Table of Contents
Closed-loop control
Extensions and external interfaces
External solar thermal installation
4.3.4 External
solar thermal installation
Note
60
This interface serves for the combination of Aquarea heat pump with a
solar thermal installation for water heating via the Panasonic hot water
tank. Operation of the heat pump is adapted based on an additional PCB
that is available as an accessory for solar thermal connection for opera-
tion of the solar thermal installation. In addition, via an inherent input one
can check whether the solar pump is running or not. As soon as a 230 V
(AC) voltage is availible at the respective input (solar pump running), the
externally connected 3-way directional valve will be opened via the con-
trol system of the Aquarea heat pump, so that heat from the solar circuit
can be output directly to the hot water tank. When the external solar con-
troller switches on the solar pump, the external 3-way directional valve
will be connected again (see also Hydraulic Diagram 4) via the control
system of the Aquarea heat pump.
17 18
19 20 21
22 23
M
Connection of the external 3-way directional valve and the input signal of the solar pump
to the terminals 19 to 21 or 22 and 23 of the terminal strip. The 3-way directional valve
has to be connected such that in that it prevents the passage from solar circuit and heat
exchanger of the hot water tank.
For the combination of the Aquarea heat pump with a solar thermal instal-
lation, a solar pump must be used with a heat exchanger. Through this,
the solar heat is first transferred from the solar circuit to the heating
system water and subsequently to the hot water in the hot water tank.
The additional PCB for the solar connection does not replace the solar
controller, but rather serves as a means of communication and optimi-
sation. To combine Aquarea heat pumps with a solar thermal installa-
tion, a separate solar controller (to be provided by the customer) is
required in addition to the additional PCB.
Aquarea air / water heat pump – design handbook 07 / 2014
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