How The Filters Work; Installation Conditions; Installation; Commissioning - BWT R1 Instructions De Montage Et D'utilisation

EN

3. How the filters work

The raw water flows through the raw water inlet into
the filter and, from there, through the filter element to
the clean water outlet. In this process, foreign par-
ticles > 90 μm are trapped on the inside of the filter
mesh and, depending on the weight or size, either
fall directly to the bottom of the filter element or adhe-
re to the filter mesh. The filter element can be cleaned
by backwashing at regular intervals.
Backwashing is carried out manually, and operates
using the tried-and-tested principle of backwashing
by suction (suction power backwashing system).
The filtration process also runs continuously during
backwashing, as c. 90 % of the filtration area is
always available for the filtration process (non-stop
filtration).
With R1 HWS (hot water system) only: The pressure
reducer keeps the back pressure fairly constant and
also when the inlet pressure fluctuates. An even, not
too high a pressure protects the fittings and applian-
ces throughout the entire domestic water installation.

4. Installation conditions

Local installation regulations, general guidelines
and technical data must be observed.
A minimum flushing volume of 3.5 m³ must be
available for backwashing downstream of the filter,
i.e. a pressure of at least 2 bar.
A waste water connection (drain) of at least DN 50
must be available.
The installation site must be frost-resistant, and ins-
tallers must ensure that the filter is protected against
solvent vapours, heating oil, detergents, all types
of chemicals, UV irradiation and heat sources over
40 °C.
Important: Keep all plastic parts away from oil and
grease, solvents, acid and basic cleaning agents.
Plastic parts should be replaced following extreme
shocks and impacts (e.g. from the use of unsuita-
ble tools, impacts on stone floors, etc.), even in the
absence of visible damage (risk of bursting). Avoid
extreme pressure surges.
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5. Installation

Install the filter in cold water pipes upstream of the
facilities that require protection (see installation dia-
gram), and always insert shut-off valves. The shut-off
valve positioned downstream of the pressure redu-
cer must also be fitted with a drain valve. Mount the
connection module on the cold water pipe horizon-
tally or vertically in the direction of flow (note the
direction of the flow arrow). Install the filter in ac-
cordance with the nominal width of cold water pipes
with the same dimensions, and install them upstream
of the facilities that require protection. Install shut-off
valves upstream and downstream of the filter.
Mount the connection fitting (2) on the pipe, and
install the filter on the cold water pipe horizontally or
vertically in the direction of flow (note the direction
of the flow arrow) (see installation diagram). Fit the
rinsing water connection with a hose to the drain or
collecting vessel (c. 10 litres).
Please note: The rinsing water hose must be installed
at least 20 mm from the highest waste water level in
accordance with DIN EN 1717 (free outlet).
Connection to the connection module ¾" - " :
5
/
4
1. Turn the retaining ring to the left to its full extent.
2. Press the clips of the appliance into the recesses.
3. And turn the device 45° clockwise to its full
extent.
4. Pull the retaining ring with both hands towards
the appliance until it clicks. The appliance will
now be secured against accidental twisting or
distortion. To release the filter, press the retaining
ring in the direction of the connection module.

6. Commissioning

Check the filter and rinsing water pipework to ensu-
re they are installed correctly.
The shut-off valves should remain closed at this point.
Check that the transparent inspection cylinder (3)
is fitted correctly and turn the rotary knob (5) in a
clockwise direction to close it. Slowly open the shut-
off valves upstream and downstream of the filter, and
bleed the pipe at the next tapping point downstream
of the filter. Place a collection vessel underneath the
pipe prior to backwashing, if the rinsing water con-
nection is not attached to the waste water connec-
tion. Turn the rotary handle (5) anticlockwise until a
discharge of water is clearly audible, and shut it off
again. Ensure that the filter is watertight.
BWT R1 HWS (hot water system) only:
The pressure reducer has a back-pressure factory set-
ting of 4 bar. To adjust the back pressure, release the
clamping screw (9) and turn the rotary knob (10).
Turn the adjusting knob to change the back pressure
(adjustment range 1.5 - 6 bar).
Turn clockwise to increase back pressure or antic-
lockwise to reduce back pressure.
Insert a pressure reducer and observe the direction
of the flow arrow on the housing!
The back pressure setting value displayed (8) serves
as a guide only. The exact pressure is indicated by
the pressure gauge (6). An outlet valve downstream
of the pressure reducer should be opened briefly
and closed again several times during the adjust-
ment process. The back pressure will drop tempora-
rily when water is extracted.
The back pressure must not exceed 80% of the re-
sponse pressure of the hot water safety valve (DIN
EN 1988-200).

7. Operation

Backwashing must be carried out every 6 months
to prevent a build-up of foreign particles in the filter
mesh (more frequently in the event of heavy conta-
mination).
Prior to the backwash, if the rinsing water connec-
tion is not connected to the waste water connection,
place a collection vessel underneath the pipe.
Backwashing
Turn the rotary handle (5) anticlockwise until a di-
scharge of water is clearly audible and shut it off
again. Ensure that the filter is watertight. The rotary
knob is equipped with a friction clutch. If the knob
is turned too far, a safety catch will snap over to
prevent damage to the locking system.
To clean plastic parts, use a damp, soft cloth only. Do
not use solvents, cleaning agents or acid cleaners!

8. Maintenance

Any technical installation requires regular mainte-
nance which, as specified by DIN EN 806-5, must
always be carried out by qualified personnel, who
will also replace any worn parts. Maintenance of
municipal installations should be carried out twice a
year by an installer or manufacturer.

9. Warranty

Should a fault occur during the warranty period, ple-
ase contact your contractor, the installation company
or BWT customer services, stating the device type
and the PNR (production number).
EN
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