24
AW HT
GB 05/2009
OPERATION AND FUNCTIONS OF THE ROOM UNIT USING THE BUTTONS
A
Select heating operating modes
Repeatedly pressing button 1 selects the
different heating operating modes:
Automatic heating mode
Automatic operation controls the room tem-
perature based on the set time program.
Characteristics of automatic opera-
tion:
• Characteristics of automatic opera-
tion:
• Heating mode based on the time program.
• Temperature set point according to the “Comfort set point”
or “Reduced set point” program
• Protection functions active.
• Summer / winter switching (ECO functions) and 24 hour
heating limit not active.
Continuous operation
or
Continuous operation keeps the
room temperature constant at the
selected level.
Characteristics of continuous operation:
• Heating without considering the time program.
• Protection functions active.
• Summer / winter switching (ECO functions) and 24 hour
heating limit not active, for continuous operation with Com-
fort set point.
Protection mode
In Protection mode, the heating sys-
tem is not active.
However the frost protection function
is guaranteed (frost protection temperature), as long as the
power supply is connected.
On the display the operating mode is indicated by a line
under the corresponding symbol.
Select domestic hot water mode (DHW)
Operating mode only available only if the
three way selector valve is installed as an
accessory outside of the unit.
Pressing button 3
starts and stops
domestic hot water production.
DHW mode
• Active (indicator shown under the
symbol) Domestic
water is heated based on the selected operating program.
• Not active (no indicator shown under the
symbol). No
domestic water is heated; the frost protection function is
active.
Push DHW
This is activated by pressing the DHW mode button
for
at least three seconds.
This manually activates the production of domestic hot
water only. Activating this function starts the heat pump in
DHW mode until reaching the DHW set point, and cannot be
deactivated.
Room temperature control
Knob 4 is used to control the desired room
temperature.
Temperature correction in Heating mode:
For the
Comfort set point
select the
temperature value by turning the knob and
confirming by pressing OK.
For the
Reduced set poin
t
• Press OK.
• Select the “Heating circuit” page
• Set the “Reduced set point” parameter 712.
After having made the settings, wait at least 2 hours to allow
the desired room temperature to be reached.
Occupancy button (extended absence)
If the rooms are not used for long periods,
the room temperature can be reduced by
pressing the occupancy button 5, thus sav-
ing energy.
When the rooms are used again, pressing
the pressing the occupancy button 5 returns
the room temperature to the set value.
• The occupancy button is only enabled in automatic opera-
tion.
• The setting remains active until the heating program is
next changed.
Information button
The information button 6 displays different
types of information, as described in this
manual, such as temperature, heat pump
operating status and errors.
In exceptional situations, the display shows the following
symbols:
Error warning
This symbol indicates an error in the system.
Press the information button and read the additional infor-
mation shown on the display. Follow the instructions
described in the paragraph “Maintenance and Service”.
Maintenance warning
This symbol indicates the need for maintenance or a special
operating mode.
Press the information button and read the additional infor-
mation shown on the display.
Follow the instructions described in the paragraph “Mainte-
nance and Service”.
1
4
5
6
3
Operating mode
indication
Operating mode
indication
Operating mode
indication
Operating mode
indication
Heating to daytime room tem-
perature setting
Heating to reduced room tem-
perature setting
