Nibe F2050 - Pipe Connections; General

General
Pipe installation must be carried out in accordance with
current norms and directives.
The pipe dimension should not be less than the recommen-
ded pipe diameter according to the table. However, each
system must be dimensioned individually to manage the
recommended system flows.
MINIMUM SYSTEM FLOWS
The installation must be dimensioned to manage at least
the minimum defrosting flow at 100% pump operation, see
table.
Minimum re-
commended
pipe dimen-
sion (mm)
Minimum re-
commended
pipe dimen-
sion (DN)
Minimum flow
duringdefrost-
ing
(100% pump
speed (l/s)
Air/waterheat
pump
22200.19
F2050-6
F2050-10
NOTE
An undersized system can result in damage to the
product and lead to malfunctions.
F2050 can only operate up to a return temperature of about
55 °C and an outgoing temperature of about 58 °C from the
heat pump.
F2050 is not equipped with shut-off valves on the heating
medium side, rather these must be installed to facilitate any
future servicing. The return temperature is limited by the
return line sensor.
NOTE
This installation is subject to building regulation
approval, notify the local Authority of intention to
install.
NOTE
Use only manufacturer’s recommended replace-
ment parts.
HARD WATER AREAS
Normally, there should not normally be any problem installing
F2050 in hard water areas, as the operating temperature is
50–60°C.
CLEANING THE CLIMATE SYSTEM
When the water heater and the climate system have been
filled with water, F2050 must operate at maximum normal
temperature for at least one hour. Thereafter the system
must be drained of water and refilled.
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) specifically designed
for heat pumps.
WATER VOLUMES
When docking with F2050 free flow in the climate system
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
-10-6F2050
50 l20 lMinimum volume, climate system during heat-
ing/cooling
80 l50 lMinimum volume, climate system during under
floor cooling
NOTE
The pipe installation must be flushed out before
the heat pump is connected so debris cannot
damage component parts.
NIBE F2050Chapter 4 | Pipe connections22
Pipe connections