Honeywell Programmable Thermostat User manual

OWNER'S
MANUAL
How to operate your new Programmable Thermostat

Congratulations! You made a smart choice when you purchased your new programmable thermostat.
It’s the smart thermostat that:
■
Keeps you comfortable by automatically calculating exactly when the furnace or air conditioning
should go on to have the house at the desired comfort temperature at the time you want.
■
Saves the maximum amount of energy and money by remembering to automatically set back the
heat or air conditioning when you leave home or sleep.
■
Provides the ultimate in comfort and convenience . It comes already programmed, so it’s your
choice—use the pre-programmed schedule or set your own.

TABLE OF CONTENTS
i
Programmed Recovery......................................... 1-4
Recovery Setting................................................... 5-6
Programming Your Thermostat ......................... 7-22
Set the current day and time ..................................7
Set the program schedule and
heating temperatures........................................8
Set the cooling temperatures,
if you have air conditioning ..............................15
Set the system and fan switches,
if your thermostat has them .............................21
Operating Your Thermostat ............................. 23-29
Temporarily changing the program ......................23
Permanently changing the program .....................25
Operating the thermostat manually ......................26
Canceling program settings..................................27
Checking the program times
and temperatures ............................................28
Checking the current
temperature setting..........................................29
Maintaining Your Thermostat .......................... 31-34
Removing the thermostat .....................................31
Replacing the thermostat .....................................32
Replacing the batteries.........................................33
Power outages .....................................................34
Glossary............................................................. 35-37
Your Personal Program .................................... 39-40
Troubleshooting Guide..................................... 41-42
Typical Questions ............................................. 43-46
Typical Energy Savings..........................................47
Quick Reference to the Keys ........................... 49-50
Index................................................................... 51-52

1
PROGRAMMED RECOVERY
M168
PROGRAMMED RECOVERY—
BREAKTHROUGH TECHNOLOGY
SENSES TEMPERATURE
MORE LIKE YOU DO

2
Your new thermostat is so smart,
it’s almost human. ■
Your body perceives temperature from a variety of sources, not only
from the air in the room, but also from your surroundings—walls,
windows and furnishings.
■
Human beings feel differences in temperature as slight as one
degree Celsius.
■
Common household thermometers and standard thermostats sense
only air temperature, which may or may not reflect how hot or cold
the room actually
feels to a human being.
■
Your new thermostat reads the temperature of the wall as well as the
air—and responds to temperature changes as little as one-half
degree Celsius—so room temperature is more likely to “feel right”to
you and your family.
PROGRAMMED RECOVERY

PROGRAMMED RECOVERY
■
This thermostat is actually a small but powerful computer . When
calculating the exact time to turn on your furnace or air conditioner,
it considers (1) air temperature, (2) the temperature of the wall and
(3) when you want the comfort temperature established.
3
AM
PM
SUN MON TUE WED THU FRI SAT COOL ON HEAT ON
WAKE LEAVE RETURN SLEEP TEMPORARY UNOCCUIPIED
REPL
BAT
SET
PT
System Operating
in Energy Saving Mode
Recovery Begins Recovery Continues
System Operating
in Comfort Mode
ENERGY
SAVINGS
PERIOD RECOVERY FROM ENERGY SAVINGS COMFORT
PERIOD
TIME
TEMPERATURE
THE THERMOSTAT USES THE SAME SCHEME TO RETURN GRADUALLY
TO LOWER COMFORT TEMPERATURE DURING THE COOLING SEASON.
M467A
AM
PM
SUN MON TUE WED THU FRI SAT COOL ON HEAT ON
WAKE LEAVE RETURN SLEEP TEMPORARY UNOCCUIPIED
REPL
BAT
SET
PT
AM
PM
SUN MON TUE WED THU FRI SAT COOL ON HEAT ON
WAKE LEAVE RETURN SLEEP TEMPORARY UNOCCUIPIED
REPL
BAT
SET
PT
AM
PM
SUN MON TUE WED THU FRI SAT COOL ON HEAT ON
WAKE LEAVE RETURN SLEEP TEMPORARY UNOCCUIPIED
REPL
BAT
SET
PT
THE OPTIMUM COMFORT AND
ENERGY SAVINGS SOLUTION

