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AO2040 -Fidas24 Ex Continuous gas analyzers

The following requirements and conditions must be adhered towhen installing the gas analyzer and the gas lines.
Installation site requirements
The unobstructed exchange of air with the environment mustbe possible around the gas analyzer. The gas analyzer mustnot be directly covered. The outlet and the pressurecompensation vent of the purging and monitoring unitFS870S may not be closed.
All of the plastic and elastomer components of the housingmust be protected against Uy radiation.

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Essential details：AO2040 -Fidas24 Ex Continuous gas analyzers

Installation
The following requirements and conditions must be adhered towhen installing the gas analyzer and the gas lines.
Installation site requirements
The unobstructed exchange of air with the environment mustbe possible around the gas analyzer. The gas analyzer mustnot be directly covered. The outlet and the pressurecompensation vent of the purging and monitoring unitFS870S may not be closed.
All of the plastic and elastomer components of the housingmust be protected against Uy radiation.
Requirements for models ll 3G /Gb and ll 2G/GbThe housing must be protected against brush discharges orelectrostatic charging; the housing may only be cleaned witha moist cloth.
Requirements for the Models ll 3D/Dc and ll 2D/DbDue to the risk of electrostatic charging of the paintedsurface of the housing, the gas analyzer A02040-Fidas24 Exmay not be installed in areas with an increased risk ofcharging (e.g.near filling systems).
Suitable measures must be taken for the blow-off vent (inertgas outlet) of the purging and monitoring unit Fs870s, inorder to prevent a zone elevation, due to dust being stirredup.
It is preferable to evacuate the ignition protection gas into adust-Ex free area.
The operator must install a suitable key switch, in order toconfirm that the interior of the housing is cleaned beforecommissioning,refer to connecting the key switch onpage 49.
The operator must ensure that the inside of the housing iscleaned of dust before the gas analyzer is switched on.The initial purging of the housing is not intended for thepurpose of cleaning the housing!

AO2040

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AO2040 -Fidas24 Ex Continuous gas analyzers

Connecting the combustion gas and the combustion air
supplyObserve the connection diagram when connecting thecombustion gas and the combustion air supply, refer toconnection diagram for the operational gases on page 30The combustion gas path in the gas analyzer must not beopened! The combustion gas path can become leaky as aresult! Escaping combustion gas can cause fires andexplosions, also outside the gas analyzer!Ifthe combustion gas path in the gas analyzer has beenopened nonetheless,it must be checked for leakage(refer to check the integrityof combustion gas path onpage 60),using a leak detector (leak rate
<1 x 10-4.hPa l/s), once it has been closed again.The leak tightness of the combustion gas supply line outsidethe gas analyzer as well as the combustion gas path in thegas analyzer must be checked regularly, refer to check the
integrity of combustion gas path on page 60.A shut-off valve must be installed in the combustion gassupply line to increase safety in the following operatingconditions,refer to Shut-off valve in the combustion gassupply line on page 23:
when shutting down the gas analyzer
in case of instrument air supply failure,
in case of a leak in the combustion gas path, inside thegas analyzer.This shut-off valve should be installed outside the analyzerhouse in the vicinity of the combustion gas supply (cylinderline).
Should the combustion gas supply to the analyzer modulenot shut off automatically in the event of an instrument airsupply failure, an alarm that is visible or audible to theoperator must be triggered,refer to “Diagnosis / errormessages” in the operating instruction.

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