Instructions for the installation, use and maintenance of Tecnicomar watermaker
7-26
7.2
Extraordinary maintenance
7.2.1
Replacement of membrane modules.
Switch off the power supply.
Disconnect the low and high-pressure piping from the membrane containers (pressure vessels).
Unscrew the two bolts using an appropriate tool (see exploded view attached).
Press towards the inside of the membrane to take out the end-
plug.
Take out the membrane from the feed side (refer to the flow
direction arrow on the membrane container).
Use silicon grease to lubricate outer parts of the freshwater
collecting tube of the membrane and the O-rings.
Insert a new membrane taking care to respect the insertion
direction of the old one (fig.10), and especially the O-ring of the
membrane must always be on the feed side.
Assemble all components in the reverse order.
Restart the system without pressure and check if there are leaks.
7.2.2
Salinity and temperature sensors (M+M1)
Power off the system.
Unscrew completely the salinity and temperature sensors.
Clean the two electrodes with a fine-grain emery paper.
Reinstall the sensors after having applied new teflon band on the threads.
7.3
Long-period shut down procedure
7.3.1
In case of automatic pressure regulator device
If the system is not used for a long period of time, membranes may get seriously damaged by a bacteriological attack. If
the system must be out of operation for more than a week, the LONG-PERIOD SHUT DOWN procedure should be
performed. If the environment is very hot or humid, this procedure must be carried out when the watermaker is not used
for more than three days.
Referring to drawing 2 (washing/storage) follow the steps below:
Close the sea water inlet valve (A2).
Turn the selector
automatic/manual
located onto the motorized valve (I) in “manual” position (when the unit is
off).
Empty the prefilters (B and C) and wash them using a normal dish-washing detergent.
Reinstall the filter cartridges (Fig. 8).
Prepare a container (X) with 20 liters of fresh, non-chlorinated water or water produced by the watermaker.
Turn the manual
three-way valve
(T) in the FLUSHING position (T2) (drawing 3) and connect to the container (X)
with a piece of hose.
Start up only the low pressure pump by pressing F1 key for 4 seconds.
Feed the system with all the 20 liters of water, then stop it (do not let the system dry out).
Prepare the biocide solution (0.2%) by dissolving 40 grams of the "FL403 Tecnicomar Membrane Preservative" in
20 liters of fresh water produced by the watermaker.
Do not use chlorinated water.
Disconnect the BRINE (R) and the UNSAFE WATER lines from the sea discharge fitting (Y) and connect with the
container (X) in which the solution has been prepared.
Figure 10 - membrane feed and O-ring
