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
5
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
5
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
7
Operating Manual
6
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
7
Operating Manual
6
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
9
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