Patent ID: 7310960
Filing Date: 2007-12-25
Classification: F24D,F25B

Abstract:
1. A system for heating water comprising: a refrigerant cycle including a compressor for compressing refrigerant and delivering compressed refrigerant to a first heat exchanger, an expansion device downstream of said first heat exchanger, and a second heat exchanger downstream of said expansion device, refrigerant passing from said compressor to said first heat exchanger, to said expansion device, to said second heat exchanger, and then returning to said compressor; a water circuit for passing water to be heated through said first heat exchanger, such that it can be heated by refrigerant in said first heat exchanger; and a drain for draining water at a location adjacent to said first heat exchanger from said water circuit, said drain being operable for draining water from said first heat exchanger, at least said first heat exchanger being positioned in an outdoor environment.