8.16.10 Preheating unit
HotstartPreheating unit
1 Plastic cap (drain)
2 On/Off switch
3 Plastic cap (inlet)
4 Shut-off valve
5 Continuous flow heater
6 Vent valve
7 Thermostat
8 Circulating pump
Number of
cylinders
Rated voltage / frequency
Heating output kW
8 V
230 V / 50 Hz
9
400 V / 50 Hz
9
230 V / 60 Hz
9
440 V / 60 Hz
9
Function
The preheating unit heats up the engine coolant. The circulating pump (8) ensures the circulation of the pre-
heated coolant through the engine.
The flow heater (5) incorporates a heating element. When the coolant temperature has reached the value of
the thermostat setting (7), the thermostat switches off the preheating unit via contactors.
In the event of excessive coolant temperature, the temperature limiter of the thermostat (7) opens the con-
trol loop. The preheating unit is switched off.
The system is reset manually after the fault has been eliminated.
214 | Coolant Circuit, General, High-Temperature Circuit | MS15034/00E 2018-08
TIM-ID: 0000014748 - 006
Summary of Contents for 8V4000M*3 series
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