Honeywell TH4110U2005 T4 Pro Instruction Manual

Manual Honeywell TH4110U2005 T4 Pro Instruction Manual

Honeywell TH4110U2005 T4 Pro Instruction Manual

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Honeywell TH4110U2005 T4 Pro

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Honeywell TH4110U2005 T4 Pro

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Honeywell TH4110U2005 Instructions

Here we offer the Honeywell TH4110U2005 T4 Pro manual completely free and in English. We have cataloged this manual in the Thermostats section on Manualverse, and it has been rated by 1 users with an average rating of 5. If you have any specific questions about Honeywell TH4110U2005 T4 Pro, we suggest checking the Frequently Asked Questions (FAQs) section of this manual.


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Honeywell TH4110U2005 T4 Pro Thermostat Specifications

Feature Specification
Temperature Setpoint Range (Heat) 40 °F to 90 °F (4.5 °C to 32.0 °C)
Temperature Setpoint Range (Cool) 50 °F to 99 °F (10.0 °C to 37.0 °C)
Operating Ambient Temperature 37 °F to 102 °F (2.8 °C to 38.9 °C)
Operating Relative Humidity 5% to 90% (non-condensing)
Physical Dimensions (H x W x D) 4-1/16” H x 4-1/16” W x 1-5/32” D (103.5 mm H x 103.5 mm W x 29 mm D)
Shipping Temperature -20 °F to 120 °F (-28.9 °C to 48.9 °C)
Electrical Rating (W - Heating) 20-30 Vac, 0.02-1.0 A Running Current
Electrical Rating (Y - Compressor Stage 1) 20-30 Vac, 0.02-1.0 A Running Current
Electrical Rating (G - Fan) 20-30 Vac, 0.02-0.5 A Running Current
Electrical Rating (O/B - Changeover) 20-30 Vac, 0.02-0.5 A Running Current
Power Options 2 AA alkaline batteries (optional for backup, required if no C-wire) or 24 VAC via C-wire
Programmability 5-2 or 5-1-1 Programmable (4 periods per day)

Honeywell TH4110U2005 T4 Pro Details

The Honeywell TH4110U2005 Thermostat, part of the T4 Pro series, offers a straightforward and efficient way to manage your home's climate. It features an intuitive user interface with dedicated buttons for Mode and Fan, alongside clear temperature adjustment controls (+/-). The crisp digital display provides essential information such as the actual time, current indoor temperature, comprehensive system status (e.g., Cool On, Heat On, Recovery, Compressor Protection), and active schedule details. Pressing any of the five buttons instantly wakes the screen, which conveniently stays lit for 45 seconds when powered by a C-wire, or 8 seconds on battery power alone, enhancing visibility during all interactions.

A cornerstone feature of the TH4110U2005 is its robust programmability. Users can effortlessly set up to four distinct time periods daily—Wake, Away, Home, and Sleep—each with customizable temperature settings for both weekdays and weekends. This thermostat supports flexible 5-2 or 5-1-1 programmable schedules, allowing for highly personalized comfort and significant potential energy savings by precisely optimizing heating and cooling cycles. The inclusion of Adaptive Intelligent Recovery further refines efficiency by "learning" your system's performance characteristics, ensuring heating or cooling activates earlier to achieve the desired temperature precisely at your scheduled time.

The TH4110U2005 provides versatile control over your HVAC system through a selection of operation modes: Heat, Cool, Auto, and Off. The "Auto" mode is particularly convenient as it automatically switches between heating and cooling as necessary to maintain your preferred indoor temperature range, eliminating manual adjustments. For air circulation, fan operation can be configured to "Auto," where it runs only when the heating or cooling system is actively operating, or set to "On" for continuous airflow, providing constant ventilation regardless of heating or cooling demand. This flexibility empowers users to finely tune their comfort settings.

To safeguard your HVAC equipment, the TH4110U2005 integrates a crucial built-in compressor protection feature. This mechanism prevents potential damage by imposing a brief, essential delay before allowing the compressor to restart after a shutdown, thereby extending its operational lifespan. For situations requiring restricted access, a robust keypad lockout function is available. This can be configured for partial lockout, enabling only temperature adjustments, or full lockout, which completely prevents unauthorized changes to settings. Such features ensure both equipment longevity and user control.

The thermostat simplifies essential upkeep with practical maintenance reminders. It provides a clear low battery warning, indicating approximately two months before depletion, and features an adjustable air filter replacement alert, which can be set based on run time or calendar days. These alerts ensure timely servicing for optimal system performance and indoor air quality. Power flexibility is another advantage, with the TH4110U2005 operating on AC power via a common (C) wire or two AA batteries. All settings are permanently stored, and time/day settings are retained if batteries are replaced within two minutes, minimizing re-configuration efforts.

Frequently Asked Questions (FAQs)

Can't find the answer you need? Here are some frequently asked questions about the Honeywell TH4110U2005 T4 Pro Thermostat, and we answer them below.


What power options does the Honeywell TH4110U2005 Thermostat support?
The thermostat can be powered by two AA alkaline batteries (required if not wired to AC power) or by 24 VAC AC power via a common (C) wire. Batteries can also serve as backup power.

How do I set the time and date on my thermostat?
Press Menu, navigate to TIME or DATE, and use the +/- buttons to adjust the hour, minutes, year, month, and date. Press Select after each adjustment to confirm.

How do I program a daily schedule for my TH4110U2005?
Press Menu, then Select for PROG. Choose your desired days or set of days, then edit the Wake, Away, Home, and Sleep periods by adjusting their start times and desired heating/cooling temperatures using the +/- buttons.

What does 'Adaptive Intelligent Recovery' mean?
Adaptive Intelligent Recovery is a feature that allows the thermostat to 'learn' how long it takes your HVAC system to reach a desired temperature. It will then activate heating or cooling earlier to ensure your home is at the setpoint exactly at your scheduled time.

Why is 'Cool On' or 'Heat On' flashing on my display?
This indicates that the built-in compressor protection feature is engaged. The system is waiting a few minutes before restarting the compressor to prevent damage. The message will stop flashing once it's safe to restart.

How do I lock or unlock the thermostat keypad?
Press Menu, navigate to LOCK, and choose OFF (unlocked), PART (partial lockout for temperature changes only), or ON (full lockout). To unlock, press the CENTER button and enter the password '1234' using the +/- buttons and Select.

My display is blank. What should I do?
First, check your circuit breaker. Ensure the power switch for your HVAC system is on and the furnace door is securely closed. If using batteries, ensure fresh AA alkaline batteries are correctly installed.

How do I change the backlight brightness?
Press Menu, navigate to LITE, and use the +/- buttons to adjust the brightness level from 1 to 5. Press Select to save. Note that continuous backlight requires the C (common) wire connection.

How do I clear an Air Filter Reminder?
When the alert icon appears, press Menu, navigate to ALRT, and press Select. You can then choose to SNZE (snooze for 7 days) or CLER (clear) the reminder. It's recommended to change the filter before clearing.

What are the available System Operation Modes?
The available modes are Auto (thermostat switches between heat/cool), Heat (heating only), Cool (cooling only), and Off (system is off). The Em. Heat mode is for TH4210U models only.

What happens if I replace the batteries? Do I lose my settings?
All your program settings are permanently stored in memory and do not require battery power. If you replace the batteries within two minutes, the time and day will also be retained, avoiding a reset.

Can I manually override the program schedule?
Yes, you can temporarily or permanently override the schedule. To temporarily override, adjust the temperature; it will hold until the next scheduled period. For a permanent hold, adjust the temperature, then press the Hold (Mode) button. Press Cancel to revert.

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