Honeywell T4 Pro User manual

T4 Pro
Programmable
Thermostat
User Guide

● Country Of Origin: United States
● Model Number: TH4110U2005/U
● Item Package Dimension: 6.49999999337" L x 5.099999994798" W x 2.299999997654" H
● Item Package Weight: 13.8 oz
● More fuel-efficient aircraft. More direct and on-time flights. Safer skies and airports. We're
found on virtually every commercial, defense and space aircraft.
● Over 100 years ago, we defined energy efficiency by making indoor comfort automatic.
About this item

● Today, we redefine it in 10 million buildings using our technology.
● We pioneered automation control so we understand complex industrial facilities and how to
create high-quality and high-performance chemicals and materials.
● Each year, we keep over half a billion workers safer and more productive with voice-enabled
software, barcode scanners, mobile computers and protective equipment.
Simple Control with Smart Learning
Easy to install and intuitive to use, the T4 Pro Programmable Thermostat learns how long it takes your
system to reach the desired temperature and activates the system earlier to help you feel comfortable
sooner.

DESCRIPTION
Easy to install and intuitive to use, the T4 Pro Programmable Thermostat learns how long it takes
your system to reach the desired temperature and activates the system earlier to help you feel
comfortable sooner.
Part of the Honeywell Home T Series of thermostats from Resideo, the T4 Pro Programmable
Thermostat helps you manage your home heating and cooling in a simple, easy to use device.
Designed to streamline everything from installation to user experience, the T4 features push button
control and seven-day scheduling, including an option to set a different schedule on weekends.
With its adaptive intelligent recovery, the T4 helps you feel comfortable sooner by learning how
long it takes your system to reach a desired temperature and activating the system earlier.
The T4 Pro Programmable Thermostat is easy to install with on-screen menus to display
installation steps and a universal mounting system. It's even easier to use with simple push button
controls, allowing you to adjust the temperature or set a heating and cooling schedule.

Over time, the T4 Pro Programmable Thermostat learns how long it takes your system to reach the
temperature you want. It turns on the heating or cooling system earlier to make sure you're
comfortable at the time you expect.
It takes work to manage your daily schedule, but with the T4 Pro Programmable Thermostat, your
home temperature is one thing you can set and forget. Program a seven-day schedule or set different
schedules on the weekend so you can always be comfortable whether you're awake or asleep, home
or away.
Low Voltage Thermostat, Stages Heat 1, Stages Cool 1, Temp. Settings per Day 4, 2, 1, 0, Programs
per Week 7, 5-2, 5-1-1 or Nonprogrammable, Terminal Designations RC, R, C, W, W2, AUX, Y, Y2,
O/B, G, K, E, U, U, L/A, S, S, Wi-Fi Capability No, System Switching Yes, Fan Switching Yes, Display
Size 5.44 sq. in., Display Type Backlit, Display Color Blue, Key Pad Lockout No, Programmable Fan
Yes, Automatic Changeover Yes, Humidification Control No, Dehumidification Control No'

Package Includes
● T4 Pro Thermostat
● UWP™ Mounting System
● Decorative Cover Plate
● Screws and Anchors
● 2 AA Batteries
● Thermostat Literature

Read before installing Thermostat controls
The screen will wake up by pressing any of the five buttons. If powered by the C wire, the screen stays
lit for 45 seconds after you complete changes. If powered by battery only, the screen stays lit for 8
seconds. Depending on how your thermostat was installed, the screen light may always be on.

System operation settings
● Press the Mode button to cycle to the next available System mode.
● Cycle through the modes until the required System mode is displayed and leave it to activate.
NOTE: Available System modes vary by model and system settings.
● System modes:
○ Auto
○ Heat
○ Cool
○ Off
○ Em. Heat (TH4210U only)

Battery replacement
When the low battery warning appears, press gently to loosen the thermostat and then carefully pull it
from the wall mount.

Batteries are optional (to provide backup power) if your thermostat was wired to run on AC power
when installed. If your thermostat was not wired to run on AC power, then batteries are required.
Install fresh batteries immediately when the low battery icon appears. The icon appears about two
months before the batteries are depleted. Even if the low battery icon does not appear, you should
replace batteries once a year, or before leaving home for more than a month. If batteries are
inserted within two minutes, the time and day will not have to be reset. All other settings are
permanently stored in memory and do not require battery power.
NOTE: When replacing batteries, alkaline batteries are recommended.

Alerts
If there is an alert or reminder, the alert icon appears on the Home screen.

Low Battery Warning
1. The batteries need to be replaced when
BATT, the alert icon , and the battery icon
are displayed on the Home screen.
2. When the battery power is very low, the
thermostat backlight is disabled to save
battery power.
3. When battery power is critically low, only
BATT, the alert icon , and the battery icon are
displayed.

SPECIFICATIONS
●Product Name: Honeywell Home TH4110U2005 T4 Pro Programmable Thermostat
●Package Contents: T4 Pro Thermostat, UWP™ Mounting System, Decorative Cover Plate,
Screws and Anchors, 2 AA Batteries, Thermostat Literature
●System Operation Settings: Auto, Heat, Cool, Off, Em. Heat (TH4210U only)
●Fan Operation Settings Auto: Fan runs only when the heating or cooling system is on.
●On: Fan is always on.
●Program Schedule: Four time periods each day, with different settings for weekdays and
weekends. Wake, Away, Home, Sleep.

●Keypad Lockout: Off, Part, On
●Adaptive Intelligent Recovery: Thermostat “learns” how long it takes your system to reach
the temperature you want and turns on the heating or cooling system earlier to make sure you’re
comfortable at the time you expect.
●Built-in Compressor Protection: Forces the compressor to wait for a few minutes before
restarting to prevent damage.
●Battery Replacement:Alkaline batteries are recommended. Low battery warning appears when
batteries need to be replaced.
●Alerts : Low Battery Warning, Air Filter Reminder
●Troubleshooting: Display is blank, Heating or cooling system does not respond

●Q: How long does the screen stay lit after making changes to the thermostat?
A: If powered by the C wire, the screen stays lit for 45 seconds. If powered by battery only, the screen stays lit
for 8 seconds.
●Q: How do I cycle through the available system modes?
A: Press the Mode button to cycle through the available system modes.
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●Q: How do I set the time and date on the thermostat?
A: Press Menu, then press + to go to TIME. Use + or - to choose between 12 or 24-hour format, then adjust the
hour and minutes.

●Q: How do I adjust the program schedule on the thermostat?
A: Press Menu, then select PROG. Press + or - to select the day or set of days to edit, then select a schedule
period (Wake, Away, Home, Sleep). Adjust the start time and temperature for each period.
●Q: How do I temporarily override the program schedule?
A: Press + or - to adjust the temperature. The new setpoint temperature will be held until the next scheduled
time period begins.
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●Q: How do I permanently override the program schedule?
A: Press + or - to adjust the temperature, then press the Hold (Mode) button to change to Permanent Hold.

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