HURNER HST 300 Junior + 2.0 User manual

Version April 2016
Nieder-Ohmener Str. 26
35325 Mücke (Atzenhain)
HÜRNER SCHWEISSTECHNIK GmbH
User’s Manual
HST 300 Junior+ 2.0
HST 300 Junior 2.0
Inliegende deutsche Fassung der Anleitung ist der Urtext, welchen inliegende Übersetzungen wiedergeben.
The German version of the manual enclosed herein is the original copy, reected in both translations herein.
La version allemande ci-après représente le texte original du manuel, rendu par les deux traductions ci-joint.

Version April 2016 EN 3 HÜRNER HST 300 Junior+ 2.0 User’s Manual
HÜRNER Schweisstechnik GmbH
Nieder-Ohmener Str. 26
35325 Mücke, Germany
Contents
1 Introduction.................................................................................. 5
2 Safety Messages............................................................................ 5
2.1 Using the Correct Connection Terminal ...................................... 5
2.2 Improper Use of the Welding and Power Supply Cables ........... 5
2.3 Securing the Fitting and the Joint............................................... 6
2.4 Cleaning the Product.................................................................... 6
2.5 Opening the Unit.......................................................................... 6
2.6 Extension Cables on the Worksite ............................................... 6
2.7 Checking the Product for Damage .............................................. 6
2.8 General Remark............................................................................ 6
2.9 PowerSupplySpecications ........................................................ 7
2.9.1 Mains Power Supply ..................................................................... 7
2.9.2 Generator Power Supply.............................................................. 7
3 Service and Repair ........................................................................ 8
3.1 General.......................................................................................... 8
3.2 Transport, Storage, Shipment ...................................................... 8
4 Principles of Operation ................................................................ 8
5 Check-out and Operation ............................................................ 9
5.1 Turning the Welding Unit on....................................................... 9
5.2 Connecting the Fitting ................................................................. 9
5.3 Reading the Fitting Code with a Handheld Scanner................ 10
5.4 Starting the Welding Process..................................................... 10
5.5 Welding Process.......................................................................... 10
5.6 End of Welding........................................................................... 11
5.7 Aborted Welding Process........................................................... 11
5.8 Cooling Time............................................................................... 11
5.9 Returning to the Start of Parameter Input ............................... 11
5.10 Using ViewWeld to View Welding Reports............................... 11
6 Entering Welding Parameters Manually
(only for model version HST 300 Junior+ 2.0) ......................... 11
6.1 Manually Entering Welding Voltage and Time ........................ 12
6.2 Entering the String of Numbers ................................................ 12
7 Dedicated Welding Unit Information........................................ 12
7.1 Displaying Characteristics of the Welding Unit ........................ 12
7.2 Measuring Resistance................................................................. 13

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HÜRNER Schweisstechnik GmbH
Nieder-Ohmener Str. 26
35325 Mücke, Germany
7.3 Overheating Switch.................................................................... 13
7.4 Indication of Power Supply Failure at the Last Welding.......... 13
8 ConguringtheWeldingUnit................................................... 13
8.1 Selecting the Display Language................................................. 14
8.2 Setting the Clock ........................................................................ 14
8.3 Setting the Buzzer Volume ........................................................ 15
8.4 Selecting the Temperature Unit and Entering the
Inventory Number ...................................................................... 15
9 Self-Monitoring Functions Overview......................................... 15
9.1 Errors During Data Input............................................................ 15
9.1.1 Code Error................................................................................... 15
9.1.2 No Contact .................................................................................. 15
9.1.3 Low Voltage................................................................................ 15
9.1.4 Overvoltage ................................................................................ 15
9.1.5 Overheated ................................................................................. 15
9.1.6 System Error................................................................................ 16
9.1.7 Temperature Error ...................................................................... 16
9.1.8 Temperatur Sensor Defective..................................................... 16
9.1.9 Clock Error................................................................................... 16
9.1.10 Unit to Service............................................................................. 16
9.1.11 Input Error................................................................................... 16
9.2 Errors During Welding................................................................ 16
9.2.1 Low Voltage................................................................................ 16
9.2.2 Overvoltage ................................................................................ 17
9.2.3 Resistance Error .......................................................................... 17
9.2.4 Frequency Error .......................................................................... 17
9.2.5 Voltage Error............................................................................... 17
9.2.6 Low Current ................................................................................ 17
9.2.7 Excess Current............................................................................. 17
9.2.8 Emergency Off ............................................................................ 17
9.2.9 Heater Coil Error......................................................................... 17
9.2.10 Power Supply Failure at Last Welding....................................... 17
10 TechnicalSpecications.............................................................. 18
11 Service and Repair Contact ........................................................ 18
12 Accessories/Parts for the Product............................................... 18

