Operation; Replacing The Valve Insert; Maintenance - BWT Diago HWS-A Einbau- Und Bedienungsanleitung

EN
When installing the pressure reducing valve, ta-
king note of the flow direction arrow on the valve
body.
The indicator for the back pressure setting (8)
is an approximate value. The pressure gauge (6)
shows the pressure precisely. During setting, a
draw-off tap after the pressure reducing valve
must be opened briefly several times and closed
again. When water is drawn off, the back pressu-
re drops temporarily. The back pressure must not
exceed 80% of the initial pressure of the hot water
safety valve (DIN EN 1988-200).

7. Operation

Change the back pressure, see Start up.
Backwashing should be carried out once a month
in order to prevent the settling of impurities on
the filter fabric (in case of severe pollution pos-
sibly more often). Before backwashing, provide a
collecting basin, if the flushing water connection
is not connected to the sewage system.
Backwashing
Turn rotary button (5) anticlockwise, until water
flows audibly and then close again. Check the fil-
ter for leaks.
The plastic parts may be cleaned only with a
soft, clamp cloth. Solvents or detergents must
not be used.

8. Replacing the valve insert

Close shut-off valves before and after the dome-
stic water station and relieve the pressure at both
sides.
Loosen the locking screw (10) and turn the rota-
ry button (9) in an anticlockwise direction up to
the stop. Screw off the spring hood (7) with a ring
spanner. Remove the valve insert and the sliding
ring.
Coat the O-rings of the new valve insert with si-
licone grease and insert the valve insert in the
body, at the same time ensuring the correct ins-
tallation of the O-rings. Insert the sliding ring and
screw on the locking screw. Adjust the pressure
reducing valve, as described under Startup.
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9. Maintenance

All technical equipment requires regular mainte-
nance. In accordance with DIN EN 806-5 this must
always be carried out by specialist personnel who
also replace the parts subject to wear and tear.
Maintenance must be carried out once a year, in
the case of communal units twice a year.
Qualified staff:
The product may only be installed, commissioned
and serviced by skilled personnel. Only trained
persons are allowed to operate and use it.
Trained person:
Has received instruction and studied the informa-
tion in this document concerning the tasks ent-
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rusted to him/her, and the possible risks in the
event of inappropriate behaviour.
Skilled personnel:
Based on the professional training received,
knowledge and experience, and knowledge of
the relevant definitions, is qualified to install the
product, to commission and to service it.