Honeywell PRO TH4110B User manual

Operating
Manual
TH4110B
Programmable Thermostat

® U.S. Registered Trademark. Patents pending.
Copyright © 2005 Honeywell International Inc. All rights reserved.
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Quick Reference Card
Grasp and pull to see basic
operating instructions at a glance.
Need Help?
For assistance with this product please visit www.honeywell.com/yourhome
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).

PRO TH4110B Programmable Thermostat
1
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Thermostat features ........................2
Programming at a glance ................3
Quick reference to controls............4
Quick reference to display..............5
PPrrooggrraammmmiinngg&&OOppeerraattiioonn
Set time and day..............................6
System switch (Heat/Cool) ............7
Fan switch (Auto/On) ......................8
Using program schedules................9
Program schedule overrides ........12
Compressor protection ................14
AAppppeennddiicceess
Battery replacement......................15
In case of difficulty ......................16
Customer assistance......................18
Accessories....................................18
Limited warranty ..........................19
Table of contents
This thermostat is ready to go!
Your new thermostat is pre-
programmed and ready to go.
See page 3 to check settings.
CAUTION: EQUIPMENT DAMAGE
HAZARD. To prevent possible
compressor damage, do not operate
cooling system when outdoor
temperature is below 50°F (10°C).

Operating Manual
2
About your new thermostat
Congratulations on the purchase of your new Honeywell thermostat. It 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.
• EnergyStar®compliant to greatly reduce your heating/cooling expenses.
• Large, clear display is easy to read.
• Displays both room temperature and temperature setting.
• Built-in compressor protection.

PRO TH4110B Programmable Thermostat
3
This thermostat is ready to go!
Your new thermostat is pre-programmed and ready to go.All you have to do is set
the time and day.Then check the settings below and change if needed:
1SSeettttiimmeeaannddddaayy((rreeqquuiirreeddffoorrpprrooppeerrooppeerraattiioonn))................................See page 6
2SSeelleeccttssyysstteemmsseettttiinngg((HHeeaatt//CCooooll))::Preset to Heat..............To change, see page 7
3SSeelleeccttffaannsseettttiinngg((AAuuttoo//OOnn))::Preset to Auto ......................To change, see page 8
4PPrrooggrraammsscchheedduulleess::Preset to energy-saving levels
while you’re at work or asleep (assumes you
wake at 6 am, leave at 8 am, return at 6 pm
and go to bed at 10 pm) ..............................................To change, see pages 9-11
ONE-TOUCH TEMP CONTROL: You can override the program schedule at any time,
and manually adjust the temperature (see pages 12-13).

Operating Manual
4
Quick reference to controls
Digital display (see page 5) Temperature adjustment (see pages 11-13)
•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: Thermostat controls only
the cooling system.
•Heat: Thermostat controls only
the heating system.
•Off: Heating and cooling
systems are off.
Fan switch (see page 8)
On: Fan runs continuously.
Auto: Fan runs only when heating
or cooling system is on.

PRO TH4110B Programmable Thermostat
5
Inside Set To
75 6:30 AM
75
Wake Cool
On
°°
Replace Batt
Quick reference to display screen
Current inside
temperature
Low battery warning
(see page 15)
Current day/time (see page 6)
Current program period
Wake/Leave/Return/Sleep
(see pages 10-11)
Temperature setting
(see pages 11-13)
System status
Heat On/Cool On
(If flashing, see page 14)
Wed

Operating Manual
6
Set the time and day
1 Press the SSEETTbutton, then press
or to set the clock time.
2 Press the SSEETTbutton, then press
or to select the day of the
week.
3 Press RRUUNNto 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.
Press SSEETT, then adjust time
6:30 AM
Set
Clock
Press SSEETT, then select current day
Wed
Set Day

PRO TH4110B Programmable Thermostat
7
System switch
The SSYYSSTTEEMMswitch can be set to con-
trol your heating or cooling system,
depending on the season.
•HHeeaatt::Thermostat controls only
the heating system.
•CCooooll::Thermostat controls only
the cooling system.
•OOffff::Heating and cooling
systems are off.
Set SSYYSSTTEEMMswitch to control the heating or
cooling system.
CAUTION: EQUIPMENT DAMAGE
HAZARD. To prevent possible
compressor damage, do not operate
cooling system when outdoor
temperature is below 50°F (10°C).

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

PRO TH4110B Programmable Thermostat
9
WAKE
6:00 am
70 °
LEAVE
8:00 am
62 °
RETURN
6:00 pm
70 °
SLEEP
10:00 pm
62 °
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
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.

