Maintenance Istructions For The Safety Valve (Water Block ® ) - W&H Dem 10 Manuel D'utilisation

MAINTENANCE ISTRUCTIONS FOR THE SAFETY VALVE
WATER BLOCK (WB) SAFETY VALVE
Indispensable device for washing machines, dishwashers and demineralizers as, under the conditions defined in the
technical features herewith described, it prevents a flow of water greater than the one for which it has been set by the
adjustment pointer. This avoids continuous leaking. The Water Block also has a special non-return valve (antipollution).
The device should be installed vertically (see fig. 2) and following the instructions
carefully.
TECHNICAL FEATURES
-
Burst pressure: 500 N/cm²
-
Max. static pressure: 100
-
Max. controllable volume: about 50 lt.
-
Min. operating capacity: 2 lt/min.
-
Max. operating capacity: 30 lt/min
-
Max. water temperature: 70° C
USER INSTRUCTIONS
WATER BLOCK should be installed between the tap and the supply hose of the demineralizer (fig. 2). Using the
enclosed plastic key, turn pointer 'P' (fig. 1) anticlockwise to the required setting (example, position 1,5).
CAUTION:
For use on other fixtures, set the pointer to a position suitable for that particular application, considering that each
number on the scale corresponds to a controlled volume of approx. 4-6 litres.
In case of installation on fixtures which foresee dispensing of drinking water for alimentary use it is advisable to let flow
at least 10 litres of water inside the device before the connection, so as remove eventual impurities collected during
storage.
INSTALLATION
1. Manually screw the WB to the tap having suitable thread (3/4" gas),
inserting the filter 'E' with its convex side facing upwards (fig. 2). The
WB will not operate properly if the filter is not installed correctly. If the
WB is tightened or loosened with the aid of a wrench, the same must
be applied to the appropriately octagonally shaped part of the housing
'A'.
2. Screw the supply hose 'C' to the lower end of the WB. If the supply
hose is equipped with a filter, the latter must be substituted by a flat
rubber washer 'F'. If the said hose has to be tightened or loosened with
the aid of a wrench, the same must be applied to the appropriately
octagonally shaped part of the WB housing 'B' so as to hold it firmly
while performing this operation.
If a failure occurs causing a continuous water leak, the WB will shut off
when the volume of water flowing through equals the amount to which it
was previously set with the pointer 'P'.
To reset the Water Block again after it has shut off, turn the tap off and
carry out the necessary repair work. Remove the supply hose 'C' from
the Water Block and press the coloured plunger 'H' which is located
inside the lower housing of the device itself (fig. 1). It may be difficult to
press this plunger if there is high pressure at the inlet side of the WB. In
this case, loosen the device from the tap: the plunger 'H' can then be
pressed with ease. Repeat the operation as described in the section
headed 'Installation'.
CAUTION:
To avoid any possible damage that may be caused by water freezing inside
the WB after its installation, the ambient temperature should never be below
2° C. We decline all responsibility deriving from the incorrect use of the WB
or from its use for applications and/or solutions not expressly foreseen by the
above instructions.
MAINTENANCE:
Depending on the conditions and frequency of usage of the water block, it is recommended to clean out the inlet filter 'E'
periodically and to replace the seal 'F'. We reserve the right to modify any features without prior notice.
16
(WATER BLOCK
N/cm²
®
)
Fig. 1
Dem 10