A. O. Smith Corporation | Date: 2016-09-28
A modulating burner apparatus includes a variable speed blower feeding a multi-chamber burner having first and second burner chambers. A manifold system communicates the blower with the burner, and a flow control valve member is located between the blower and the second chamber of the burner. The flow control valve is configured to provide fuel and air mixture from the blower to only the first burner chamber at lower blower speeds of the blower and to both the first and second burner chambers at higher blower speeds of the blower.
A. O. Smith Corporation | Date: 2016-08-05
A fuel fired, atmospheric water heater has a burner positioned inside a combustion chamber. All combustion air entering the combustion chamber must pass through a damper. The damper is operable to adjust the flow resistance to combustion air entering the combustion chamber. The damper is biased to a closed position such that during non-firing periods of the water heater, the damper significantly reduces the flow rate of combustion air being provided to the combustion chamber reducing standby heat loss. An actuator is in fluid communication with a fuel supply line such that when pressurized fuel is provided to the burner, the pressurized fuel causes the actuator to move the damper to an open position to permit operative combustion air delivery to the combustion chamber during firing periods of the water heater.
A.O. Smith Corporation | Date: 2015-10-05
The embodiments of the present application disclose a dual sensor combustion system. The dual sensor combustion system comprises: a combustor; a stepless speed regulating fan that supplies air for the combustor; a fuel gas conduit that is in communication with the combustor; a proportional valve provided on the fuel gas conduit; a control unit electrically connected to the stepless speed regulating fan and the proportional valve; a first pressure sensor assembly that detects a first pressure signal of the gas flow passage; a second pressure sensor assembly that detects a second pressure signal of the fuel gas conduit; a storage that stores a correspondence relationship between a first target pressure signal of the gas flow passage and a second target pressure signal of the fuel gas conduit; and the control unit controlling at least one of the stepless speed regulating fan and the proportional valve based on the first pressure signal, the second pressure signal and the correspondence relationship.
A. O. Smith Corporation | Date: 2015-11-23
A water heater including a tank to hold water to be heated, the tank having an outer surface, and a source of heat for heating the water in the tank. The water heater further includes a jacket surrounding the tank, the jacket having an inner surface facing the tank, a plastic skin attached to the outer surface of the tank, and an annular space between the tank and the jacket. In addition, the water heater includes foam insulation within the annular space. The foam insulation cures to form a porous solid layer of insulation between the tank and jacket, and the foam insulation shrinks during curing. The foam insulation adheres to the inner surface of the jacket, and the foam insulation does not adhere to the plastic skin during curing, to thereby reduce a deforming load on a portion of the jacket opposite the plastic skin.
A.O. Smith Corporation | Date: 2015-06-09
A water heating system includes a tank, one or more heating elements mounted on the water heating system, and a first controller mounted on the tank. The first controller is coupled to the one or more heating elements and includes logic to activate and deactivate the heating elements according to a first threshold value. The water heater also includes a second controller that is selectively coupled to the first controller and configured to communicate the first threshold value to the first controller, and perform an additional function related to the operation of the water heater. The first controller is configured to receive the first threshold value from the second controller and control the one or more heating elements based on the received threshold value, and to control the one or more heating elements mounted on the water heating system in a physical absence of the second controller.
A. O. Smith Corporation | Date: 2015-11-12
A method of assembling multiple low NO_(x )burners including the step of assembling multiple bodies, each body including a multiple first burner ports connected to a first burner inlet and multiple second burner ports connected to a second burner inlet. The method also including the step of selecting one of the bodies and inserting a first inlet tube into the second burner inlet to provide a fuel/air mixture to the second burner ports at a first rate. The method also including the step of selecting one of the bodies and inserting a second inlet tube into the second burner inlet to provide the fuel/air mixture to the second burner ports at a second rate different than the first rate.
A. O. Smith Corporation | Date: 2015-09-03
A water heating system includes a first water heater having a first heating source of a first type, and a second water heater having a second heating source of a second type. The system further includes a valve having a first interface connected to the cold water source, a second interface connected to the first cold water inlet of the first water heater, a third interface connected to a second hot water outlet of the second water heater, and a fourth interface connected to the first hot water outlet of the first water heater. A motor positions the valve to one of at least three positions Finally, the system also includes a control circuit including a temperature sensor near the first hot water outlet of the first water heater, and a controller configured to control the motor based on a sensed temperature by the temperature sensor.
A. O. Smith Corporation | Date: 2016-05-26
A flame rod analysis system, methods for determining a condition of a flame and a flame rod, and circuits for determining a condition of a flame and a flame rod. The flame rod analysis system comprises energy storage connectable to a flame rod, a pulsed source connected to the energy storage and providing a voltage pulse or a current pulse, and a buffer to allow a processor to measure a buffered voltage at various time points. Flame rod analysis systems can distinguish between various flame conditions (no flame, low flame, etc.) while simultaneously characterizing the condition of the flame rod (shorted to ground, contaminated, etc.). Some flame rod analysis systems can directly measure the resistance of the flame rod.
A. O. Smith Corporation | Date: 2016-07-11
A water heater including a tank, first and second heating elements, first and second temperature sensors, a communication module, and a controller. The controller is operable to determine a first temperature value related to a first temperature sensed by the first temperature sensor, determine a second temperature value related to a second temperature sensed by the second temperature sensor, and receive a command from the external controller. When the received command is a first command, the controller control current to the first heating element based on the first temperature value traversing a first set point, and controls current to the second heating element based on the second temperature value traversing a second set point. When the received command is a second command, the controller controls current only to the first heating element and not the second heating element, the control being based on the first temperature value.
A. O. Smith Corporation | Date: 2016-07-06
A thermostatic condensing gas water heater, comprising a burner; a first heat exchanger (7), a second heat exchanger (4), a water inlet pipe (10), and a water outlet pipe (9) provided in succession along the flow direction of the burnt flue gas; a controller; and a water flow channel connecting the first heat exchanger (7) and the second heat exchanger (4) in parallel between the water inlet pipe (10) and the water outlet pipe (9), wherein flow control valves (3, 5) capable of adjusting the water flow distribution of the first heat exchanger (7) and the second heat exchanger (4) are provided on the water flow channel and controlled by the controller.