Vaillant flexoTHERM exclusive VWF 57/4, Инструкции по установке и обслуживанию

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3 System overview
8
Installation and maintenance instructions flexoTHERM exclusive 0020196687_03
take place via circulation reversal. The heat pump can be
connected to three different types of heat source. This in-
cludes the outdoor air, geothermal energy and ground water,
whereby the heat source is connected to the heat pump via a
transfer station.
3.1.1 Heat pump
–
Fulfils the heating demand of the system controller down
to a minimum outside temperature and up to a maximum
target flow temperature.
–
Fulfils the cooling requirements of the system controller
up to a maximum source temperature.
–
Hot water generation with external domestic hot water
cylinder
3.1.2 Ground water module
Heat transfer from the ground water to the brine heat transfer
medium in the heat pump.
3.1.3 Air/brine collector
Heat transfer from the air to the brine heat transfer medium
in the heat pump.
3.1.4 Passive cooling module (optional)
When using ground or ground water as a heat source, the
heat of the heating water is transferred to the heat source
medium purely using circulation pumps and valve switching.
3.2 Functionality
3.2.1 Heat pump
2
3
1
4
5
6
7
8
9
10
11
12
13
1 Heating installation
2 Domestic hot water
cylinder (optional)
3 Heating circuit
4 Compressor
5 Refrigerant circuit
6 Brine circuit
7 Heat source
8 Brine pump
9 Evaporator
10 Electronic expansion
valve
11 Condenser
12 Heating/cylinder char-
ging diverter valve
13 Electric back-up heater
The heat pump consists of the following separate circuits
which are coupled with one another by means of heat ex-
changers. These circuits are:
–
The brine circuit, which extracts thermal energy from the
ground, the outdoor air or the ground water, and transfers
this to the refrigerant circuit
–
The refrigerant circuit, which is used to bring the thermal
energy from the heat source to a usable, higher temper-
ature level and deliver it to the heating circuit
–
The heating circuit, which is used to heat up the living
rooms
The refrigerant circuit is connected via the evaporator to the
heat source, from which it extracts thermal energy. At the
same time, the physical state of the refrigerant changes;
it evaporates. The refrigerant circuit is connected via the
condenser to the heating installation, to which it releases the
thermal energy again. In so doing, the refrigerant becomes
liquid again; it condenses.
As thermal energy can only pass from a body at a higher
temperature to a body at a lower temperature, the refrigerant