Volkswagen Marine SDI 55-5, Руководство пользователя

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Superior Technology
Seawater circuit
Drawn in by the seawater pump, the seawater
enters the system via the boat's hull. The
seawater filter filters the impurities out of the
incoming seawater.
The downstream combined cooler is a two-piece
assembly. It cools the fuel flowing back to the fuel
tank. On boats with power-assisted steering, the
other part cools the hydraulic oil in the steering
system as well as the gearbox oil on boats with a
reversing gearbox.
In the heat exchanger, the seawater absorbs the
heat of the coolant circuit and thus cools the
engine. The seawater outlet takes place in the
exhaust gas flow through the exhaust manifold
(wet exhaust).
Small coolant circuit
Driven by the coolant pump during the warm-up
phase, the coolant circuit passes through the
engine block, oil cooler, exhaust header and via
the bypass back to the coolant pump. This
ensures the engine quickly reaches its operating
temperature.
Large coolant circuit
Once the engine has reached its operating
temperature, the thermostat opens the "large
coolant circuit". The coolant now additionally
flows through the main heat exchanger where it
gives off the heat to the seawater.
Cooling system
Provided the engine is running, the
seawater always flows through the
main heat exchanger and the
exhaust manifold.
Seawater circuit
Small coolant circuit (freshwater)
Large coolant circuit (freshwater)
Bypass
Ventilation line