Version July 2014
8
EN
HÜRNER HST 300 Monofuse 2.0 User’s Manual
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
5.1 Turning the Welding Unit on
After connecting the power supply cable to mains power or a gen-
erator, turn the welding unit on using the On/Off switch. This causes
Display 1 to show.
Then the screen changes to Display 2.
Caution
CAUTION in case of System Errors!
If during the auto-test that the unit performs at start-up, an
error is detected, a “System Error” message shows on the
display. When this happens, the welding unit has to be discon-
nected immediately from the power suppy and the fitting,
and it has to be shipped to the manufacturer for repair.
5.2 Connecting the Fitting
Connect the connection terminals to the fitting and check for proper
contact. Use terminal adapters if needed. The contact surfaces of the
cable connection terminals or adapters and the fitting have to be clean.
Dirty terminals may lead to improper welding and also to overheated
and fused connection terminals. Protect the cable connectors against
getting dirty at all times. Terminals and push-on adapters should be
considered consumables and, therefore, have to be checked before
every welding operation and replaced if damaged or dirty.
When the fitting is connected, the “No Contact” message (see Dis-
play 2) disappears.
5.3 Determining Welding Time
The appropriate welding time is determined by the welding unit
through the Fusamatic contact system.
When working a Fusamatic electrofusion fitting with the welding unit,
the unit detects automatically that it was connected and calculates the
welding time required for this fitting. Be sure that the red welding
cable terminal, the one with the measuring pin, is connected to the
red terminal of the Fusamatic fitting. Display 3 will then show.
“Start?” on the screen means that the unit is ready to start welding.
Info
The displayed values are the nominal welding parameters.
They are displayed before the actual resistance of the elec-
trofusion fitting is measured. This means that even when
everything seems o.k., a resistance error may still be detected
(see Sect. 6.2). Only when the welding process starts, the
display shows the actual, measured welding parameters.
5.4 Starting the Welding Process
After connecting the electrofusion fitting, the welding process can
be started using the START/SET key, when the “Start ?” message is
displayed and there is no indication of a problem.
Pressing the START/SET key will trigger a confirmation message “Pipe
treated?,” which in turn requires a confirmation with the START/SET
key to start the welding proper.
Whenever the product cannot properly interpret the welding param-
eters, the appropriate error message is displayed (see Sect. 8). To clear
an error message from the screen, press the START/SET key.
Display 1
Display 2
********************
HUERNER
HST 300 Monofuse 2.0
********************
Contact Fitting
14:32:11 21.10.12
Inp.Volt. 230V 50Hz
No Contact
Display 3
Start?
U= 40 V t= 60 s
