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6.6
Engine pre-heater
This function is used to control the temperature of the engine before the engine starts. The function is only active when the
engine is stopped. A temperature sensor is used to activate an external heating system to keep the engine at a minimum
temperature.
43°C
37°C
Engine heater
relay
Start attempt
DG running
The functions includes a set point and a hysteresis. In the example, the set point is 40 °C with a hysteresis of 3 °C. The
controller opens the engine heater relay when the engine has reached 43 °C and closes when the engine temperature is 37
°C. You must select a relay for the engine heater. If the engine heater is active, and the manual control command has been
activated, the engine heater relay is opened. When the command is activated again, the heater relay closes if the
temperature is below the set point.
Configure the preheat function
1. Go to Analogue Inputs and then select Analogue Input 3.
2. Set the Use Input As to Engine Coolant Temperature Sensor.
3. Go to Outputs and select the source as Preheat Output.
4. Go to Engine and then select Preheat.
5. Configure the preheat parameters.
Engine > Preheat
Parameter
Pre-heat Timer
Engine Coolant
Temperature
User manual 4189341355A EN
Range
1 to 900 s
Enable
Disable
Default
10 s
Not enabled
Description
The pre-heat function deactives when this
timer expires.
If this parameter is enabled, the controller
deactivates the pre-heater function when
engine temperature is more than the set point
Page 77 of 92
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