Operation; Turning The Welding Unit On; Connecting The Electrofusion Fitting; Welding Process - Hürner HST – S – 160 Manuel Utilisateur

H Ü R N E R S c h w e i s s t e c h n i k G m b H
Nieder-Ohmener Str. 26
35325 Mücke, Germany
• indicates all information with three LEDs and a seven-segment
display screen.
Other optional accessories
• Transport Box
• Handheld Scraper
5

Operation

5.1

Turning the Welding Unit On

After connecting the power supply cord to 230 V mains power, turn
the welding unit on at the On/Off switch. The unit then performs an
auto-test. All three LEDs light up briefly and simultaneously to indicate
that the unit is ready for operation. Furthermore, the seven-segment
characters show the welding mode H00 for approximately 1 second.
After this, both the LEDs and the screen characters go off again.
5.2

Connecting the Electrofusion Fitting

Connect the connection terminals to the fitting and check for proper
fit. The contact surfaces of the connection terminals and the fitting
have to be clean. Dirty terminals may lead to improper welding and
also to overheated and fused terminal plugs.
After the fitting was connected, the yellow LED (Fitting connected)
lights up. At the same time, the screen displays the welding time. The
welding process can now be started by pressing the START key.
The welding time is counted down from about 80 s.
5.3

Welding Process

The welding process is monitored for its entire duration, applying the
welding parameters computed for the electrofusion fitting.
5.4

End of Welding

The welding process was completed successfully if the actual welding
time is 0 s (000 on the display screen), the green LED (End) lights up
at that point, and the audible signal beeps twice.
5.5

Aborted Welding

The welding process has caused errors if the red LED (Fault) is on and
the audible signal beeps intermittently. Additionally, an error code is
displayed on the screen.
An error has to be acknowledged by pressing the STOP key.
5.6

Cooling Time

The cooling time as given in the fitting manufacturer's instructions has
to be respected. Note that for that time the pipe/fitting joint which is
still warm must not be subjected to an external force.
5.7

Returning to the Start of Welding

After welding is finished, disconnecting the welded fitting from the
welding unit will cause the unit to return to the start of welding. An
additional safety feature prevents a given electrofusion fitting from
being welded twice inadvertently: after a properly completed or an
Version August 2012 HÜRNER HST – S – 160 User's Manual
7
EN