Judo PROFIMAT-PLUS JPF+-AT 3/4" User manual

Attention:
Carefully read through the instal-
lation and operating instructions
and safety information before
installing and putting the unit into
service.
These must always be issued to
the owner/user.
Installation and
operating instructions
JUDO PROFIMAT-PLUS ¾" - 2"
JUDO PROFIMAT DN 65 - 100
Automatic backwash protective filter
Valid for: EU countries and Switzerland
Language: English
Fig.: JPF-A DN 65 - 100
Fig.: JPF+-A ¾" - 1¼"
Fig.: JPF+-A 1½" - 2"

2 JUDO PROFIMAT-PLUS
Inquiries, orders, customer support
JUDO Wasseraufbereitung GmbH
P.O. Box 380
71351 Winnenden
Germany
e-mail: [email protected]
judo.eu
Address
JUDO Wasseraufbereitung GmbH
Hohreuschstraße 39 - 41
71364 Winnenden
Germany
Trademarks:
Trademarks used in this document are protected
and registered trademarks of the respective
holder.
© JUDO Wasseraufbereitung GmbH
71364 Winnenden
Germany
All rights reserved.
Reprints – even of extracts – is only permitted
with special approval.
Dear Customer,
we would like to thank you for your confi-
dence in us, which you have shown by
purchasing this device. The product you
have purchased is a filter developed
using state of the art technology.
This filter is suitable for use in cold
drinking water up to a maximum ambient
temperature of 30 °C (86 °F).
It removes coarse and fine-grained parti-
cles larger or equal in size to the filter
screen (strainer) mesh from the filter
through screen filtration.
Particles smaller than the screen mesh
size used, turbidities (i.e. substances
that make the water turbid) and
substances dissolved in the water
cannot be filtered out of the water.
Each unit is thoroughly checked before
delivery. Nevertheless, should difficul-
ties occur, please contact the respon-
sible customer service (see back page).

JUDO PROFIMAT-PLUS 3

4 JUDO PROFIMAT-PLUS
Table of contents
1. About this instruction manual.......... 5
1.1 Symbols used................................. 5
1.2 Safety information and dangers
due to non-compliance................... 6
1.3 Units used ...................................... 6
2. Intended use ...................................... 7
2.1 Water pressure............................... 8
2.2 Notes on special dangers............... 8
3. Product information .......................... 9
3.1 Intended purpose ........................... 9
3.2 Test marks ..................................... 9
3.3 Materials used................................ 9
4. Installation ....................................... 10
4.1 General ........................................ 10
4.2 Discharging backwash water ....... 12
5. Operation ......................................... 15
5.1 Commissioning............................. 15
5.2 Control lamps,
manual pushbuttons..................... 15
5.3 Differential pressure control ......... 16
5.4 Setting the backwashing
interval.......................................... 17
5.5 Functional description .................. 18
5.6 Backwashing................................ 20
5.7 Modifications / changes /
spare parts ................................... 21
5.8 Potential-free message ................ 21
5.9 Potential-free input ....................... 22
5.10 Integration of the filter in the
building control systems............... 23
5.11 Servicing / Repair......................... 23
5.12 Stoppages .................................... 23
6. Fault.................................................. 24
7. Maintenance..................................... 25
7.1 Cleaning....................................... 25
8. Warranty and services .................... 25
9. Data sheet ........................................ 26
9.1 Type ............................................. 26
9.2 Models.......................................... 26
9.3 Special designs ............................ 27
9.4 Technical data.............................. 27
9.5 Installation dimensions
JPF
+
-A ¾" - 2".............................. 29
9.6 Installation dimensions
JPF-A DN 65 - 100....................... 29
9.7 Connecting diagram for
filter control ...................................31
9.8 Connecting diagram for filter control
with potential-free relays ...............32
9.9 Extent of supply ............................33
9.10 Accessories...................................33
10. Spare parts....................................... 34
10.1 JPF
+
-A ¾" - 1¼" ...........................34
10.2 JPF
+
-A 1½" - 2" ............................37
10.3 JPF-A DN 65 - 100........................40
11. Customer service ............................ 44

