5
EN-114B_f.1294
Cooling circuit
All components of the refrigeration circuit, with the exception of the condenser, are
located in the external module, including the refrigeration circuit controller with electronic
expansion valve. Depending on the operating conditions, the compressor power is
adjusted with an inverter. The internal and external modules are connected to each other
by refrigerant hydraulic hoses. For cooling heat pumps, the cooling circuit is reversed for
room cooling. Overview of heat pumps assigned to used refrigerant: see section "Types".
Hydraulic installation
The high-performance circulation pump (secondary pump) built into the internal module
supplies heating water to the secondary circuit. The central 3-way switching valve
"heating/heating hot water" is responsible for switching between space heating and
hot water heating.
Installation with heating water buffer tank
■
Space heating
The heat pump heats 3 heating/cooling circuits:
1 heating/cooling circuit without a mixer and
2 heating/cooling circuits with mixer.
■
Room cooling
The heat pump can only cool for one of the max. 3 heating/cooling circuits or through
a separate cooling circuit. The heating water buffer tank is bypassed by a hydraulic
bypass.
Installation with heating/cooling water buffer tank
■
Space heating
The heat pump can heat up to max. 3 heating/cooling circuits: 1 heating/cooling
circuit without mixer and 2 heating/cooling circuits with mixer.
■
Room cooling Heat pump can cool max. 3 heating/cooling circuits. It is not possible
to cool the rooms through a separate cooling circuit.
Heat pump regulator
The entire heating system is monitored and controlled by the heat pump regulator.
The heat pump controller is built into the internal module. Communication between the
internal and external modules takes place via the Modbus.
