Measures For Preparing Welding - Rothenberger ROWELD P 250 A Bedienungsanleitung

Heating is displayed on the hand grip by the yellow diode. Horizontal bars also appear on the
temperature indicator. The yellow diode goes out shortly before reaching the set nominal tem-
perature (tolerance +/-3°C / 5.4°F) and the green one lights up. The heating element is usable
after a further 10 minutes. Note: upon first reaching the nominal temperature the set value can
be exceeded for short time.
Check the temperature using an external temperature measuring instrument. If there are devia-
tions it means that the heating element must be re-calibrated: press the "+" and "-" button simul-
taneously and then set the difference using the "+" or "-" button.
If "Er1" appears this means the electronics are defective. For "Er2" the resistance thermometer
is either defective or not connected. Send the device to an authorized ROTHENBERGER spe-
cialist workshop.
Very hot – Do not touch! The heating element can reach a temperature of approx.
290°C / 554°F!
3.2.2

Measures for preparing welding

 Loosen fixing handle at main clamp set and swivel away to the front. Move upper main
clamps up and backwards.
 For pipes which are smaller than the maximum diameter of 160 / 250 mm to be welded the
adaptor clamping inserts of the corresponding diameter are to be inserted in the clamps.
Supports bracket inserts are to be inserted in the support brackets and fastened with the
knurled screws.
 Insert the plastic pipes or fittings to be welded into the clamps. Put the support brackets un-
der the pipe or fitting (loosen cylinder head screw or star handle), and move the support
bracket accordingly and turn if required.
 Close top clamp, swivel in fixing handle, align pipe or fitting and tighten by means of the fix-
ing handle.
 Check whether the workpieces are tight in the clamping tool by moving the workpieces to-
gether.
 Also check whether the heating element has reached operating temperature. Heating is
ended when the yellow diode goes off and the green diode lights.
To guarantee even distribution of heat over the entire surface of the heating plate, it is
required to wait a period of approx. 10 minutes after the green diode lights up (according
to DVS). You must check the temperature with an appropriate temperature measurement
device!
 Swivel the electric trimmer between the pipe sections to be welded and switch on by press-
ing the switch in the handle.
Risk of injury! Do not grasp into the running knife while the trimmer is put into operation.
Operate trimmer only in swivelled in state (work position) and swivel back again after-
wards. The operativeness of the safety switch in the trimmer must be guaranteed at all
times to prevent unintentional starting outside the work position!
 With the handle bar move the ends of the workpieces carefully against the rotating knives of
the trimmer disks.
An excessively high milling pressure can lead to overheating and damage to the miller
drive. When the milling drive is overloaded or at rest, raise the machine and reduce the
pressure!
If in case of different quality of pipe ends, a workpiece end is not to be machined, turn the block-
er for the single edge trimming (upper side of trimmer) to this side; which is not to be machined.
 After the front sides are trimmed flat, which can be recognized by a uniform and unbroken
chip, slowly move the pipes ends apart. Unlock the trimmer by pulling out the ring and swivel
it out.
 Move workpieces together and check whether the welded surfaces are flat. If this is not the
case, trimming must be repeated.
14 ENGLISH