Technical Specifications; Routine Maintenance - Atlas Filtri HYDRA DS Serie Manual De Instalación, Uso Y Mantenimiento

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Dear Customer,
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TECHNICAL SPECIFICATIONS

HYDRA DS self-cleaning filters were designed and constructed with innovative technical solutions con-
cerning filter cartridge cleaning system efficiency by washing in counter-current to remove more sub-
stances deposited on the cartridge surface.
The filter has a nominal filtration level of 90 micron in the RAH version with stainless steel net car-
tridges 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 operations generates a depression in the filter that pushes the cartridge down, automatically re-
versing water flow from the inside (counter-current) out of the cartridge (see figure 2).
This water flow in counter-current carries particles and substances deposited on the cartridge to the
drain.
Closing 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 (see figure 3).
The HYDRA DS filter features a drain funnel, which is a device designed to protect potable water in
water installations against pollution, to prevent pollution by backflow, in accordance with European
standard UNI EN 1717 of November 2002. This device prevents backflow by making all elements down-
stream from the solenoid 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.
WARNING: ONLY USE THE FILTER IN THE OPERATING CONDITIONS INDICATED ON THE STICKER ON
THE FILTER BOWL. IF HYDRAULIC SYSTEM PRESSURE EXCEEDS 8 BAR, A PRESSURE REDUCER MUST
BE INSTALLED. INSTALLATION OF AN ANTI-WATER HAMMER DEVICE TO PROTECT THE FILTER IS REC-
OMMENDED.
FAILURE TO MEET THE OPERATING CONDITIONS MAKES THE WARRANTY VOID.
INSTALLATION
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 (see figure 4).
Pressure gauges must be installed one before the filter, to read inlet pressure, and the
CONIC
other one after the filter, to read the outlet pressure.
Mount the filter on the wall using the support with screws (standard supply).
Connect the filter inlet and outlet connections (NB: outlet indicated by an arrow on
the head) only to pipes with BSP type connections (cylindrical, GAS type) as indi-
cated in the drawing.
WARNING: only use TEFLON strips to seal filter connections. Do not use other types
of sealing material or the warranty shall be null and void.
CYLINDRICAL(GAS)
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 5A and 5B). The drain point must be lower than the drain funnel or hose fit-
SEALANTS
ting. 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
PASTE
As the installation of the filter and the connection of the rubber hose to the drainage
are made, proceed as follows:
- by gradually opening water supply to the filter, make sure there are no water leak-
- gradually fill the filter to about full and then release air in the filter as following:
CANAPA
Now the filter is ready for proper functioning.
TEFLON TAPE
WARNINGS
Only use HYDRA DS self-cleaning filters to filter mains or well water and to filter sand and other large
impurities from water with pH levels between 6.5 and 8.5. Do not use the filter to filter lime. Do not
filter other liquids.
WARNING: HYDRA DS self-cleaning filters do not make water drinkable. Do not use the filtered water
as drinking water unless water quality is known. Altlas Filtri is not liable for improper HYDRA DS filter
use.

ROUTINE MAINTENANCE

Routine maintenance consists in cleaning the filter cartridge with back-wash in counter-current oper-
ation by opening the drain valve for 15/20 seconds. Back-wash in counter-current is performed as in-
dicated in the "TECHNICAL SPECIFICATIONS" section.
If the cartridge is not perfectly clean after washing, repeat the operation with the same procedure one
or more times until the desired cleanliness is reached. If acceptable cleanliness is not achieved for a
good filter operations, follow the extraordinary maintenance procedure as described here following.
Notes for a proper routine maintenance:
Note 1: carry-on the routine maintenance before the pressure difference between the two manometers
exceeds 1 BAR.
ing;
by opening the breather screw on the head of the filter, making sure all air is re-
leased and the filter comes completely filled with water, then tighten the breather
screw;