Version April 2016 EN 5 HÜRNER HST 300 Junior+ 2.0 User’s Manual
HÜRNER Schweisstechnik GmbH
Nieder-Ohmener Str. 26
35325 Mücke, Germany
1 Introduction
Dear Customer:
Thank you very much for purchasing our product. We are
confident that it will meet your expectations.
The Welding Unit, in the model version HST 300 Junior + 2.0
and HST 300 Junior 2.0, is designed exclusively for welding
plastic pipe fittings according to the electrofusion process.
It represents the next generation of the tried and tested
HST 300 series, featuring a broader range of functions.
The product was manufactured and checked according to
state-of-the-art technology and widely recognized safety
regulations and is equipped with the appropriate safety
features.
Before shipment, it was checked for operation reliability
and safety. In the event of errors of handling or misuse,
however, the following may be exposed to hazards:
• the operator’s health,
• the product and other hardware of the operator,
• the efficient work of the product.
All persons involved in the installation, operation, main-
tenance, and service of the product have to
• be properly qualified,
• operate the product only when observed,
• read carefully and conform to the User’s Manual before
working with the product.
Thank you.
2 Safety Messages
2.1 Using the Correct Connection Terminal
Use the appropriate connection terminal that is compat-
ible with the fitting type used. Be sure the contact is
firmly established and do not use connection terminals or
terminal adapters that are burnt or not designed for the
intended use.
2.2 Improper Use of the Welding and Power Supply
Cables
Do not carry the product by its cables and do not pull the
power cord to unplug the unit from the socket. Protect
the cables against heat, oil, and cutting edges.

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HÜRNER Schweisstechnik GmbH
Nieder-Ohmener Str. 26
35325 Mücke, Germany
2.3 Securing the Fitting and the Joint
Use positioner clamps or a vice to secure the fitting and
the joint to be made before welding. The fitting manufac-
turer’s installation instructions, local and national regula-
tions have to be respected in all cases.
A welding process must never be repeated with the same
fitting, since this may cause parts under power to be ac-
cessible to the touch.
2.4 Cleaning the Product
The product must not be sprayed with or immersed in
water.
2.5 Opening the Unit
Caution
The cover of the product may be removed only by
specialized staff of the manufacturer or of a service
shop properly trained and approved by it.
2.6 Extension Cables on the Worksite
To extend power cord length, use exclusively properly ap-
proved extension cables that are labeled as such and have
the following conductor sections:
up to 20 m: 1.5 mm² (2.5 mm² recommended);
Type H07RN-F
over 20 m: 2.5 mm² (4.0 mm² recommended);
Type H07RN-F
Caution
When using the extension cable, it has always to
be rolled off completely and lie fully extended.
2.7 Checking the Product for Damage
Before every use of the product, check safety features
and possibly existing parts with minor damage for proper
function. Make sure that the push-on connection terminals
work properly, that contact is fully established, and that
the contact surfaces are clean. All parts have to be installed
correctly and properly conform to all conditions in order
for the product to function as intended. Damaged safety
features or functional parts should be properly repaired
or replaced by an approved service shop.
2.8 General Remark
Comply with the indications and instructions about prod-
uct maintenance to ensure proper and safe work. Use
only accessories and spare parts that are recommended or