JUDO PROFIMAT-PLUS 5
About this instruction manual
1. About this instruction
manual
ATTENTION
(see chapter “Safety information and
dangers due to non-compliance”)
The instruction manual must permanently
be available at the place where the filter is
used.
This instruction manual is intended to make
it easier to familiarize yourself with the filter
and its possible intended uses.
The instruction manual contains important
information in order to safely, properly and
economically run the filter.
It contains fundamental information, which
must be observed during installation, opera-
tion and maintenance. Observance of this
information helps to avoid dangers, reduce
repair costs and increase the reliability and
service life of the filter.
The instruction manual must be read and
used by each person entrusted with carrying
out work on the filter, for example:
–Installation
–Operation
– Maintenance
(servicing, inspection, repair)
Installation and maintenance may only be
carried out by personnel authorized by the
manufacturer, who are capable of fulfilling
the instructions given in the installation and
operating instructions and the country-
specific regulations.
Apart from the instruction manual and the
legally binding accident prevention provi-
sions applicable in the country and place of
use, the recognized technical regulations for
safe and proper work must also be
observed.
Therefore, this instruction manual must
always be read by the fitter and responsible
skilled personnel/owner or operator before
installation, putting into service and mainte-
nance.
Not only the general safety notes given in
the chapter “Intended use” are to be
observed, but also the special safety
notes in the other main chapters.
1.1 Symbols used
The safety notes contained in this instruction
manual are labelled with the following
symbols:
Notes directly attached to the automatic
backwash protective filter, e.g.
– Direction of flow (see fig. 1)
– Rating plate
– Cleaning information
must always be observed and kept in a fully
legible condition.
ATTENTION
Notes on existing
dangers
Warning, electrical voltage.
Torques specified by the
manufacturer.
Tips for use and other
information.
Fig. 1: Built-in rotary flange

6 JUDO PROFIMAT-PLUS
About this instruction manual
1.2 Safety information and dangers
due to non-compliance
In detail, failure to observe the general
danger symbols can result, for example, in
the following risks:
– Failure of important functions of the
automatic backwash protective filter.
– Danger to persons due to electrical and
mechanical effects.
– Danger to persons and the environment
due to leaks.
Refrain from any unsafe working methods.
Failure to comply with this instruction
manual and the safety information can not
only result in dangers for people but can
also harm the environment and the unit.
1.3 Units used
In derogation of the International System
of Units (SI = Système International
d’Unités), the following units are used:
Units Conversion
°F °F = 9/5 °C + 32
bar 1 bar = 105Pa = 0,1 N/mm2
¾" DN 20
1" DN 25
1¼" DN 32
1½" DN 40
2" DN 50

JUDO PROFIMAT-PLUS 7
Intended use
2. Intended use
The installation and operation of the auto-
matic backwash protective filter is subject to
the following existing national regulations.
In addition to the operating instructions and
the obliging regulations concerning accident
prevention that exist in the country of opera-
tion and the location of use, the established
technical regulations concerning safe and
professional work, should also be observed.
The water which is to be treated should
fulfil the requirements stipulated by
European drinking water directives!
It is absolutely essential that the manufac-
turer / supplier will be consulted prior to any
operation of the device using water of a
different quality, respectively with water that
contains additives.
This automatic backwash protective filter is
suitable for use in cold drinking water up to
a maximum ambient temperature of 30 °C
(86 °F).
The automatic backwash protective filter
has been developed and manufactured
using state of the art technology and the
established safety regulations in Germany.
The automatic backwash protective filter
may only be operated in accordance with the
manufacturer’s specifications. Any other
operation or operation beyond the specified
use, is not in accor
dance with the manufac-
turer’s specifications.
Additional dangers may result in the event of
the device not being operated in accordance
with the manufacturer’s specifications and
non-observance of the danger symbols or
safety instructions. The manufacturer /
supplier cannot be made liable for any
damages caused by these additional
dangers. The operator is responsible for
these risks.
The use of the device in accordance with the
customer’s specifications includes the
observance of the operating instructions.
The manufacturer/supplier should be con-
sulted prior to any operation of the automatic
backwash protective filter other than in the
operational areas stated in these operating
instructions.
The automatic backwash protective filter
may only be operated in a technically fault-
less condition, in accordance with the manu-
facturer’s specifications and the stated
safety and danger relevant instructions and
under observance of the operating instruc-
tions!
Any functional defects are to be removed
immediately!

