DKG-109 User Manual V-27 (23.08.2013)
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It may be required that the engine runs at the idle speed for a programmed duration for engine
heating and cooldown. The idle operation duration is adjusted with the parameter Idle Speed Timer.
The idle speed will be set by the governor control unit of the engine.
Any of the spare relay outputs may be assigned as IDLE output using Relay Definition
program parameters. Also relays on an extension module may be assigned to this function.
The Idle speed operation is performed both in engine start-up and cool-down sequences.
Speed and voltage protections are disabled during idle speed operation.
The unit is able to provide a relay output in order to drive the block heater resistor.
The temperature reference is the coolant temperature measured from the the analog sender
input.
The block heater relay function may be assigned to spare relays using Relay Definition
program parameters. Also relays on an extension module may be assigned to this function.
The engine body temperature limit is adjusted using the parameter Engine Heating
Temperature. The same parameter is used for engine heating operation.
The relay will become active if the body temperature falls to 4 degrees below the limit set by
Engine Heating Temperature. It turns off when the body temperature exceeds Engine Heating
Temperature.
The unit is able to provide a relay output in order to drive the fuel pump motor. The fuel pump
is used in order to transfer fuel from the large capacity main tank (if exists) to the genset daily tank
which is generally integrated in the chassis and has a limited capacity.
The fuel level reference is measured through the analog fuel level sender. When the
measured fuel level falls below Fuel Pump Low Limit parameter, the fuel pump relay output will
operate. When the fuel level reaches Fuel Pump High Limit parameter, the relay will turn off. Thus
the chassis fuel tank level will be always kept between Fuel Pump Low Limit and Fuel Pump High
Limit parameters.
The fuel pump relay function may be assigned to spare relays using Relay Definition program
parameters. Also relays on an extension module may be assigned to this function.
6.4 Engine Idle Speed Operation
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