Replace with 2 new 1.5V LR6 AA Alkaline batteries only – which should last approximately 2 years depending on Thermostat use The T3 has been designed from top to bottom to satisfy the needs of installers; specifiers; property owners and end users.

The T3R also allows you to set up to 4 independent schedules, meaning users can customize them according to their lifestyle. The temperature settings can range between 5 and 35 degrees Celsius, providing consistent warmth throughout one's living spaces. The Frost protection feature protects pipes from freezing, and the thermostat offers the potential of being set at various temperatures at different times, offering the user optimal control. Your Thermostat has optimization functions that aim to save energy while maintaining suitable comfort levels. The Thermostat displays during the optimization period if set. By default optimization is disabled, see instructions on the installation guide on how to activate it. The T3 Series of programmable thermostats provide sophisticated automatic control of domestic heating systems. They have been developed to provide intuitive heating time and temperature control with a wealth of features that will make the T3 the first choice in a wide variety of installations, including social housing, new construction and mass installation situations. Optimum Stop saves energy by switching off a little bit earlier than the programmed time. If your home is up to temperature, you will not notice the effect on the temperature, but you should see a difference in your fuel bill.The T3 provides a whole host of energy efficiency measures. A full suite of Optimisation features (Optimum start, Stop and Delayed Start) plus adaptive ‘fuzzy logic’ protocols provide full control of the boiler.

is displayed on the Thermostat when the wireless signal is good – The receiver box LED will be solid GREEN. will flash on the Thermostat when the wireless signal is lost – The Receiver Box LED will flash RED. Repeat these steps to make adjustments to the remaining periods and days – or press to save changes and return to the home screen. Your Thermostat comes with the following default schedule. Follow the next steps to adjust heating schedule. Other features of benefit to property owners are Automatic Summer & Winter time change, battery low indicators, service timers, fail safe mode and one model covering 5/2 and 7day programming with 4 time periods a day.Honeywell Home T3 wired programmable thermostat is providing intuitive time and temperature control, the Honeywell T3 wired programmable thermostat is suitable for use in domestic heating systems, in social housing, new construction and mass installation situations. Compatible with a wide range of boilers and systems including 24 V to 230 V on or off, such as gas and oil boilers, combi-boilers and heat pumps, T3 offers OpenTherm control but are not suitable to control electric heating.