Specifications

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6720649497 SM HP270-1 2012/09 en
Pict.38 – Pressure switch from Danfoss
Various shunt relays are triggered by the pressure switch in order to guarantee safe and effective use of the
refrigerant system under all conditions. Through this process, individual system components are switched on and
off according to the defined pressure points. The pressure switches can fail due to contacting problems or soiling.
Regular system servicing prevents failure.
Pict.39 – Pressure switch, filter drier and expansion valve group
4.5 Evaporator
The evaporator is used for the heat transfer between the air surrounding and the refrigerant in the system. The
refrigerant entering the evaporator under pressure expands, i.e. it converts from a liquid to a gaseous state, and
thus "evaporates" in the evaporator. The cooled air produced by this process is discharged to the environment via
the large surface of the evaporator.
Up to 50% less weight and up to 40% less volume for the same capacity - the striking features of Behr's disc
evaporators have advantages in comparison with traditional round-pipe evaporators: quicker draining of
condensation, lower air resistance, higher air flow and reduction of micro-organisms that cause annoying smell.