ATW MINI 11 Manuel de l'utilisateur - Page 6

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DIMENSIONS

7. OPERATING PRINCIPLE

The heat pump appliance is used to acquire low-temperature energy from the selected source and its transfer to

higher temperature level. The air to water heat pump extracts heat from the ambient air.

The core of the heat pump serves as an efﬁcient compressor through which the refrigerant is compressed and

then expanded in a hermetically closed circuit. This process makes the best of the refrigerant qualities

case, the ecological refrigerant R410 is used.

On the entry side (outdoor unit and its evaporator), the outdoor air is run by the fan through the heat transfer

surface of the evaporator. The refrigerant, which passed through the expansion valve and is quenched to

temperature lower than the temperature of the ambient air, circulates inside the evaporator.

Refrigerant is warmed on the evaporator (for example from -17°C to -10°C) and the acquired heat is stored in

the refrigerant and is further pressed by the compressor and distributed into the condenser (indoor unit).

The refrigerant then condenses on the indoor unit plate exchanger and thus the heat is transferred to the

heating medium (heating water).

The condensed refrigerant then heads back into the expansion valve and the whole cycle repeats itself over and

over again.

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