Heating curve
The heating curve determines which heat the heat pump is to produce
depending on the temperature outdoors. If a high value is selected, this
tells the heat pump that it must produce a lot of heat when it is cold out-
doors in order to achieve a warm indoor temperature.
Heating medium side
Pipes to the house’s climate system and condenser make up the heating
medium side.
Level monitor
Accessory that senses the level in the level vessel and gives an alarm if it
becomes too low.
Level vessel
Partially transparent vessel with brine with the task of equalising the
pressure in the brine system. When the temperature of the brine increases
or decreases, the pressure in the system changes and the level in the level
vessel also changes.
Mixing valve
A valve that mixes the cold water with the hot water leaving the heater.
Outside sensor
A sensor that is located outdoors. This sensor tells the heat pump how hot
it is outdoors.
Passive cooling
See "Free cooling".
Pressostat
Pressure switch that triggers an alarm and/or stops the compressor if non-
permitted pressures occur in the system. A high pressure pressostat trips
if the condensing pressure is too great. A low pressure pressostat trips if
the evaporation pressure is too low.
Radiator
Another word for heating element. They must be filled with water in order
to be used with F1255.
Refrigerant
Substance that circulates around a closed circuit in the heat pump and
that, through pressure changes, evaporates and condenses. During evap-
NIBE™ F1255Chapter 6 | Glossary76
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