ROTHENBERGER ROWELD P 110 - Manual (Page 16)

14 ENGLISH
reaching the set temperature (tolerance +/-3°C) and the green one lights up. After a further 10
minutes the heating element is ready to use. Check the temperature using a temperature meas-
uring instrument.
Setting the off-set:
press the “+“ and “-“ button at the same time. The heater element can subse-
quently be calibrated using one of these buttons and an external temperature measuring instru-
ment.
If the heater element displays a smaller value than that on the external temperature measuring
instrument then the difference must be
adjusted using the “+“ button. For indicated values in the
other direction adjust the difference using the “-“ button. If “Er1“ appears it means that the elec-
tronics are defective. “Er2“ means that the resistance thermometer is defective or not connected.
Very hot – Do not touch! The heating element can reach a temperature of
approx. 290°C!
3.2.2 Measures for preparing welding
For Pipe-to-Pipe welding the two wide main clamps are remaining in the machine.
For Pip-to-Fitting welding the left hand side wide main clamp has to be changed against small
Fitting main clamp.
For Fitting-to-Fitting welding both wide main clamps have to be changed against small fitting
main clamps.
The right hand side small fitting main clamp is available as an option (art. No. 55809).
 Loosen winged handle at main clamp set and swivel away to the front. Then move upper
main clamps up and backwards.
 For pipes which are smaller than the maximum diameter of 110 mm insert reduction clamp-
ing inserts and fix them by using the knurled screw.
 Insert the plastic pipes or fittings to be welded into the clamps. Close upper clamps swivel in
winged handle, align pipe or fitting and screw up the winged handle tightly.
 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 pilot lamp on the temperature regulator flashes.
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 lamp flashes (accord-
ing to DVS). You must check the temperature with an appropriate temperature
measurement device!
 Place the trimmer between the pipe sections to be welded and fix it by the swivel.
 With the hand wheel move the pipe ends carefully against the trimmer blades of the trimmer
discs and turn the trimmer around by moving the handle up and down.
Pipes and fittings can be machined on one side only by turning the block screws on the front
bottom side of the machine towards the side, which is not to be machined.
Risk of injury! Do not grasp into the running knife while the trimmer is put into
operation!
 After the front sides are trimmed flat, which can be recognized by an uniform and unbroken
chip, slowly move the pipe ends apart. Unlock the trimmer by the swivel and remove it.
 Move workpieces together and check whether the welded surfaces are flat. If this is not the
case, trimming must be repeated.
The axial offset between the workpieces must not be more than 10% of the wall thicknes and the
gap between the flat pipe surfaces must be more than 0,5 mm (according DVS). Otherwise ad-
just with help of the clamping screws and repeat trimming.
The trimmed surfaces prepared for welding must not be touched with the hands
and must be kept free of dirt!