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NRGT 26-2n - Installation & Operating Manual -
850879-00
Installation
3.
If necessary, apply a small quantity of silicone grease (e.g. Molykote® III) to the electrode thread
H
.
4.
Screw the NRGT 26-2n level electrode into the tank standpipe or flange cover, and tighten securely
using a torque wrench (with size 41 open-ended spanner attachment).
Tighten to the torques stated below.
Tightening torque when cold:
■
NRGT 26-2n = 160 Nm
Installation example with dimensions, see Fig 9, page 27
Installing two level electrodes in a flange
A self-locking fixing nut connects the terminal box to the electrode. Before establishing the
electrical connection, you can therefore rotate the terminal box max. +/-180° (a half turn) in
the desired direction. This is often sufficient for alignment.
If, and only if, this option is not sufficient, completely disconnect the terminal box from the
electrode and mount it again later on, see the steps below.
ATTENTION
Incorrect installation can lead to malfunctions in the system or the level electrode.
The steps below must be carried out exclusively by the manufacturer’s service personnel or a
specialist expressly authorised by the manufacturer to perform this work.
Avoid open circuits or damaging terminals and a subsequent short circuit
■
When screwing the level electrode into or out of the standpipe, take care not to twist or trap
the connecting cables from the electrode to the terminal box!
■
Therefore, detach all connecting cables from the electrode to the terminal box before
unscrewing the level electrode from the standpipe.
