
Version April 2012
8 EN HÜRNER HST – S – 315 User’s Manual
HÜRNER Schweisstechnik GmbH
Nieder-Ohmener Str. 26
35325 Mücke,
Germany
terminal, identifier also printed on terminal) must match the
fitting (size and manufacturer) that is going to be used.
Failure to comply with this instruction will result in a poor
welding outcome, may cause damage to the welding unit,
and will cancel any and all warranties under which the unit
is. Bear in mind the following matches:
Connector type A00 – yellow terminal —— Fitting sized
32 - 160 mm, of the makes Valsir, Akatherm, Eurofusion,
Geberit, Waviduo, Coes
Connector type A01 – blue terminal —— Fitting sized
200 - 315 mm, makes Valsir, Akatherm, Eurofusion, Wavisolo
Connector type A02 – red terminal —— Fitting sized
200 - 315 mm, of the make Geberit
Connector type A04 – white terminal —— Fitting sized
200 - 315 mm, of the make Coes
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 welding cable was connected to the welding unit, the dis-
play screen shows the connection type, A00, A01, etc. As soon as the
welding cable is plugged into the electrofusion fitting to be processed,
the yellow LED (Fitting connected) lights up. For the connection type
A04 (white connector), additionally the diameter of the connected
Coes fitting is displayed: 200 mm, 250 mm or 315 mm.
After connecting the electrofusion fitting, start the welding process by
pressing the START key. Pressing this key will cause the welding unit
to show the welding time, which is then counted down.
Depending on the processed fitting, the welding time, which is counted
down on the display, may be up to 700 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 weld-
ing time is 0 s (000 on the display screen), the green LED (End) lights
up at that point, and the audible signal beeps twice. As opposed to
this, with the connection type A02 the system recognizes the proper
end of welding on its own, and despite 000 displayed on the screen,
a welding process may be flawed (see Sect. 6.11).
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.