Honeywell FocusPRO TH6110D Programmable Thermostat
Installation tips
Do not install in locations where the thermostat can be affected by:
- Drafts or dead spots behind doors and in corners.
- Hot or cold air from ducts.
- Sunlight or radiant heat from appliances.
- Concealed pipes or chimneys.
- Unheated/uncooled areas such as an outside wall behind the thermostat.
Pre-installation checklist
Package contents
Check to make sure your package includes the following items:
Required tools & supplies
- No. 2 Phillips screwdriver
- Small pocket screwdriver
- Drill
- Drill bit (3/16” for drywall, 7/32” for plaster)
- Hammer
- Pencil
- Electrical tape
- Level (optional)
Wallplate installation
Remove the wallplate from the thermostat as shown on the left, then follow the directions below for mounting.
- Insert a quick reference card in a slot in the back of the thermostat.
- Pull wires through the wire hole.
- Position the wallplate on the wall, level, and mark hole positions with a pencil.
- Drill holes at marked positions as shown below, then tap in supplied wall anchors.
- Place wallplate over anchors, insert and tighten mounting screws.
Wiring
- Loosen screw terminals, insert wires into the terminal block, then re-tighten screws.
- Push excess wire back into the wall opening. Keep wires in a shaded area as shown at left.
- Plug the wall opening with nonflammable insulation to prevent drafts from affecting thermostat operation.
Terminal Designations
- G Fan relay.
- W O/B Heat relay or changeover valve terminal for heat pumps.
- C Common wire from the secondary side of the cooling system transformer.
- Y Compressor contactor.
- R Heating power. Connect to the secondary side of the heating system transformer.
- Rc Cooling power. Connect to the secondary side of the cooling system transformer.
Wiring diagrams
- Power supply. Provide disconnect means and overload protection as required.
- Factory-installed jumper. Remove for 2-transformer systems only.
- Optional 24VAC common connection.
- In Installer Setup, set the system type to Heat Only.
- In Installer Setup, set the system type to Heat Pump & changeover the valve to 0 or B.
Wiring diagrams
- Power supply. Provide disconnect means and overload protection as required.
- Factory-installed jumper. Remove for 2-transformer systems only.
- Optional 24VAC common connection.
- In Installer Setup, set the system type to Heat Only.
- In Installer Setup, set the system type to Heat Pump & changeover the valve to 0 or B.
Power options & mounting
AC Power
The thermostat can be powered by 24 VAC power, or by batteries. To wire the thermostat for AC power,
connect the common side of the cooling transformer to the “C” terminal as shown on the left.
Important: Remove R/Rc jumper for 2-transformer systems only. (See wiring diagram on page 5.)
Battery Power
Battery PowerThe thermostat can be powered by batteries alone or, if used with AC power, can provide backup power.
During power interruptions, the batteries will save time/day settings and power the display. After installation, batteries can be changed without removing the thermostat from the wall (see page 11).
To Mount Thermostat
Align the 4 tabs on the wallplate with corresponding slots on the back of the thermostat, then push gently until the thermostat snaps in place.
Installer setup
Follow the procedure below to configure the thermostat to match the installed heating/cooling system, and customize feature operation as desired.
Installer system test
Follow the procedure below to test the heating, cooling and fan.
CAUTION: EQUIPMENT DAMAGE HAZARD
Compressor protection (minimum off time) is bypassed during testing. To prevent equipment damage, avoid cycling the compressor quickly.
Auto Changeover (Setup Function 12)
Auto Changeover is a feature used in climates where both air conditioning and heating are used on the same day. When the system is set to Auto, the thermostat automatically selects heating or cooling depending on the indoor temperature. Heat and cool settings must be at least 3 degrees apart. The thermostat will automatically adjust settings to maintain this 3-degree separation (called “deadband”). The 3-degree separation between heating and cooling set temperatures is fixed, and cannot be changed.
Adaptive Intelligent Recovery™ (Setup Function 13)
Adaptive Intelligent Recovery™ (Setup Function 13)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 a.m. and the temperature to 70°. The heat will come on before 6 a.m., so the temperature will be 70° by the time you wake at 6.
Built-in compressor protection (Setup Function 15)
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 feature forces the compressor to wait for a few minutes before restarting. During the wait time, the message Cool On or Heat On (heat pumps only) will flash on the display. When the safe wait time has elapsed, the message stops flashing and the compressor turns on.
A quick reference to controls
Quick reference to display screen
Battery replacement
In case of difficulty
If you have difficulty with your thermostat, please try the suggestions below. Most problems can be corrected quickly and easily.
The display is blank
- Check the circuit breaker and reset if necessary.
- Make sure the power switch at the heating & cooling system is on.
- Make sure the furnace door is closed securely.
- If the thermostat is battery-powered, make sure fresh AA alkaline batteries are correctly installed (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).
