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Installation/Commissioning
DANGER
The electrical connection may only be made by trained expert staff!
Prior to any work on electrical components disconnect them from power supply.
NOTE
When the equipment is used in potentially explosive atmosphere chapter 0 „Intended
Applications" must be observed!
If the Bypass Level Indicator (BNA) is determined for use in potentially explosive
atmosphere, it must be checked whether the damper has been installed in the lower
flange. The BNA must be suitable for the intended use according to its nameplate.
DANGER
In ex areas, only equipment which is in conformity with ATEX may be used.
EN 60079-14 must be observed.
The BNA-EX must be integrated in the potential equalisation system via the tubing during
installation.
Metallic process connection parts have to be included in the local potential equalization.
The Bypass Level Indicator type BNA-S../..EX...MA....has to be installed and used in
such a way that electrostatic charging from operation, maintenance or cleaning is
excluded.
NOTE
Before further steps are taken the orderer must check whether the operating conditions agreed in
the order are still valid. The equipment must be suitable for the intended purpose. This applies in
particular to:
the pressure, temperature, medium characteristics
the classification according to the Pressure Equipment Directive
possible additional loads
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Mechanical installation
Bypass Level Indicators (BNA) are measuring devices. Perform all work on BNA with utmost care.
Check whether the Bypass Level Indicator (BNA) supplied is in conformity with your order
specification.
Check whether all parts are available and that the connection flanges of tank and indicator match.
The float has been packaged and attached to the outside of the Bypass Level Indicator (BNA).
Remove the bottom connection flange (1/10) from the BNA.
Insert the float into the BNA in such a way that the mark (Top) points up.
Attach the bottom connection flange with its gasket to the BNA.
Tighten all screws crosswise.
CAUTION
During erection of the Bypass Level Indicator (BNA) the float may be damaged by bumping.
Erect the Bypass Level Indicator (BNA) slowly and carefully.
CAUTION
Frozen fluids on or in the Bypass Level Indicator (BNA) may cause faults or total failure.
If no liquid process medium can be guaranteed at low outdoor temperatures (risk of fluid
freezing) the BNA must be protected against frost by suitable measures or emptied completely.
CAUTION
Thermal hazard from hot/cold surface of Bypass Level Indicator (BNA)
Do not touch the BNA with your bare hands. Wear protective gloves.
DANGER
Depressurize the system before carrying out any work on the Bypass Level Indicator (BNA)!
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