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HÜRNER Schweisstechnik GmbH
Nieder-Ohmener Str. 26
35325 Mücke, Germany
approved by the manufacturer. Using other parts or acces-
sories may put yourself in danger of bodily injury or cause
the device to malfunction.
2.9 PowerSupplySpecications
2.9.1 Mains Power Supply
Utility suppliers’ wiring requirements, occupational safety
rules, applicable standards, and national codes have to be
respected.
Caution
When using power distributions on the worksite,
rules for the installation of earth-leakage circuit
breakers (RCD) have to be respected, and operation
requires an installed breaker.
Generator or mains power fuse protection should be max.
16 A (slow blow). The product has to be protected against
rain and humidity.
2.9.2 Generator Power Supply
The required nominal generator capacity as determined
by the power supply requirement of the largest fitting to
be welded depends on the power supply specifications,
the environment conditions, and the generator type itself
including its control/regulation characteristics.
Nominal output power of a generator 1-phase, 220 - 240 V,
50/60 Hz:
d 20.....d 160 3.2 kW
d 160....d 450 4 kW mechanically regulated
5 kW electronically regulated
Start the generator first, then connect the welding unit.
The idle voltage should be set to approx. 240 volts. When
turning the generator off, disconnect the welding unit first.
Important
The working output power of the generator de-
creases by about 10% per 1,000 m of altitude.
During the welding process no other device con-
nected to the same generator should be operated.

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HÜRNER Schweisstechnik GmbH
Nieder-Ohmener Str. 26
35325 Mücke, Germany
3 Service and Repair
3.1 General
As the product is used in applications that are sensitive to
safety considerations, it may be serviced and repaired only
by the manufacturer or its duly authorized and trained
partners. Thus, constantly high standards of operation
quality and safety are maintained.
Failure to comply with this provision will dispense the
manufacturer from any warranty and liability claims for
the product, including any consequential damage.
When serviced, the unit is upgraded automatically to the
technical specifications of the product at the moment it is
serviced, and we grant a three-month functional warranty
on the serviced unit.
We recommend having the product serviced at least every
twelve months.
Any provisions in the law pertaining to an electrical safety
inspection have to be complied with.
3.2 Transport, Storage, Shipment
The product ships in a transport box. The product should
be stored in this box, protects the product from humidity
and environmental agents.
When sending the product, it should be placed into the
transport box at all times.
Any provisions in the law pertaining to an electrical safety
inspection have to be complied with.
4 Principles of Operation
The HST 300 Junior + 2.0 and the HST 300 Junior 2.0 allow
welding electrofusion fittings that feature a bar code.
Every fitting is provided with a tag with one or two bar
codes on it. The structure of this code is internationally
standardized. The first code, encoding the data on proper
welding, complies with ISO TR 13950 and can be processed
with the welding unit.
The model version HST 300 Junior + 2.0 allows addition-
ally the manual input of the welding parameters. The
microprocessor-controlled welding unit:-
• controls and monitors the welding process in a fully
automated fashion,

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HÜRNER Schweisstechnik GmbH
Nieder-Ohmener Str. 26
35325 Mücke, Germany
• determines welding duration depending on ambient
temperature.
The latter is done by the temperature sensor located on
the welding cable, which checks the ambient temperature
at regular intervals.
The unit monitors the characteristics of its power supply
continuously. If one of these is out of tolerance, welding
is aborted or cannot be started.
5 Check-out and Operation
• To operate the welding unit, be sure that it is set on a
proper, level surface.
• Be sure that power supply/generator protection is 16 A
(slow blow).
• Plug the power supply cord into the mains power
supply or the generator.
• Read and comply with the User’s Manual of the gen-
erator, if applicable.
5.1 Turning the Welding Unit on
After connecting the power supply cable to mains power
or a generator, 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” mes-
sage shows on the display. When this happens, the
welding unit has to be disconnected 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 adapt-
ers 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.
Display 1
********************
HUERNER
HST 300 Junior+ 2.0
********************
Display 2
Enter Fitting Code
14:32:11 21.10.12
Inp.Volt. 230V 50Hz
No Contact

