Technical Specifications - Atlas Filtri HYDRA Serie Handbuch Für Installation, Gebrauch Und Wartung

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TECHNICAL SPECIFICATIONS

HYDRA self-cleaning filters are designed and constructed with innovative technical solutions
concerning filter cartridge cleaning system efficiency by washing in counter-current to remove
more substances deposited on the cartridge outer surface.
The filter has a nominal filtration level of 90 micron in the RAH version with stainless steel net
cartridges and RLH version with plastic net cartridge, or 50 micron nominal filtration in the RSH
versions with pleated plastic net cartridges.
When the filtering element is clogged, it is simply cleaned by opening the valve on the bottom
of the bowl (see figure 1). This operation generates a depression in the filter that pushes the
cartridge down, automatically reversing the water flow from the inside (counter-current) to the
outside of the cartridge (see 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).
The HYDRA filter is provided with a drain funnel, a device designed to prevent pollution by
backflow, in accordance with European standard UNI EN 1717 of November 2002. This device
prevents backflow by making all elements downstream from the drain valve vent to atmosphere
(protection unit symbol: DC).
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 filter
for HYDRA or check the inlet manometer for HYDRA M.
General direction 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.
- Keep protected from water hammer with an anti-water hammer device (expansion vessel).
See Installation lay-out for applicable devices (Fig. C).
- Do not install near to electric appliances.
Installation guidelines
WARNING
- Before the installation, carefully lubricate the housing o-ring which is located at the bowl top.
Ask your vendor for original lubricant Lubrikit.
- 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 in different models.
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. Filtering unit of any model | 7. Other utilities
- Installation of manometers (on M models) and discharge kit:
* Manometers: apply some sealing tape to the thread of the manometers and screw them
on tightly, but without over-tightening, into the 1/8" threaded ports on the top of the head;
at product start-up, in case of leakage of water add some more sealing tape and/or screw
more tightly.
* Discharge kit: 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.
DRAIN CONNECTIONS TO THE WATER MAINS
Connect a rubber tube reinforced with canvas to the drain funnel or hose fitting at the base of
the filter, secure with a clamp and have it discharge into the drain (see figures 4 and 5). The
drain point must be lower than the drain funnel or hose fitting. The rubber tube reinforced with
canvas must not be more than 2 metres long.
WARNING: avoid bending or pinching the rubber tube reinforced with canvas: this could generate
counter-pressure against the drain with consequent malfunctions.
FILTER START-UP
As the installation of the filter and the connection of the rubber hose to the drainage are made,
proceed as follows:
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product. Please
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