Jan 17, 2010 I have a working honeywell chronotherm IV plus thermostat but I don't know how to program it. I want 71 at night and 74 during the day. Currently I am 'hold' the temperature twice daily to program it.

T8602D CHRONOTHERM® IV PROGRAMMABLE THERMOSTATS

69-1510-4

6

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• Honeywell Chronotherm IV Plus Honeywell Thermostat, T8624D 1 Answers Honeywell Deluxe Programmable Multistage Thermostat, #T8624D Chronotherm IV Plus I have 2 of above thermostats and have had for about 5 years. It takes no batteries and is directly connected to a 24 volt source. Have one upstairs and one downstairs.

Table 3. Thermostat Installer Setup Options.

Select

Installer Setup

Number (Press

Time

∆ key to

change)

Factory Setting

Other Choices

(Press or key to change)

Actual

Setting

Display

Description

Display

Description

Not Used.

1

—

—

—

—

—

Fan
operation.

2

(Number 2 must
be set to 1 to
extend fan
operation.)

0

Conventional
applications
where
equipment
controls fan
operation in heat
mode.

1

Heat pump or electric heat
applications where
thermostat controls fan
operation in heat mode.

Not Used.

3

—

—

—

—

—

Heating cycle
rate.

4

6

6—6 cph used
for conventional
heat.

1, 3, or
9

1—1 cph used for radiant

floor heat, gravity
system.

3—3 cph used for hot

water systems or high
efficiency furnaces.

9—9 cph used for electric

heat systems.

Not Used.

5 thru 11

—

—

—

—

—

System
setting
adjustment

12

1

Manual

changeover

0 or 2

0—Auto changeover
2—Auto only

Adaptive
Intelligent
Recovery™
control.

13

1

Conventional
recovery
(system starts
recovery at
programmed
time).

Adaptive Intelligent
Recovery™ control is
activated (system starts
early so setpoint is
reached by start of
program period).

—

Not Used.

14 thru 15

—

—

—

—

—

Clock format.

16

0

12-hour clock
format.

1

24-hour clock format.

Not Used.

17 thru 23

—

—

—

—

—

Outdoor
temperature
display
(select
models).

24

0

No outdoor
temperature is
displayed.

1

Outdoor temperature is
displayed. Needs a
C7089B1000 Outdoor
Temperature Sensor to
operate.

Not Used.

25 thru 32

—

—

—

—

—

Minimum off
time for the
compressor.

33

5

5 minute
minimum off time
for the
compressor.

0 thru 4

Minimum number of
minutes (0 thru 5) the
compressor will be off
between calls for the
compressor.

Temperature
range stops
in heating.

34

32.0

Highest setting
for heating
setpoint.

4.5 to
31.5

Temperature range (0.5°C
increments) of heating
setpoint settings.

Temperature
range stops
in cooling.

35

7.0

Lowest setting
for cooling
setpoint.

7.5 to
37.0

Temperature range (0.5°C
increments) of cooling
setpoint settings.

Not Used.

36

—

—

—

—

—

T8602d chronotherm® iv programmable thermostats, Mercury notice, Application

® U.S. Registered Trademark
Copyright © 2003 Honeywell International Inc. •

• All Rights Reserved

INSTALLATION INSTRUCTIONS

69-1510-4

T8602D Chronotherm® IV

Programmable Thermostats

APPLICATION

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

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

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.

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.

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.

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.

2.

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.

Table 1. Description of T8602 Thermostats.

T8602

System

Changeover

System

Selection

Fan

Selection

Comments

Honeywell Chronotherm Iv Instruction Manuals

D

Heat-Cool

Honeywell Chronotherm Iv Plus Manual Pdf

Manual or
Automatic

Honeywell Thermostat Chronotherm Iv Plus User Manual

Selectable

Heat-Off-Cool or

Heat-Off-Cool-Auto

On-Auto

System and fan selections are done
by keyboard.

Honeywell Chronotherm Iv Plus Manual T8611

• Installation
• Wiring
• Settings
• Installer setup
• Checkout