Owner's Manual
Page 4
Features • Large, clear, backlit display is easy to -use, push-button climate control. ENGLISH Operating Manual About your new thermostat Your new Honeywell thermostat has been designed to give you many years of reliable service and easy-to read, even in the dark. • Displays both room temperature and temperature setting. • Built-in compressor protection. 69-1776EFS-01 2
Features • Large, clear, backlit display is easy to -use, push-button climate control. ENGLISH Operating Manual About your new thermostat Your new Honeywell thermostat has been designed to give you many years of reliable service and easy-to read, even in the dark. • Displays both room temperature and temperature setting. • Built-in compressor protection. 69-1776EFS-01 2
Owner's Manual
Page 6
ENGLISH Operating Manual Quick reference to display screen Current inside temperature Inside Set To 75 75 Low battery warning (see page 9) Replace Batt Em Aux Heat On M29418 System Status • Cool On: Cooling system is on. • Heat On: Heating system is on. • Em: Emergency heat is on. ** • Aux: Auxiliary heat is on. ** Temperature setting If "Heat On" or "Cool On" is flashing, compressor protection is engaged (see page 8). 69-1776EFS-01 ** Only for heat pumps with this capability (select models only). 4
ENGLISH Operating Manual Quick reference to display screen Current inside temperature Inside Set To 75 75 Low battery warning (see page 9) Replace Batt Em Aux Heat On M29418 System Status • Cool On: Cooling system is on. • Heat On: Heating system is on. • Em: Emergency heat is on. ** • Aux: Auxiliary heat is on. ** Temperature setting If "Heat On" or "Cool On" is flashing, compressor protection is engaged (see page 8). 69-1776EFS-01 ** Only for heat pumps with this capability (select models only). 4
Owner's Manual
Page 7
Do not operate cooling system when outdoor temperature is locked out. (Select models only.) CAUTION: EQUIPMENT DAMAGE HAZARD. Compressor is below 50°F (10°C). 5 69-1776EFS-01 ENGLISH System switch M29417 Set SYSTEM switch to control your heating or cooling system, depending on the season. • Cool: Cooling system control. • Off: All systems are off. • Heat: Heating system control. • Em Heat: Emergency & Auxiliary Heat control. PRO TH3110D / TH3210D The SYSTEM switch can be set to control the heating or cooling system.
Do not operate cooling system when outdoor temperature is locked out. (Select models only.) CAUTION: EQUIPMENT DAMAGE HAZARD. Compressor is below 50°F (10°C). 5 69-1776EFS-01 ENGLISH System switch M29417 Set SYSTEM switch to control your heating or cooling system, depending on the season. • Cool: Cooling system control. • Off: All systems are off. • Heat: Heating system control. • Em Heat: Emergency & Auxiliary Heat control. PRO TH3110D / TH3210D The SYSTEM switch can be set to control the heating or cooling system.
Owner's Manual
Page 8
In "Auto" mode (the most commonly used setting), the fan runs only when the heating or cooling system is on. M29417 Set FAN switch to "On," the fan runs continuously. If set to choose whether the fan runs continuously or only as needed. 69-1776EFS-01 6 ENGLISH Operating Manual Fan switch Set the FAN switch to Auto or On.
In "Auto" mode (the most commonly used setting), the fan runs only when the heating or cooling system is on. M29417 Set FAN switch to "On," the fan runs continuously. If set to choose whether the fan runs continuously or only as needed. 69-1776EFS-01 6 ENGLISH Operating Manual Fan switch Set the FAN switch to Auto or On.
Owner's Manual
Page 9
Desired temperature. M29419 Temperature adjustment buttons. 7 69-1776EFS-01 ENGLISH ATebmoupteyraotuurrenecwontthreorlms ostat Inside 78 Set To 75 Cool On PRO TH3110D / TH3210D Press the temperature adjustment buttons until the temperature you want is set to the system you want to control (Heat or Cool). Note: Make sure the SYSTEM switch is displayed in the upper right portion of the screen.
Desired temperature. M29419 Temperature adjustment buttons. 7 69-1776EFS-01 ENGLISH ATebmoupteyraotuurrenecwontthreorlms ostat Inside 78 Set To 75 Cool On PRO TH3110D / TH3210D Press the temperature adjustment buttons until the temperature you want is set to the system you want to control (Heat or Cool). Note: Make sure the SYSTEM switch is displayed in the upper right portion of the screen.
Owner's Manual
Page 10
... restarting. Damage can occur if the compressor is restarted too soon after shutdown. This feature forces the compressor to the compressor in compressor protection Inside Set To 75 75 Cool On M29420 Message flashes until safe restart time has elapsed.
... restarting. Damage can occur if the compressor is restarted too soon after shutdown. This feature forces the compressor to the compressor in compressor protection Inside Set To 75 75 Cool On M29420 Message flashes until safe restart time has elapsed.
Owner's Manual
Page 11
... are permanently stored in memory, and do not require battery power. 9 69-1776EFS-01 ENGLISH Batteries provide backup power to remove thermostat from wallplate. All settings are depleted. The warning flashes about two months before leaving home for backup power) if your thermostat was wired to run on AC power when...
... are permanently stored in memory, and do not require battery power. 9 69-1776EFS-01 ENGLISH Batteries provide backup power to remove thermostat from wallplate. All settings are depleted. The warning flashes about two months before leaving home for backup power) if your thermostat was wired to run on AC power when...
Owner's Manual
Page 12
...8226; Check circuit breaker and reset if necessary. • Make sure power switch at heating & cooling system is on. • Make sure furnace door is set higher than the Inside temperature. • Wait 5 minutes for the system to Cool (see page 5). ENGLISH Operating Manual In case of difficulty If you have...suggestions. Make sure the temperature is closed securely. • Make sure fresh AA alkaline batteries are correctly installed (see page 5). does not respond • Set system switch to respond. 69-1776EFS-01 10 Most problems can be corrected quickly and easily.
...8226; Check circuit breaker and reset if necessary. • Make sure power switch at heating & cooling system is on. • Make sure furnace door is set higher than the Inside temperature. • Wait 5 minutes for the system to Cool (see page 5). ENGLISH Operating Manual In case of difficulty If you have...suggestions. Make sure the temperature is closed securely. • Make sure fresh AA alkaline batteries are correctly installed (see page 5). does not respond • Set system switch to respond. 69-1776EFS-01 10 Most problems can be corrected quickly and easily.
Owner's Manual
Page 13
... to restart safely, without damage to 37°C). "Cool On" or "Heat On" is flashing • Compressor protection feature is not • Set the System switch to Cool, and set the temperature level below the displayed current room temperature (see page 7). 11 69-1776EFS-01 "Heat On" is not •...; Set the System switch to Heat, and set to acceptable ranges: • Heat: 40° to 90°F (4.5° to 32°C). • Cool: 50° to 99°F (10°...
... to restart safely, without damage to 37°C). "Cool On" or "Heat On" is flashing • Compressor protection feature is not • Set the System switch to Cool, and set the temperature level below the displayed current room temperature (see page 7). 11 69-1776EFS-01 "Heat On" is not •...; Set the System switch to Heat, and set to acceptable ranges: • Heat: 40° to 90°F (4.5° to 32°C). • Cool: 50° to 99°F (10°...