Honeywell DT90E Manual To The Use

GUIDE TO THE USE OF THE DT90E ROOM THERMOSTAT
The purpose of this device is to control the temperature
of the HEATING when the timer allows it to be switched
on.
The hot water will not be affected in any way.
Normal operation of the thermostat
*
Normal Display
The display will normally show the room temperature
measured by the thermostat.
If the flame symbol is visible*, this means that the boiler
should be on.
To enquire about the set temperature
Simply press one of the arrow buttons and the display
will show the set temperature. After a few seconds it
will go back to showing the room temperature.
To change the set temperature
Keep pressing the arrow buttons and the display will
change to show the new set temperature.
Press the button to increase the temperature, and
the ▼ button to decrease the temperature.
To switch on or off
Press and hold the button marked
for 2 seconds to switch off.
In the bottom right corner display will show this symbol.
To switch the thermostat back on, press and hold the
same button again for 2 seconds. The symbol in the
bottom right hand corner will disappear.