17
„Heating return“ connection
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2
3
4
3
5
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3
6
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1 „Heating return“ connection
2 Plug-in connector
3 Flanged pipe
4 Filter ball valve
5 „Heating flow“ connection
6 Ball valve
Using a push-fit connector, connect one of the flanged pipes
supplied to the heating return connection.
Connect the filter ball valve to the flanged pipe end.
Reconnect a flared pipe to the end of the ball valve.
Connect the flanged pipe with a push-fit connector to the
heating circuit return.
„Heating flow“ connection
Using a push-fit connector, connect one of the flanged pipes
supplied to the connection for the heating flow.
Connect a ball valve to the flanged pipe end.
Connect a flanged pipe to the other side of the ball valve.
Connect the flanged pipe with a push-fit connector to the
heating circuit flow.
Thermal insulation
Provide thermal insulation in accordance with current
regulations.
Water quality
Carry out a fill water analysis before filling the system. This may,
for example, be requested from the relevant water supply utility.
To avoid damage as a result of scaling, it may be necessary to
soften or desalinate the fill water. The fill water limits specified
in chapter „Specification/ Data table“ must always be observed.
Recheck these limits 8-12 weeks after commissioning and as
part of the annual system maintenance.
Note
With a conductivity > 1000μS/cm, desalination treatment
is recommended in order to avoid corrosion.
Note
If you treat the fill water with inhibitors or additives, the
same limits apply as for desalination.
Note
Suitable appliances for water softening, as well as for
filling and flushing heating systems, can be obtained via
trade suppliers.
Minimum flow rate
The appliance is designed in such a way that no buffer cylinder
is required to provide hydraulic separation of the flow in the heat
pump circuit and the heating circuit in conjunction with area hea-
ting systems. If several heating circuits are used, we recommend
using a low loss header.
Note
The minimum flow rate must be maintained at every
operating point of the heat pump to ensure perfect heat
pump operation (see "Commissioning/ Commissioning").
To do this, the following options are available:
Install a remote control in a lead room and open this
heating circuit fully.
Install a low loss header or buffer cylinder.
The lead room is the room where the remote control is installed,
preferably the living room or bathroom. The lead room can be
regulated with an external programming unit, or indirectly by ad-
justing the heating curve. See chapter „Operation/ MAIN MENU/
SETTINGS
/ HEATING“ in the operating instructions.
If an underfloor heating thermostat is installed, it should be set
with a sufficient differential (at least 20K) from the maximum
set heating circuit temperature. The electrical connection of the
underfloor heating thermostat is shown in chapter „Specification/
Connection examples“.
!
Material losses
In the "INFO" menu, the appliance offers the option to
display the water pressure.
Ensure that the pump does not run without water.
5.5 Water connection
!
Material losses
Never install the push-fit connectors in the DHW line.
Never install the push-fit connectors to the solar flow or
solar return connections. Only install the push-fit con-
nectors in the heating circuit.
Stainless steel, zinc-plated steel, copper or plastic pipework are
approved materials for the cold water line.
We approve stainless steel, copper or plastic pipework for the
DHW line.
Remove the protective caps from the cold water inlet and
DHW outlet connections.
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