ENGLISH
15
As soon as the required bead height is reached evenly over the entire circumference at the
pipe ends, disengage the knurled handle, reduce the force to the corresponding preheating
force and screw up the knurled handle tightly again. It must be ensured that the workpiece
ends about evenly to the heating plate.
After the preheating time is over, disengage clamping lever move workpieces apart, swivel
out the heating element and move the workpiece ends together again. While doing this, in-
crease the corresponding joining force as linearly as possible until the nominal force is
reached (see the accompanying book for welding parameters) and pull the clamping lever.
The joining force must be maintained during the entire cooling period.
At the end of the cooling period, release the pressure via loosen the knurled handle and re-
lease the handle bar. Unclamp and take out the welded tube sections.
All welding parameters can be found in the enclosed welding tables.
3.2.4 Putting out of operation
Switch off heating element.
Unplug the heating element and trimmer unit.
Swivel trimmer and heating element into the space between the main clamps and unscrew
the handle bars.
Wind up flex.
The hotplate must be cooled off!
Put the machine with upper part of the transport box from the base of transport box, the
base put over the machine, and close the locks.
3.3
General requirements
As weather and ambient conditions can seriously effect welding procedures and joints, it is es-
sential to duly observe national welding guidelines and ordinances, e. g. DVS Guideline 2207,
Sections 1, 11 and 15.
Welding requires continuous and due supervision and monitoring!
3.4
Important information on welding parameters
For welding parameters such as temperature, pressure and time, consult your national welding
guidelines and ordinances, e. g. DVS Guideline 2207, Sections 1, 11 and 15.
Ordering: DVS Media GmbH, Aachener Str. 172, 40223 Düsseldorf
Postfach 10 19 65, 40010 Düsseldorf, Tel.: +49 (0) 211 / 15 91
– 0
Email: media@dvs-hg.de internet: www.dvs-media.info
In the event of doubt, consult the pipe manufacturer for material-specific welding parameters.
The welding parameters specified in the welding tables are strictly reference values. ROTHEN-
BERGER cannot assume any liability for their accuracy or completeness!
4
Care and maintenance
To ensure that the welding machine functions properly, observe the following maintenance rec-
ommendations:
The guide rails must be kept free of dirt. When their surface is damaged, the guide rails
must be exchanged.
The electric drives of the trimmer and heating element must be operated only with the volt-
age stated on the type plate.
To achieve perfect welding results, it is essential to keep the heating plate clean. If the sur-
face is damaged or shows signs of erosion, the surface must be recoated or replaced. Mate-
rial residues on the heating plate surface reduces the non-sticking properties of the coating.
Remove all residues with non-linting paper and alcohol (heating plate must be cool!).
The trimmer is equipped with two double-sided ground knives. When cutting capacity starts
decreasing, the knives can be turned over or replaced by new ones.
Summary of Contents for ROWELD P 250 A
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