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20/12/2017 - Version 1.0
6.5
Solar power system
integration
Fig. 10 is an example of solar power system integration.
Cold water intake pipe
Solar power system pump and accessories
Solar collectors
Heat pump
Recirculation pump
Spring check valve
Drain tap
Solar thermal power coil
Hot water outlet pipe
Fig. 10
– Example of solar power system integration
6.6
Electrical connections
The device is wired for the mains power supply. It is
powered through a flexible cable and a socket/plug
combination, as illustrated in Fig. 11 and Fig. 12.
The connection to the mains power supply requires
an earthed Schuko socket with separate protection.
WARNING!
The power supply to which the equipment will be
connected must be protected by an
adequate residual current circuit breaker.
The type of residual current circuit breaker must
be the same as the type of electric
equipment that is used in the entire system.
With reference to the connection to the mains
power supply and the safety equipment (e.g.
residual current circuit breaker) comply with
standard IEC 60364-4-41.
Fig. 11
–A
Schuko
socket
Fig. 12
– Equipment plug
6.6.1 Remote links
The equipment is designed in such a way that it can be
connected to other remote energy systems
(photovoltaic and solar thermal power systems).
The user interface has two digital inputs with the
following functions:
Digital 1
: Input from the solar thermal power
system. When a free contact is established
between terminals 30 and 31 (cable: brown/yellow)
and the water temperature measured by lower
thermistor is higher than SP8, the heat pump stops
and water is heated by the solar panels. The heat
pump restarts when the contact stops and the time
set by C13 has elapsed, or immediately if the
lower thermistor temperature is lower than SP8.
Digital 2
: Input from photovoltaic system.
When a free contact is established between
terminals 31 and 32 (cable: green/white) and the
heat pump reaches the SP5 temperature (default
setting 62°C), the hot water nominal temperature is
raised by 7°C. It is possible to change the SP6
parameter (e.g.: raising the temperature from 62°C
to 70°C) so that, if there is enough PV electrical
energy, the heat drop from 62°C to 70°C occurs
because of the immersion electric heating element
(if SP6 is the same as SP5, the electric heating
element will never activate).
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