Honeywell T4 Thermostat Programmable**boiler+ Compliant Heating- & - Boilers

The T4 programmable thermostat is a modern a wired 7-day Programmable Room Thermostat. It is designed to provide automatic time and temperature control of domestic systems in domestic or light commercial premises.

Features

• Compatible with 24-230V on/off appliances such as gas boilers, combi-boilers and zone valves

• The T4 can be used as a temperature sensing device in an S or Y Plan system
• Well suited to control combination boiler installations or additional zones in an S Plan Plus system
• On screen text display and function buttons to ensure simplified programming and operation for all users
• Energy saving TPI control
• Optimum stop, start & delayed start features that learn how the room is heated
• Two wire, volt free connections are ideal for use with combination boilers
• Easy to fit with a three step installation process:  Wire, Power Up and Test, Configure
• New improved wall plate with extra wiring space
• Clip on cover to the fixed wall plate
• Optional Wired external sensor available (wired versions only)
• On screen heat demand icon makes start up testing easy
• Simple push button access to configuration menus
• Adjustable Frost protection
• Away mode with specific temperature set (number of days changeable)
• Temporary schedule override until next set point or for 1 or 2 hours
• Schedule can be turned off – will operate as a variable setting thermostat only
• Continuous time, displayed in extra-large LCD
• Automatic Summer/Winter time change
• 7-day programming with 7 day; 5/2 or single day schedules
• Four or six independent time & temperature settings (default is 4)
• Pre-configured 5/2 heating schedule
• Battery powered (with low-power indicator)
• Easy change battery compartment
• Optional backlight with extended light on time period
• Burner 'ON' symbol