LESITE LST600A User manual
Plastic Extrusion Welder
LESITE
Dual Heating/Single Heating/Granules EN
Please read this manual carefully before using this machine,
and keep it for future reference
Each plastic extrusion welder must undergo a double test of 100% performance
and safety before leaving the factory.
Application
Precautions
Used for welding thermoplastic materials PE and PP (sheet + film material) in the
following fields：
Container Fabrication Piping Fabrication
Electroplating Anti-corrosion Equipment Landfill
Repair of Geomembrane Environmental Protection Equipment
Please confirm that the machine is turned off and unplugged
before disassembling the welding machine so as not to be
injured by live wires or components inside the machine.
The welding machine generates high temperature and high
heat, which may cause fire or explosion when used incorrectly,
especially when it is close to combustible materials or explosive gas.
Please do not touch the air duct and nozzle(during welding work or
when the welding machine has not completely cooled down),
and do not face the nozzle to avoid burns.
The power supply voltage must match the rated voltage
marked on the welding machine and be reliably grounded. Connect
the welding machine to a socket with a protective ground conductor.
In order to ensure the safety of the operators and the reliable
operation of the equipment, the power supply at the construction site
must be equipped with a regulated power supply and a leakage protector.
The welding machine must be operated under the correct control of the
operator, otherwise it may cause combustion or explosion due to
high temperature.
It is strictly forbidden to use the welding machine in water or muddy
ground, avoid soaking, rain or damp.
LESITE
Dual Heating/Single Heating/Granules EN
Product Series
LST600A LST600B LST600C
LST610A LST610B LST610C
LST600E LST600F LST610E
LST620
LESITE
Dual Heating/Single Heating/Granules EN
Dual Heating Extrusion Welder Parameter
Model LST600A LST600B
Rated Voltage
Frequency
Extruding Motor Power
Hot Air Power
Welding Rod Heating Power
Hot Air Temperature
Plastic Extruding Temperature
Extruding Volume
Welding Rod Diameter
Net Weight
Driving Motor
Digital Display
Trouble Display
Certificate
Warranty
Model LST600C
Rated Voltage
Frequency
Extruding Motor Power
Hot Air Power
Welding Rod Heating Power
Hot Air Temperature
Plastic Extruding Temperature
Extruding Volume
Welding Rod Diameter
Net Weight
Driving Motor
Digital Display
Trouble Display
Certificate
Warranty
LESITE
Dual Heating Extrusion Welder Parameter
Dual Heating/Single Heating/Granules EN
Model LST610A LST610B
Rated Voltage
Frequency
Extruding Motor Power
Hot Air Power
Welding Rod Heating Power
Hot Air Temperature
Plastic Extruding Temperature
Extruding Volume
Welding Rod Diameter
Net Weight
Driving Motor
Digital Display
Trouble Display
Certificate
Warranty
Model LST610C
Rated Voltage
Frequency
Extruding Motor Power
Hot Air Power
Welding Rod Heating Power
Hot Air Temperature
Plastic Extruding Temperature
Extruding Volume
Welding Rod Diameter
Net Weight
Driving Motor
Digital Display
Trouble Display
Certificate
Warranty
LESITE
Dual Heating/Single Heating/Granules EN
Main Parts
1、Control Box Temperature Adjust Knob 2、Control Box Power Switch
3、Hot Air Blower Power Switch 4、Hot Air Blower Potentiometer
5、Hot Air Scooper 6、Welding Shoe
7、Welding Shoe Aluminum Base 8、Temperature Storage Tube
9、Flange 1 0 、H a n d l e
11、Drive Motor Switch 12、Welding Rod Feeding Inlet
LESITE
Dual Heating/Single Heating/Granules EN
Dual Heating Extrusion Welder Operating steps
LESITE
1、Plug in
2、Press the control box power switch and rotate the control box temperature adjust knob
to 320-350℃ （Digital Display）
3、When the digital display temperature reaches setting temperature, delay 180
seconds before starting the drive motor (cold start protection)
1、Turn on the hot air blower power switch, rotate the hot air blower potentiometer to
position 6-7
2、Clean the welding rod surface and insert it into the feeding inlet
3、Press the drive motor switch ( short contact 2-3 seconds). After repeating 2-3 times,
confirm the sound of the drive motor is normal and the speed of welding
rod extrusion is smooth（Extend the heating time if the sound is abnormal or welding rod
is not extruded）
4、The extruded welding rod is not soft or hard, and the smooth surface luster is the
best extruding effect
6、Start Welding
1、If the sound of the drive motor suddenly changes or the welding rod is stuck without
feeding, it is necessary to immediately loosen the drive motor switch and check whether
the heating temperature is normal
2、In the case of no welding rod feeding in, immediately release the drive motor switch.
