Maintenance of F1145
Regular checks
Your heat pump is, in principle, maintenance free and therefore requires
minimal care after commissioning. However, it is recommended that your
installation is checked and serviced annually by qualified personnel. This
is to ensure the continued efficient operation of your heat pump, and that
the warranty remains valid during the warranty period.
All servicing must be carried out by a person competent for the job.
If something unusual occurs, messages about the malfunction appear in
the display in the form of different alarm texts. See alarm management
on page 62.
Level vessel
The brine that obtains the heat in the ground is not normally
consumed but just pumped around. In most installations,
there is a level vessel where you can check if there is sufficient
fluid in the system. Ask your installer if you are unsure where
the level vessel is located. The level can vary due to the fluid’s
temperature. If the level is below 1/3 topping up is required.
Contact your installer for assistance with filling.
1/3
LEK
Expansion vessel
The brine that obtains the heat in the ground is not normally
consumed but just pumped around. In some installations
there is an expansion tank instead of a level vessel (for ex-
ample, where the heat pump is not at the highest point in the
brine system) where the system pressure can be checked. Ask
your installer if you are unsure where the expansion tank is
located. The pressure can vary due to the fluid’s temperature.
The pressure should not fall below 0.5 bar. Contact your in-
staller for assistance with filling.
LEK
Safety valve
If your heating system has a water heater, it also has a safety valve that
occasionally releases water after hot water usage. This is because the cold
water, which enters the water heater to replace the hot water, expands
when heated causing the pressure to rise and the safety valve to open.
19NIBE™ F1145Chapter 2 | The heat pump – the heart of the house
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