■
During Programmed Recovery the thermostat increases the control
temperature gradually and turns the equipment on and off
several
times to save energy by avoiding “overshooting”the comfort
temperature. You can see the current control temperature anytime
during recovery by pressing the PRESENT SETTING key. On some
models, both the SYSTEM and ENRG SAV lights may be lit at the
same time during recovery.
■
This “smart”control learns from experience . Each day it checks how
closely it “hit the target”and adjusts the recovery start time accord-
ingly.
It typically takes four to eight days after installation for this
thermostat to adjust to the weather, your life style, home
construction and heating/cooling system. The thermostat calculates
the LEAVE/RETURN recovery separately from the SLEEP/WAKE
recovery.
■
With this thermostat you can choose whether you want to use
Programmed Recovery or conventional recovery. Use Programmed
Recovery if you want to choose the exact time that the room
reaches your
comfort temperature. Use conventional recovery if you
prefer to choose the exact time your furnace or air conditioner
comes on to start recovery.
4

5
RECOVERY SETTING
Your thermostat includes a screw on the back marked “3A”, allowing
for the Programmed Recovery/conventional recovery choice.
Your thermostat was shipped from the factory with the screw posi-
tioned for Programmed Recovery. Your installer may have left the
screw in this position, or may have changed it to conventional
recovery. Before programming, you must know for which recovery
method your thermostat has been set.
•With Programmed Recovery, the dwelling will reach the comfort
temperature at the exact time you have programmed into the
thermostat. See pages 1-4 for detailed explanation of Programmed
Recovery.
•With conventional recovery, the programmed time will mark the start
of recovery; therefore, you should program the start time to be
earlier than the desired comfort time. It may require some trial and
error to arrive at the best starting time, and the best starting time will
vary as the seasons change.
RECOVERY
SELECTION
ADAPTIVE
INTELLIGENT
CONVENTIONAL
3A
IN
(FACTORY SETTING)
OUT 1/2 TO 1 TURN
3A
M2120C
TM

6
To determine which type of recovery is set into your thermostat, make
sure thermostat is powered with fresh batteries, or is mounted and
powered on the wall (see page 32).
Press key. Check thermostat display.
•If the ■shows in the lower right-hand corner (see illustration), the
thermostat is set for conventional recovery. If you would rather have
Programmed Recovery, remove thermostat from wallplate, turn
screw 3A (on back of thermostat) clockwise until it bottoms. DO
NOT OVERTIGHTEN.
•If the ■does not show, the thermostat is set for Programmed
Recovery. If you would rather have conventional recovery, remove
thermostat from wallplate, turn screw 3A (on back of thermostat)
out 1/2 to 1 turn.
RUN
PROGRAM
RECOVERY SETTING
MON
WAKE
AM
INDICATES
THERMOSTAT IS SET
FOR CONVENTIONAL
RECOVERY

7
PROGRAMMINGYOUR THERMOSTAT
STEP 1
SET THE CURRENT DAY AND TIME
You can program this thermostat either
on the wall or in your hand. SEE
PAGE 31 TO FIND OUT HOW TO
REMOVE THE THERMOSTAT FROM
THE WALL.
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 35,
for definitions of unfamiliar words.
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.
SET
PRESENT
DAY/TIME
AHEAD
BACK
DAY
MON
PM
TUE
PM
TUE
PM

8
IMPORTANT
Before you begin STEP 2, determine if your thermostat is set for Programmed Recovery or conventional recov-
ery. See pages 5-6.
If set for Programmed Recovery, program the times for when you want your home comfortable. The thermostat
will decide how early to begin the temperature changes.
If set for conventional recovery, program the times earlier, allowing your home to reach the comfort temperature
by the time you get home or wake up. Some trial and error may be required to arrive at the best starting times.
The schedule form on page 39 provides an opportunity to plan your schedule.
STEP 2
SET THE PROGRAM
SCHEDULE AND HEATING
TEMPERATURES
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.
Press and release. Note that the
display shows WAKE and the
preprogrammed time and
temperature.
If you have air conditioning and
the display reads COOL, press
and release to switch to HEAT.
WAKE
SET
HEAT/COOL
PROGRAMMING YOUR
MON TUE WED THU FRI HEAT
WAKE
AM
SET
PT
MON TUE WED THU FRI HEAT
WAKE
AM
SET
PT

