General
Pipe installation must be carried out in accordance with
current norms and directives.
F2040 can only operate up to a return temperature of
about 55 °C and an outgoing temperature of about 58 °C
from the heat pump.
F2040 is not equipped with external shut off valves on
the water side; these must be installed to facilitate any
future servicing. The return temperature is limited by
the return line sensor.
WATER VOLUMES
When docking with F2040 free flow in the climate sys-
tem is recommended for correct heat transfer. This can
be achieved by use of a bypass valve. If free flow cannot
be ensured, it is recommended that a buffer tank (NIBE
UKV) is installed.
Following water volumes are recommended
-16-12-8-6F2040
150 l80 l50 l20 lMinimum volume, climate
system during heating/cool-
ing
150 l100 l80 l50 lMinimum volume, climate
system during under floor
cooling
NOTE
The pipe work must be flushed before the heat
pump is connected, so that any contaminants
do not damage the components.
Pipe coupling heating
medium circuit
• F2040 can be connected to the heating system accord-
ing to one of the system solutions that can be down-
loaded from the website www.nibe.co.uk.
• The heat pump must be vented by the upper connec-
tion (XL1) using the venting nipple on the enclosed
flexible hose.
• Install the enclosed particle filter before the inlet, i.e.
the lower connection (XL2) on F2040.
• All outdoor pipes must be thermally insulated with at
least 19 mm thick pipe insulation.
• Install shutoff and drain valves so that F2040 can be
emptied in the event of prolonged power failures.
• The supplied flexible hoses act as vibration dampers.
The flexible pipes are fitted so an elbow is created,
thus acting as vibration damping.
Before installing the heat pump in an existing system,
it is important that the system is properly flushed
through.
Even if the heat pump is to be installed in a new system,
the heat pump and system should be flushed.
NOTE
Ensure that cleaning agent has been removed
from the entire system before adding inhibitor.
After flushing an inhibitor should be used for long-term
anti-corrosion protection.
NIBE Energy Systems Limited recommends water
treatments (supplied by e.g. Fernox and Sentinel) spe-
cifically designed for heat pumps.
CHARGE PUMP
The charge pump (not included in the product) is
powered and controlled from the indoor module/control
module. It has a built-in anti-freezing function and must
therefore not be switched off when there is a risk of
freezing.
At temperatures below +2 °C the charge pump runs
periodically, to prevent the water from freezing in the
charge circuit. The function also protects against excess
temperatures in the charge circuit.
27Chapter 4 | Pipe connectionsNIBE F2040
4 Pipe connections
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