8 JUDO PROFIMAT-PLUS
Intended use
2.1 Water pressure
The water pressure should be between
1.5 bar and 10 bar.
The water pressure must not drop below
1.5 bar as otherwise the backwashing can
be impaired! If the filter is not backwashed
regularly a pressure loss can result and this
can impair the filter function.
ATTENTION
(see chapter “Safety information and
dangers due to non-compliance”)
In the event of water pressure above
10 bar, the pressure reduction valve should
be fitted in front of the automatic backwash
protective filter (see fig. 2). If the operating
pressure is above 10 bar, this may result in
defects during operation.
2.2 Notes on special dangers
2.2.1 Electrical equipment /
installations
Electrical devices / equipment that are not
splash-water proof and are situated in the
direct vicinity of the filter may be damaged
by water leaking from the filter caused as a
result of the device not being operated in
accordance with the manufacturer’s specifi-
cations. In addition this may also result short
circuits if these electrical devices / equip-
ment being connected to the electrical
power supply. In the event of such cases
persons are at risk and may sustain elec-
trical shocks. Therefore any electrical
devices / equipment situated in the direct
vicinity should be splash-water proof,
respectively comply with the statutory
requirements for wet areas (IP44).
2.2.2 Potential-free input
2.2.3 Potential-free output
Switched voltage...........maximum 24 V
Current ............................ maximum 1 A
(see chapter “Potential-free message”)
Fig. 2: Pressure reducer upstream of the unit
The installation of a pressure
reduction valve is recommended
for water pressures between
5 bar and 10 bar.
1 = Pressure reducer
1
There must not be any electrical
cables and devices underneath or
in the immediate vicinity of the filter!
Only isolated switching contacts may
be connected to the potential-free
input.
No external voltage may be
impressed on the potential-free input!
Applicable safety requirements and
electrical regulations must be
observed without exception!
Only extra-low voltage may be
used for the remote transmission
of the fault message by means of
the isolated output!

JUDO PROFIMAT-PLUS 9
Product information
3. Product information
3.1 Intended purpose
This filter is suitable for use in cold drinking
water up to a water temperature of
maximum 30 °C (86 °F).
ATTENTION
(see chapter “Safety information and
dangers due to non-compliance”)
Please refer to the chapter on “Intended
use” for use restrictions.
This filter removes coarse and fine-grained
particles from the water which are larger
than or equal in size to the mesh size of the
filter.
3.2 Test marks
DIN-DVGW mark
The units conform to the technical regulations
for drinking water installations in accordance
with DIN EN 806 ff. and the national annex
DIN 1988 ff. and DIN EN 1717. They are tes-
ted by the DVGW (Deutsche Vereinigung des
Gas- und Wasserfaches e.V. – technical-sci-
entific association for the gas and water in-
dustries) in accordance with the requirements
of DIN EN 13443-1 for mechanical filters for
the use in drinking water and are entitled to
bear the DIN-DVGW mark.
3.3 Materials used
The materials used are resistant to the
physical, chemical, and corrosive loads to
be expected in the drinking water and fulfil
the requirements specified in DIN EN
13443-1 and DIN 19628 (“Mechanical filters
in drinking water installations”). All materials
are hygienically and physiologically safe.
Plastics fulfil the KTW guideline of the
German Federal Environmental Agency as
well as the DVGW working sheet W 270.
Metallic materials fulfil the requirements of
DIN 50930-6 (Impact on the drinking water
quality).
Particles smaller than the supplied
mesh size and impurities causing
turbidity cannot be filtered out of the
water.
Fig. 3: Test mark

10 JUDO PROFIMAT-PLUS
Installation
4. Installation
4.1 General
ATTENTION
(see chapter “Safety information and
dangers due to non-compliance”)
The unit may only be installed by skilled
personnel.
The chapter on “Intended use” must always
be observed!
The pipes must be able to safely support the
filter.
Otherwise mechanical damage or fractures/
bursts can occur in the pipes. This can result
in major water damage. People close to the
filter are exposed to a health risk due to the
large quantities of water released. There-
fore, if necessary, the pipes must be addi-
tionally fixed or supported.
For convenient operation and maintenance
it is absolutely necessary to ensure the
given spacings. A space of at least 100 mm
above and 200 mm below the filter should
be maintained. These distances are neces-
sary to be able to properly carry out the
backwashing (see chapter “Backwashing
water discharge options”).
4.1.1 Transport / storage
The automatic backwash protective filter
shall be protected towards heavy impacts.
4.1.2 Requirements for the place of
installation
The room where the unit is installed must
be dry and frost free!
Unauthorised persons must not have
access to the filter!
ATTENTION
(see chapter “Safety information and
dangers due to non-compliance”)
– The ambient temperature must not
exceed 30 °C (86 °F)! At higher tempera-
tures or direct sun radiation the material
can be damaged and the filter hood can
even break.
– In order to be able to safely discharge
the wastewater in operation and in case
of any defects that occur in the system,
precise compliance with the details
given in the “Installation” chapter is
necessary! If the wastewater (back-
washing) cannot be safely and
completely discharged, the house and
installations can be damaged by water.
– A shut-off valve must be installed
upstream of the filter! This enables the
water supply to the filter to be interrupted
during installation, servicing/mainte-
nance, repairs and in case of malfunc-
tions. Floods and serious water damage
to house installations can therefore be
avoided.
– The unit can be installed in all standard
drinking water pipes.
– It is not permitted to install the automatic
backwash protective filter upstream of
the water meter!
– A shock-proof plug above the filter with
constant electricity supply within a
distance of max. 1.5 m is required for the
mains adapter of the automatic filter
.

