4
– MOUNTING AND INSTALLATION
COD: 100M12/24.B.2021
EN
THE PRESENT MANUAL BELONGS TO -
Schenker Italia
- ALL RIGHTS RESERVED
20
4.3.2
Seawater intake
Seacock with
through-hull
fitting
It is ideal a specific sea water intake,
size ¾’’
minimum in a central position, well under the water
surface even when the vessel is well heeled over.
The skin fitting is recommended. It must be oriented
to the bow of the vessel.
In case of high speed vessel (over 15 knot) it is
advised to make some holes on the backside of the
shape, in order to reduce dynamic prevalence during
navigation.
Size 3/4
”
Pre-existing
seacock
adapting
(alternatively)
As alternative, it is possible Tee into a pre-existent
water inlet as long as the following conditions are
met:
•
3/4
’’ minimum size
;
•
No air can be introduced into the system
from other use ie: salt water taps in galley;
•
Must always be under the water surface
even when the vessel is well heeled over.
•
Must be far from WC discharge.
CAUTION
Do not use the pre-existing water inlet of
the cooling system dedicated to the
motor.
Size 3/4
”
INSTALLATION NOTES
•
Allow a minimum 3/4
” on-off ball valve on the water intake.
•
The pipe connections, especially if under the seawater level, must be secured with double pipe clamps.
•
An easily inspected mesh type filter will be required close to the water intake. The filter has to be of
50 microns. It is possible to use filters from existing outlets.
•
The seawater intake must be at least 3/4
” size.
•
Downstream the seawater intake must be installed a strainer and a non-return valve. The water flow
inhaled by the watermaker is about 20 lit/min.
Mesh Filter
Strainer on
existing hull
(alternatively)
In case of seawater intake with pre-existing net
filter, it is possible to use it as long as the following
conditions are met:
•
Flow rate capacity of the filter is
adequate to the whole intakes it serves.
Filtration grade of the strainer is
50
mesh.
INSTALLATION NOTES
The filter has to be connected next to the through-hull fittings, and must be easily accessible
for inspection.
