Honeywell T8631A User Manual

Chronotherm III

for Comfort and Convenience

OWNER'S GUIDE

Congratulations! You made a smart choice when you purchased your new Honeywell Communicating Chronotherm III Thermostat. It’s the smart thermostat that:

■

Keeps you comfortable

should go on to have the house at the desired comfort temperature by the time you wake up.

■

Saves the maximum amount of energy and money

or air conditioning when you leave home.

■

Provides the ultimate in comfort and convenience

choice—use the preprogrammed schedule or set your own.

■

Can be connected to a Honeywell's TotalHome system

system devices communicate using HBus, a Honeywell communications protocol.

by automatically calculating exactly when the furnace or air conditioning

by remembering to automatically set back the heat

by coming to you already programmed. But it’s your

for external access and control. TotalHome

Features

Set different schedules for weekdays, Saturday, and Sunday.

Choose manual or programmed thermostat operation.

Program up to four different time periods in each schedule.

Monitor thermostat operation; read current time and room temperature at a glance.

Check status light to see if the thermostat is on, even in the dark.

Set the temperature warmer or cooler with the touch of a key.

Bypass the stored program for a single period.

Choose system and fan operation with the thermostat switches (on subbase).

AUX. HT. and EM. HT. on T8631R. See Glossary, page 40.

Simple Four-Step Programming

Of course, you can use the schedule preprogrammed into your new thermostat. See Glossary, page 40-42). But it’s an easy matter to program the thermostat to fit your lifestyle.

1Set the current time and day. See page 1. 2Set the program schedule and heating

temperatures. See page 2.

3Set the cooling temperatures. See page 7.

4Set the system and fan switches. See page 12.

TABLE OF CONTENTS

Programming Your Thermostat ...........................1-13

Setting the current day and time ............................. 1

Setting the program schedule and heating tempera-

tures....................................................................2

Setting the cooling temperatures ............................ 7

Setting the system and fan switches on the

subbase ............................................................12

Operating Your Thermostat ...............................14-20

Temporarily changing the program ....................... 14

Permanently changing the program ...................... 15

Operating the thermostat manually ....................... 16

Canceling program settings...................................17

Checking the program times and temperatures .... 18

Checking the current temperature setting ............. 19

External access and control of thermostat ............ 20

Maintaining Your Thermostat ............................21-24

Removing the thermostat ...................................... 21

Replacing the thermostat ...................................... 22

Replacing the batteries..........................................23

Power outages ...................................................... 24

Adaptive Intelligent Recovery™ ........................ 25-28

Selecting Recovery Setting................................29-30

Heat Pumps with Supplemental Heat................31-32

Answering Common Questions About the Chrono-

therm III Thermostat............................................33-36

Saving Energy Across the U.S...........................37-39

Glossary...............................................................40-42

Your Personal Program ......................................43-44

Troubleshooting Guide.......................................45-46

Quick Reference to the Keys .............................47-48

Index.....................................................................49-50

Warranty....................................................................51

PROGRAMMING YOUR THERMOSTAT

STEP 1 SETTING THE CURRENT DAY AND TIME

You can program this thermostat only on the wall with 24 Vac applied to R and C terminals.

Always press the keys with your fingertip or similar blunt tool. Sharp instruments like a pen or pencil point can damage the keyboard.

NOTE: Check the glossary, page

40, for definitions of unfamiliar words.

STEP 2 SETTING THE PROGRAM SCHEDULE AND HEATING TEMPERATURES

SET

PRESENT DAY/TIME

DAY

AHEAD

BACK

WAKE

Press and release. The display shows 1:00 PM Mon.

Press and hold until the current day appears in the display.

Press and hold until the current time appears in the display. Be sure AM or PM appears as desired.

You have programmed the current day and time. Go on to Step 2.

Press and release. Note that the display shows WAKE, the preprogrammed time and temperature.

