Honeywell
user manual
THR840DUK Digital Thermostat
Install
Wiring diagrams
Warranty
Temperature control
What is
Page 1
User Manual
THR840DUK Digital Thermostat
50051982-001
Rev. A
Page 1
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Contents
THR840DUK Digital Thermostat
Contents
An explanation for householders
What is a room thermostat?
About your new thermostat
Install and set up thermostat
Quick reference
25.0 C
On/off switch and frost protection
Heating or cooling control
Energy-saving ECO mode
Temperature control
24.0 C
Wall bracket installation
System installation
Wiring diagrams
Connect system wiring
Make sure electrical power is off
Basic boiler Combi boiler
Wiring diagrams
Activate batteries and mount thermostat
35.0 C
System test
Installer setup functions
Installer setup
To change installer settings
Function Description Setting Options
Your heating system Changes required Setting Options
Customised settings for your system
Your cooling system Changes required Setting Options
Case of difficulty
Description of functions
Disposal and recycling
Limited Warranty
Disposal and recycling
Please retain these instructions for future reference
Need Help?
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