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System version
The system version describes the components of your
system, such as heat pump, heating circuit pump,
mixer, valves, control unit, radiators, etc.
Your contractor will adjust the heating system to the
local conditions and customise the system to suit your
requirements.
Self-consumption
When utilising power generated on site, the power
generated by the photovoltaic system is used to oper-
ate the heat pump and other heating system compo-
nents.
Your contractor has connected an electricity meter
(energy meter) to the heat pump control unit for the uti-
lisation of power generated on site. It supplies the heat
pump control unit with information about whether and
how much power is available from the photovoltaic
system.
Display on electricity meter
Energy supplied by the grid (power supply utility):
The electricity meter shows the output with a minus
sign in front of it:
Fig. 14
Note
Up to 3 fault bars are displayed on the electricity
meter. This does not affect the function of the heat
pump control unit.
Energy fed into the grid (power supply utility):
The electricity meter shows the output without a plus/
minus sign in front of it.
Functions for the utilisation of power generated on
site
Enable one or more functions for the utilisation of
power generated on site. The functions that can be uti-
lised depend on the appliance type.
If you enable several functions for the utilisation of
power generated on site, the functions for DHW heat-
ing will have priority over the functions for central heat-
ing.
To utilise the power generated on site, you can raise
the set temperature for some functions or lower it for
cooling.
Example: utilisation of power generated on site for
DHW heating
If sufficient power from the photovoltaic system is
available, the heat pump will be operated for DHW
heating using this power.
In the time program you have set the time phases dur-
ing which DHW heating is enabled. In order to use as
much of the power generated by the photovoltaic sys-
tem as possible, DHW heating may also be switched
on outside the set time phases.
In order to make more effective use of power gener-
ated on site, set an increase for the DHW temperature.
Standard DHW temperature:
50 °C
Increase the DHW temperature when utilising power
generated on site:
10 K (10 Kelvin)
The DHW is heated to 60 °C. If DHW consumption is
the same, the next DHW heating period using power
from the grid is postponed until later.
Electric booster heater
If the required room temperature or DHW temperature
cannot be achieved with the heat pump alone, an elec-
tric booster heater, e.g. an instantaneous heating
water heater, can be activated.
Note
Constant operation of an electric booster heater results
in high electricity consumption.
Power-OFF
At times of high demand for electricity, your power sup-
ply utility can block the power supply to the outdoor
unit [Germany]. During this power-OFF period, the
message "Power-OFF enabled" is shown on the dis-
play.
The outdoor unit is available for use again as soon as
the power supply utility re-enables the power supply.
During the power-OFF period, the system will be sup-
plied with heat only by the instantaneous heating water
heater.
Appendix
Terminology (cont.)
6199692
62


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