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1. Introduction
1.3 System description
The Modular system comprises of two separate units:
PUMP AND FILTER GROUP.
This unit picks-up the sea water up and sends it to the watermaker at pressure (about 6,5 –7,5
Bar). The pumps are fitted with a safety cut off switch, calibrated at about 9 Bar. The pressure
switch can be adjusted by an 2 mm. allen key. To make the allen
key adjustment to the pressure switch pictured, the cover to the
connector must be removed. This gives access to make an
adjustment by inserting the allen key without removing the
connector itself. Turning the allen key clockwise increases the
preset pressure, and turning anti clockwise decreases the preset
pressure. The movement required is very small.
(1/4 turn = 1 BAR).
This action will not be required in normal circumstances as the
unit has been pre calibrated at the factory. Before changing the settings please call a Schenker
Service Point. The grey box contains the power relays that activate the pumps electric motors.
The filter housing contains a 5 micron filter cartridge, and its job is to filter impurities that may
damage the watermaker unit. A red push-button is positioned on the top of the housing to purge
air from the pumps unit during start-up operations.
Close to the pump is installed an accumulator. It is constituted of a cylindrical recipient and has
the function to dampen the pumps pressure oscillations during the watermaker functioning. The
accumulator needs to be pre-charged of air through the apposite valve (similar to the common
tire valves) located on the left of the device. The air pressure shall be of 2,8 Bar. The
accumulator is charged in factory at the right pressure, but it is opportune to verify the pressure
level at the first start-up.
