Installation Examples; Technical Data - Vetus VENT178 Instructions D'installation

Introduction
A VETUS Extractor Fan type VENT 178 is used for ventilating
the engine room.
WARNING
To prevent personal injury, always disconnect electrical
connections during installation and maintenance.
Never use the fan in a room if the ambient temperature
exceeds 70 degrees C (158 degrees F).
Operating instructions
The fan should be switched on for at least 4 minutes and the
room checked for the presence of any vapours before the
ship's engine is started.
Never switch on the fan when refuelling.

Installation examples

The fan can be fitted in a number of different situations.
Example 1
In this situation, the ship's engine gets its inlet air separately
(via a grille with plenum chamber). The fan is then used to
extract hot air from the engine room. this can be done while
the engine is running or stopped. See Drawing 1.
Example 2
Here, the ship's engine does NOT obtain its inlet air sepa­
rately. The engine room can only be ventilated by the fan
when the engine is stopped. See Drawing 2.
Always ensure that the ventilation openings are large enough,
and that the fan(s) has sufficient capacity. Improperly posi­
tioned ventilation openings and insufficient capacity fans
can lead to poor functioning of the ship's engine. Always
read the engine supplier's installation instructions.
N.B.: With a DIESEL engine, the air should preferably enter
the engine room low down, and be extracted as high up as
possible.
Important
With a PETROL engine, the air should enter from high up
in the engine room, and be extracted as low down as
possible, where it is most likely that vapour will collect.
This point should always be below the top of the engine
foundation. However, the duct opening should not be so
low that there is a risk of bilge water being sucked into
the fan.
Extractor fan type VENT 178
Installation
The fan should be positioned where water (sea water) cannot dam­
age the fan (electric motor).
Fit the fan on a bulkhead or floor, the mounting can be either hori­
zontal or vertical. The bulkhead or floor should be flat where the fan
is fitted.
Drill or saw a 182 mm (7 ∕ ") diameter hole in the floor or bulkhead.
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Using the fan as a guide, drill the holes for its fitting screws or bolts.
Fit the ventilator with 4 stainless steel bolts or screws, size M6 or
1/4". Tighten up the screws evenly, but not so tight that they split
the mounting flange.
Ventilation Duct
Use ventilation duct with an internal diameter of 178 mm (7"). This
ducting must conform to the following specifications:
­ Smooth on the inside
­ Resistant to a temperature of 70 degrees C
­ Resistant to oil water and fuel
­ Resistant to under and over­pressure
Keep the ventilation duct as short as possible, with as few bends as
possible and keep the bend radius as large as possible.
Fit the duct with a rotating motion to the duct connection. Fix the
ventilation duct with 2 stainless steel clamps per connection. A
ridge on the duct connector holds the duct in place and stops the
duct slipping off after fitting.
Fit a grille over the extractor opening when the fan does not
have a ventilation duct. This will prevent touching the revolving
fan blades.
Electrical Connection
Check that the ship's voltage is the same as the voltage stated on
the fan (12 or 24 Volt).
Connect the fan as shown in the wiring diagram. Orange is + (posi­
tive), black is ­ (negative). Fit an 8 Amp fuse (for 12 Volt) or 4 Amp
(for 24 Volt) in the + wire. Extend the connector wires if required.
The minimum core wire cross­ section is 1.5 mm
must be resistant to more than 70 degrees C Use insulated cable
shoes. A thermostat (5) can also be included in series with the
switch in the circuit.

Technical Data

Motor : 12 V or 24 V direct current
RPM : 4,000 RPM, nominal
Power : 50 Watt
Current consumption : 6 Amp for 12 V, 3 Amp for 24 V
Capacity : Max. 12 m
24 Volt
Fan housing : Aluminium
Fan blade : Polypropylene plastic, 6.5" diameter
Duct Connector : 178 mm (7") diameter
Weight : 2.4 kg (5.3 lbs)
Max. ambient temp. : 70 degrees C (158 degrees F)
This fan conforms to the requirements of the EEC­Guideline 89.336/
EEC (EMC)(EN 55014).
ENGLISH
Safety
2 , the insulation
3 /min (424 CFM) for 12 or
080104.03
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