3
– PRODUCT PRESENTATION
COD.
35M12/24.D.2018
EN
THE PRESENT MANUAL BELONGS TO -
Schenker Italia
- ALL RIGHTS RESERVED
17
Reverse osmosis membranes
, are installed inside the glass fibre high-pressure housing. Membranes are
n.2 x SW2521 type. Their purpose is to separate the intake high-pressure seawater in two flows: one for the
salt-water drain and one for the fresh water production.
Energy Recovery System It is the black, carbon fibre unit. It has the function to amplify the pressure supplied
by the pumps and to recoup the hydraulic energy back from the membranes. The ERS device makes periodic
cycling by a hydraulically controlled automatic valve. The cycles are noticeable through a
”beat” issued
periodically by the watermaker unit. The unit is based on cylinders and a central body containing the hydraulic
valve necessary for the system functioning.
Manometers.
It is located on the front panel of the watermaker, and it measures the working pressure of the
watermaker.
Flowmeter.
It is located on the front panel, and it measures the fresh water instantaneous capacity sent to the
tank. The device accuracy is +/- 20%.
Pulsation dampener is a black plastic cylinder, installed in the pump group. Its function is to reduce and
stabilize the pressure peaks during the watermaker functioning. The device has to be pre-charged with air
through the specific valve. The air pressure precharge is about 4 Bar. The pressure dimmer is charged in
factory at the right pressure.
Depressurization valve.
It is used for the air bleeding of the unit. It is recognizable by a blue lever and it is
located on the right fitting of the second membrane. Its function is to depressurize the system and to allow the
bleeding of air. The valve must be closed during normal working conditions (vertical position), and it is opened
during the air bleeding operations (horizontal position).
Positioner.
It is a stainless steel threaded arm, with a black knob, located on the right side of the watermaker.
Its function is to reset the unit in case of hydraulic block.
Reset valve.
It is installed next to the watermaker right front corner and it is recognizable by the little blue
plastic lever. The valve must be closed during normal functioning (lever perpendicular to the valve). Such valve
has the function to allow the reset of the ERS in case of a system block. It must be opened before acting on
the valve positioner.
High pressure switch.
It Is hydraulically connected with the pump group. It stops the system if the pump
pressure exceeds 9,5 bar. In this case a high-pressure alarm is activated on the control panel.
Probe (pressure switch).
It is a device, hydraulically connected to the left side on the main valve of the Energy
Recovery System. Its function is check that the cycling of the machine is correct. It is set at 1,3 bar.
Computer box. It is an external unit. It has to be installed relatively close to the watermaker, in a position
protected from water. It is connected to the remote panel and controls the functions of the watermaker
automatically.
The microswitches P1and EV allow the direct command of the pump the electrovalve respectively. They can
be used, as an emergency solution, for starting the watermaker in case of total failure of the electronic
computer. In normal condition they have to be switched off
.
