Honeywell PRO TH4000 series User manual

Operating
Manual
PRO TH4000 Series
Programmable Thermostat
69-1760ES-1

Read and save these instructions.
® U.S. Registered Trademark. Patents pending.
Copyright © 2006 Honeywell International Inc. All rights reserved.
Quick Reference Card
Grasp and pull to see basic operating instructions at a glance.
This manual covers the following models:
TH4110D: For 1 Heat/1 Cool systems
TH4210D: For 2 Heat/1 Cool heat pump systems only
(Pull thermostat from wallplate and turn over to find model number.)
Need Help?
For assistance with this product please visit http://yourhome.honeywell.com
or call Honeywell Customer Care toll-free at 1-800-468-1502
CAUTION: EQUIPMENT DAMAGE HAZARD.
To prevent possible compressor damage, do not operate cooling system when outdoor
temperature is below 50°F (10°C).

1
About your new thermostat
Thermostat features...................................2
Programming at a glance .......................... 3
Quick reference to controls....................... 4
Quick reference to display ........................5
Programming & Operation
Set time and day........................................6
System switch (Heat/Cool)........................7
Fan switch (Auto/On) .................................8
Using program schedules .........................9
Program schedule overrides ...................12
Adaptive Intelligent Recovery™..............14
Compressor protection............................15
Appendices
Battery replacement ................................16
In case of difficulty...................................17
Customer assistance ............................... 19
Accessories............................................. .19
5-year limited warranty............................20
This thermostat is ready to go!
Your new thermostat is pre-programmed
and ready to go.
See page 3 to check settings.
Table of contents
PRO TH4110D / TH4210D

Your new Honeywell thermostat has been designed to give you many years of reliable
service and easy-to-use, push-button climate control.
Features
• Separately programmable weekday/weekend schedules.
• One-touch temp control overrides program schedule at any time.
• Energy Star®compliant to greatly reduce your heating/cooling expenses.
• Large, clear, backlit display is easy to read.
• Displays both room temperature and temperature setting.
• Built-in compressor protection.
Operating Manual
2
About your new thermostat

PRO TH4110D / TH4210D
3
Your new thermostat is pre-programmed. Just set the time and day. Then check the
settings below and change if needed:
1. Set time and day (required for proper operation).........................See page 6
2. Select system setting: Preset to Off..................................................See page 7
3. Select fan setting: Preset to Auto......................................................See page 8
4. Program schedules: Preset to energy-saving levels
(assumes you wake at 6 am, leave at 8 am, return
at 6 pm and sleep at 10 pm) ....................................................... See pages 11-13
ONE-TOUCH TEMP CONTROL: You can override the program schedule at any time,
and manually adjust the temperature (see pages 12-13).
This thermostat is ready to go!

Operating Manual
4
Temperature adjustment (see page 11-13)
Fan Switch (see page 8)
On: Fan runs continuously.
Auto: Fan runs only when heating
or cooling system is on.
Quick reference to controls
• Set: Press to set time/day/
schedule.
• Hold: Press to override
programmed temperature control.
• Run: Press to resume program
schedule.
System switch (see page 7)
• Cool: Cooling system control.
• Off: All systems off.
• Heat: Heating system control.
• Em Heat: Emergency & Auxiliary
Heat control. Compressor is
locked out. (Select models only.)

PRO TH4110D / TH4210D
5
Wake
Wed
Recovery
Em Aux
Heat On
Set To
Inside
AM
75
75
6:30
Replace Batt
Quick reference to display screen
Low battery warning
(see page 16)
Adaptive Intelligent RecoveryTM
(see page 14)
Temperature setting
(see pages 11-13)
System status
Cool on: Cooling
system is on.
Heat on: Heating
system is on.
Em: Emergency heat
is on.**
Aux: Auxiliary heat
is on.**
** Only for heat pumps with this
capability (select models only).
Current day/time (see page 6)
Current inside
temperature
Current program period
Wake/Leave/Return/Sleep
(see pages 9-10)

