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
evaporation, the refrigerant absorbs heating energy and when condensing
gives off heating energy.
RETURN PIPE
The line in which the water is transported back to the heat pump from
the house heating system (radiators/heating coils).
RETURN TEMP
The temperature of the water that returns to the heat pump after releas-
ing the heat energy to the radiators/heating coils.
ROOM SENSOR
A sensor that is located indoors. This sensor tells the heat pump how
hot it is indoors.
SAFETY VALVE
A valve that opens and releases a small amount of liquid if the pressure
is too high.
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Chapter 6 | Glossary
NIBE F1255
