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Outside temperature limits for air/water heat pumps /
Air/water heat pumps utilise outdoor air as the heat
source. They only operate efficiently within certain out-
side temperature limits, e.g. between 20 °C and
+35 °C. If the temperature rises above the upper limit
or falls below the lower limit, these heat pumps tempo-
rarily shut down. You will see a message about this on
the heat pump control unit.
In order to meet the heat demand for central heating
and DHW heating outside the temperature limits, the
heat pump control unit automatically switches on the
available auxiliary heaters as required, e.g. electric
booster heater.
Note
You must enable electric booster heaters for heat gen-
eration: See page 39.
Once the outside temperature is back within the tem-
perature limits, the heat pump is automatically ready
for operation again.
Temperature limits for brine/water heat pumps and water/water heat pumps
With brine/water heat pumps and water/water heat
pumps, the heat is transferred to the heat pump via the
heat transfer medium (brine). As heat sources, the
ground and groundwater remain at an almost constant
temperature level throughout the year. It is therefore
extremely unlikely that the permissible temperature
limits for brine entry into the heat pump will be excee-
ded or undershot.
If your brine/water heat pump or water/water heat
pump shuts down due to excessively high or low brine
inlet temperatures, there may be a fault. You will see a
message about this on the heat pump control unit. In
such cases, inform your local contractor.
Commissioning
The commissioning and matching up of the heat pump
control unit to local conditions and to the structural
characteristics of the building, plus the instruction of
the user in operating the system, must be carried out
by your heating contractor.
Note
These operating instructions also describe functions
that are only available on some heat pump models or
only with accessories. These functions are not specifi-
cally identified.
Your contractor will have listed the equipment and
functions of your heating system in the form on
page 102.
For questions relating to the scope of and accessories
for your heat pump and your heating system, contact
your contractor.
Your system is preset at the factory
Your heating system is preset at the factory and is
therefore ready for operation:
Central heating/central cooling
Your home will be heated to 20 °C from 00:00 to
24:00 h "Set room temperature" (standard room
temperature).
If a buffer cylinder is installed, this buffer cylinder will
be heated.
Active cooling mode is blocked: See page 40.
DHW heating
The DHW is heated every day from 00:00 to 24:00 h
to 50 °C "Set DHW temperature".
Any installed DHW circulation pump is switched off.
The electric booster heater, if installed, is enabled:
See page 39.
Introductory information
Product information (cont.)
5817913
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