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TECHNICAL INFORMATION
VENT VALVE INSTALLATION
The vent valve mod. 969-9833 enables undesired
pump areation during a temporary power failure (5
sec maximum) to be avoided, and enables an
automatic vent operation.
Unscrew the threaded plug.
VENT DEVICE INSTALLATION
Screw the adapter (1) into the vent hole (2) of the
pump.
The vent device mod. 969-9831 allows to avoid
undesired pump aeration of the pump during a
temporary power failure (adjustable time up to 36
min.), and enables an automatic vent operation.
Fix the valve (3) to the adapter (1).
Unscrew and remove the threaded plug.
Tighten the valve using a 16 mm hexagonal span-
ner.
!
CAUTION
Do not overtighten the valve as this may damage
the thread on the pump.
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87-900-860-01(E)