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Nuvia_SelfCleaning-instructions.qxp_Layout 1 10/11/21 09:23 Pagina 5
- Turning-off the valve after a couple of seconds returns pressure distribution to its initial
conditions and the internal spring returns the cartridge to its service position (Fig. E2).
The filter features a drain funnel, which is a device designed to protect potable water
from pollution by backflow.
The above described operating modes and the back-wash cleaning in
counter-current occur in excellent conditions with minimum 26 psi (1.8 bar)
supply pressure.
Extraordinary maintenance
In time, extraordinary cartridge cleaning is required as follows:
- shut-off water flow upstream from the filter;
- release the filter pressure by opening a tap downstream the filter;
- open the filter by unscrewing the bowl from the head using the supplied spanner;
- remove the cartridge (wearing protective gloves to prevent scratches due to worn net);
- clean the cartridge under a jet of cold water and use a soft brush to remove impurities;
- insert the clean cartridge back in the bowl;
- screw the bowl onto the head;
- follow the above procedure "Start-up" to put the filter in service.
In case of persistent encrustations onto the filter net or if the pressure difference
between the two manometers remains above 1 BAR after cleaning the filter, replace
the filter cartridge with a new one.
Filter cartridges and the housing bowl have an average working life, for that reason
we recommend replacing plastic net cartridges at least every 24 months and
stainless steel net cartridge at least every 48 months. The housing bowl must be
replaced with a new one at least every 5 years.
Follow the local regulation in force when disposing cartridges and bowls.
Troubleshooting
MALFUNCTION
Water does not run
from faucets.
Unfiltered water
runs from faucets.
The cartridge
does not clean
during self-cleaning
operation.
After carrying out maintenance operations, run the tap
for at least 5 minutes before using the water.
CAUSE
- Cartridge clogged.
- Bowl broken.
- Cut-off valves and/or by-
pass closed.
- Cartridge broken.
- Spring broken.
- Cartridge gasket damaged.
- Insufficient pressure
in the bowl.
- Cartridge not correctly
positioned in the
bowl.
REMEDY
- Clean the cartridge following
the extraordinary
maintenance procedure.
- Replace the bowl and o-ring.
- Open the closed cut-off valve
or by-pass.
- Replace the cartridge.
- Replace the spring.
- Replace the cartridge gasket.
- Check the drain pipe: if
pinched or bent, remove
the problem.
- Rotate the cartridge
clockwise or counter-
clockwise so that it moves
vertically without strain in
the bowl.
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