How an Espar HYDRONIC Coolant Heater works

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

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.

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