Quick Start Guide; Quick Reference To Controls - homexpert THR842DUK User Manual

User Manual
About your new wireless thermostat
The THR842DUK is an easy-to-use thermostat designed to maintain a comfortable environment when you
are at home and reduce energy costs when you are away. One touch of the ECO button overrides the normal
temperature to maintain a lower, energy-saving level for a specified period of time (see page 11).

QUICK START GUIDE

Your new thermostat is pre-programmed and ready to go. Just check the steps below and change
settings if needed:
1 Install and set up thermostat & relay box
(if this has not been done by a professional installer) .......................................................... See pages 12-25
2 Select heating (default) or cooling mode ..................................................................................... See page 9
3 Set desired indoor temperature ................................................................................................ See page 10
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Quick reference
Cooling system is ECO mode countdown
running (see page 9) (see page 11)
ECO mode is on
(see page 11)
eco
25.
Indicates display
is showing target
temperature
Current temperature
(or target temperature
when flashing)
System fault Low battery warning
(see page 27) (see page 16 to replace
batteries)
homexpert by Honeywell THR842DUK Wireless Digital Thermostat
tm
Heating system is Press to change
running (see page 9) temperature
(see page 10)
Press to turn ECO mode
on or off (see page 11)
°
c
Press to turn thermostat
0
on or off (see page 8)
Wireless signal Standby symbol appears
indicator (see when thermostat is off
page 26) (see page 8)
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