JUDO PROFIMAT-PLUS 11
Installation
4.1.3 Installation position
ATTENTION
(see chapter “Safety information and
dangers due to non-compliance”)
Always install the filter in a vertical position
(± 5°)! Failure to observe this can cause
uncontrolled backwashing water to escape
and can result in water damage.
4.1.4 Mounting the built-in rotary
flanges (JPF+-A ¾" - 2")
Install using the supplied built-in rotary
flange. The built-in rotary flange is used as a
connecting element between the pipe and
the filter.
It is suitable for both horizontal and vertical
pipes.
The built-in rotary flange must be
installed in the direction of flow. This is
marked by a cast-in arrow (see fig. 5).
Failure to comply with this means the filter
cannot work.
ATTENTION
(see chapter “Safety information and
dangers due to non-compliance”)
The flange surface of the built-in rotary
flange must be in a horizontal position! The
built-in rotary flange must be fitted so that
mechanical stresses cannot occur! Other-
wise mechanical damage can result in the
built-in rotary flange. Otherwise mechanical
damage can result, the pipe may burst or the
built-in rotary flange can break. This can
result in major water damage.
In this case, people close to the filter are
exposed to a health risk due to the large
quantities of water.
Therefore, during installation, ensure that no
large forces act on the pipe, built-in rotary
flange and filter.
4.1.5 Installing the automatic
backwash protective filter
JPF+-A ¾" - 2"
The built-in rotary flange for the filter is
supplied with bayonet drill holes. The neces-
sary seals and screws for this filter have
already been mounted.
Do not unscrew the screws!
– Insert the four flange screws in the
bayonet drill holes on the built-in rotary
flange (see fig. 4 I).
– Turn the filter in a clockwise direction as
far as it will go (see fig. 4 II).
– Tighten the four flange screws.
ATTENTION
(see chapter “Safety information and
dangers due to non-compliance”)
The section of the profiled flange gasket
must point towards the built-in rotary flange.
Failure to observe this can lead to leaks and
water escaping. This can in turn cause water
damage to the house and its installations
(see fig. 5).
Fig. 4: Built-in rotary flange with bayonet fixture
Select the torque (approx. 4 Nm)
so that the gasket closes and the
filter is not damaged or strained!
I
II

12 JUDO PROFIMAT-PLUS
Installation
Installation of filters of the nominal size 65 to
100 should be accomplished perpendicu-
larly only if there is no possibility for hori-
zontal installation. During operation in a
perpendicular conduit, the coarse particles
deposited in the sludge collector cannot be
as optimally rinsed as while operating hori-
zontally.
The filters of nominal sizes 65 to 100 have a
flange connection according to DIN 2633.
4.2 Discharging backwash water
ATTENTION
(see chapter “Safety information and
dangers due to non-compliance”)
For the backwashing water a wastewater
connection (for example a floor drainage) in
accordance with DIN 1986 must be in place.
The dimensioning depends on conditions on
site (e.g. wastewater pipe gradient, number
of pipe bends, length of the wastewater
pipe, etc.). The dimensioning must at least
allow all the wastewater to be discharged at
the same time.
If it is not possible to provide a wastewater
connection directly beneath the automatic
backwash protective filter, the flushing water
can be fed several metres to the next waste-
water connection, either through a hose or a
pipe to be fitted to the flushing water valve.
This pipe must have the same dimension as
the flushing water valve.
In all options, a free discharge must be
ensured in accordance with DIN EN 1717.
4.2.1 Instructions for safe use
To ensure a long life cycle of the filter and
sieve insert it is necessary that the back-
washing stream at pressures higher than
2 bar is throttled by means of a flush-cock.
Thus the screen cloth is prevented from
being damaged by too effected cleaning-up
streams. At the same time the flushing water
consumption is reduced and possible flow
noises are avoided.
Fig. 5: Built-in rotary flange
Profiled flange gasket
Ensure that the wastewater
connection functions before
plugging the power supply unit
into the socket.