MON

MON TUE WED THU FRI ON HEAT

WAKE

TUE

SET PT

Before You Begin…

The schedule form on page 43 provides an opportunity to plan your schedule.

Now…

Start by programming the WAKE time and temperature for weekdays.

The thermostat requires a program for WAKE. You can program LEAVE, RETURN and SLEEP or not, as you please.

SET

HEAT/COOL

DAY

AHEAD

BACK

If the display reads COOL, press and release to switch to HEAT.

If display reads SAT or SUN, press and hold until MON TUE WED THU FRI appears.

Press and hold until the display shows the desired starting time. If using T8631A in Conventional Recovery ( ■ ■ visible in display). See Glossary section. With Convential Recovery the time should be set 30 or more minutes ahead of desired comfort time to get the house comfortable.

MON TUE WED THU FRI ON HEAT

WAKE

MON TUE WED THU FRI ON HEAT

WAKE

MON TUE WED THU FRI ON HEAT

WAKE

SET PT

PROGRAMMING YOUR THERMOSTAT

Program the LEAVE time and temperature, if desired.

NOTE: You can cancel the LEAVE,

RETURN or SLEEP program by holding down the key until the time and temperature disappear from the display.

Program the RETURN time and temperature, if desired.

WARMER

COOLER

LEAVE

AHEAD

BACK

WARMER

COOLER

RETURN

Press and hold until the display shows the desired temperature.

If the display starts to blink while you are holding down TEMPERATURE WARMER or COOLER, you have reached the setting limit.

Press and release. The display shows LEAVE, but no time or temperature.

Press and hold until the display shows the desired starting time.

Press and hold until the display shows the desired temperature.

Press and release. The display shows RETURN, but no time or temperature.

MON TUE WED THU FRI ON HEAT

WAKE

MON TUE WED THU FRI ON HEAT

LEAVE

MON TUE WED THU FRI ON HEAT

LEAVE

MON TUE WED THU FRI ON HEAT

LEAVE

MON TUE WED THU FRI ON HEAT

RETURN

SET PT

Program the SLEEP time and temperature, if desired.

AHEAD

BACK

WARMER

COOLER

SLEEP

AHEAD

BACK

Press and hold until the display shows the desired starting time. T8631A using Conventional Recovery ( ■ ■ visible in display) should be set 30 or more minutes ahead of desired comfort time.

Press and hold until the display shows the desired temperature.

Press and release. The display shows SLEEP, the preprogrammed time and temperature.

Press and hold until the display shows the desired starting time.

MON TUE WED THU FRI ON HEAT

RETURN

SLEEP

SET PT

PROGRAMMING YOUR THERMOSTAT

Set the SATURDAY schedule. Use the same procedure as for weekdays.

Set the SUNDAY schedule. Use the same procedure as for weekdays.

WARMER

COOLER

DAY

WAKE

SLEEP

AHEAD

BACK

DAY

Press and hold until the display shows the desired temperature.

Press and release until SAT appears on the display.

Press WAKE, LEAVE, RETURN or SLEEP to select the time period.

Press the AHEAD/BACK keys to set the time and the WARMER/COOLER keys to set the temperature.

Press and hold until SUN appears on the display.

MON TUE WED THU FRI ON HEAT

LEAVE

RETURN

WARMER

COOLER

SUN ON HEAT

SLEEP

SAT ON HEAT

SLEEP

SET PT

WAKE

SLEEP

AHEAD

BACK

RUN

PROGRAM

Press WAKE, LEAVE, RETURN or SLEEP to select the time period.

Press the AHEAD/BACK keys to set the time and the WARMER/COOLER keys to set the temperature.

You have completed setting the program schedule and heating temperatures. To set air conditioning, go to Step 3,

If you do not want to program cool temperature, skip Step 3 and press RUN PROGRAM key.

