Specific Safety Warnings; Operation; Preparations For Use - Defort DWP-1000 Bedienungsanleitung

SPECIFIC SAFETY WARNINGS

WARNING
● Since the heating element reaches working temper-
atures of up to 300°C, do not touch the heating ele-
ment or steel components between the heating ele-
ment and the plastic handle, once the unit has been
plugged in. Also, do not touch the welded seam on
the plastic pipe or any part of the pipe near welded
seam on the plastic pipe or any part of the pipe near
the seam during and after welding. After the unit has
been unplugged, it will take a certain time to cool
down. Do not accelerate the cooling process by im-
mersing the unit in liquid, otherwise it will be dam-
aged.
● When setting the unit aside when hot, take care to
ensure that the heating element does not come into
contact with combustible material.
● Place the unit down only on its supporting stand, in
the bench support or on a fi re-retardant base.
● Heating spigots and heating sockets shall only be
changed when cold.
Use for the intended purpose
WARNING
Use heating element muff welding equipment for weld-
ing plastic pipes
and mouldings of PB, PE, PP and PVDF.
All other uses are not for the intended purpose and are
prohibited.

2. PREPARATIONS FOR USE

2.1. Electrical connection
WARNING
The sleeve welding unit must be connected to a sock-
et with protective earthing (earth conductor). Note the
mains voltage! Before connecting the unit, check to
ensure that the voltage given on the rating plate corre-
sponds to the mains voltage.
CAUTION
When the unit is hot, hold it only by the handle (3).
Do not touch the heating element (4), the welding
tools (5) or the metal parts between the handle (3)
and heating element (4), otherwise a burn injury
may result.
2.2. Selection of welding tools
Select welding tools (5), heating spigot and heating
socket, according to the pipe size. The tools are mount-
ed on the heating element (4) with the allen key sup-
plied. Two welding tools can be mounted on the heating
element at the same time.
2.3. Preheating of the sleeve welding unit
As soon as the connecting lead is connected to the
mains, the welding unit begins to heat up. The green
power-on indicator lamp (6) and the red temperature in-
dicator lamp (7) light up. The unit requires about 10 min.
to heat up. Once the required temperature is reached,
the built-in thermostat cuts off the power supply to the
heating element. The red temperature control lamp
turns off. Whenever the red temperature control lamp is
lit, the no welding should be carried out.
2.4. Selecting the correct welding temperature
The welder heating element is preadjusted to the aver-
age welding temperature for PP pipes (260°C). Depend-
ing on the pipe material and gauge of the pipe walls,
it may be necessary to adjust this temperature. In this
case, observe the manufacturer's information on the
pipes or mouldings without fail. In addition, the tempera-
ture of the welding tools (spigot and socket) should be
checked with an electric surface thermometer. If neces-
sary, the temperature can be adjusted by turning the
temperature adjusting screw (8). In this case, it should
be remembered that the heating element must not be
used until 10 minutes after the preset temperature has
been reached.

3. OPERATION

3.1. Description of process
In welding with the sleeve welder, the pipe and sleeve
are welded together overlapping. The end of the pipe
and moulded sleeve are heated to welding tempera-
ture by means of the welding tool (spigot and socket),
then welded together. The end of the pipe and fi tting are
matched to the welding spigot and socket respectively
in such a way that a build-up of pressure takes place in
the joint when the two components are mated (Fig. 3).
3.2. Preparations for welding
Take care to observe the information issued by the man-
ufacturer of the pipes or mouldings. The end of the pipe
must be cut off square and fl at, either with a pipe cutter
or pipe shears. In addition, the end of the pipe should
be chamfered to facilitate insertion into the socket. This
process should be performed with the pipe chamfering
unit. Immediately before welding, the end of the pipe
and interior of the sleeve and, if necessary, the heating
spigot and socket should be cleaned with non-adherent
paper or a non-fraying cloth and spirit or industrial al-
cohol. In particular, no remnants of plastic must be left
adhering to the coating on the heating spigot or sock-
et. When cleaning the welding tools, take care to en-
sure without fail that their anti-adhesive coating is not
damaged by tools. The welding surfaces must not be
touched again before welding takes place.
3.3. Welding process stages
3.3.1. Heating-up
For the heating-up process, the pipe and moulding are
pushed axially onto the welding tools in a continuous
movement until they reach the stop or the marking on
the tools. During the heating process, heat penetrates
into the joint faces and brings them up to welding tem-
perature.
3.3.2. Changeover and joining
After the heating process, the pipe and moulding are
pulled away from the welding tools in a series of jerks and
pushed together, without twisting, as far as they will go.
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