Heat pump system with auxiliary water heating

A refrigerant circuit heat pump system operable in at least an air cooling mode and an air heating air mode and having liquid heating capability comprising:

• a refrigerant compressor having a suction port and a discharge port;
• a first selectively positionable valve having a first port, a second port, a third port and a fourth port, said reversing valve being positionable in a first position for coupling the first port and the second port in fluid flow communication and the third port and the fourth port in fluid flow communication, said reversing valve being positionable in a second position for coupling the first port and the third port in fluid flow communication and the second port and the fourth port in fluid flow communication;
• a refrigerant circuit providing a closed loop refrigerant circulation flow path, said refrigerant circuit having a first refrigerant line establishing a flow path between the discharge port of said compressor and the first port of said first selectively positionable valve, a second refrigerant line establishing a flow path between the second port of said first selectively positionable valve and the third port of said selectively positionable valve, and a third refrigerant line establishing a flow path between the fourth port of said selectively positionable valve and the suction port of said compressor;
• an outdoor heat exchanger operatively associated with the second refrigerant line and adapted for passing refrigerant passing through the second refrigerant line in heat exchange relationship with ambient air;
• an indoor heat exchanger operatively associated with the second refrigerant line and adapted for passing refrigerant passing through the second refrigerant line in heat exchange relationship with the air from the comfort zone, said indoor heat exchanger disposed downstream of said outdoor exchanger with respect to refrigerant flow in the air cooling mode and upstream of the outdoor heat exchanger with respect to refrigerant flow through the second refrigerant line in the air heating mode;
• a refrigerant to liquid heat exchanger operatively associated with the first refrigerant line and adapted for passing refrigerant passing through the first refrigerant line in heat exchange relationship with a liquid;
• a second selectively positionable valve having a first port, a second port, a third port and a fourth port, said second selectively positionable valve being positionable in a first position for coupling the first port and the second port in fluid flow communication and the third port and the fourth port in fluid flow communication, said second selectively positionable valve being positionable in a second position for coupling the first port and the third port in fluid flow communication and the second port and the fourth port in fluid flow communication, said second selectively positionable valve being disposed in said second refrigerant line with the first port in flow communication with said indoor heat exchanger and the second port in flow communication with the third port of said first selectively positionable valve;
• a refrigerant reservoir having an inlet coupled by a fourth refrigerant line in fluid flow communication to said second refrigerant line at a location intermediate said outdoor heat exchanger and said indoor heat exchanger and an outlet coupled by a fifth refrigerant line in direct fluid flow communication to said third refrigerant line;
• and
• a bypass bleed flow circuit having a first bleed line coupled in flow communication between said fifth refrigerant line and the third port of said second selectively positionable valve and a second bleed line coupled in flow communication between said indoor heat exchanger and the fourth port of said second selectively positionable valve.