3
Operation
3.1
Buttons and sym-
bols (Figure 1, on
page 102)
Buttons:
a
Menu button
: Select heating mode button
b
(Press to select
c
: Change settings
-Press and release to change settings by
one unit
-Press and hold to change settings con-
tinuously
d
: Advance button (press to switch
/
(available during auto/
e
: Change settings
-Press and release to change settings by
one unit
-Press and hold to change settings con-
tinuously
Symbols on the timer:
Operating modes
Heating / hot water constantly off
auto
Automatic operation (all timed periods
active for heating / hot water)
Heating / hot water on from first timed
period to last timed period of the day
Heating / hot water constantly on
LED on = heating / hot water on
LED off = heating / hot water off
Function
Clock settings
Timed periods
Date setting
Holiday function
DT 20 only
Heating channel
Hot water channel
6 720 611 791 (2007/05)
/auto/
/
)
))
Symbols on the display:
Weekday (1 = Monday...
1...7
7 = Sunday)
Program the switch-off point
Program the switch-on point
Heating channel (DT 20 only)
Hot water channel (DT 20 only)
3.2
Programming
For base setting see page 105; to
restore the factory settings:
Press
and
B
together.
The set time and date remain
unchanged.
To exit settings:
Press
repeatedly or do not
B
press any button for approx.
60 seconds.
3.2.1
Setting the clock and
date
Clock:
Press
until the bar in the dis-
B
play shows above the
Press
and the hours flash in
B
the display: set the hour with
.
DT 10/DT 20
buttons
symbol.
/
13