Honeywell T4 User Manual

3
Contents
Thermostat Interface .....................................................................................4
Status Icons .........................................................................................4
Menu & Navigation Icons .............................................................5
Navigating the menu ...................................................................... 5
Menu ................................................................................................................ 6
Heating Schedule .......................................................................6
Clock ..................................................................................................8
Date ....................................................................................................8
Keypad lock ....................................................................................8
Optimisation .................................................................................. 9
OpenTherm® boiler alerts (T4M only) ............................10
Standby mode..........................................................................................10
Away mode .................................................................................................10
Schedule Override ........................................................................................11
Temporary Override ............................................................. 11
Timed Override ...................................................................... 11
Turn Schedule Off ..................................................................... 11
Changing the Batteries (T4 & T4R only) .......................................... 12
Wireless Receiver Box (T4R only) ......................................................... 13
Troubleshooting ............................................................................................ 14

Honeywell T4 Specifications

General

Temperature Range	40°F to 90°F (4.5°C to 32°C)
Fan Modes	Auto, On
Wi-Fi Capable	No
Touchscreen	No
Energy Star Certified	No
Display	Digital
Programming	7-day programmable
Power Source	Battery or Hardwired
Stages	1 Heat/1 Cool
Operating Modes	Heat, Cool, Off