Do not start the drive motor without welding rod
1、The plastic in the extruder must be cleaned before the machine is turned off so as not to
cause blockage and damage the extruder next time
2、After cleaning plastic, set the hot air blower potentiometer to 0 and cool it down
3、Turn off the hot air blower power switch
4、Turn off the control box power switch
5、Cut off the power
Dual Heating/Single Heating/Granules EN
Single Heating Extrusion Welder Parameter
Model LST600E LST600F
Rated Voltage
Frequency
Extruding Motor Power
Hot Air Power
Welding Rod Heating Power
Hot Air Temperature
Plastic Extruding Temperature
Extruding Volume
Welding Rod Diameter
Net Weight
Driving Motor
Certificate
Warranty
Model LST610E
LESITE
Rated Voltage
Frequency
Extruding Motor Power
Hot Air Power
Welding Rod Heating Power
Hot Air Temperature
Plastic Extruding Temperature
Extruding Volume
Welding Rod Diameter
Net Weight
Driving Motor
Motor Overload Protection
Certificate
Warranty
Dual Heating/Single Heating/Granules EN
Main Parts
1、Hot Air Blower Power Switch 2、Hot Air Blower Potentiometer
3、Welding Shoe Aluminum Base 4、Welding Shoe
5、Hot Air Scooper 6、Temperature Storage Tube
7、Flange 8 、H a n d l e
9、Drive Motor Switch 10、Welding Rod Feeding Inlet
LESITE
Dual Heating/Single Heating/Granules EN
Single Heating Extrusion Welder Operating Steps
LESITE
1、Plug in
2、Turn on the hot air blower power switch
3、Rotate the hot air blower potentiometer to position 6-7
4、After waiting for 9 minutes to complete the preheating, prepare to insert the welding rod
1、Clean the welding rod surface and insert it into the feeding inlet
2、Press the drive motor switch ( short contact 2-3 seconds). After repeating 2-3 times,
confirm the sound of the drive motor is normal and the speed of welding rod extrusion is
smooth（Extend the heating time if the sound is abnormal or welding rod is not extruded）
3、The extruded welding rod is not soft or hard, and the smooth surface luster is the
best extruding effect
4、Start Welding
1、If the sound of the drive motor suddenly changes or the welding rod is stuck without
feeding, it is necessary to immediately loosen the drive motor switch and check whether
the heating temperature is normal
2、In the case of no welding rod feeding in, immediately release the drive motor switch.
