B2812en 4 319 2285 0 g 07.05.2013
PROG
SET
End
Start Heating period 2
End
Start Heating period 3
Nominal temperature
Reduced temperature
Seven-day block
End
Start Heating period 1
°C
°C
1-7
1...7Individual day
Operating Instructions
QAW20
Operating elements
°C
AUTO
2312Z02
5
1
3
2
4
6
7
8
9
1 Display
2 Display presence button
3 Info button
4 Operating mode button
automatic mode
5 Operating mode button
manual operation
6 Operating mode button
standby
7 Cover
8 Temperature setting knob
9 Presence button
Display
9
2812Z01
0 4 8 12 16 20 24
15
13
1011
12
14
12
3
6
7
854
1 Digital display, clock
2 Units
3 Time bar heating program
4 Central setback
5 Display presence button
6 Outside temperature
7 Room temperature
8 Airing detection
9 Holiday function
10 Operating mode
11 Meter or program line
12 Heat cost allocator
13 Water meter
14 Gas meter
15 Electricity meter
Operation
During operation, the unit cover must be closed!
Selecting the operating mode
2812Z10
AUTO
Press the required operating mode button.
The display will show your choice as
.
Automatic mode
The heating system operates automatically according to the
selected heating program. The program can be temporarily
overridden by pressing the presence button.
Manual operation
The heating system is operated manually, depending on the
choice made with the presence button.
Standby
The room unit is switched off, but d.h.w. heating and frost pro-
tection are ensured.
Info button
2812Z11
AUTO
Every time the Info button is pressed, the
values listed below will be displayed in suc-
cessive order.
The room unit continues to operate, inde-
pendent of the selected display.
Time of day, room temperature
Weekday, time of day
Outside temperature *
%
Heat consumption trend
Heat consumption of the current day compared to that of
the previous day at the same full hour. On the first heating
day of each heating season, the display will show
200 %.
Current meter readings:
Heating costs
Domestic hot water *
Gas *
Electricity *
Other meters *
* Display only if the relevant meters or sensors are connected.
Do not mix up current meter readings with set day values!
Temperature readjustments
°C
If the temperature in your apartment is too high or too low, you
can readjust the nominal room temperature by turning the set-
ting knob.
Turning the knob in the direction + increases the nominal
room temperature by about 1 °C per graduation.
Turning the knob in the direction – decreases the nominal
room temperature by about 1 °C per graduation.
Before making further readjustments, wait some time, allowing the
room temperature to adapt.
With the temperature setting knob, you only readjust the nominal room
temperature. The reduced room temperature remains unchanged.
Presence button
If you do not use your rooms for longer periods of time, you can reduce
the room temperature by pressing the presence button, thus saving heat-
ing energy. When your rooms are occupied again, press the presence but-
ton again to provide heating.
The choice made is shown on the display:
Heating to the nominal temperature = rooms occupied
Heating to the reduced temperature = rooms unoccupied
Central temperature setback through the central unit
The choice made is
continuously active in manual operation,
active in the automatic mode only to the next switching action of
the heating program.
B2812en 4 319 2285 0 g 07.05.2013
Programming
To program the room unit, the unit cover must be open!
As soon as the cover is opened, the display and the button function will
change. The framed number indicates the program line that can be se-
lected with the arrow buttons and .
2812Z13
1 2
34
1 Line number
2 Value
3 Changing values
4 Selecting line numbers
You can set or display the following values:
• Temperatures to
• Heating program to
• Weekday and clock to
• Set day values
• Holiday period
• Resetting to the default values
Setting the temperatures
In the automatic mode, the room unit switches between the nominal and
the reduced room temperature according to the heating program.
In manual operation, the temperatures are switched by pressing the pres-
ence button.
Nominal temperature:
Room temperature during room occupancy times (basic
setting).
Reduced temperature:
Room temperature during absence or in the night
Heating program
With the heating program, the temperature changeover times can be pre-
determined for one week.
The seven-day program consists of a seven-day block (1-7) in which every
day uses the same 24-hour program, or single days (1…7) with seven in-
dividual 24-hour programs (1 = Monday…7 = Sunday). Each 24-hour pro-
gram offers three heating periods each of which is defined by a start and
an end time.
If you do not use a heating period, let the start and the end times coincide.
04812
16 20 24
1
2273Z07
3
2
Select the respective day for the heating period. You have the
choice of the seven-day block (1-7) and of individual days (1…7)
(1 = Monday… 7 = Sunday)
Start of period 1: Heating to the nominal temperature
End of period 1: Heating to the reduced temperature
Start of period 2: Heating to the nominal temperature
End of period 2: Heating to the reduced temperature
Start of period 3: Heating to the nominal temperature
End of period 3: Heating to the reduced temperature
Setting the time of day
For setting the current weekday
(1 = Monday…7 = Sunday)
For setting the current minute
Press buttons and , to set the current time of day. Continuous
pressing accelerates the display.
If a central unit is used, the room unit’s clock will be synchronized with
the system’s clock and the setting on the room unit locked (display
OFF).
Set day values
Display of the set day values of all connected meters
Press buttons and , to select the required meter, which the
display shows as a symbol.
The set day (billing day) is entered by the heating engineer. On that day,
the system updates the set day values.
Holiday function
For entering the number of days during which you will be absent.
The holiday function will be activated by closing the unit cover.
The display shows the holiday symbol , the symbol for standby
, the day of switching on, on the left (1 = Monday…
7 = Sunday) and the number of days of the holiday period.
During the holiday period, the room unit is in the standby mode
On completion of the number of days entered, the room unit will
switch to the automatic mode
The holiday function can be cancelled by pressing any of the holiday mode
buttons.
Default values
To retrieve the default values, press buttons and si-
multaneously for at least 3 seconds. As a confirmation, the display
will show ¦.
Caution:
In that case, the following line numbers that have previously been en-
tered will be lost:
• Temperature and time program to
• Duration of the holiday period
Detection of airing
In operating mode , the room unit detects airing if the room temperature
falls suddenly.
In that case, the heating will temporarily be switched to standby and
symbol appears.
The room unit returns to operating mode when:
• The room temperature rises again
• The operating mode changes
• 45 minutes have elapsed
Central unit
If a central unit is used, the room unit may be affected in the following way:
• Limitation of settings
• Central night setback
• Clock setting locked
Status displays
Display:
2312Z21
• Clock setting locked, time of day centrally
preset
• Programming lock active (to be set by the
heating engineer)
Display:
2312Z22
• Room unit faulty
Display:
2312Z23
• External contact active. Do not press operat-
ing mode and presence button
-
1
-
2
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