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UK
SELF-CLEANING FILTERS
1.
Technical specifications
The filter has a nominal filtration level of 90 micron , and it
features a drain funnel to prevent pollution by backflow, in
accordance with European standard UNI EN 1717.
When the filtering element is clogged, it is simply cleaned by
opening the valve on the bottom of the bowl (figure 1).
This operations generates a depression in the filter that pushes
the cartridge down, automatically reversing water flow from the
inside (counter-current) to the outside of the cartridge (figure 2).
This water flow in counter-current carries particles and
substances deposited on the cartridge to the drain.
After closing the valve, the initial pressure distribution is restored
and the internal spring returns the cartridge to its service
position (see figure 3).
WARNING
The above described operating modes and the back-wash
cleaning in counter-current occur in excellent conditions with
minimum 1.8 bar supply pressure. Make sure supply pressure
is not under this value, installing a manometer upstream the
self-cleaning filter.
WARNING
Only use the filter in the operating conditions indicated on the
sticker on the filter bowl.
If the sticker is tampered, damaged, not legible or missing,
applicable working conditions are:
•
Max pressure 8 bar
•
Max temperature 45°C
If hydraulic system pressure exceeds the working conditions,
install a pressure reducer. Install an anti-water hammer device
to protect the filter (figure C).
General directions for use
•
Use only for filtration of water with pH from 6.5 to 9.5.
•
In case of filtration of drinking water, do not use with unsafe
water or with water of unknown quality without adequate
disinfection before or after the filter.
•
Keep protected from light.
•
Keep protected from back-flows with a non-return valve.
•
Keep protected with a pressure-reducer device, if pressure
exceeds the working pressure indicated in the product
sticker.
•
Do not install near to electric appliances.
The descriptions and photographs contained in this product specification sheet are supplied by way of information only and are not binding. Watts Industries reserves the right to carry out
any technical and design improvements to its products without prior notice. Warranty: All sales and contracts for sale are expressly conditioned on the buyer's assent to Watts terms and
conditions found on its website at www.wattswater.eu. Watts hereby objects to any term, different from or additional to Watts terms, contained in any buyer communication in any form,
unless agreed to in a writing signed by an officer of Watts.
2.
Installation
WARNING
•
Before the installation, carefully lubricate the housing
o-ring which is located at the bowl top using the lubricant
provided with the filter.
•
Before the installation, check if the hydraulic system has
been set-up according to the rules-of-the art in force.
•
Install the products in sheltered rooms and protected from
freeze and excessive heat.
Refer to figures:
A Applicable sealant and applicable fittings (depending on
model).
B IN-OUT directions presentation and vent-valve (VV) location
C Installation lay-out:
1. Municipal water mains | 2. Non-return valve | 3. Pressure
reducer | 4. By-pass | 5. Anti-water hammer device (expansion
vessel) - check from the table for the appropriate device volume
(V) depending on piping diameter (Ø) | 6. Self-cleaning filter | 7.
Other utilities
Before installing the filter, it is strongly recommended the
installation of a by-pass and shut-off valve, while keeping both
the filter inlet and outlet closed.
•
Install a manometer before the filter, to read inlet pressure,
and an other one after the filter, to read the outlet pressure.
•
Screw the ball valve to the threaded port for discharge on
the bottom of the housing, making sure that the gasket
of the valve is in place, then screw the drain funnel or the
plastic hose-holder to the ball valve, making sure that the
gasket is in place.
•
Mount the self-cleaning filter on the wall using the support
with screws (standard supply). Use flexible tubes to
connect the filter to the pipes if necessary.
•
Connect the filter inlet and outlet connections only to pipes
with BSPP type connections (GAS type) as indicated in
the drawing.
WARNING
Only use sealing tape to seal filter connections.
Watts Water Technologies, Inc.
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