LEAVE

RETURN

WARMER

COOLER

PROGRAMMING YOUR THERMOSTAT

STEP 3 SETTING THE COOLING TEMPERATURES

The program times are the same for both heating and cooling. Only the cooling temperatures need to be programmed if you have already programmed for heating. If you change program times for cooling, you are also changing them for heating! To set times as you program the cooling temperatures, use the TIME AHEAD and BACK keys as described in Step 2.

First program the WAKE temperature for weekdays.

WAKE

SET

HEAT/COOL

DAY

WARMER

COOLER

Press and release. The display shows WAKE, the time and temperature you programmed for heating.

Press and release so COOL shows on the display, along with the programmed cooling temperature.

If display reads SAT or SUN, press and hold until MON TUE WED THU FRI appears.

Press and hold until the display shows the desired temperature.

If the display blinks while you hold down TEMPERATURE WARMER or COOLER, you have reached the setting limit.

SUN ON HEAT WAKE

SUN COOL WAKE

MON TUE WED THU FRI COOL

WAKE

MON TUE WED THU FRI COOL

WAKE

SET PT

Program the LEAVE temperature, if desired.

Program the RETURN temperature, if desired.

LEAVE

WARMER

COOLER

RETURN

Press and release. The display shows LEAVE, the time programmed for heating and 78° F.

Press and hold until the display shows the desired temperature.

Press and release. The display shows RETURN, the time programmed for heating and 78° F.

MON TUE WED THU FRI COOL

LEAVE

MON TUE WED THU FRI COOL

LEAVE

MON TUE WED THU FRI COOL

RETURN

SET PT

PROGRAMMING YOUR THERMOSTAT

Program the SLEEP temperature if desired.

Set the cooling temperatures for the SATURDAY schedule. Use the same procedure as for weekdays.

WARMER

COOLER

SLEEP

WARMER

COOLER

DAY

WAKE

SLEEP

Press and hold until the display shows the desired temperature.

Press and release. The display shows SLEEP, the time programmed for heating and 78° F.

Press and hold until the display shows the desired temperature.

Press and hold until SAT appears on the display.

Press WAKE, LEAVE, RETURN or SLEEP to select the time period.

MON TUE WED THU FRI COOL

LEAVE

RETURN

SLEEP

SAT COOL

SET PT

Set the cooling temperatures for the SUNDAY schedule. Use the same procedure as for weekdays.

WARMER

COOLER

to set the temperature.

Press and hold until SUN appears on

Press the WARMER/COOLER keys

DAY

WAKE LEAVE

SLEEP

the display.

Press WAKE, LEAVE, RETURN or SLEEP to select the time period.

SUN COOL

RETURN

SLEEP

SET PT

PROGRAMMING YOUR THERMOSTAT

Press the WARMER/COOLER keys

WARMER

to set the temperature.

STEP 4 SETTING THE SYSTEM AND FAN SWITCHES ON THE SUBBASE

The T8631A does not have the EM. HT. switch position. Note the positions provided on your subbase, then set the switch(s) as desired.

First set the fan switch.

COOLER

RUN

PROGRAM

You have completed programming the cooling temperatures.

Press and release to start the program.

Go to Step 4.

FAN ON: Use for improved air circulation during special occasions or for more efficient electronic air cleaning. The fan runs continuously.

FAN AUTO: Normal setting for most homes and businesses. T8631A: the fan starts and stops with the air conditioner and with the heating equipment when the fan switch (4A) is set for electric heat. When 4A is set for conventional heat, the fan is controlled by the heating equipment. T8631R: the fan starts and stops with the compressor in heat pump systems when the system switch is set to HEAT or COOL. When system switch is set to EM. HT., the fan operates with the auxiliary heat (on some models).

LEAVE

FAN

SET PT

TUE

AUTOON

AUTO

Then set the system switch.

EM. HT. (T8631R only): The thermostat controls only the backup heat. The heat pump is off.

EM. HT. HEAT OFF COOL

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