Key Features

• Compatible with 24-230V on/off appliances such as gas boilers, combi-boilers and zone valve
• 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
• Wireless communication between thermostat and receiver box with 30m range
• Pre-bound to the wireless relay box, no need to establish a binding
• Battery powered (with low-power indicator)
• Easy change battery compartment
• Optional backlight with extended light on time period
• Burner 'ON' symbol
• Warranty: 1 year

Honeywell T4R Wireless Programmable Thermostat - Y4H910RF4003 Overview

This is a modern wireless 7-day Programmable Room Thermostat. It's designed to provide automatic time and temperature control of domestic systems in domestic or light commercial premises

Additional Features

• On screen text display and function buttons to ensure simplified programming and operation for all users
• Energy saving TPI control
• Optimum stop & 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
• 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
• Displayed on an extra-large LCD screen
• 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

Choosing the right sort of Heating Control is a key decision. After you determine that Programmable Thermostats provide the appropriate solution then the Honeywell T4R 7-Day Wireless Programmable Thermostat - Y4H910RF4003 is clearly worth putting on your shortlist.