JUDO PROFIMAT-PLUS 13
Installation
4.2.2 Backwashing water discharge options
JPF+-A ¾" - 1¼" JPF+-A 1½" - 2"
Fig. 6: Backwashing water discharge options
> 100 mm
(4 inch)
> 200 mm
(8 inch)
> 100 mm
(4 inch)
> 200 mm
(8 inch)
> 20 mm
(0.8 inch)
> 40 mm
(1.5 inch)
> 20 mm
(0.8 inch)
> 40 mm
(1.5 inch)

14 JUDO PROFIMAT-PLUS
Installation
When screwing in a pipe to drain the backwash water, make certain not to twist the flushing
valves. They are locked with gasket glue.
JPF-A 2½" - 4" JPF-A 2½" - 4"
Fig. 7: Backwashing water discharge options
> 100 mm
(4 inch)
> 200 mm
(8 inch)
> 40 mm
(1.5 inch)

JUDO PROFIMAT-PLUS 15
Operation
5. Operation
ATTENTION
(see chapter “Safety information and
dangers due to non-compliance”)
Imperatively observe the chapter “Intended
use”!
5.1 Commissioning
Before starting up (initial putting into service
or startup after maintenance work), fill the
filter with water and vent it!
– To this end, after installation the filter is
filled with water by opening the upstream
shut-off valve.
– The filter is now under mains pressure.
– The enclosed air must then be imme-
diately removed from the filter in order to
avoid damage to the installation caused
by water hammers. The filter is vented
by means of backwashing (see chapter
“Backwashing”).
– After backwashing and venting the filter
is ready for use.
5.2 Control lamps,
manual pushbuttons
Operation
Permanent green light: the automatic
backwash protective filter is ready for use.
Green light flashing: The filter is in rinsing
position while plugging in the power supply.
The LED “Operation” is blinking till the flush
valve is closed.
Flushing
Permanent yellow light: Backwashing is
taking place.
Yellow light flashing: Call for backwashing
when semi-automatic is set.
Fault
Red flashing light: The automatic back-
wash protective filter is not ready for use
(see chapter “Fault”).
Manual release
Push the manual pushbutton.
Triggers backwashing.
Indication of maintenance
All three control lamps flash at the same
time (see chapter “Warranty and services”).
Fig. 8: Control lamps, manual pushbuttons
Operation
Flushing
Fault
Manual release

16 JUDO PROFIMAT-PLUS
Operation
5.3 Differential pressure control
Mode of operation:
The impurities filtered off and caught on the
filter cloth cause an increased differential
pressure between the inlet and the outlet
of the filter at an adequate flow rate. The
differential pressure switch registers the
differential pressure prevailing on the filter. If
the differential pressure reaches the set
value,
the backwashing procedure will be
automati cally initiated.
The differential pressure switch is directly
flanged to the filter via intermediate flange.
Setting the differential pressure:
The selector shaft of the differential pres-
sure switch is set at the adjusting screw. The
value can be adjusted with a screwdriver
between 0.06 and 0.6 bar, see scale.
If the value is set too high, dirt may accumu-
late with low flow rate. During times of higher
water removal the differential pressure will
increase to an extent that damages at the
screen may occur.
Fig. 9: Differential pressure switch
cable for electric circuit
adjusting bolt for differential
pressure adjustment
connection inlet
pressure
connection outlet
pressure
Caution!
Scale unit in bar (1 bar = 14.5 psi / 100 kPa)

