Honeywell PRO TH3110B User manual

Operating
Manual
TH3110B
Non-programmable Digital Thermostat

PRO TH3110B Digital Thermostat
1
AAbboouuttyyoouurrnneewwtthheerrmmoossttaatt
Thermostat features ........................2
Quick reference to controls............3
Quick reference to display..............4
TThheerrmmoossttaattOOppeerraattiioonn
System switch (Heat/Cool) ............5
Fan switch (Auto/On) ....................6
Temperature controls......................7
Compressor protection ..................8
AAppppeennddiicceess
Battery replacement........................9
In case of difficulty ......................10
Customer assistance......................12
Accessories....................................12
Limited warranty ..........................13
Table of contents
® U.S. Registered Trademark. Patents pending.
Copyright © 2005 Honeywell International Inc. All rights reserved.
Read and save these instructions
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

PRO TH3110B Digital Thermostat
1
AAbboouuttyyoouurrnneewwtthheerrmmoossttaatt
Thermostat features ........................2
Quick reference to controls............3
Quick reference to display..............4
TThheerrmmoossttaattOOppeerraattiioonn
System switch (Heat/Cool) ............5
Fan switch (Auto/On) ....................6
Temperature controls......................7
Compressor protection ..................8
AAppppeennddiicceess
Battery replacement........................9
In case of difficulty ......................10
Customer assistance......................12
Accessories....................................12
Limited warranty ..........................13
Table of contents
® U.S. Registered Trademark. Patents pending.
Copyright © 2005 Honeywell International Inc. All rights reserved.
Read and save these instructions
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

PRO TH3110B Digital Thermostat
3
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
• One-touch temperature controls
• Large, clear backlit display is easy to read, even in the dark
• Switchable fan control (auto or continuous fan)
• Displays both room temperature and temperature setting
• Built-in compressor protection
Quick reference to controls
Digital display screen Temperature buttons
Press to adjust temperature
settings
System switch
•Cool: Thermostat controls only
the cooling system
•Heat: Thermostat controls only
the heating system
•Off: Heating and cooling
systems are off
Fan switch
On: Fan runs continuously
Auto: Fan runs only when
heating or cooling system is on

PRO TH3110B Digital Thermostat
3
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
• One-touch temperature controls
• Large, clear backlit display is easy to read, even in the dark
• Switchable fan control (auto or continuous fan)
• Displays both room temperature and temperature setting
• Built-in compressor protection
Quick reference to controls
Digital display screen Temperature buttons
Press to adjust temperature
settings
System switch
•Cool: Thermostat controls only
the cooling system
•Heat: Thermostat controls only
the heating system
•Off: Heating and cooling
systems are off
Fan switch
On: Fan runs continuously
Auto: Fan runs only when
heating or cooling system is on

PRO TH3110B Digital Thermostat
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Operating Manual
4
Quick reference to display screen
Inside Set To
75 75
Heat On
Cool On
°°
Replace Batt
Current inside temperature
Low battery warning
Temperature setting
System switch
The SSYYSSTTEEMMswitch can be set to
control your heating or cooling
system, depending on the season.
When set to the Off position, the
thermostat will not activate the
heating or cooling system.
Set SSYYSSTTEEMMswitch to control the heating or
cooling system.
If flashing, compressor protection
is engaged (see page 8)
System status
On when “calling” for
heating or cooling;
flashes when waiting for
compressor restart (see
page 8)
CAUTION: EQUIPMENT DAMAGE
HAZARD. To prevent possible
compressor damage, do not operate
cooling system when outdoor
temperature is below 50°F (10°C).

PRO TH3110B Digital Thermostat
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Operating Manual
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Quick reference to display screen
Inside Set To
75 75
Heat On
Cool On
°°
Replace Batt
Current inside temperature
Low battery warning
Temperature setting
System switch
The SSYYSSTTEEMMswitch can be set to
control your heating or cooling
system, depending on the season.
When set to the Off position, the
thermostat will not activate the
heating or cooling system.
Set SSYYSSTTEEMMswitch to control the heating or
cooling system.
If flashing, compressor protection
is engaged (see page 8)
System status
On when “calling” for
heating or cooling;
flashes when waiting for
compressor restart (see
page 8)
CAUTION: EQUIPMENT DAMAGE
HAZARD. To prevent possible
compressor damage, do not operate
cooling system when outdoor
temperature is below 50°F (10°C).

