Vetus VF4.140E, Руководство по установке

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400202.01 vetus®
Installation manual VF4 VF5
4.1.2 Intake air requirement
Engine compartments with natural draft ventilation must have vent openings of sufficient size and location to
accomplish the tasks previously outlined.
IMPORTANT: The size of ventilation openings must be increased if any auxiliary equipment is
located in the engine compartment.
The combustion air requirement (per engine) for the specified engines at wide open throttle are shown in the
table below:
Combustion Air Requirements (single engine)
Model Engine Air requirements at maximum speed
VF4 7 m 3 /min (250 cu.ft /min)
VF5 8.5 m 3 /min ( 300 cu.ft /min)
In order to guarantee the optimum engine temperature, 30 - 40°C (86 - 104°F), it is necessary to make sure that
the engine compartment ventilation meets the following requirements:
• Inlet (combustion air): the surface must not be lower than 230 cm 2 (35 sq.in.) (per engine). We recommend
that the air inlets are positioned in such a way as to favour a continuous air flow towards the engine’s air
filter.
• Hot air outlet: the surface must not be less than 100 cm 2 (16 sq.in.) per engine and the air outlets must be
positioned in the upper part of the engine compartment. Favourite the correct ventilation of turbocharger.
For all those applications that do not allow for these requirements to be fully met, it is required that the air inlets
must be connected directly from the outside of the engine compartment with an appropriate water system and
also we require that a ventilation system must be installed so that the hot air flow is forced from the engine com-
partment to the outside. All the components must meet the European Community standards and regulations.
WARNING
If the temperature at the engine air inlet exceeds 40°C (104°F), the engine may be seriously damaged.
4.1.3 Compartment temperature indications.
Too high an inlet air temperature lowers the engine performance. Engine compartment temperature shall not
exceed outside air temperature by more than 15 °C (59°F).
Since many factors influence engine compartment temperature, temperature measurements should always be
carried out.
Observe the following:
• The boat being tested shall be a standard production boat fitted as it would be for delivery to a dealer.
• Temperature test meter used shall be of the type that can be read without opening the engine cover.
• During the test, in Step 1., engine compartments are to remain closed. No outside air is to be forced into the
engine compartment during the test and the bilge blower should not be running.