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HÜRNER Schweisstechnik GmbH
Nieder-Ohmener Str. 26
35325 Mücke, Germany
When the fitting is connected, the “No Contact” message
(see Display 2) disappears.
5.3 Reading the Fitting Code with a Handheld
Scanner
Only the bar code on the tag sticking on the fitting to be
welded may be used. It is not acceptable to read the fitting
code tag of a fitting of a different kind if the intended
one is damaged or unreadable.
Read the fitting code by holding the scanner in front of
the bar code at a distance of 5 to 10 cm (2 to 4 inches),
where the red line indicates the reading area. Then push
the reading button. If the data are correctly read, the weld-
ing unit confirms this by an audible signal and displays the
decoded data on the screen (see Display 3).
Info
The displayed values are the nominal welding
parameters contained in the fitting bar code or
computed based on these data. They are displayed
before the actual resistance of the electrofusion
fitting is measured. This means that even when
the showing ohm value is o.k., a resistance error
may still be detected (see Sect. 7.2). Only when
the welding process starts, the display shows the
actual, measured welding parameters.
The “Start ?” message means that the unit is ready to start
the welding process. Check the read data and if you see
that they are erroneous, delete them by pressing the STOP/
RESET key. The read data are also deleted if the welding
unit is disconnected from the fitting.
5.4 Starting the Welding Process
After reading or entering the fitting code, 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 mes-
sage “Pipe treated?,” which in turn requires a confirmation
with the START/SET key to start the welding proper.
5.5 Welding Process
The welding process is monitored for its entire duration
applying the welding parameters contained in the fitting
code. The welding voltage, the resistance, and the weld-
ing current are displayed in the lower line of the screen.
Display 3
Start ?
Temp.: 20°C
HST 315mm 58s
MON 35.00V 1.57Ω
Display 4
Act. Time: 56sec
Nom. Time: 90sec
35.00V 1.57Ω 15.94A

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HÜRNER Schweisstechnik GmbH
Nieder-Ohmener Str. 26
35325 Mücke, Germany
5.6 End of Welding
The welding process ends successfully if the actual weld-
ing time corresponds to the nominal welding time and the
buzzer can be heard twice.
5.7 Aborted Welding Process
The welding process has failed if a plain-text error is dis-
played on the screen and the audible signal buzzes con-
tinuously. An error has to be acknowledged by pressing
the STOP/RESET key.
5.8 Cooling Time
The cooling time as given in the fitting manufacturer’s
instructions has to be respected. If the bar code provided
by the fitting manufacturer contains cooling time data,
it will be displayed at the end of the welding process and
will be counted down to zero. This countdown can be ac-
knowledged and canceled at any time by the STOP/RESET
key. However, note that for that time the pipe fitting joint
which is still warm must not be subjected to an external
force. No cooling time is displayed if the fitting code does
not contain any such information.
5.9 Returning to the Start of Parameter Input
After welding is finished, disconnecting the welded fitting
from the unit or pressing the STOP/RESET key will reset the
unit back to the start of entering the welding parameters.
5.10 Using ViewWeld to View Welding Reports
The ViewWeld feature offers viewing an abstracted version
of the welding report recorded during the last welding
process. The ViewWeld abstract shows the report number,
the date and time of the welding and the welding param-
eters along with an evaluation of the quality of the joint/
welding operation (see Display 5).
To call the ViewWeld abstract of a welding report, press
the ñkey in the bar code input screen (see Display 2).
6 Entering Welding Parameters Manually
(only for model version HST 300 Junior+ 2.0)
To be able to enter the welding parameters manually, you
have first to connect the fitting to the welding unit with
the welding cable. The manual input of the parameters can
then be accessed by pressing the òarrow key. The screen
Display 5
0015 24.02.13 09:33
M/B MON HST 315
0058s 025.0V 1.57Ω
Welding OK
Display 6
** MANUAL INPUT **
>Enter Voltage/Time
Enter Fitting Code

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HÜRNER Schweisstechnik GmbH
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will show a menu as reproduced in Display 6, provided
manual input is enabled in the configuration menu (see
Sect. 8.1). In other words, the manual parameter input
replaces reading the bar code of the fitting with a scanner.
Using the arrow keys ñand òyou can select “Enter Volt-
age/Time” or “Enter Fitting Code” (i.e., the numbers that
represents the code of the fitting to be used). Confirm your
selection by pressing the START/SET key.
6.1 Manually Entering Welding Voltage and Time
If this option was chosen in the manual parameter input
menu, a display like the one to the right appears on the
screen. Use the arrow keys ï, ð, ñ, òto set the welding
voltage and the welding time, according to the fitting
manufacturer’s instructions, then press the START/SET key
to confirm your input. The “Start ?” message displayed
after the confirmation by START/SET indicates that the unit
is ready for welding.
6.2 Entering the String of Numbers
If this option was chosen in the manual parameter input
menu, the “Enter Fitting Code” display shows. The 24
characters of the fitting code to be entered display as
asterisks ( *). Use the arrow keys ï, ð, ñ, òto enter the
code and press START/SET to confirm your input and have
it decoded. If the code entered is not correct, an “Input
Error” message appears; check the string of numbers and
correct as needed. If the code is correct, the decoded data
is displayed, and the “Start ?” message indicates that the
unit is ready to start welding.
7 Dedicated Welding Unit Information
7.1 Displaying Characteristics of the Welding Unit
The key technical information on the welding unit itself is
displayed by pressing the ðkey at the “Enter Fitting Code”
screen. They are the software version, the serial number of
the unit, and the date of the next scheduled maintenance.
To quit this screen, press the STOP/RESET key.
If the scheduled service is overdue, a service due message
appears on the screen as soon as the unit is plugged into
the mains or generator power supply. This message has to
be acknowledged by pressing START/SET.
Display 7
Voltage/Time
U= 40 V t= 1000 s

