
8Operating instructions 0020291589_02
4 Operation
4.1 Basic display
The display shows the basic display with the product's cur-
rent operating mode. If you press a selection button, the ac-
tivated function is displayed in the display.
As soon as a fault message is present, the basic displays
switches to the fault message.
The kWh value in the basic display represents the total cal-
culated energy yield: Heating, cooling and domestic hot wa-
ter mode.
The energy yield for the individual operating modes can be
displayed by repeatedly pressing the mode push button.
4.2 Operating levels
The product has one operating level.
This provides access to the most important information and
setting options that do not require any particular prior know-
ledge.
4.3 Starting up the product
4.3.1 Opening the isolator devices
1. Ask the competent person who installed the product to
explain to you where these isolator devices are located
and how to handle them.
2. If installed, open the service valves in the heating in-
stallation's flow and return.
3. Open the cold-water isolation valve.
4.3.2 Switching on the product
Note
The product does not have an on/off switch. The
product is switched on and ready for operation
as soon as it is connected to the power grid. It
can only be switched off using the partition that is
installed on-site, e.g. fuses or circuit breaker in the
utility connection box.
1. Ensure that the product casing has been installed.
2. Switch on the product via the fuses in the utility con-
nection box.
◁The "basic display" is shown in the product's oper-
ating display.
◁The basic display also appears on the system con-
trol display.
4.3.3 Adjusting the target cylinder temperature
Danger!
Risk of death from legionella.
Legionella multiply at temperatures below
60 °C.
▶Have a competent person inform you
about the measures that should be taken
to protect against Legionella in your in-
stallation.
▶Do not set any water temperatures below
60 °C without consulting the competent
person first.
Depending on the source of the energy obtained from the
environment, target cylinder temperatures of up to 70 °C can
be reached with the compressor. In order to achieve energy-
efficient domestic hot water generation predominantly from
the energy extracted from the environment, the factory set-
ting for the desired domestic hot water temperature must be
adjusted on the system control.
▶To do this, set the target cylinder temperature to between
50 and 55 °C on the system control.
▶Also switch on the electric back-up heater for the do-
mestic hot water generation so that, also at outdoor tem-
peratures below 0 °C and above 20 °C, the required
60 °C can be achieved for the anti-legionella function
time programme.
4.3.4 Displaying the Live Monitor (current product
status)
Status codes in the display provide information on the pro-
duct's current operating mode.
To call up the status codes, press the two buttons at the
same time.
4.4 Setting the heating flow temperature
▶Set the heating flow temperature on the system control,
→System control operating instructions.
4.5 Setting the domestic hot water temperature
▶Set the domestic hot water temperature on the system
control, →System control operating instructions.
4.6 Switching off the product's functions
4.6.1 Switching off heating mode (Summer mode)
▶Switch off heating mode on the system control (summer
mode), →System control operating instructions.
4.6.2 Switching off domestic hot water generation
▶Switch off the domestic hot water generation at the sys-
tem control (→System control operating instructions).
4.6.3 Draining the heating installation
Another way to protect the heating installation and the
product from frost for very long switch-off times is to drain
them completely.
▶Consult a competent person about this.