PRO TH3110B Digital Thermostat
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Operating Manual
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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.
Temperature controls
Press the temperature adjustment
buttons until the temperature you
want is displayed in the upper right
portion of the screen.
Note: Make sure the SSYYSSTTEEMMswitch is
set to the system you want to
control (Heat or Cool).
Desired
temperature
Temperature adjustment
buttons
Inside Set To
78
75
Cool On
°°

PRO TH3110B Digital Thermostat
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Operating Manual
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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.
Temperature controls
Press the temperature adjustment
buttons until the temperature you
want is displayed in the upper right
portion of the screen.
Note: Make sure the SSYYSSTTEEMMswitch is
set to the system you want to
control (Heat or Cool).
Desired
temperature
Temperature adjustment
buttons
Inside Set To
78
75
Cool On
°°

Inside Set To
75 75
Cool On
°°
PRO TH3110B Digital Thermostat
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Operating Manual
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Built-in compressor protection
This feature helps prevent damage to the
compressor in your 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 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
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.
Always replace both batteries with
fresh,AA alkaline batteries.
Grasp and pull to
remove thermostat
Turn thermostat over,
insert fresh AA alkaline
batteries, then reinstall
thermostat

Inside Set To
75 75
Cool On
°°
PRO TH3110B Digital Thermostat
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Operating Manual
8
Built-in compressor protection
This feature helps prevent damage to the
compressor in your 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 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
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.
Always replace both batteries with
fresh,AA alkaline batteries.
Grasp and pull to
remove thermostat
Turn thermostat over,
insert fresh AA alkaline
batteries, then reinstall
thermostat

PRO TH3110B Digital Thermostat
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Operating Manual
10
“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 8).
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 9).
“Heat On” is
not displayed
• Set the System switch to Heat, and set the temperature level above the
current room temperature (see page 5).
“Cool On” is
not displayed
• Set the System switch to Cool, and set the temperature level below the
current room temperature (see page 5).
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).
Heating or
cooling system
does not respond
• Set system switch to Heat (see page 5). Make sure the temperature is
set higher than the Inside temperature.
• Set system switch to Cool (see page 5). 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.
In case of difficulty

PRO TH3110B Digital Thermostat
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Operating Manual
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“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 8).
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 9).
“Heat On” is
not displayed
• Set the System switch to Heat, and set the temperature level above the
current room temperature (see page 5).
“Cool On” is
not displayed
• Set the System switch to Cool, and set the temperature level below the
current room temperature (see page 5).
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).
Heating or
cooling system
does not respond
• Set system switch to Heat (see page 5). Make sure the temperature is
set higher than the Inside temperature.
• Set system switch to Cool (see page 5). 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.
In case of difficulty

PRO TH3110B Digital Thermostat
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Operating Manual
12
Honeywell warrants this product, excluding battery, to be free from defects in the
workmanship or materials, under normal use and service, for a period of two (2)
years from the date of purchase by the consumer. If at any time during the
warranty period the product is determined to be defective or malfunctions,
Honeywell shall repair or replace it (at Honeywell's option).
If the product is defective,
(i) return it, with a bill of sale or other dated proof of purchase, to the place from
which you purchased it; or
(ii) call Honeywell Customer Care at 1-800-468-1502. Customer Care will make the
determination whether the product should be returned to the following address:
Honeywell Return Goods, Dock 4 MN10-3860, 1885 Douglas Dr. N., Golden Valley,
MN 55422, or whether a replacement product can be sent to you.
Limited 2-year warrantyCustomer 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

PRO TH3110B Digital Thermostat
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Operating Manual
12
Honeywell warrants this product, excluding battery, to be free from defects in the
workmanship or materials, under normal use and service, for a period of two (2)
years from the date of purchase by the consumer. If at any time during the
warranty period the product is determined to be defective or malfunctions,
Honeywell shall repair or replace it (at Honeywell's option).
If the product is defective,
(i) return it, with a bill of sale or other dated proof of purchase, to the place from
which you purchased it; or
(ii) call Honeywell Customer Care at 1-800-468-1502. Customer Care will make the
determination whether the product should be returned to the following address:
Honeywell Return Goods, Dock 4 MN10-3860, 1885 Douglas Dr. N., Golden Valley,
MN 55422, or whether a replacement product can be sent to you.
Limited 2-year warrantyCustomer 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