PROGRAMMINGYOUR THERMOSTAT
9
DAY
NOTE: The display shows
Programmed Recovery setting in
the following instructions.
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.
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. If your thermostat
can switch automatically between
heating and cooling, the heating
temperature must be at least 2
AHEAD
BACK
WARMER
COOLER
MON TUE WED THU FRI HEAT
WAKE
AM
SET
PT
MON TUE WED THU FRI HEAT
WAKE
AM
SET
PT
MON TUE WED THU FRI HEAT
WAKE
AM
SET
PT

10
degrees below the air
conditioning temperature. For
example, if the cooling setting is
24°C, the maximum heating
setting is 22°C.
Program the LEAVE time and
temperature, if desired.
NOTE: You can cancel the
LEAVE, RETURN or SLEEP
program by holding down the
period key until the time and
temperature disappear from the
display.
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.
LEAVE
AHEAD
BACK
WARMER
COOLER
MON TUE WED THU FRI HEAT
LEAVE
SET
PT
MON TUE WED THU FRI HEAT
LEAVE
AM
SET
PT
MON TUE WED THU FRI HEAT
LEAVE
AM
SET
PT

11
PROGRAMMINGYOUR THERMOSTAT
Program the RETURN time and
temperature, if desired. Press and release. The display shows RETURN, 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.
RETURN
AHEAD
BACK
WARMER
COOLER
MON TUE WED THU FRI HEAT
RETURN
SET
PT
MON TUE WED THU FRI HEAT
RETURN
PM
SET
PT
MON TUE WED THU FRI HEAT
RETURN
PM
SET
PT

12
Program the SLEEP time and
temperature, if desired. Press and release. The display shows SLEEP and the prepro-
grammed time and temperature.
Press and hold until the display
shows the desired starting time.
Press and hold until the display
shows the desired temperature.
SLEEP
AHEAD
BACK
WARMER
COOLER
MON TUE WED THU FRI HEAT
SLEEP
PM
SET
PT
MON TUE WED THU FRI HEAT
SLEEP
PM
SET
PT
MON TUE WED THU FRI HEAT
SLEEP
PM
SET
PT

PROGRAMMINGYOUR THERMOSTAT
Set the SATURDAY schedule.
Use the same procedure as for
weekdays.
Press and hold until SAT appears
on the display.
Press WAKE, LEAVE, RETURN
or SLEEP to select the time
period.
Use the AHEAD/BACK keys to
set the time and the WARMER/
COOLER keys to set the tem-
perature.
DAY
SLEEP
WAKE
AHEAD
BACK
13
LEAVE
RETURN
WARMER
COOLER
HEAT
SLEEP
PM
SET
PT
SAT

Set the SUNDAY schedule. Use
the same procedure as for
weekdays.
14
Press and hold until SUN
appears on the display.
Press WAKE, LEAVE, RETURN,
or SLEEP to select the time
period.
Use the AHEAD/BACK keys to
set the time and the WARMER/
COOLER keys to set the tem-
perature.
You have completed setting the
program schedule and heating
temperatures. If you have air
conditioning, go to Step 3.
If you do not have air condition-
ing, press and release to start the
program. Go to Step 4.
DAY
SLEEP
WAKE
AHEAD
BACK
RUN
PROGRAM
NOTE: Some models will show
-AC, indicating the thermostat is
operating on backup batteries
until the thermostat is mounted
on the wallplate and the system
is powered.
LEAVE
RETURN
WARMER
COOLER
HEAT
SLEEP
PM
SET
PT
SUN
TUE
LEAVE
PM

PROGRAMMINGYOUR THERMOSTAT
STEP 3
SET THE COOLING
TEMPERATURES, IF YOU
HAVE AIR CONDITIONING
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. 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.
Press and release. The display
shows WAKE and the time and
temperature you programmed for
heating.
Press and release so COOL
shows on the display, along with
the preprogrammed cooling
temperature.
If display reads SAT or SUN,
press and hold until MON TUE
WED THU FRI appears.
WAKE
SET
HEAT/COOL
DAY
15
SUN HEAT
WAKE
AM
SET
PT
SUN COOL
WAKE
AM
SET
PT
MON TUE WED THU FRI COOL
WAKE
AM
SET
PT

16
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. If your
thermostat can switch automati-
cally between heating and
cooling, the cooling temperature
must be at least 2 degrees higher
than the corresponding heating
temperature. For example, if the
heating setting is 21°C, the
minimum cooling setting is 23°C.
If you desire a lower cooling
setting, the heating setting must
first be lowered accordingly.
WARMER
COOLER
MON TUE WED THU FRI COOL
WAKE
AM
SET
PT