26
NRG 26-61 - Installation & Operating Manual -
819874-00
Installation
DANGER
Danger to life from scalding caused by escaping hot steam.
Hot steam or water can escape suddenly if the level electrode is unscrewed under pressure.
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Reduce the boiler pressure to 0 bar and check the pressure before unscrewing the level
electrode.
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Only remove the level electrode at a boiler pressure of 0 bar.
WARNING
The hot level electrode can cause severe burns.
The level electrode becomes very hot during operation.
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Always let the level electrode cool down before performing installation and maintenance
work.
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Only remove the level electrode after it has cooled down.
ATTENTION
Incorrect installation can lead to malfunctions in the plant or the level electrode.
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Inspect the sealing surfaces of the tank threaded standpipe or flange cover to ensure they
are perfectly machined, see Fig. 9.
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Take care not to bend the level electrode during installation!
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Do not subject the electrode rod to hard impacts.
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The level electrode may be inclined at 45° only when being used in a two-hole flange, with
the length of the electrode rod limited to 688 mm maximum, see Fig. 15.
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Do
not
install the body
A
or upper part of the cover tube
F
of the level electrode in the
boiler thermal insulation!
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Do not install in the screwed socket.
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Pay attention to the minimum clearances when installing the level electrode, see installation
examples Fig. 11 to Fig. 15.
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To prevent current leaks, maintain a minimum distance of 14 mm between the electrode
and earth (flange or tank wall).
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Check the boiler coupling and flange during the preliminary boiler inspection.
