DURAG D-R 290, Руководство по эксплуатации

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5 | Installation
84 D-R 290
Installation sequence for the measuring head and reflector (when
the D-SK 290 protective device is used)
The measuring head and reflector will be damaged if the purge air supply fails
If the purge air supply is not running, the measuring head and reflector within the duct
will be irreversibly damaged within a short time due to excessive heat and dust.
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It is absolutely essential that the measuring head and reflector are removed from
the measurement duct before the purge air is switched off!
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Under no circumstances allow the measuring head and reflector to remain in the
measurement duct if the purge air supply is not running.
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Ensure a reliable supply of purge air, even when the system is stopped.
For installation of the purge air blower see 5.8 Installation of the purge air unit [
}
101] .
WARNING Danger of burns due to hot surfaces!
Contact with hot components can cause serious burns.
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Suitable heat-resistant protective gear (such as face mask, safety gloves) must al­
ways be worn where any work is undertaken in the vicinity of hot components.
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Wherever possible, allow components to cool down to ambient temperature before
starting work.
Wherever possible, install or remove components only when the plant is shut down.
Before opening the duct access ports:
●
Make sure that no overpressure is present in the measurement duct.
●
Make sure that no toxic gases are present in the measurement duct.
If it is not possible to shut down the plant, and toxic gases, which may be at high tem­
perature or pressure, are present in the measurement duct:
WARNING Health hazard due to hot and/or toxic gases in the duct!
When a duct access port (such as a welded-in tube) is opened, pressurised gases
may escape.
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Always wear suitable protective equipment (such as a face mask, heat-resistant
gloves and clothing, protective breathing equipment).
▶
The applicable specifications safety regulations and the operating company work­
ing instructions for the plant must be complied with.
5.5.1