Instructions for the installation, use and maintenance of Tecnicomar watermaker
7-25
7.1.4
Prefilters maintenance
The prefilters require maintenance when :
The watermaker shows alarm for low pressure.
The low-pressure is 30% lower than with new filter cartridges (0.8 ... 1 bar).
The high pressure pump makes a strange noise.
The system starts up, but shuts down after few seconds.
The operating pressure does not stabilize.
Use only Tecnicomar replacement cartridges. It is advisable to keep on board a stock of replacement
filter cartridges (see maintenance kit, par. 7.6).
The cartridge replacement procedure is given below:
Shut down the unit and close the sea water
inlet.
Unscrew the filter sump B (30 micron -
BLUE) using the special wrench supplied, until
they come off (fig.8). Hold the sump from the
lower part.
Empty the sump and take out the filter
cartridge (part 1).
Clean the sump inside. USE NEUTRAL
DETERGENTS
(PH=7)
TO
PREVENT
DAMAGE TO THE SUMP.
Replace the filter cartridge and make sure
that the O-ring (part 3) is well setted and
lubricated (use silicon grease).
Reinstall the cup tightening it manually. DO
NOT
USE
THE
WRENCH
FOR
TIGHTENING !
Use the same steps for the C filter (5 micron
-IVORY).
To restart the system follow the same steps
of First start up procedure.
7.1.5
Carbon filter replacement
The activated carbon filter should be replaced at least once a year. Follow the steps given
in the previous paragraph.
Figure 8 - Prefilters
Figure 9 - Carbon filter
