Honeywell Chronotherm 3 User Manual

Chronotherm III
for Comfort and Convenience
OWNERS GUIDE
Residential andResidential andHelping You Control Your World
Building Controls DivisionBuilding Controls Division
Honeywell Inc. Honeywell LimitedÑHoneywell LimitŽe
1985 Douglas Drive North740 Ellesmere Road
Golden Valley, Minnesota  55422Scarborough, Ontario
M1P 2V9
Congratulations! You made a smart choice when you purchased your new Honeywell Communicating
Chronotherm III Thermostat. ItÕs the smart thermostat that:
n
Keeps you comfortable by...

Features
Bypass the 

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 ..................................

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.
1
2
SETPRESENT
DAY/TIMEMONPMPress 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...

4 3
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.
PROGRAMMING YOUR THERMOSTAT
AHEAD
BACK
WARMER
COOLER
WARMER
COOLER
MON TUE WED THU FRI ON HEAT
LEAVESET
PTLEAVE
MON TUE WED THU FRI ON HEAT
LEAVE
AMSET
PT
MON TUE WED THU FRI ON HEAT
LEAVE
AMSET
PT
Press and release. The display
shows LEAVE, but no time or
temperature.
Press and hold until the display
shows the...

MON TUE WED THU FRI ON HEAT
SLEEPPMSET
PT
PROGRAMMING YOUR THERMOSTAT
5
WARMER
COOLER
DAY
LEAVE
RETURN
AHEAD
BACK
WARMER
COOLER
SUN ON HEAT
SLEEPPMSET
PTDAY
SLEEP
WAKELEAVE
RETURN
AHEAD
BACK
WARMER
COOLER
RUN
PROGRAM
6
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.
SAT ON HEAT...

7
8
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 tempera-
ture for weekdays.WAKEPress and release. The display...

PROGRAMMING YOUR THERMOSTAT
9
10
WARMER
COOLER
MON TUE WED THU FRI COOL
RETURNPMSET
PTPress and hold until the display
shows the desired temperature.
Program the SLEEP temperature if
desired.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.
SLEEPMON TUE WED THU FRI COOL
SLEEPPMSET
PT
WARMER
COOLER
MON TUE WED THU FRI COOL
SLEEPPMSET
PT
Set the cooling temperatures for
the SATURDAY schedule. Use the
same...

PROGRAMMING YOUR THERMOSTAT
11
12
Press the WARMER/COOLER keys
to set the temperature.
You have completed programming
the cooling temperatures.
Press and release to start the
program.
Go to Step 4.
WARMER
COOLER
RUN
PROGRAM
TUE
LEAVEPMSET
PT
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 sub-
base, then set the switch(s) as
desired.
First set the fan switch.
Then set the system switch.FAN ON: Use for...

13
14
PROGRAMMING YOUR THERMOSTAT
EM. HT.HEAT OFF COOL
EM. HT.HEAT OFF COOL
EM. HT.HEAT OFF COOL
Now, while you enjoy precision
temperature control, read on to
learn about the operating flexibility
that makes this thermostat THE
SMART CHOICE.
OPERATING YOUR THERMOSTAT
TEMPORARILY CHANGING
THE PROGRAM
These features let you tailor the
program for those times when
someone comes home early, or
youÕre staying up late, or you plan
to be out for the evening.
SKIPNEXT
PERIODTUE
LEAVE RETURNPM
TUE
WAKE...