4
WARNING Injury
The appliance may be used by children over 8 years of
age and persons with reduced physical, sensory or men-
tal capabilities or a lack of experience and expertise,
provided that they are supervised or they have been
instructed on how to use the appliance safely and have
understood the potential risks. Children must never play
with the appliance. Children must never clean the ap-
pliance or perform user maintenance unless they are
supervised.
Note
Do not change any system-specific settings at the con-
trol unit. Your qualified contractor has set the control
unit to match the local conditions for your building and
your individual requirements. The system-specific para-
meters are protected by a code to prevent unintentional
modifications.
The parameters that serve to adapt the appliance to your
personal requirements are not protected by a code.
Appliances with ventilation function
WARNING Injury
If there is a radio or police announcement ordering win-
dows and doors to be kept closed, simply select fan stage
"0" (= fan off) for several hours.
The programming unit must be activated if the appliance
has been out of operation for a long time:
Hold down "MENU" button for three seconds.
If you have already navigated through the menu
tree, pressing MENU will return you to the default
display. If necessary you may have to press menu
several times.
Slide your finger along the scroll wheel until you
reach the "VENTILATION STAGES" entry.
Press "OK".
Press "OK" again to adjust the "Unscheduled vent."
parameter.
Set the "UNSCHEDULED VENT." parameter to 0 by sli-
ding your finger anti-clockwise over the scroll wheel.
Confirm with "OK".
Set the "UNSCHED. VENT TIME STAGE0" parameter
to a suitable value.
Never adjust the setting of supply and extract air valves inside the
rooms. These have been adjusted during commissioning.
2.3 Test symbols
See type plate on the appliance.
3. Appliance description
When there is a heat demand, outdoor air is channelled through
the evaporator and its energy extracted. This energy is boosted
to a higher temperature level by means of the heat pump, to heat
the DHW and the heating system.
When the temperature is very low, or when there is a very high
heat demand, the appliance covers the residual heat demand by
means of an integral electric emergency/booster heater. With a
mono mode design, the electric emergency/booster heater is acti-
vated for emergency heating if the temperature reading falls below
the standard outside temperature, set as the dual mode point.
This ensures heating operation and the provision of high DHW
temperatures. In mono energetic mode, the electric emergency/
booster heater is activated as a booster heater.
The appliance is controlled by a weather-compensated control
unit.
Appliances with ventilation function
Heat is recovered from the extract air via a highly efficient
cross-countercurrent heat exchanger. The cooled air is discharged
outdoors as exhaust air.
Appliances with solar heat exchanger
An additional heat exchanger is included in the common return to
the heat pump. The thermal solar collectors connected can back
up both DHW heating and room heating. A differential tempera-
ture controller for the solar thermal system is integrated in the
appliance control unit.
A heat exchanger built into the outdoor air flow heats the outdoor
air for domestic ventilation. If sufficient solar heat is available, the
outside air is preheated indirectly by solar energy.
Appliances with cooling function
The refrigeration unit of the heat pump may be reversed. In co-
oling mode, heat can then be extracted from the heating circuit
and transferred to the outdoor air.
Inverter
The compressor in the appliance has an electronic speed cont-
roller. The compressor adjusts its output to the cooling/heating
demand. If the current room temperature is far from the set tem-
perature, the provision of cooling/heating output for the room
will be accordingly high. If the temperature differential decreases,
the appliance reacts to the change in requirements and provides
a lower cooling or heating output. This results in advantages of
economy and convenience when compared with appliances wit-
hout inverter technology, where the compressor either runs at
maximum output or is off.
Heat metering
The appliance is equipped with an integral heat meter. In the
„INFO“ menu, the supplied amounts of heat are displayed.
4. Operation
4.1 Controls
The programming unit enables you to change parameters and
to obtain information on the appliance operation. The appliance
can also be controlled when no programming unit is connected
or the connected one is faulty. The programming unit comprises
the scroll wheel, two keys and above these a display.
