VENT VALVE INSTALLATION
The vent valve mod. 969-9843 allows to avoid un-
desired venting of the pump during a temporary
power failure (5 sec maximum), and enables an
automatic vent operation.
Unscrew the threaded plug (see figure below).
Screw the vent valve into the pump without insert-
ing the supplied adapter between the valve and
the pump.
Tighten the valve using a 16 mm. hexagonal span-
ner with a torque of 2.5 Nm.
Do not overtighten the valve as this may damage
the thread on the pump.
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TECHNICAL INFORMATION
CAUTION
87-900-915-01(E)