DURAG D-R 290, Руководство по эксплуатации

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5 | Installation
76 D-R 290
Alignment of the tube stubs
The axes of the welded-in pipes with adjustment flange must be carefully aligned to
each other during installation. The maximal permissible deviation from parallelism of
the flanges is ±1°.
HR Auxiliary tube
Fig. 5.9: Alignment of the tube stubs
Precise alignment of the tube stubs (and parallelism of the adjustment flanges) can be
achieved using an auxiliary tube ( Fig. 5.9 HR).
1. Insert a tube (outer diameter max. 58 mm) through the entire flue through the two
opposite openings in the duct so that it projects at both ends.
2. Slide the welded-in pipes (with the adjustment flange facing outwards) over the
projecting ends of the auxiliary tube.
3. Align the red dot to the top and position the welded-in pipe so that it projects
30 mm into the flue.
4. Keeping it in this position, weld the welded-in pipe with the adjustment flange to
the flue wall or fasten it by other means depending on the flue material and sur­
roundings of the measurement duct.
5. Pull the guide tube out.
The installed flanges are now aligned.
For measurement ducts in which alignment by means of a tube is not possible, an op­
tical (laser) adjustment device can be supplied (D-R 280-70).
Installation of the measuring head and reflector
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.
5.4.3
5.4.4