FIGHTER 600P consists of an electric boiler with enam-
elled water heater and a heat pump that recovers energy
from ventilation air and outdoor air when this is - 5 °C or
warmer. If the outdoor temperature is colder than - 5 °C
a damper closes so that only ventilation air is used as
the heat source. The recovered energy is supplied to the
heat pump. The heat pump must be installed in a ventila-
tion system intended for mechanical exhaust air.
When the exhaust air at room temperature together with
the outdoor air passes through the evaporator, the refrig-
erant evaporates because of its low boiling point. In this
way the heat in the air is transferred to the refrigerant.
The refrigerant is then compressed in a compressor,
causing the temperature to rise considerably.
The warm refrigerant is led to the condenser (plate heat
exchanger). Here the refrigerant gives off its heat to the
boiler water, so that its temperature drops and the refrig-
erant changes state from gas to liquid.
The refrigerant then goes via filters to the expansion
valve, where the pressure drops and the temperature is
lowered further.
The refrigerant has now completed its circulation and
returns to the evaporator.
When the heat pump’s output is not solely sufficient an
integrated immersion heater is connected in. The output
of the immersion heater is 9.0 kW.
System description
3
For Home Owners
FIGHTER 600P
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