TECHNICAL INFORMATION
VENT VALVE INSTALLATION
Screw the vent valve into the pump.
Tighten the valve using a 10 mm hexagonal span-
ner.
CAUTION
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.
Do not overtighten the valve as this may damage
the thread on the pump.
Unscrew the threaded plug.
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87-900-851-01(A)