US 9,810,449 B2
Methods and apparatus for heating air with hot water
James York, Sharpsburg, GA (US); and Hugh L. Allen-Magande, Alpharetta, GA (US)
Assigned to Rinnai America Corporation, Peachtree City, GA (US)
Filed by Rinnai America Corporation, Peachtree City, GA (US)
Filed on Mar. 2, 2014, as Appl. No. 14/194,752.
Application 14/194,752 is a continuation of application No. 13/733,409, filed on Jan. 3, 2013, granted, now 8,662,404.
Application 13/733,409 is a continuation of application No. 11/789,219, filed on Apr. 24, 2007, granted, now 8,353,463, issued on Jan. 15, 2013.
Prior Publication US 2015/0053198 A1, Feb. 26, 2015
Int. Cl. F24H 6/00 (2006.01); F24H 1/00 (2006.01); F24H 1/22 (2006.01); F24D 5/02 (2006.01); F24D 5/04 (2006.01); F24D 19/10 (2006.01); F24D 3/08 (2006.01); F28D 1/02 (2006.01)
CPC F24H 6/00 (2013.01) [F24D 3/08 (2013.01); F24D 5/02 (2013.01); F24D 5/04 (2013.01); F24D 19/1009 (2013.01); F24D 19/1084 (2013.01); F24H 1/0027 (2013.01); F24H 1/22 (2013.01); F28D 1/024 (2013.01); Y10T 137/0357 (2015.04)] 6 Claims
OG exemplary drawing
 
6. A system for generating and heating air from a heated water source comprising:
a water heater comprising a burner and a water heater exchanger to produce hot water, an air handler pump operative to flow water out of the water heater and into the air handler, and an electronic controller connected to monitor water flow indicia and generate a signal associated with the water flow indicia; said water source also provided simultaneously for other water uses, said system capable of regulating the apportionment of said heated water source between demand for heated air and other domestic water uses;
an air handler comprising a blower/fan and an air handler heat exchanger to generate heated air from hot water, said pump operative to receive hot water from the water heater for passage to the air handler heat exchanger, and said controller operative to control said pump and/or said blower/fan in response to the signal or absence of the signal;
said system further including said controller for
a. receiving a call for heated air;
b. initiating operation of air said pump associated with the air handler;
c. detecting whether a flow of water through said pump is at a predetermined level to generate heated air from the hot water;
d. responsive to detecting that flow of water through the pump, if the flow is not at or above said predetermined level because of water use demand for other uses, terminating operation of said pump for a predetermined period of time to prevent the air handler from delivering air below a predetermined temperature;
e. responsive to detecting that flow of water through the pump, if below said predetermined level sufficient to generate heated air from the hot water, maintaining said pump in operation;
f. initiating operation of said fan to supply heated air generated by heat exchange with the hot water; and
g. terminating operation of at least one of the pump and said the fan when the call for heat is satisfied.