JUDO PROFIMAT-PLUS 17
Operation
5.4 Setting the backwashing
interval
ATTENTION
(see chapter “Safety information and
dangers due to non-compliance”)
– Loosen the four screws of the cover
hood and remove cover hood.
– Set backwashing interval via contacts 2
to 6 of DIP-switches S1, see tab. 1.
– For the setting only one contact may be
changed to the left.
– The circuit reacts with a continuous
signal to wrong settings (see chapter
“Fault”).
– Remount the cover hood and tighten it
by means of the four screws.
– The automatic backwash protective filter
is once more ready for operation after
the backwashing performance.
Pull off the power supply out of
the socket.
4
hours
8
hours
24
hours
1
week
1
month
Tab. 1: DIP switch S1
(factory setting: 1 week)
1 2 3 4 5 6 OPEN
1 2 3 4 5 6 OPEN
1 2 3 4 5 6 OPEN
1 2 3 4 5 6 OPEN
1 2 3 4 5 6 OPEN
Ensure that the wastewater
connection functions before
plugging the power supply
unit into the socket.
Manual start of backwashing perfor-
mance:
Push manual button. The backwash
interval is set back.
Selecting the backwashing intervals
Mesh size
mm (inch) Application cases Backwashing intervals1)
0.03 (0.001) Doctor's offices, laboratories,
photo labs 24 hours
0.10 (0.004) Domestic water installations in the
private and commercial field 1 week, 1 month
0.10 (0.004) and
0.32 (0.01)
Domestic water installations
Well water 24 hours, 1 week
0.32 (0.01) and
0.50 (0.02)
Industrial sector
Air condition systems 24 hours, 1 week
1) Depending on the dirt accumulation

18 JUDO PROFIMAT-PLUS
Operation
5.5 Functional description
The automatic backwash protective filter
removes all coarse- and fine-grained impuri-
ties. These impurities may cause pitting
corrosion as aeration elements in cold water
pipes and warm water supply systems,
leading to malfunction of fittings, control
units and sensitive devices.
In the automatic backwash protective filter,
the water flows outside-inside through a
cylindric screen insert. Impurities can be
seen through the filter hood. If the filter is
contaminated, it will be cleaned without
interruption of operation.

JUDO PROFIMAT-PLUS 19
Operation
Fig. 10: Functional description (e. g. JPF-ATP DN 65)
Operation
Flushing
Fault
Manual release
Fine filter
Transparent
filter hood
Connection
outlet pressure
Filtered water
Ball valve
Coarse particles to be flushed out of the
grit trap.
(blue handle) Ball valve
To be closed only in the case of failure. At a high
water pressure the water flow can be throttled.
(black handle)
Water inlet
Flush valve
Differential pressure
switch
Connection
inlet pressure

20 JUDO PROFIMAT-PLUS
Operation
5.6 Backwashing
The filter must be backwashed (= cleaned)
at the specified cycles in order to remove the
filtered dirt from the fine filter screen.
The cleaning-off is effected by means of the
point-rotation method:
Spiralled rotation of suction trunks around
the sieve cloth of the fine filter. These
progress upwards with each turn till the
entire sieve cloth will have been sucked off
once.
At the same time, the flushing valve at the
bottom of the filter opens and the backwash
water can exit. During this time, pure water
streams inside-outside passing through the
sieve surface into the suction trunks,
carrying away the adhering particles.
After reaching the upper limit-stop, the
flushing valve is closed again and the sieve
cloth of the fine filter is sucked off a second
time by the suction trunks. Repeat this
performance till reaching the lower limit-
stop. During this step, the suction trunks do
not only clean the sieve cloth of the fine filter
but also the transparent filter hood by means
of a rubber lip on its exterior (see fig. 10).
5.6.1 Backwashing interval
Unauthorized persons must not operate the
filter! Persons who operate the filter must
observe the operating instructions. Failure
to observe these instructions can result in
damage to property and personal injuries.
ATTENTION
(see chapter “Safety information and
dangers due to non-compliance”)
The smaller the mesh size of the screen
insert the more frequently backwashing has
to be carried out!
Experience shows that increased dirt is
deposited during the initial running period. If
so, the unit has to be flushed more often
than usual.
Failure to flush in good time can cause
damage to the screen. Larger quantities of
filtered particles can deform the screen and
as an extreme incident cause the tearing of
the sieve. As a result a filter function is not
any longer ensured. In addition, larger quan-
tities of dirt can cause mechanical impair-
ment concerning the backwashing function.
All filter sizes are backwashed with
treated water. The treated water
supply within the domestic installa-
tion is maintained throughout the
backwashing performance. During
the backwashing any wastewater
can't get into the pure water side.
The degree of pollution as well
as the cleaning off operation can
be watched from outside.