SYR Drufi+ max DFR, Instructions For Use Manual

Page: 5 / 16

5
Field of application
English
The SYR backwash filters Drufi+ max FR
conforming with the European standard EN
13443, part 1 (with pressure reducing valve
DFR also complying with EN 1567) are valves
designed for potable water installations (DIN
1988).
The filters are also suitable for self-supply
water systems!
The FR type is a backwash filter with a stainless
steel filter element.
All backwash models include a stainless steel
filter element (lower mesh width 90µm, upper
mesh width 125µm), a tundish, a flange seal,
hexagon socket screws for the flange assembly,
a mounting wrench and a service ring indicating
when filter maintenance is due.
The DFR type also includes a pressure
reducing valve with an adjustment range from
1.5 to 6 bar. The outlet pressure is factory
set to 4 bar. It is equipped with an external
adjustment knob for individual pressure
setting and an 0-10 bar outlet pressure gauge.
All materials used are state-of-the-art. The
synthetic and elastomeric parts in contact with
potable water are approved by the German
Public Health Office (KTW).
Design
Installation
Observe the direction of flow when
installing the device!
An arrow on the flange indicates the correct
direction of flow. The product can be installed
both in vertical and horizontal pipes. All filters
should be mounted with the main axis in
vertical position.
However, the horizontal position is possible
as well.
Pull the filters pressure-tight by means of the
hexagon socket screws and make sure that
the flange seal is in correct position.
Caution: Pull the hexagon socket screws
pressure-tight crosswise!
When connecting the tundish to a HT pipe,
do not apply stresses.
How to set the outlet pressure
The pressure reducer in the Drufi+ max DFR
is factory set to 4 bar and can be adjusted in
a range from 1.5 to 6 bar as follows:
Make sure that the inlet pressure is at
least one bar higher than the desired outlet
pressure.
Turn the knob clockwise up to the stop
(direction „-“). Open and close a proximate
draw-off point for depressurization.
Watch the manometer and turn the knob
anticlockwise (direction „+“) until reaching the
desired outlet pressure (fig. 1).
Backwashing
The filters have to be backwashed in the
event of a reduced flow rate, but every six
months at the latest (as set in DIN EN 806,
part 5), in order ensure perfect functionality.
Prior to backwashing, connect the tundish of
the DFR /FR filters to a drain line (for instance
DN 50 HT-sleeve).
As an alternative solution, you may also place
an appropriate receptacle below the filter.
Caution: The drain pipe must be able to
collect the drain quantity.
The receptacle shall not be higher than
the tundish’s lower edge.
The backwash process can also be started
with an automatic backwash system (order
number: 2316.00.081).
A connection to a drain line is mandatory
when using the automatic backwash system.