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4.3.2 Deactivation
of heating circuits
in cooling mode
4.3.3 External control of
the Aquarea heat pump
Note
Aquarea air / water heat pump – design handbook 07 / 2014
Deactivation of heating circuits in cooling mode | External control
Heating circuits that can be used exclusively for the heating mode and
not for the cooling mode (e.g. radiators), can be deactivated automatically
by means of an external 2-way directional valve on the control system of
the Aquarea heat pump in the cooling mode (see e.g. Hydraulic Dia-
grams 3 and 6).
1
2
3
4
5
6
M
Connection diagram for the automatic deactivation of heating circuits in cooling mode
via 2-way directional valves to the connections 1 to 3 of the terminal strip.
Left: Spring loaded 2-way directional valve, open without current,
right: Motor-driven 2-way directional valve with single-pole change-over switch.
To be able to control the Aquarea heat pump by means of an external
controller, the latter can be activated and deactivated by means of its
own interface. The interface consists of a 2-position contact, which in
the closed state activates the heat pump. An external, overriding control
system can control several heat generators in paralell or in cascade
sequence via the interface (see e.g. Hydraulics 9 and 10).
1
2
3
4
5
6
7
8
Connection of the external control to the terminals 17 and 18 of the terminal strip
In the delivery state, the terminals 17 and 18 are bridged.
The Aquarea heat pump is thereby activated.
Extensions and external interfaces
1
2
3
4
5
6
M
9 10 11 12
13 14
15 16
17 18
Closed-loop control
19 20 21
22 23
59
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