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