Method of controlling a carbon dioxide heat pump water...

Details Method of controlling a carbon dioxide heat pump water... Method of controlling a carbon dioxide heat pump water...

2006-03-14

2006-03-14

Ali, Mohammad M. (Department: 3744)

Refrigeration

Processes

Compressing, condensing and evaporating

C062S126000

Reexamination Certificate

active

07010925

ABSTRACT:
A method of detecting and diagnosing operating conditions for a heat pump water heating system includes the steps of monitoring system operating conditions and comparing actual operating conditions to predicted operating conditions. The predicted operating conditions are based on expected pressures and temperatures given current system inputs. A difference between the actual and expected values for refrigerant pressures and temperature outside a desired range provides indication of a fault in the system. The system controller initiates a prompt to alert of the need for maintenance and direct to potential causes.

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