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Pressure controls for heat pumps

Sunday, 20 May 2012

The pressures in a heat pump should always remain within some specified range: this is a basic requirement for all heat pumps. And manufacturers install high and low-pressure switches to ensure that they do, i.e. that the pressure never goes beyond the heat pump’s range of operating pressures. 

Here is how that works:

Information about the current pressure within the system is generally passed to the pressure switch via a separate spur pipe, but if the pressure switch is mounted directly on the main pipe (cartridge pressure controls) there will be no need for this. In either case, the pressure activates a floating contact system that (e.g.) switches the compressor off in an emergency.