Maintenance; Routine Maintenance; Overtime Maintenance; Disposal - Carel WTS compact Manual Del Usuario

For a good operation of the reverse osmosis system, the working
conditions must be constantly monitored, in particular:
•
check that the concentrate of chlorine concentration in the feed water
is not too high (max. 0.2 ppm);
•
check that hardness and conductivity of the feed water range between
the limit values (indicated in par. 1.6);
•
check the inlet pressure and the charge loss due to the fi lter;
•
check the working pressure of the membranes: it should range
between the limit values (max. 10 bar);
•
check the conditions of pipes and connections, making sure that there
are no water leaks.
•
check the permeate water fl ow and the drain water fl ow; monitor the
recovery value;
•
check the conductivity of the feed water and that of the produced
water;
•
check the regular operation of the system overtime. It's important that
WTS works regularly. Too long stops aff ect durability and performances;
•
avoid any prolonged stagnation of water in the expansion vessel, drain,
rinse it and then refi ll it at regular intervals;
•
keep the equipment and the surrounding area properly clean
For all these operation, a monthly frequency is recommended.
It is recommended to note down the operations performed on a copy of
the model shown in chapter 7.

5.1 Routine maintenance

The routine maintenance is extremely important: otherwise, the WTS
operation might be impaired. In particular, a regular use and a regular
production of demineralized water should be ensured, with a suitable
frequency of fl ushing steps.
5.1.1 Replacement of the inlet fi lters
The inlet fi lter unit is formed by a single CBC charcoal fi lter in the
ROC025500N and ROC040500N units.
On the other hand, the ROC0605000 model is formed by two fi lters with
serial connection; the fi rst one is the CBC charcoal fi lter, while the second
one is a CPP micrometric fi lter.
These fi lters need a continuous monitoring and replacement, when
required.
Replacement of the CBC charcoal fi lter: the CBC charcoal fi lter is used to
abate the content of chlorine in the feed water. The presence of chlorine
in water might damage the membranes beyond repair. The charcoal
fi lter has a chemical operation, combining and absorbing all chlorine
molecules. Performance decay over time is normal. The CBC cartridge
should be replaced:
•
every four months if the content of chlorine in feed water is lower that
0.1 ppm.
•
every two months if the content of chlorine in feed water ranges
between 0.1 and 0.2 ppm.
Replacement of the 5 μm CPP micrometric fi lter: the CPP micrometric
fi lter retains the foreign particles over 5 μm. The fi lter has a mechanical
operation, making feed water pass through a fi ltering mesh. It is normal
for the fi lter to get clogged over time, making less water pass and
decreasing its pressure.
The replacement of the CPP cartridge is necessary when the system
supply pressure (after passing through the inlet cartridge fi lters) is lower
than 1 bar during standard operation (pressure shown in the pressure
gauge PI01).
5.1.2 Reset of the hour counter for the maintenance
interval
To display the production hours of the system, from the home screen
showing the system status, press ARROW DOWN, sequentially scrolling
through the templates, until reading the working hours of the system
(where one working hour corresponds to one decimal) and the count-
down of the hours before the next scheduled maintenance operation,
displayed by default every 240 operating hours (maintenance interval
that can be set through the menu "18B MAINTENANCE").

5. MAINTENANCE

The reset of the system hour counter (menu "13A HOUR COUNTER
RESET) is not recommended, unless exceptional circumstances occur
(e.g. replacement of the membranes).
The reset of the hour counter for maintenance (menu "13B MAINTENANCE
RESET") must be performed after the equipment has signalled the
maintenance alarm, meaning that an intervention on the system is
required.
The reset of the hour counter can be managed through the user interface,
in menu "13 RESET":
•
The display shows the fi rst template "13A HOUR COUNTER RESET".
•
The cursor default setting is NO (press OK to confi rm).
•
Press ARROW UP or DOWN, to change the setting to YES-NO.
•
Press "OK" to confi rm the selection.
•
Pressing again, the second template "13B MAINTENANCE RESET" is
displayed
•
The cursor default setting is NO (press OK to confi rm).
•
Press ARROW UP or DOWN, to change the setting to YES-NO.
•
Press "OK" to confi rm the selection.

5.2 Overtime maintenance

Overtime maintenance concerns repair or replacement of one or more
components: usually this type of intervention is not required, unless
exceptional circumstances occur.
5.2.1
Membranes have a natural decay over time, in particular:
•
yearly decrease of produced permeate: 7%
•
yearly increase of conductivity of the produced permeate: 10%
Membranes, after a longer or shorter period, depending on the features
and the volume of treated water, get clogged, thus reducing their
effi ciency.
The decay of membrane performance can depend on the following main
factors:
•
clogging due to precipitation of iron or sulphate and calcium carbonate
•
biological clogging
•
long interval between CBC charcoal fi lter replacement (resulting in
corrosion due to the presence of chlorine in the feed water)
The replacement is required when the following main parameters in the
system change (recorded at the same temperature of the feed water):
•
decrease of the produced water fl ow rate until reaching an insuffi cient
value for the application connected downstream of the osmosis
system;
•
too high increase of the conductivity of produced water until reaching
a too high value for the application connected downstream of the
system.

5.3 Disposal

Should you decide not to use the WTS system anymore, it must be
dismantled. This operation must be carried out according to the
regulations in force and with separate collection of the diff erent materials
inside (rubber, plastic, polyethylene, fi breglass, PVC, electronic circuits,
etc.).

5.4 Instructions for emergency situations

In case of fi re, use powder fi re extinguishers in compliance with the
regulations in force. Never use liquid fi re extinguishers.
Pay attention to combustion gases, as they can be extremely toxic.
17
Replacement of membranes
"osmosi inversa" +0300017IE rel. 1.4 - 05.04.2018
ENG