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7.2 Measuring Resistance
When the START/SET key was pressed to initiate a welding
process, the resistance value of the fitting is measured and
compared to the value entered as part of the read fitting
code. If the gap between the two values is smaller than
the acceptable tolerance given in the code, the welding
process starts. If the gap is greater than the preset tol-
erance, the welding unit aborts welding and displays a
“Resistance Error” message. Furthermore, it displays the
actual resistance value measured for the connected fitting.
The reason for a resistance error may be poorly contacting
and/or worn connection terminals. Therefore, if this error
occurs, check them for proper fit and, if worn, replace
them with new ones.
7.3 Overheating Switch
The welding process aborts if the temperature of the
transformer in the welding unit is too high. The overheat-
ing circuit breaker for the transformer stops the welding
if the temperature reading is too high and the remaining
welding time is longer than 800 seconds. The display and
the welding report will show an “Overheated” message.
7.4 Indication of Power Supply Failure at the Last
Welding
The message “Power Supply Failure Last Welding” indicates
that the previous welding aborted because of a power
supply failure. The reason may be too weak a generator
or too long or too thin an extension cable, or a tripped
cut-out in the mounting box. The next welding operation
is still possible after acknowledging the message by press-
ing the STOP/RESET key.
8 ConguringtheWeldingUnit
With the operator identity card, the welding unit can be
reconfigured. When the MENU key is pressed, the “Enter
Menu Code” message appears on the screen. After the
code was read from the operator card, a screen reading
“Settings – M – ” is displayed, in which the settings menu
proper (Display 8) can be opened by pressing the MENU
key again.
In the configuration menu, use the ñand òarrow keys
to select the desired set-up option. Use the ðarrow key
to toggle between “on” and “off” for that set-up option.

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If a “M” is shown next to a set-up option, this indicates that
a sub-menu is accessible here by pressing the MENU key.
Press the START/SET key to confirm the set-up and save it
to memory.
Understanding the settings:
“Manual Input on” means that the manual input of weld-
ing parameters (see Sect. 6) is possible, “off,” that the
manual input is not allowed (option available only with
HST 300 Junior + 2.0 model version).
“Language – M – ” means that by pressing the MENU key,
the user can access a sub-menu for selecting the display
and report language (see Sect. 10.1.1).
“Date/Time – M – ” means that by pressing the MENU key,
the user can access a sub-menu for setting the clock
(see Sect. 10.1.2).
“Buzzer Volume – M – ” means that by pressing the MENU
key, the user can access a sub-menu for setting the
volume of the status buzzer (see Sect. 10.1.3).
“Temperature Unit – M – ” means that by pressing the
MENU key, the user can access a sub-menu for select-
ing centigrade or Fahrenheit as the unit for the tem-
perature.
“Inventory Number – M – ” means that by pressing the
MENU key, the user can access a sub-menu for entering
the number under which the unit is inventorized with
the operating company.
8.1 Selecting the Display Language
When the “Select Language” sub-menu was selected, the
screen changes and the display reproduced in Display 9
appears.
Use the arrow keys ñand òto select one of the options,
“Deutsch,” “English,” and “Français” and confirm by press-
ing the START/SET key.
8.2 Setting the Clock
When the “Set Clock” sub-menu was selected, the screen
changes and the display reproduced in Display 10 appears.
The time of day and the date can be set using the keypad.
The portions “Hour,” “Minute,” “Day,” “Month,” and
“Year” are set separately. Press the START/SET key to con-
firm your settings.
Display 8
*** SET-UP MENU ***
Manual Input on
Language -M-
>Date/Time -M-
Display 9
***** LANGUAGE *****
>Deutsch
English
Francais
Display 10
Date/Time
21.06.2013 14:28

