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How an Eberspächer HYDRONIC Water Heater Works

As soon as the heater receives its starting pulse, the following processes are triggered by the central control unit ¹⁾:

  • Automatic safety check.
  • The glow plug is warmed up.
  • The metering pump conveys fuel.
  • The burner motor starts smoothly.
  • The fan delivers combustion air.
  • Fuel-air mixture ignites (flame formation).
  • The hot combustion gases flow through the heat exchanger that delivers the heat to the coolant system of the vehicle's engine.
  • The heater is controlled electronically and works - according to heat requirement - in several power stages.

Technical Details

Click image to enlarge.

¹⁾ The actual scope of functions depends on the respective application. Please contact your workshop for further details.