Pipe connections
General
Pipe installation must be carried out in accordance with cur-
rent norms and directives.
F2025 operates up to a return temperature of about 50 °C
and an outgoing temperature of about 58 °C from the heat
pump. Because F2025 is not equipped with shut off valves
these must be installed outside the heat pump to facilitate
any future servicing. The return temperature is limited by the
return line sensor and is adjusted on channel A2.
NOTE
The pipe work must be flushed before the heat pump
is connected, so that any contaminants do not damage
the components parts.
Pipe coupling heating medium circuit
F2025 can be connected to the heating system, see the
"Docking" section or one of the system solutions that can
be downloaded from the website www.nibe.eu.
The heat pump must be vented by the upper connection (70,
HM-out) using the venting nipple on the enclosed flexible
hose.
The supplied particle filter (SF) must be installed before the
inlet, i.e. the lower connection (71, HM-in) on F2025. All
outdoor pipes must be thermally insulated with at least
19 mm thick pipe insulation.
The charge pump must be operational, even if F2025
is not running, to prevent damage due to freezing.
The charge pump can also be controlled directly from F2025,
terminal (11), which takes the outdoor temperature into
consideration. Alternatively, the heat pump is connected to
an intermediate circuit with a heat exchanger, pump and
water with anti-freeze (does not apply to docking with
VVM300).
Shutoff (AV) and drain valves (TV) are fitted so that F2025
can be emptied in the event of prolonged power failures.
The supplied flexible hoses act as vibration dampers. The
flexible hoses are fitted so a slight bend is created, thus acting
as vibration damping.
Water volumes
When docking with F2025 a total water volume in the boiler
and accumulator of at least 20 litres boiler water per kW
output on the heat pump is recommended.
Pressure drop, heating medium side
F2025 -6, 8, 10, 14
0
1
2
3
4
5
6
7
8
9
0 0,10 0,20 0,30 0,40 0,50 0,60 0,70
kPa
Tryckfall
6 kW 8, 10 kW
14 kW
Flöde
l/s
3UHVVXUH GURS
)ORZ
OV
N3D
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