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8.3 Setting the Buzzer Volume
When the “Set Volume” sub-menu was selected, the screen
changes and the display reproduced in Display 11 appears.
The buzzer can also be heard. Turn the buzzer volume up
or down to the desired value using the ï, ðarrow keys
(from 0 to 100) and confirm your setting by pressing the
START/SET key.
8.4 Selecting the Temperature Unit and Entering the
Inventory Number
The unit of temperature values (Centigrade or Fahrenheit)
can be selected in a sub-menu similar to the language selec-
tion (see Sect. 10.1.1). The internal identifier of the welding
unit in its owner’s inventory, a maximum of 8 characters,
can be entered using the ï, ð, ñ, òarrow keys; it has
then to be confirmed by pressing the START/SET key.
9 Self-Monitoring Functions Overview
9.1 Errors During Data Input
9.1.1 Code Error
An erroneous input has occurred, a code tag is poor or has
an error in code symbology or code reading was improper.
9.1.2 No Contact
There is no properly established electric contact between
the welding unit and the fitting (check push-on terminal
on fitting), or the heater coil is defective.
9.1.3 Low Voltage
The input voltage is below 175 volts. Adjust generator
output voltage.
9.1.4 Overvoltage
The input voltage is over 290 volts. Decrease generator
output voltage.
9.1.5 Overheated
The transformer temperature is too hot. Let the welding
unit cool down for about 1 hour.
Display 11
Buzzer Volume
< ------20-------- >

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9.1.6 System Error
CAUTION!
The welding unit has to be disconnected immediately from
both the power supply and the fitting. The auto-test has
detected an error in the system. The unit must no longer
be operated and has to be sent to an approved shop for
check and repair.
9.1.7 Temperature Error
The ambient temperature measured is outside the operat-
ing range of the welding unit, i.e., below – 20°C (– 4°F) or
over + 60°C (+ 140°F).
9.1.8 Temperatur Sensor Defective
The ambient temperature sensor on the welding cable is
damaged or defective.
9.1.9 Clock Error
The internal system clock works improperly or is defective.
Reset it, or send the welding unit to the manufacturer for
check and service.
9.1.10 Unit to Service
The recommended next service date for the welding unit is
overdue. The service due message has to be acknowledged
by pressing the START/SET key. Send the welding unit to
the manufacturer or an approved service point for service
and check-up.
9.1.11 Input Error
A code that was entered is incorrect. At manual welding
parameter input, no welding time was entered. An incor-
rect value was selected in the date setting.
9.2 Errors During Welding
All errors that occur while welding is in progress are also
indicated by an audible alarm.
9.2.1 Low Voltage
The input voltage is below 175 volts. If the error condition
persists for longer than 15 seconds, the welding process
will be aborted. If the voltage goes down below 170 volts,
the welding process will abort immediately.

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9.2.2 Overvoltage
The input voltage is over 290 volts. If the error condition
persists for longer than 15 seconds, the welding process
will be aborted.
9.2.3 Resistance Error
The resistance value of the connected fitting is out of the
read tolerance.
9.2.4 Frequency Error
The frequency of the input voltage is out of tolerance
(42 Hz - 69 Hz).
9.2.5 Voltage Error
Check generator voltage and current. The output voltage
does not correspond to the value previously read; the weld-
ing unit has to be sent to the manufacturer for check-up.
9.2.6 Low Current
The message is displayed if the there is a momentary cur-
rent failure or if the current decreases by more than 15%
per second for 3 seconds.
9.2.7 Excess Current
The output current value is in excess; possible causes: short-
circuit in the heater coil or the welding cable. During the
start stage the upper abort threshold equals 1.18 times the
value at start, in any other case the upper limit depends
on the load value and is calculated as the current at start
plus 15%.
9.2.8 Emergency Off
The welding process has been interrupted by pressing the
STOP/RESET key.
9.2.9 Heater Coil Error
The dynamic current value during welding differs by more
than 15% from the required value, indicating a short-circuit
in the heater coil.
9.2.10 Power Supply Failure at Last Welding
The last welding is incomplete. The welding unit was dis-
connected from the power supply voltage while it was
in progress. To go on using the unit, this error has to be
acknowledged by pressing the STOP/RESET key (see also
Sect. 7.4).

