Honeywell Chronotherm 3 User Manual

15
To temporarily raise or lower the
temperature for the current period
only.
If you change your mind.WARMER
COOLER
TUE
LEAVEPMSET
PTRUN
PROGRAM
AHEAD
BACK
RUN
PROGRAM
WARMER
COOLER
SLEEP
WAKELEAVE
RETURN
DAY
Press and hold until the desired
temperature is reached. The display
will flash TEMPORARY until the next
programmed time period starts.
Press and release to cancel any of
the temporary settings.
Press and release the desired period
key.
Press and hold until the desired day
schedule shows on the...

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18
OPERATING YOUR THERMOSTAT
CANCELING PROGRAM
SETTINGS
The thermostat requires time and
temperature settings in the WAKE
period, but any of the other periods
can be canceled. Weekday,
Saturday and Sunday settings are
canceled separately.Press and hold the desired period
key until the time and temperature
clear from the display (about 3
seconds).
Press and release to return to
normal operation.SLEEP
LEAVE
RETURN
RUN
PROGRAM
MON TUE WED THU FRI ON HEAT
LEAVE
MON
RETURNPM
CHECKING THE PROGRAM
TIMES AND...

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20
CHECKING THE CURRENT
TEMPERATURE SETTING
Press a single key to compare
current room temperature to the
setting at any time.PRESENT
SETTINGPress and release. The display will
show the current temperature setting
for several seconds, then revert to
the room temperature.
ON HEATSET
PT
ACCSING EXTERNAL SYSTE OPERATING YOUR THERMOSTAT
EXTERNAL ACCESS AND
CONTROL OF THERMOSTAT
The T8631 Communicating
Chronotherm III Thermostat can
be connected to a Honeywell
TotalHome system for external
access and...

22
REMOVING THE THERMOSTAT
1 Loosen the two captive screws at
the bottom corners of the case.2 Pull out the thermostat from the
bottom.3 Lift the thermostat up and off the
base.
AUX. HEAT
HEAT
AUTOCOOLOFFO
N
A
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T
OF
A
N
M5066
SYSTEM
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M
.
 
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T
.H
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A
TO
F
FONAUTOFAN
M5013
C
O
O
LEM. HT.AUX. HEAT
SYSTEMPMRETURN MON
HEAT ONSYSTEM
M5062
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P
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P
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T
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A
Y
/...

23
24
MAINTAINING YOUR THERMOSTAT
REPLACING THE BATTERIES
Your thermostat uses three AAA alkaline batteries. The
display will flash REPL BAT when the batteries get low.
You wonÕt have to reprogram the thermostat if you
insert the new batteries within 20-30 seconds of taking
out the old ones.
To replace:
nSet the system switch to OFF.
nRemove the thermostat from the wall. See page 21.
nLift the batteries out of the holder.
nInsert the new batteries, making sure the positive (+)
terminals all face toward...

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ADAPTIVE INTELLIGENT RECOVERYª
M 168
ADAPTIVE INTELLIGENT
RECOVERYªÑBREAK-
THROUGH TECHNOLOGY
SENSES TEMPERATURE MORE
LIKE YOU DO
Your new thermostat is so smart,
itÕs almost human.n
Your body perceives temperature from a variety of sources, not only from
the air in the room, but also from your surroundingsÑwalls, windows and
furnishings.
n
Human beings feel differences in temperature as slight as two degrees
Fahrenheit.
n
Common household thermometers and standard thermostats sense only
air...

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AM
PMSUN   MON   TUE   WED   THU   FRI   SAT    COOL    ON HEAT    ONWAKE   LEAVE   RETURN   SLEEP     TEMPORARY     UNOCCUIPIED
REPL
BATSET
PT
AM
PMSUN   MON   TUE   WED   THU   FRI   SAT    COOL    ON HEAT    ONWAKE   LEAVE   RETURN   SLEEP     TEMPORARY     UNOCCUIPIED
REPL
BATSET
PT
AM
PMSUN   MON   TUE   WED   THU   FRI   SAT    COOL    ON HEAT    ONWAKE   LEAVE   RETURN   SLEEP     TEMPORARY     UNOCCUIPIED
REPL
BATSET
PT
AM
PMSUN   MON   TUE   WED   THU   FRI   SAT    COOL    ON HEAT...

SELECTING RECOVERY SETTING
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30
Your T8631A Thermostat includes a screw on the back
marked 2A, allowing for the Adaptive Intelligent Recov-
eryª/Conventional Recovery choice.
Your thermostat was shipped from the factory with the
screw positioned for Adaptive Intelligent Recovery
setting. Your installer may have left the screw in this
position, or may have changed it to Conventional
Recovery. Before programming, you must know which
recovery method your thermostat has been set for.
¥ With the Adaptive...

HEAT PUMP WITH SUPPLEMENTAL HEAT
HEAT PUMPS ARE DIFFERENT (T8631R)
nHeat pump systems usually have a supplemental,
second stage heating system that operates only
when necessary
. The Honeywell Chronotherm III
Thermostat for heat pumps is designed to minimize
the more expensive second-stage operation,
indicated by the green AUX light on the switching
subbase.
n
With your Chronotherm III Thermostat, you will
notice that your compressor operates continuously
during the recovery period
. This may appear to...

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ANSWERING COMMON QUESTIONS ABOUT THE CHRONOTHERM III THERMOSTAT
3. Why does the T8631 follow a schedule not
programmed into the thermostat?
When the s 
s is displayed, the thermostat is control-
ling to the setting in your TotalHome system.
4. How many hours in advance of my WAKE time
should the furnace come on?
The time will vary, up to 24 minutes per degree
Fahrenheit difference between the energy saving
and comfort temperatures, depending on outside
temperature and performance during the past...