Heat-Off-Cool or

Heat-Off-Cool-Auto

INSTALLATION

When Installing this Product...

1. Read these instructions carefully. Failure to follow the instructions can damage the product or cause a hazardous condition.

2. Check the ratings given in the instructions and on the product to make sure the product is suitable for your application.

3. Installer must be a trained, experienced service technician.

4. After completing installation, use these instructions to check out the product operation.

Location

Install the thermostat about 1.5m (5 ft) above the floor in an area with good air circulation at average temperature. See Fig. 1.

cooling. Refer to Table 1 for a general description of the thermostat. All T8602 Thermostats are powered by batteries.

Fan

Selection Comments

On-Auto System and fan selections are done

Do not install the thermostat where it can be affected by: — drafts, or dead spots behind doors and in corners. — hot or cold air from ducts. — radiant heat from sun or appliances. — concealed pipes and chimneys. — unheated (uncooled) areas such as an outside wall

behind the thermostat.

by keyboard.

Wallplate Installation

The thermostat can be mounted horizontally on the wall or on a 50.8 mm x 101.6 mm (2 in. x 4 in.) wiring box. Position wallplate horizontally on the wall or on a

50.8 mm x 101.6 mm (2 in. x 4 in.) wiring box.

1. Position and level the wallplate (for appearance only). The thermostat will function properly even when not level.

2. Use a pencil to mark the mounting holes. See Fig.

3. Remove the wallplate from the wall and drill two

4.76 mm (3/16 in.) holes in the wall (if drywall) as marked. For firmer material such as plaster, drill two 5.56 mm (7/32 in.) holes. Gently tap anchors (provided) into the drilled holes until flush with the wall.

4. Position the wallplate over the holes, pulling wires through the wiring opening.

5. Loosely insert the mounting screws into the holes.

6. Tighten mounting screws.

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T8602D CHRONOTHERM® IV PROGRAMMABLE THERMOSTATS

)

L (

Fig. 1. Typical location of thermostat.

WALL

WALL ANCHORS (2)

WIRES THROUGH WALL

Fig. 2. Mounting the wallplate.

WIRING

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. Can cause electrical shock or equipment damage.

Disconnect power before wiring.

MOUNTING HOLES

MOUNTING SCREWS

M15044

YES

1.5 METERS (5 FEET)

1. Loosen the terminal screws on the wallplate and

IMPORTANT

2. Securely tighten each terminal screw.

3. Push excess wire back into the hole.

4. Plug the hole with nonflammable insulation to pre-

HOT)

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

JUMPER RC TERMINAL TO R TERMINAL WHEN INSTALLED ON A

ONE TRANSFORMER SYSTEM.

AVAILABLE ON SELECT MODELS. OT WIRES MUST HAVE A SEPARATE CABLE FROM THE THERMOSTAT CABLE.

M10856

connect the system wires. See Fig. 7.

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

vent drafts from affecting the thermostat.

THERMOSTAT

COMPRESSOR CONTACTOR

FAN RELAY

COOLING TRANSFORMER

Fig. 3. Typical hookup in heat and cool

system with two transformers.

HEAT RELAY

HEATING TRANSFORMER

OUTDOOR TEMPERATURE SENSOR

OTOT

L1 (HOT

M10855

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T8602D CHRONOTHERM® IV PROGRAMMABLE THERMOSTATS

)

M10347A

M G

F I 7

THERMOSTAT

COMPRESSOR CONTACTOR

COOL DAMPER

FAN RELAY

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.

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

PILOTSTAT CONTROL (IF USED)

ILLIVOLTAGE ENERATOR

HEAT

RELAY

HEAT DAMPER

one transformer.

TH/

MILLIVOLTAGE GAS CONTROL

MILLIVOLT HEATING-ONLY WALLPLATE

OUTDOOR TEMPERATURE SENSOR

TRANSFORMER

LIMIT CONTRO

M2931

OTOT

L1 (HOT

Fig. 5. Typical hookup in millivoltage heating circuit.

