Vetus STERN250P Instructions D'installation page 4

Introduction
Vetus 'bow thruster' of the '160 kgf' model can be installed eas-
ily as a 'stern thruster' by using this installation set (flange and
thrust tunnel to match).
Due to the special flange the electric motor will be inside the
vessel. By doing so a reliable protection against influences from
the outside is guaranteed. Also the electric motor is good ser-
viceble.
By application of the thrust tunnel is achieved that:
• The propeller is shielded so the risk of inflict of damage
and/or injury is highly diminished.
• The flow of the water is optimized so a high thrust will be
obtained.
This installation instruction explains only that part of the instal-
lation that differs from the installation instruction going with the
bow thruster '160 kgf' model.
So consult for the installation of the entire stern thruster also the
relevant bow thruster instruction.
Operation
For operation of the stern thruster consult the owners manual of
the installed bow thruster.
ATTENTION
Never use the stern thruster as boarding step!
By stepping on to the thrust tunnel damage to both the
propeller and the thrust tunnel can be inflicted. The oper-
ation of the stern thruster can adversely be affected and
the seal between flange and ship's hull can start leaking.
Maintenance
The (bronze) flange is protected against corrosion by means of
two zinc anodes; check during docking the zinc anodes and
replace if necessary.
The (plastic) thrust tunnel requires no maintenance.
Installation
For overall dimensions see page 15.
General
The reliability of the stern thruster is entirely dependent on the
quality of the installation. Nearly all problems are caused by
faults or inaccuracies which occur during the installation. It is
therefore of utmost importance to follow and check the points
mentioned in this manual.
4
2.0535
Positioning of the stern thruster
When choosing the location for the stern thruster take in
account that for an optimum result the centerline of the thrust
tunnel must be at least 250 mm below the the waterline.
The electric motor must always be well clear from the maximum
bilge water level ( ☛ ➀ ).
It is possible to install the flange into a hull with a maximum
thickness of up to 38 mm.
The stern must be level.
Otherwise it must be filled
out with a spacer. Note
that the total thickness
must be less or equal than
the maximum allowable
thickness of the stern.
In case that the available
height at the stern is insuf-
ficient for the installation of
the stern thruster a sloped
surface can be made to
install the stern thruster.
Than keep in mind that the
thrust tunnel must be pro-
tected against the forces
caused by the water flow
during normal cruising.
Installation in the bottom
of the vessel is not recom-
mended. The thrust tunnel
is not designed to with-
stand the forces of the
water flow during normal
cruising. At the same time
also the normal propulsion
is highly slowed down.
Installation set for stern thruster '160 kgf'