Operating Manual
6
1. Press the SET button, then press s or t
to set the clock time.
2. Press the SET button, then press s or t
to select the day of the week.
3. Press RUN to save & exit.
Note: If the display flashes Set Clock, the
thermostat will follow your settings for the
weekday “Wake” time period until you reset
the time and day.
Set the time and day
Press SET, then adjust time.
Press SET, then select current day.
Set
Clock
AM
6:30
Wed
Set Day

PRO TH4110D / TH4210D
7
The SYSTEM switch can be set to control
your heating or cooling system, depend-
ing on the season.
• Cool: Cooling system control.
• Off: All systems are off.
• Heat: Heating system control.
• Em Heat: Emergency & Auxiliary
Heat control. Compressor is locked
out. (Select models only.)
System switch
Set SYSTEM switch to control the
heating or cooling system.
CAUTION: EQUIPMENT DAMAGE
HAZARD. Do not operate cooling
system when outdoor temperature
is below 50°F (10°C).

Operating Manual
8
Fan switch
Set the FAN switch to Auto or On.
In “Auto” mode (the most commonly used
setting), the fan runs only when the heat-
ing or cooling system is on.
If set to “On,” the fan runs continuously.
Use this setting for improved air circula-
tion, or for more efficient air cleaning.
Set FAN switch to choose whether the fan
runs continuously or only as needed.

PRO TH4110D / TH4210D
9
It’s easy to program your system for maximum energy savings. You can program
four time periods each day, with different settings for weekdays and weekends.
Set to the time you awaken and the temperature you want
during the morning, until you leave for the day.
Set to the time you leave home and the temperature you want
while you are away (usually an energy-saving level).
Set to the time you return home and the temperature you
want during the evening, until bedtime.
Set to the time you go to bed and the temperature you want
overnight (usually an energy-saving level).
Save money by setting program schedules
WAKE
6:00 am
70 °
LEAVE
8:00 am
62 °
RETURN
6:00 pm
70 °
SLEEP
10:00 pm
62 °

Operating Manual
10
Wake
(6:00 am)
Leave
(8:00 am)
Return
(6:00 pm)
Sleep
(10:00 pm)
Cool (Mon-Fri)Heat (Mon-Fri) Heat (Sat-Sun) Cool (Sat-Sun)
70 °75 °70 °75 °
62 °83 °62 °
[Or cancel period]
83 °
[Or cancel period]
70 °75 °70 °
[Or cancel period]
75 °
[Or cancel period]
62 °78 °62 °78 °
This thermostat is pre-set to use Energy Star®program settings. We recommend
these settings, since they can reduce your heating/cooling expenses by as much as
33%. (See next page to adjust times and temperatures of each time period.)
Energy Star®settings for maximum cost savings

PRO TH4110D / TH4210D
11
To adjust program schedules
1. Press SET until Set Schedule is displayed.
2. Press s or t to set your weekday Wake
time (Mon-Fri), then press SET.
3. Press s or t to set the temperature for this
time period, then press SET.
4. Set time and temperature for the next time
period (Leave). Repeat steps 2 and 3 for each
weekday time period.
5. Press SET to set weekend time periods (Sat-
Sun), then press RUN to save & exit.
Note: Make sure the thermostat is set to the system
you want to program (Heat or Cool).
Note: To cancel an unwanted time period (except
Wake), press and hold s+ HOLD for 4 seconds
while in the Set Schedule mode.
Press SET 3 times, then adjust time.
Press SET, then set desired temperature.
Wake
Set Schedule
MonTueWedThuFri
Heat
Set To
AM
75
6:30
Wake
Set Schedule
MonTueWedThuFri
Heat
Set To
AM
75
6:30

Operating Manual
12
Press s or t to immediately adjust the
temperature. This will temporarily override
the temperature setting for the current time
period.
The new temperature will be maintained
only until the next programmed time period
begins (see page 9). For example, if you
want to turn up the heat early in the morning,
it will automatically be lowered later, when
you leave for the day.
To cancel the temporary setting at any time,
press RUN.
Program schedule override (temporary)
Press to temporarily adjust temperature.
Press to resume program schedule.
Set To
AM
70
6:30
Temporary
Set To
AM
75
6:30
Note: Make sure the thermostat
is set to the system you want to
control (heat or cool).