MILLIVOLT HEATING-24Vac

PILOTSTAT CONTROL (IF USED)

TH/

ILLIVOLTAGE ENERATOR

L1 (HOT)

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

Fig. 6. Typical hookup in millvoltage heating and

OR WRAPAROUND

NSERTION STRIP

/16 IN. (11 MM).

MILLIVOLTAGE GAS CONTROL

24 Vac cooling circuit.

COOLING WALLPLATE

LIMIT CONTROL

FAN RELAY

FOR STRAIGHT INSERTION STRIP 5/16 IN. (8 MM).

RC Y O

CHANGEOVER RELAY

COOLING CONTACTOR

M2942

M482

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.

ENGAGE TABS AT TOP OF THERMOSTAT AND WALLPLATE.

PRESS LOWER EDGE OF CASE TO LATCH.

M1462

Fig. 8. Mounting thermostat on wallplate.

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T8602D CHRONOTHERM® IV PROGRAMMABLE THERMOSTATS

I O T A

Using Thermostat Keys

The thermostat keys are used to:

• set current day and time,

• program times and setpoints for heating and cooling,

• temporarily override program temperatures,

• display present setting,

• configure Installer Setup,

NCREASE TIME SETTING

R SCROLL FORWARD HROUGH INSTALLER SETUP ND SYSTEM TEST

SET CURRENT DAY AND TIME

RETURN TO NORMAL OPERATIONS

ENTER INDEFINITE OR TIMED HOLD MODE

SET CURRENT OR PROGRAM DAY

CHANGE BETWEEN DAYLIGHT SAVINGS AND STANDARD TIME

SET WAKE TIMES AND SETPOINTS

Set Current

Run

Day/Time

Program

Hold Temp

Day

Daylight

Time

COPY ONE PROGRAMMED DAY TO ANOTHER DAY

Fig. 9. T8602D key locations and descriptions.

SETTINGS

System and Fan Settings

The System default setting is Heat and the Fan default setting is Auto. Use the System and Fan keys to change the settings. See Fig. 10. The fan settings can be set for each program period individually. The system selection is for all the program periods.

System settings control the thermostat operation as follows:

Heat: The thermostat controls the heating. Off: Both the heating and cooling are off. Cool: The thermostat controls the cooling. Auto: The thermostat automatically changes between heating and cooling operation, depending on the indoor temperature.

Fan settings control the system fan as follows:

On: Fan operates continuously. Auto: Fan operates with equipment.

• check Self-Test,

• display outdoor temperature (select models),

• set the system operation,

• set the fan operation.

See Fig. 9 for the location of the keys.

SET LEAVE TIMES AND SETPOINTS

Time Set Program

Wake

Heat/Cool

Settings

Copy

DECREASE TIME SETTING OR SCROLL BACKWARD THROUGH INSTALLER SETUP AND SYSTEM TEST

SET RETURN TIMES AND SETPOINTS

Leave

Run

Program

Hold Temp

Fig. 10. Thermostat System and Fan key locations.

NOTE: Always press the keys with your fingertip or sim-

INCREASE TEMPERATURE SETTING OR SCROLL FORWARD THROUGH INSTALLER SETUP OPTIONS

DECREASE TEMPERATURE SETTING OR SCROLL BACKWARD THROUGH INSTALLER SETUP OPTION

DISPLAY INFORMATION SUCH AS PRESENT SETTINGS AND OUTDOOR TEMPERATURE

Leave

Wake

SET SLEEP TIMES AND SETPOINTS

SELECT FAN OPERATION

SELECT SYSTEM OPERATION

CHANGE BETWEEN HEATING AND COOLING SETPOINTS

Sleep

Return

System Fan

M14625

M14624

System

Fan

Return Sleep

System Fan

Time Set Program

Set Current Day/Time

Heat/Cool

Day

Settings

Daylight

Copy

Time

ilar blunt tool. Sharp instruments like a pen or pencil point can damage the keyboard.

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