Operation; On/Off Switch; Heating Or Cooling Control - Honeywell thr840duk User Manual

Operation

On/off switch and frost protection
25.
°
c
0
Press and hold
to turn on or off
5.
°
c
0
System maintains Symbol appears when
minimum thermostat is off
temperature when
thermostat is off
This Manual: http://www.manuallib.com/file/2598268
Press the ON/OFF button as shown at left to turn the thermostat on
or off. When off, the thermostat will never activate the cooling system,
and will activate heating only if necessary to maintain a minimum
indoor temperature of 5º C (frost protection).
You can change the frost protection temperature to any level between
5º and 16º C, or turn this feature off so the heating system is never
activated when the thermostat is off (see page 22).
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Heating or cooling control

The thermostat is pre-set to control only your heating system. If
Press and hold both buttons for 5 seconds
installed and set up correctly, it can also be used to control your
cooling system.
25.
To switch between heating and cooling, press and hold the p and q
°
c
buttons together until the screen changes.
0
NOTE: The thermostat will not switch to cooling control unless you
enable this feature (see page 22).
Heating changes to cooling
NOTE: When you change the system, the "Heating" and "Cooling"
symbols will appear for a few seconds, then disappear. Normally, these
symbols appear only when the heating or cooling system is running.
25.
°
c
0
homexpert by Honeywell THR840DUK Digital Thermostat
tm
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