Operating Manual
10
EnergyStar®settings for maximum cost savings
This thermostat is pre-set to use EnergyStar®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.)
70
°
75
°
70
°
75
°
62
°
83
°
62
°
83
°
70
°
75
°
70
°
75
°
62
°
78
°
62
°
78
°
Heat (Mon-Fri) Cool (Mon-Fri) Heat (Sat-Sun) Cool (Sat-Sun)
Wake
(6:00 am)
Leave
(8:00 am)
Return
(6:00 pm)
Sleep
(10:00 pm)
[Or cancel period]
[Or cancel period]
[Or cancel period]
[Or cancel period]

PRO TH4110B Programmable Thermostat
11
To adjust program schedules
1 Press SSEETTuntil Set Schedule is displayed.
2 Press or to set your weekdayWake
time (Mon-Fri), then press SSEETT.
3 Press or to set the temperature for
this time period, then press SSEETT.
4 Set time and temperature for the next
time period (Leave). Repeat steps 2 and 3
for each weekdaytime period.
5 Press SSEETTto set weekend time periods
(Sat-Sun), then press RRUUNNto 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 + HHOOLLDDfor 4 seconds
while in the Set Schedule mode.
Press SSEETT3 times, then adjust time
Press SSEETT, then set desired temperature
Set To
6:30 AM
75
Wake
Heat
°
MonTueWedThuFri
Set Schedule
Set To
6:30 AM
75
Wake
Heat
°
MonTueWedThuFri
Set Schedule

Set To
6:30 AM
70 °
Temporary
Operating Manual
12
Program schedule override (temporary)
Press or 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 10). For example, if you
want to turn up the heat early in the morn-
ing, it will automatically be lowered later,
when you leave for the day.
To cancel the temporary setting at any time,
press RRUUNN.
Note: Make sure the thermostat is set
to the system you want to control
(heat or cool).
Press to temporarily adjust temperature
Set To
6:30 AM
75°
Press to resume program schedule

PRO TH4110B Programmable Thermostat
13
Program schedule override (permanent)
Press HHOOLLDDto 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 RRUUNNto cancel
“Hold” and resume the program schedule.
Set To
6:30 AM
70 °
Hold
Note: Make sure the thermostat is set
to the system you want to control
(heat or cool).
Press to permanently adjust temperature
Set To
6:30 AM
75°
Press to resume program schedule

Operating Manual
14
Built-in compressor protection
This feature helps prevent damage to the
compressor in the air conditioning or heat
pump system.
Damage can occur if the compressor is re-
started too soon after shutdown.This feature
forces the compressor to wait for a few
minutes before restarting.
During the wait time, the message Cool On
(or Heat On if you have a heat pump) will
flash on the display.When the safe wait time
has elapsed, the message stops flashing and
the compressor turns on.
Inside Set To
75 6:30 AM
75
Cool
On
°°
Message flashes until safe
restart time has elapsed
Wake
Wed

PRO TH4110B Programmable Thermostat
15
Battery replacement
Install fresh batteries immediately
when the RREEPPLLAACCEEBBAATTTTwarning begins
flashing.The warning flashes about
two months before the batteries are
depleted.
Even if the warning does not appear,
you should replace batteries once a
year, or before leaving home for more
than a month.
If batteries are inserted within 1
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.
Grasp and pull to
remove thermostat
Turn thermostat over,
insert fresh AA alkaline
batteries, then reinstall
thermostat

Operating Manual
16
In case of difficulty
If you have difficulty with your thermostat, please try the suggestions below. Most
problems can be corrected quickly and easily.
Display is blank • Make sure fresh AA alkaline batteries are correctly installed (see page 15).
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.
• Check circuit breaker and reset if necessary.
• Make sure power switch at heating & cooling system is on.
• Make sure furnace door is closed securely.
• Wait 5 minutes for the system to respond.

PRO TH4110B Programmable Thermostat
17
In case of difficulty
To restore
Energy Star®
default settings
Follow these steps to restore Energy Star default settings (see page 10):
1 Press SSEETT3 times to display “Set Schedule.”
2Press and hold SSEETTand RRUUNNat the same time for 4 seconds.
3 Press RRUUNN.
“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 14).
“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).
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).

Operating Manual
18
Customer assistance
For assistance, please visit
wwwwww..hhoonneeyywweellll..ccoomm//yyoouurrhhoommee.
Or call Honeywell Customer Care
toll-free at 11--880000--446688--11550022.
To save time, please note your model
number and date code before calling.
Accessories
For accessories, please call Honeywell
Customer Care toll-free at
11--880000--446688--11550022.
Cover plate ................Part No. 50002883-001
(Used to cover marks left by old thermostats.)
Grasp and pull to
remove thermostat
Turn thermostat over
to find model number
and date code