Burkert AC10, Operating Instructions Manual

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10
Specific conditions of use
5.2 Solenoid coil with cable outlet
The solenoid coil type AC10 is an electromagnetic valve actuator for
various Bürkert valves. As a so-called top-mounted coil, it is separated
100 % from the valve. The valve is a closed system even if the coil is
removed. The solenoid coil consists of:
• coil winding,
• coil housing (made from epoxy),
• electrical connection cable,
• bridge rectifier.
Alternating current or direct current control is possible.
The solenoid coil type AC10 is available in a range of ratings distributed
across 2 frame sizes. The interface between the coil and valve is iden-
tical for both frame sizes.
The coil is placed over the core guide tube of the valve and attached
with a nut. It is positively locked to prevent turning relative to the valve.
The electrical connection cable exits perpendicular to the coil axis.
The cable is permanently integrated in the coil. The union nut is not
designed to be removed.
An electrical contact is made between the metal components of the
valve and the coil at the interface between the coil and the valve. All
metal components must be grounded via the protective conductor in
the connection cable.
5.3 Solenoid coil with terminal box
The design of the solenoid coil is identical to the description under
“5.2”, however a terminal box is also installed here (see “Fig. 2”). A
connection set for additional potential equalisation is enclosed with
the terminal box; observe the specifications in chapter “8.2” .
6 SPECIFIC CONDITIONS OF USE
6.1 Avoiding build-up of electrostatic
charge
WARNING!
Risk of explosion due to electrostatic discharge.
In the event of a sudden discharge from electrostatically charged
devices or individuals, there is a risk of an explosion in the potentially
explosive atmosphere.
▶
Take suitable measures to ensure that no electrostatic dis-
charges can build up in the potentially explosive atmosphere .
▶
Do not use the device in areas where there are powerful charge-
generating processes, mechanical reaming and cutting processes,
the spraying of electrons (e.g. in the vicinity of electrostatic coating
equipment) as well as pneumatically conveyed dust.
▶
Clean the device surface by gently wiping it with a damp or
antistatic cloth only.
▶
Fluid housings made of brass must not be used in atmospheres
containing acetylene.
6.2 Block assembly
Valve blocks are preferably made up so that all units have the same
coil power consumption. If different coil power consumption values
are used in a single valve block, then the technical data for the
coil with the highest power rating must be used to determine the
temperature class. In this case the ambient temperature must be
no higher than +40 °C (+104 °F).
english
AC10