Grid Heater - Mercedes-Benz OM 904 LA Operating Instructions Manual

Before commissioning
General information
Following the preglow time, which is de-
pendent on the ambient temperature
(maximum 20 seconds), the flame-start
system is activated and the flame-start
2
system indicator lamp goes out.
Once the engine has been started, the
flame-start system is supplied with fuel by
the fuel pump.
The flame-start system is only enabled if
the engine is started within 30 seconds of
the flame-start system indicator lamp go-
ing out.
i
If the flame-start system indicator lamp
does not go out after more than 20 sec-
onds, there is a malfunction in the
flame-start system.
i
For operation at low ambient tempera-
tures, see also the "Diesel fuels"
( page 59) and "Coolant"
( page 64) sections.
26

Grid heater*

The grid heater is a cold-start aid for low
ambient temperatures. A heating strip in-
tegrated in the intercooler charge pressure
pipe preheats the charge air. The starter
motor and battery are also protected as a
result of the shorter start-up time.
The tendency of the engine to emit white
smoke after it has been started is reduced
by a subsequent heating time of up to
180 seconds.
Grid heater