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Aquarea air-to-water heat pumps - Planning and installation manual - 02/2022
Product Description
4
i
Note
Detailed information about the control functions is given in the operating instructions
8.1 Operating instructions extract (J Generation), p. 200
) and in the Service manual of the
device concerned.
Additional functions of the remote controller on connecting the optional PCB CZ-NS4P
The installation of the optional PCB CZ-NS4P (→
4.7.2 External interfaces (inputs/outputs),
) allows the following additional functions to be selected or set.
Control and temperature regulation of a connected buffer tank
Selection of connected buffer tank as well as setting of the temperature difference (ΔT). Only available if the buffer
tank is activated.
Control of two heating circuits (including swimming pool heating)
Selection of the number of heating circuits (1 zone or 2 zone system). After a system with two heating circuits has
been selected, information is to be provided as to whether the respective heating circuit is being used for space or
swimming pool heating. If “swimming pool” has been selected, a temperature difference of “ΔT for swimming pool”
must be set between 2 and 10 K.
Input for externally switching off the outdoor unit
Dry contact for an external input signal for switching off the compressor in the outdoor unit (if contact closed). The
function must be enabled through the remote controller of the heat pump.
Integration of a solar system (solar thermal panels)
Selection of the buffer tank or of the domestic hot water tank for the solar system as well as setting of the difference
between switching on and off temperatures, the frost protection temperature and the upper temperature limit. Only
available if the solar system is activated.
External error signal
Dry contact for output of an error message signal (if contact closed) to an external display unit. Even if the fault has
been acknowledged through the external display, the error signal remains internally active.
SG ready control
Dry contact with two inputs (Vcc-Bit1 and Vcc-Bit2). The following settings are possible:
Operating state
SG‑Ready‑Signal
Vcc‑Bit1 Vcc‑Bit2
1 Heat Pump Lock: Heat pump and backup heater are switched off.
1
0
2 Automatic operation: Heat pump runs in normal mode
0
0
3 Increased capacity: Capacity setting 1 (in %) for heating and domestic hot water
0
1
4 Maximum capacity: Capacity setting 2 (in %) for heating and domestic hot water
1
1
The function must be enabled through the remote controller of the heat pump. Moreover, especially the increased-
capacity settings 1 and 2 must be configured via the remote controller. A similar control pattern applies for cooling
operation. Not available for cooling operation for H generation models.
SG ready control for bivalent system
In case of a bivalent system, its control pattern can be selected (Auto / SG ready). When the SG ready control pat-
tern is selected, the following settings are possible on the two SG ready inputs (Vcc-Bit1 and Vcc-Bit2:
Operating state
SG‑Ready‑Signal
Vcc‑Bit1 Vcc‑Bit2
1 Heat Pump OFF, Boiler OFF
0
0
2 Heat Pump ON, Boiler OFF
1
0
3 Heat Pump OFF, Boiler ON
0
1
4 Heat Pump ON, Boiler ON
1
1
Not available for H generation models.
