Nibe F205P - Heating System Maintenance; Filling the Heating System

3
F205P
For Home Owners
System description
Principle of operation
F205P comprises an electric boiler with a stainless steel
water heater and a heat pump which recovers energy
from the ventilation air. The recovered energy is supplied
to the heat pump. The heat pump must be installed in a
ventilation system intended for mechanical exhaust air. A
DC fan is used in F205P.
The output of the immersion heater is 3 kW. When the
exhaust air at room temperature passes through the evapo-
rator, the refrigerant 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, caus-
ing the temperature to rise considerably.
The warm refrigerant is led to the condenser. Here the
refrigerant gives off its heat to the boiler water, so that the
temperature of the the refrigerant drops and its phases
changes from gas to liquid. The refrigerant then goes via a
filter to the expansion valve, where the pressure drops and
the temperature is lowered further.
The refrigerant has now completed its circulation and re-
turns to the evaporator.
System description
System diagram
LEK
C
When the room air has
passed through the heat
pump it is discharged. The
temperature of the air has
been significantly reduced as
the heat pump has extracted
the energy in the room air.
G
The air from the kitchen
fan goes directly out into
a separate duct.
B
The warm room
air is fed to F205P
D
F205P supplies the house
with both hot water and
room heating.
E
Outdoor air is drawn into the house.
A
The warm room air is
drawn into the air duct
system.
F
Air is transported from
rooms with outdoor
air devices to rooms
with exhaust air
devices.
FrånluftAvluft
FrånluftAvluft
FrånluftAvluft
EJ ÄNDRAD
Extract air
Exhaust air