Publicité
2
Notes on the documentation
▶
Always observe all operating instructions that are en-
closed with the installation components.
▶
Store these instructions and all other applicable docu-
ments for further use.
These instructions apply only to:
Product
HA 6-8.2 STB
3
Product description
3.1
Description of the product
The product is the indoor unit of an air-to-water heat pump
with split technology.
The indoor unit is connected to the outdoor unit via the refri-
gerant circuit.
3.2
Heat pump system
Design of a typical heat pump system with split technology:
1
2
1
Heat pump | Outdoor
unit
2
Modbus line
3
eBUS line
4
System control
(optional)
3.3
Functions of the heat pump
The heat pump has a closed refrigerant circuit in which refri-
gerant circulates.
In heating mode, cyclic evaporation, compression, liquefac-
tion and expansion take in heat energy from the surround-
ings and transfer it to the building. In cooling mode, heat
energy is extracted from the building and released into the
environment.
188
Article number
Country
0010039504
ES, FR
4
3
5
6
7
5
Control for the indoor
unit
6
Heat pump | Indoor unit
7
Refrigerant circuit
3.3.1
Operating principle in heating mode
2
1
3
5
1
Evaporator
2
4-port diverter valve
3
Fan
3.3.2
Operating principle in cooling mode
2
1
3
5
1
Condenser
2
4-port diverter valve
3
Fan
3.4
Safety devices
3.4.1
Frost protection function
The frost protection function for the system is controlled us-
ing the product itself and using the system control. If the sys-
tem control fails, the product guarantees limited frost protec-
tion for the heating circuit.
3.4.2
Low-water pressure protection
This function continuously monitors the heating water
pressure in order to prevent a possible loss of heating water.
If the water pressure falls below the minimum pressure,
an analogue pressure sensor switches off the product and
switches the other modules, where these exist, to standby
mode. The pressure sensor switches the product on again if
the water pressure reaches the operating pressure.
If the pressure in the heating circuit is ≤0.1 MPa (1 bar), a
maintenance message appears below the minimum operat-
ing pressure.
–
Min. heating circuit pressure: ≥ 0.05 MPa
–
Min. heating circuit operating pressure: ≥ 0.07 MPa
3.4.3
Pump blocking protection
This function prevents the pumps for heating water from
sticking. The pumps, which were out of operation for
Operating instructions 8000017440_FT
4
6
4
Compressor
5
Expansion valve
6
Condenser
4
6
4
Compressor
5
Expansion valve
6
Evaporator
Publicité