The heating system does not respond (“Heat On” appears on the screen)
- Check for 24 Vac at the equipment on the secondary side of the transformer between power and common. If voltage is not present, check the heating equipment to find the cause of the problem.
- Check for 24 Vac between the heat terminal (W) and the transformer common. If 24 Vac is present, the thermostat is functional. Check the heating equipment to find the cause of the problem.
- Check for loose or broken wires between the thermostat and the heating equipment.
The cooling system does not respond (“Cool On” appears on the screen)
- Check for 24 Vac at the equipment on the secondary side of the transformer between power and common. If voltage is not present, check the cooling equipment to find the cause of the problem
- Check for 24 Vac between the cooling terminal (Y) and the transformer common. If 24 Vac is present, the thermostat is functional. Check the cooling system to find the cause of the problem.
- Check for loose or broken wires between the thermostat and the cooling equipment.
The fan does not turn on in a call for heat
- Check Installer Setup, Function 3 (Fan Control), to make sure the fan control is properly set to match the type of system (see page 8).
Heat pump issues cool air in heat mode, or warm air in cool mode
- Check Installer Setup, Function 2 (Changeover Valve), to make sure it is properly configured for your system (see page 8).
Heat/cool both on at the same time, or heat does not turn off
- Check Installer Setup, Function 1 (System Type), to make sure it is set to match the installed heating/cooling equipment (see page 8).
- Check to make sure the heating and cooling wires are not shorted together.
The heating equipment is running in cool mode
- Check Installer Setup, Function 1 (System Type), to make sure it is set to match the installed heating/cooling equipment (see page 8).
Cannot change a system set to “Heat”
- Check Installer Setup, Function 1 (System Type), to make sure it is set to match the installed heating equipment (see page 8).
- Change Installer Setup, Function 12 (System Setting) to Manual or Auto Changeover (see page 8).
Cannot change a system setting to “Cool”
- Check Installer Setup, Function 1 (System Type), to make sure it is set to match the installed cooling equipment (see page 8).
- Change Installer Setup, Function 12 (System Setting) to Manual or Auto Changeover (see page 8).
“Heat On” is not displayed
- Change the System Setting to Heat, and set the temperature level above the current room temperature.
“Cool On” is not displayed
- Change the System Setting to Cool, and set the temperature level below the current room temperature.
Accessories & replacement parts
Please contact your distributor to order replacement parts.
- Battery holder ………………………………………………Part Number 50007072-001
- Cover plate assembly ………………………………….Part Number 50002883-001 (Use to cover marks left by old thermostats.)
Specifications
Temperature Ranges
- Heat: 40° to 90°F (4.5° to 32°C)
- Cool: 50° to 99°F (10° to 37°C)
Operating Ambient Temperature
- 32° to 120°F (0° to 48.9°C)
Shipping Temperature
- -20° to 120°F (-28.9° to 48.9°C)
Operating Relative Humidity
- 5% to 90% (non-condensing)
Physical Dimensions
- 3-9/16” H x 5-13/16” W x 1-1/2” D
- 91 mm H x 147 mm W x 38 mm D
Electrical Ratings
For more manuals by Honeywell, visit ManualsLibraryy
Honeywell FocusPRO TH6110D Programmable Thermostat-FAQs
Why does my Honeywell thermostat keep shutting off?
Your thermostat may be turning off due to:
1. Power Issues: Ensure it has a stable power supply, as fluctuations or interruptions can cause resets.
2. Wiring Problems: Loose or faulty wiring can lead to erratic behavior. Check that all connections are secure and properly installed.
How do I change the temperature set point on my Honeywell thermostat?
To adjust the heat set point when in Auto Cool mode:
1. Press the Mode button until the display shows Heat.
2. Use the + or – buttons to set the desired temperature.
3. Press Mode again to switch back to Auto Changeover.
How does a Honeywell thermostat measure temperature?
Honeywell digital thermostats consider both:
1. Ambient air temperature
2. Radiant heat from objects in the room (walls, furniture, etc.)
This provides a more accurate representation of how the temperature feels in your space.
How do I set my Honeywell thermostat?
1. Use the up/down buttons or dial to select the desired temperature.
2. If programmable, enter programming mode and set schedules based on time of day or day of the week.
Why does my thermostat turn off unexpectedly?
The safety switch detects hazardous conditions, such as excessive moisture or high temperatures, and shuts down the system to prevent damage.
What is the best programmable thermostat?
Some top choices include:
1. Google Nest – A smart thermostat with remote control and scheduling via an app.
2. Orbit Clear Comfort – A non-smart, programmable thermostat with user-friendly settings.
Does the Honeywell thermostat have an Auto Mode?
Yes, in Auto Mode, the thermostat follows a programmed temperature schedule automatically.
How does a thermostat work?
A thermostat monitors room temperature and compares it to the set value. If the temperature goes above or below the set range, it activates heating or cooling to maintain comfort.