Honeywell T4H110A1021 T4 7 Day Programmable Thermostat, 230 V, White

Product Information

Identify any wires labeled R, RH, or RC. You typically have one or two of those three. If you have one wire — even if it’s labeled RC — it goes into the R terminal, setting the jumper connecting terminals R and RC in place. Thermostats may have a jumper switch, metal staple, or plug. The jumper may also be a wire connecting the two terminals. If you have two wires, R or RH go into the R terminal and RC into the RC terminal. If you have more than one wire (for example, you have a wire labeled R and another wire labeled Rc), remove any jumpers between the R and Rc terminals or push the switch to open the RC terminal to insert a wire. If your O or B terminal shares a label with another wire — typically W —identify whether you have a heat pump system or not. A heat pump runs your compressor for both heating and cooling. If you don’t know your system type, place this wire in the W terminal. If you have a heat pump system, put it in the O/B terminal. If you see wires connected to terminals labeled G1 G2 G3, you need a thermostat capable of controlling multiple fan speeds; none of our retail thermostats are compatible with this system type. G is compatible, but not G1, G2, or G3. Referring to your photo, remove and label each wire. If a terminal has multiple designations like W and O/B, it will be labeled as W and O/B and not just one or the other. Honeywell HomeT4 is designed to provide automatic time and temperature control of domestic systems. It is compatible with 24 V to 230 V on or off appliances such as gas boilers, combi-boilers and zone valves and can be used as a temperature sensing device in an S or Y Plan system. It is well suited to control combination boiler installations or additional zones in an S Plan Plus system.

Works with the optional RedLINK® Internet Gateway, Portable Comfort Control and Wireless Outdoor Sensor You should typically see an 18-gauge solid core wire. The most common configuration is five wires. However, you could see as few as two and many as ten. The T4R has automatic summer and winter time changes for all-year efficient control and a standby mode with frost protection for added peace of mind. It is also Suitable for Sundial S and Y Plan systems or for additional zones in an S Plan Plus system. A room thermostat controls the heating in your home. If the room's temperature drops below your chosen temperature, the thermostat will switch on. Once the room has reached the chosen temperature, the thermostat will turn the heating off, preventing overheating and reducing energy consumption. This can help reduce your home's energy consumption. After removing and labeling all wires, unscrew the old thermostat wall plate and mount the new thermostat’s wallOn screen text display and function buttons to ensure simplified programming and operation for all users There is no standard for which color wire controls each function. When wiring, each wire should be identified by what terminal(s) it connects to — never by color. If you don’t know to which terminal each wire connects, it may be necessary to go to the HVAC system and look at the designations on the control board. Consult your owners/install guide for wiring examples and systems compatible with your thermostat*. Locate any unconnected wire labeled W or W1. If you identified an O, B, or O/B wire connecting to the O/B terminal in the previous step and it has a separate W wire, place it into the W2 terminal. Connect the W wire to the W terminal if you don’t have a wire connected to the O/B terminal. Next, let’s talk about the C or common wire. If you have a Trane model thermostat and a wire labeled X or B, refer to your thermostat manual. In some cases, one of those wires is your common. If you have a C wire, place it into the C terminal on your wall plate. C wire adapters are available here. Honeywell T4R (Y4H910RF4003) is a wireless battery operated thermostat with optional OpenTherm control via the wireless receiver box, offering easy switch-over from an existing wireless receiver box. Designed for domestic and light commercial properties, the T4 Series of programmable thermostats simplifies temperature scheduling, offering a level of usability and automated control your customers now expect from today’s technology. With standardised fittings and wiring, the T4 Series also simplifies the installation process.

The thermostat uses one wire to control the primary functions of your HVAC system, such as heating, cooling, and fan. See the diagram below for the role of each wire in your system: We are currently using Royal Mail Parcelforce and DPD as our delivery providers, all small items will be delivered by Royal Mail, these can take up to three working days to reach you. The T4 Series uses standard thermostat fittings and connections, offering installers an easy, inexpensive choice when it comes to replacing an old thermostat. After fitting, T4 Series thermostats are ready to use!Your new thermostat may not be directly compatible if you see terminals labeled A B C, or 1 2 3, as your system requires a communicating thermostat.

To protect your equipment, turn off the power at the breaker box or switch that controls your heating and cooling. To confirm your system is off, change the temperature on your existing thermostat, so the system starts heating or cooling. If you don’t hear or feel the system turn on within 5 minutes, the power is off. You can skip this step if you have a digital thermostat with a blank display. Well suited to control combination boiler installations or additional zones in an S Plan Plus system Compatible with 24 V to 230 V on or off appliances such as gas boilers combi boilers and zone valvesHoneywell HomeT4 wired adjustable programmable thermostat uses standard thermostat fittings and connections, offering installers an easy, inexpensive choice when it comes to replacing an old thermostat. T4 wired thermostat brings effortless temperature control by simplifying temperature scheduling through automation and user-friendly features. It maximises energy efficiency through automated scheduling and streamlines the installation process by offering standardised fitting, plus it works with any system and any boiler.