Version April 2016
18 EN HÜRNER HST 300 Junior+ 2.0 User’s Manual
HÜRNER Schweisstechnik GmbH
Nieder-Ohmener Str. 26
35325 Mücke, Germany
10 TechnicalSpecications
Nominal Voltage 230 V
Frequency 50 Hz / 60 Hz
Output Power 2800 VA, 80% duty cy.
Ingress Protection IP 54
Primary Current max. 16 A
Ambient Temperature – 20°C to + 60 °C
(– 4°F to + 140°F)
Output Voltage 8 V - 48 V
Max. Output Current 110 A
Tolerances:
Temperature ± 5 %
Voltage ± 2 %
Current ± 2 %
Resistance ± 5 %
11 Service and Repair Contact
HÜRNER Schweisstechnik GmbH
Nieder-Ohmener Str. 26 Tel.: [phone]
35325 Mücke, Germany Fax: [phone]
Web: http://www.huerner.de Mail: [e-mail]
Info
We reserve the right to change technical specs of
the product without prior notice.
12 Accessories/Parts for the Product
ConnectionTerminal4.7threaded(ttingconnectorof
welding cable), compatible with Uponor, DURA-Pipe,
Simona, Strengweld, Plasson 216 - 023 - 430
Push-onAdapterFFat
compatible with Friatec 216 - 010 - 070
Push-on Adapter FF round 4.0 compat. w/ Friatec, GF, agru,
Wavin, Euro Standard 216 - 010 - 080
Push-onAdapterFFpincompatiblewithFriatecFriat
(waste water) 216 - 010 - 400
Push-on Adapter GF compatible w/ GF, agru, Wavin, with
free wires 216 - 010 - 090
Push-on Elbow Adapter 4.7 - 4.7 90° 216 - 010 - 580
Adapter Bag 216 - 030 - 310
Welder/Operator ID Card 216 - 080 - 031

KONFORMITÄTSERKLÄRUNG
Declaration of Conformity
Déclaration de conformité
Wir / We / Nous HÜRNER Schweißtechnik
Nieder-Ohmener Str. 26
D-35325 Mücke-Atzenhain
erklären in alleiniger Verantwortung, dass das Produkt
declare under our sole responsibility that the product
déclarons sous notre seule responsabilité que le produit
HÜRNER HST 300 Junior (+) 2.0
Schweißautomat zur Verarbeitung von Elektroschweiß-Fittings
Welding Device for Processing Electrofusion Fittings
Appareil pour l’électrosoudage par fusion des raccords de tuyauterie,
auf die sich diese Erklärung bezieht, mit den folgenden Normen oder normativen Dokumenten
übereinstimmen
to which this declaration relates, are in conformity with the following standards or standardizing
documents
auxquels se réfère cette déclaration, sont conformes aux normes et documents de normalisation
suivants
CE-Konformität / CE Conformity / Conformité CE
EMC Directive 2004/108/EG (==> 2014/30/EU)
Low Voltage Directive 2006/95/EG (==> 2014/35/EU)
Andere Normen / Other Standards / Autres normes
EN 60335-1:2012/A11:2014 EN 61000-3-3:2013
EN 60335-2-45:2002/A2:2011 EN 62135-2:2008
EN 60529:2014 ISO 12176-2
EN 61000-3-2:2014 WEE 2012/19/EU
Bei einer nicht mit uns abgestimmten Änderung der Maschine oder einer Reparatur von Personen,
die nicht von uns im Hause geschult und autorisiert wurden, verliert diese Erklärung ihre Gültigkeit.
Any and all modications of the device without our prior approval, and any repairs by persons who
were not trained and authorized by us, shall cause this declaration to become void.
En cas de modication apportée à l’appareil sans notre accord préable ainsi que de réparation
effectuée par des personnes non formées et agréées par non soins, cette déclaration deviendra
caduque.
Mücke-Atzenhain ............................................................................
CE Marking Date 19.04.2016 Dipl.-Ing. Michael Lenz
Geschäftsführer
General Manager
Directeur général