Introduction to Water Heaters : 1.3 Water Heater Anatomy: Gas Fired Tankless

 

Vent System:

  • Vent Outlet: Located at the top, often with two openings—one for fresh air intake and the other for venting exhaust gases.

Heat Exchanger:

  • A coil-type heat exchanger where water spirals through, progressively heating up as indicated by color changes in the piping (blue to red).

Burner Compartment:

  • Burner: Controls heat generation.

  • Combustion Fan and Gas Inlet: Work together to adjust the firing rate based on demand.

Flow System:

  • Cold Water Inlet (blue pipe) and Hot Water Outlet (red pipe) on opposite sides.

  • Flow Sensor: Detects water flow and communicates with the onboard computer to adjust the burner’s firing rate based on demand.

  • Flow Control Valve: Regulates the water flow to maintain the correct outlet temperature.

Onboard Computer:

  • Manages all components and ensures balanced operation, adjusting the burner and flow control valve for optimal performance.


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