Arca Flow 23013, Installation And Operating Manual

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WEKA_IOM_VLI_EN / 17.03.2020 13 / 31
9. Installation
Preparations for installing (point 8) the visual level indicator must be completed before installation.

If the data marked on the type plate (density, max. operating pressure, max. operating
temperature, connection dimensions, material, etc.), does not match the application, the visual
level indicator may display an incorrect level, and it may be damaged and pose a risk to people
and the environment. Make sure that the data marked on the type plate matches the application.

Unsuitable screws, nuts and seals may result in leaks and cause damage and may endanger
people and the environment. Only use components suited to the application.

For visual level indicators with weld sockets as process connections, only suitable (approved)
welding processes may be used. The same applies to the selection of filler materials.

Working on hot or pressurised visual level indicators may result in physical injuries, burns,
chemical burns or poisoning. Depressurise the tank and allow it to cool to the ambient
temperature before working on the visual level indicator. Wear suitable protective equipment
(gloves, face guard, possibly breathing apparatus).

The visual level indicator may only be used for the purposes recorded on the type plate and the
Ex label.

Falling parts (screws, floats, etc.) may create impact sparks and lead to an explosion in
potentially explosive atmospheres. Make sure that there isn’t a potentially explosive atmosphere
and that no parts are falling when working on the visual level indicator.

In the absence of equipotential bonding, static charges may build up, which may result in
sparking and lead to explosions. To equalise the potential, permanently connect the metallic
housing of the visual level indicator (float chamber) to the equipotential bonding conductor of the
system (tank).
Possible equipotential bonding connections:
-
Weld the weld sockets (process connection) to the tank
-
Connect the flanges (process connection) to the tank via at least two bolts.
-
If none of these are possible, set up an equipotential bonding conductor of at least 4mm²
via a clamp connection.
-
The connection points must be free of paint.
Also, the accessories, like magnet switches, transmitters, etc. must be connected to the potential
equalisation system.