PRO TH4110D / TH4210D
13
Note: Make sure the thermostat is set
to the system you want to control (heat
or cool).
Press to permanently adjust temperature. Press HOLD to permanently adjust
the temperature. This will override
the temperature settings for all time
periods.
The “Hold” feature turns off the
program schedule and allows you to
adjust the thermostat manually, as
needed.
Whatever temperature you set will be
maintained 24 hours a day, until you
manually change it, or press RUN to
cancel “Hold” and resume the program
schedule.
Program schedule override (permanent)
Set To
AM
70
6:30
Hold
Set To
AM
75
6:30
Press to resume program schedule.

Operating Manual
14
Adaptive Intelligent Recovery eliminates guesswork when setting your schedule.
It allows the thermostat to “learn” how long your furnace and air conditioner take
to reach the temperature you want.
Just set your program schedule to the time you want the house to reach your desired
temperature. The thermostat then turns on the heating or cooling at just the right time
to reach your scheduled temperature at your scheduled time.
For example: Set the Wake time to 6 am and the temperature to 70°. The heat will
come on before 6 am, so the temperature is 70° by the time you wake at 6.
Adaptive Intelligent RecoveryTM (AIR)

PRO TH4110D / TH4210D
15
Wake
Wed
Cool
On
Set ToInside
AM
75
75
6:30
This feature helps prevent damage to the
compressor in your air conditioning or heat
pump system.
Damage can occur if the compressor is
restarted too soon after shutdown. This fea-
ture forces the compressor to wait for a few
minutes before restarting.
During the wait time, the display will flash
the message Cool On (or Heat On if you have
a heat pump). When the safe wait time has
elapsed, the message stops flashing and the
compressor turns on.
Message flashes until safe restart
time has elapsed.
Built-in compressor protection

Operating Manual
16
Batteries are optional (for backup
power) if your thermostat was wired
to run on AC power when installed.
Install fresh batteries when the
REPLACE BATT warning begins flash-
ing. The warning flashes about two
months before the batteries are
depleted.
Replace batteries once a year, or
before leaving home for more than a
month. If batteries are inserted within
one minute, the time and day will not
have to be reset. All other settings are
permanently stored in memory, and
do not require battery power.
Pull at bottom to
remove thermostat
from wallplate.
Turn thermostat over,
insert fresh AA alkaline
batteries, then reinstall
thermostat.
Battery replacement

PRO TH4110D / TH4210D
17
If you have difficulty with your thermostat, please try the following suggestions.
Most problems can be corrected quickly and easily.
Display is blank • Check circuit breaker and reset if necessary.
• Make sure power switch at heating & cooling system is on.
• Make sure furnace door is closed securely.
• Make sure fresh AA alkaline batteries are correctly installed (see
page 16).
Heating or
cooling system
does not respond
• Set system switch to Heat (see page 7). Make sure the temperature is
set higher than the Inside temperature.
• Set system switch to Cool (see page 7). Make sure the temperature is
set lower than the Inside temperature.
• Wait 5 minutes for the system to respond.
In case of difficulty

Operating Manual
18
Temperature
settings do not
change
Make sure heating and cooling temperatures are set to acceptable ranges:
• Heat: 40° to 90°F (4.5° to 32°C).
• Cool: 50° to 99°F (10° to 37°C).
“Cool On” or
“Heat On” is
flashing
•Compressor protection feature is engaged. Wait 5 minutes for the system
to restart safely, without damage to the compressor (see page 15).
“Heat On” is not
displayed
•Set the System switch to Heat, and set the temperature level above the
current room temperature (see page 7).
“Cool On” is not
displayed
•Set the System switch to Cool, and set the temperature level below the
current room temperature (see page 7).
To restore
Energy Star®
default settings
Follow these steps to restore Energy Star default settings (see page 10):
1. Press SET 3 times to display “Set Schedule.”
2. Press and hold SET and RUN at the same time for 4 seconds.
3. Press RUN.
In case of difficulty