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Installation and Setup
20
homexpert
tm
by Honeywell THR842DUK Wireless Digital Thermostat
21
System test
After installation, you should check to make sure the system is
working properly.
1 Check the power supply to make sure the system is on and the
green light on the relay box is off.
2 Press the p button to raise target temperature to maximum
(35°C).
If the system is set up properly, the “heating” symbol should
appear on the thermostat display, the heating system should
begin running, and the green light on the relay box should be on.
3 To stop the test, press the q button to lower the target
temperature to an appropriate level. The heating system should
turn off and the “heating” symbol on the thermostat screen should
disappear.
Set temperature to maximum
Installer setup
Installer settings allow you to customise how your system
works. Check the tables on pages 22-24 to see if any settings
need to be changed.
To change installer settings:
1 Press and hold the ON/OFF button for 5 seconds.
2 Press and hold the p and q buttons together until the
screen changes.
3 Press the p or q buttons to scroll through functions
quickly until you find one you want to change (see list on
pages 22-23).
4 To change any setting, press the ON/OFF button, then
press the p or q buttons until the correct value is flashing.
5 Press OFF again to save your choice, then use the p or q
buttons to select another function.
To exit installer setup, press and hold the ON/OFF button
for 5 seconds.
35.0
°
c
35.0
°
c
Heat should turn on
25.0
°
c
i0se
0e: 1
Press and hold both buttons for 5 seconds
Function Setting
11


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