2.5.2
Pressure reducing valve unit
An annual inspection/maintenance accor-
ding to DIN EN 806-5 has to be done by the
operator/the installer. To avoid malfunction
caused by dirt and attrition, the device
should be maintained on a regular basis. The
periods for the maintenance depend on the
operating conditions. Close the closing de-
vices before and after the DMF combination.
By means of the supplied key loosen the
hexagon socket screws at the valve casing
and remove the DM cartridge with the casing
upwards from the intermediate flange. Take
out the screen and functional elements and
clean them with cold and clear water. If there
are failures during operation, it would be
necessary to replace the pressure reducing
valve cartridge. After the cleaning is finished
reassemble the DM cartridge with the casing
by means of the hexagon socket screws
with the intermediate module again. Open
the closing valve before and after the DMF
combination again.
Household water connection mounting situation
2.6
Fig. 713 0G
(A) Back-flush indicator
(B) Operating button
(C) Filter lower part
(D) Discharge valve
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