PRO TH3110B Digital Thermostat
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Operating Manual
14
THIS WARRANTY IS THE ONLY EXPRESS WARRANTY HONEYWELL MAKES ON
THIS PRODUCT.THE DURATION OF ANY IMPLIED WARRANTIES, INCLUDING
THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE, IS HEREBY LIMITED TO THE TWO-YEAR DURATION OF THIS
WARRANTY. Some states do not allow limitations on how long an implied
warranty lasts, so the above limitation may not apply to you.
This warranty gives you specific legal rights, and you may have other rights which
vary from state to state.
If you have any questions concerning this warranty, please write Honeywell
Customer Relations, 1985 Douglas Dr, Golden Valley, MN 55422 or call 1-800-468-
1502. In Canada, write Retail Products ON15-02H, Honeywell Limited/
Honeywell Limitée, 35 Dynamic Drive, Scarborough, Ontario M1V4Z9.
Limited 2-year warranty
This warranty does not cover removal or reinstallation costs.This warranty shall
not apply if it is shown by Honeywell that the defect or malfunction was caused
by damage which occurred while the product was in the possession of a
consumer.
Honeywell's sole responsibility shall be to repair or replace the product within
the terms stated above. HONEYWELL SHALL NOT BE LIABLE FOR ANY LOSS OR
DAMAGE OF ANY KIND, INCLUDING ANY INCIDENTAL OR CONSEQUENTIAL
DAMAGES RESULTING, DIRECTLY OR INDIRECTLY, FROM ANY BREACH OF ANY
WARRANTY, EXPRESS OR IMPLIED, OR ANY OTHER FAILURE OF THIS PRODUCT.
Some states do not allow the exclusion or limitation of incidental or consequential
damages, so this limitation may not apply to you.
Limited 2-year warranty

PRO TH3110B Digital Thermostat
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Operating Manual
14
THIS WARRANTY IS THE ONLY EXPRESS WARRANTY HONEYWELL MAKES ON
THIS PRODUCT.THE DURATION OF ANY IMPLIED WARRANTIES, INCLUDING
THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE, IS HEREBY LIMITED TO THE TWO-YEAR DURATION OF THIS
WARRANTY. Some states do not allow limitations on how long an implied
warranty lasts, so the above limitation may not apply to you.
This warranty gives you specific legal rights, and you may have other rights which
vary from state to state.
If you have any questions concerning this warranty, please write Honeywell
Customer Relations, 1985 Douglas Dr, Golden Valley, MN 55422 or call 1-800-468-
1502. In Canada, write Retail Products ON15-02H, Honeywell Limited/
Honeywell Limitée, 35 Dynamic Drive, Scarborough, Ontario M1V4Z9.
Limited 2-year warranty
This warranty does not cover removal or reinstallation costs.This warranty shall
not apply if it is shown by Honeywell that the defect or malfunction was caused
by damage which occurred while the product was in the possession of a
consumer.
Honeywell's sole responsibility shall be to repair or replace the product within
the terms stated above. HONEYWELL SHALL NOT BE LIABLE FOR ANY LOSS OR
DAMAGE OF ANY KIND, INCLUDING ANY INCIDENTAL OR CONSEQUENTIAL
DAMAGES RESULTING, DIRECTLY OR INDIRECTLY, FROM ANY BREACH OF ANY
WARRANTY, EXPRESS OR IMPLIED, OR ANY OTHER FAILURE OF THIS PRODUCT.
Some states do not allow the exclusion or limitation of incidental or consequential
damages, so this limitation may not apply to you.
Limited 2-year warranty

Honeywell International Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
Honeywell Limited-Honeywell Limitée
35 Dynamic Drive
Scarborough, Ontario M1V 4Z9
Automation and Control Solutions
® U.S. Registered Trademark. Patents pending.
Copyright © 2005 Honeywell International Inc. All rights reserved.
Printed in U.S. Document number 69-1758. Date 01-2005.
www.honeywell.com/yourhome