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and then screw the gas purge valve (with a torque
of 2.5 Nm) as shown in the following figure.
VENT VALVE INSTALLATION
The vent valve mod. 969-9833 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 using
the supplied adapter.
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.
31
TECHNICAL INFORMATION
CAUTION
87-900-891-01(C)
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