Velleman DRT1 Mode D'emploi page 7

If the device has not been installed properly, the display will show F1 or F2.
F1: The stroke is too large. Re-install the thermostat correctly and
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press BOOST/OK to launch the test mode again.
F2: The stroke is too small. The valve might be stuck/rusted and
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the stroke experiences too much resistance. Unjam the valve, re-
install the thermostat correctly and press BOOST/OK to launch the
test mode again.
If the display keeps showing F1 or F2 and you are sure the thermostat has
been installed correctly, hold FUN pressed to overrule the test mode.
8. Operation
8.1 Setting the Temperature
The thermostat has several temperature modes:
In normal display mode, press PROG to enter the selection mode. The first
comf mode will flash on the display. Press BOOST/OK to enter the mode and
set the desired temperature using the setting dial. Confirm with BOOST/OK.
Set the temperature for comf mode 2, eco mode 1 and 2.
Confirm with BOOST/OK and enter the programming mode.
8.2 Setting the Programme
Programming your thermostat will happen in groups. These groups are:
Monday  Sunday, Monday  Friday, Saturday  Sunday,
Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday
Each group can accept up to seven switching points (transition points
between different temperature settings).
After the temperature setting is finished, the thermostat will enter the
programming mode. If the thermostat is not in programming mode, press
PROG and BOOST/OK until the display show PROG.
V. 01 – 22/06/2016
comf mode
DRT1
7
eco mode
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