Do not start the drive motor without welding rod
1、The plastic in the extruder must be cleaned before the machine is turned off so as not to
cause blockage and damage the extruder next time
2、After cleaning plastic, set the hot air blower potentiometer to 0 and cool it down
3、Turn off the hot air blower power switch
4、Cut off the power
Dual Heating/Single Heating/Granules EN
Granules Extrusion Welder
Model LST620
Rated Voltage
Frequency
Extruding Motor Power
Hot Air Power
Granules Heating Power
Air Temperature
Plastic Extruding Temperature
Extruding Volume
Net Weight
Driving Motor
Certificate
Warranty
LESITE
1、Welding Shoe 2、Welding Shoe Aluminum Base 3、Temperature Storage Tube
4、Flange 5、Hooper 6、Control Box Power Switch
7、Control Box Temperature Adjust Knob 8、Drive Motor Switch
9、Hot Air Blower Potentiometer 10、Hot Air Blower Power Switch 11、Handle
1、The plastic in the extruder must be cleaned before the machine is turned off so as not to
cause blockage and damage the extruder next time
2、After cleaning plastic, set the hot air blower potentiometer to 0 and cool it down
3、Turn off the hot air blower power switch
4、Turn off the control box power switch
5、Cut off the power
Dual Heating/Single Heating/Granules EN
Granules Extrusion Welder Operating Steps
LESITE
1、Plug in
2、Press the control box power switch and rotate the control box temperature adjust knob
to 320-350℃ （Digital Display）
3、When the digital display temperature reaches setting temperature, delay 180 seconds
before starting the drive motor (Cold Start Protection)
1、Turn on the hot air blower power switch, rotate the hot air blower potentiometer to
position 6-7
2、Pour plastic granules into the hooper
3、Press the drive motor switch and press the self-locking button, Confirm the sound of
the drive motor is normal and the speed of granules extrusion is smooth（Extend the
heating time if the sound is abnormal or granules is not extruded）
4、The extruded granules is not soft or hard, and the smooth surface luster is the best
extruding effect
5、Start Welding
1、If the sound of the drive motor suddenly changes or the granules is stuck without feeding,
it is necessary to immediately loosen the drive motor switch and check whether the heating
temperature is normal
2、In the case of no granules feeding in, immediately release the drive motor switch. Do not
start the drive motor without granules
Dual Heating/Single Heating/Granules EN
Replacement of Welding Shoe
Direction of Welding Shoe
LESITE
1、Remove the welding shoe with base from the extruder nozzle by loosening the tightening
screws (1)
2、For each replacement, the residue in the welding shoe must be cleaned and the
extruder nozzle must be tightened
3、Remove the welding shoe PTFE (4) from the welding shoe aluminum base (3) by loosening
fastening screws (2)
1、Use the fastening screws (2) to install a welding shoe PTFE (4) on welding shoe
aluminum base (3)
2、Welding shoe PTFE (4) must be tightened with fastening screws (2) and tightening
screws (1)
By loosening the tightening screws, the
welding shoe can be rotated to the
required welding direction.
The tightening screws must be retightened.
1. Tightening Screws
2. Fastening Screws
3. Welding Shoe Aluminum Base
4. Welding Shoe PTFE
Dual Heating/Single Heating/Granules EN
Replacement of Heating Element
LESITE
Loosen the long hex socket screw (2) on the hot air blower connector (1) and the long hex
socket screw (4) on the hot air blower bracket (3) to remove the hot air blower (5) from the
plastic extrusion welder
Loosen the long Phillips screw (6) of the hot air blower and remove the air duct (7) and the
high temperature gasket (8) from the outer cover (10)
Slowly remove the heating element (9) from the outer cover (10)
Install the new heating element (9) in the outer cover (10)
Cover the high temperature gasket (8) and air duct (7) in order and lock them with the
long philips screw (6)
Install the hot air blower (5) in the plastic extrusion welder and fix it with the tighten long
hex socket screw(2) and the long hex socket screw (4)
1、Hot Air Blower Connector 2、Long Hex Socket Screw 3、Hot Air Blower Bracket
4、Long Hex socket Screw 5、Hot Air Blower 6、Long Philips Screw
7、Air Duct 8、High Temperature Gasket
9、Heating Element
10、Outer Cover
Dual Heating/Single Heating/Granules EN
Replacement of Drive Motor
LESITE
Loosen the fastening bolt (A) (1), remove the thrust bearing seat (3) and the
drive motor (9) in order
Loosen the fastening bolt (B)(2) and remove the thrust bearing seat (3) from the drive
motor connecting seat (5)
Once loosening fastening bolt (C) (4) and fastening bolt (D) (7), remove the connecting
seat (5) of the drive motor (9) and the handle fixing ring (6) from the drive motor (9)
Loosen the connecting nut (8) and remove the drive motor (9)
Screw the connecting nut (8) to the new drive motor (9)
Using fastening bolt(C)(4) and fastening bolt(D)(7) to fix the connecting seat (5) and
handle fixing ring (6) to the drive motor (9)
Using fastening bolt (B)(2) to fix the thrust bearing seat (3) to the connecting
seat (5)
Install and fix the thrust bearing seat (3) and drive motor (9) by using fastening bolt (A)(1)
1、Fastening Bolt (A) 3、Thrust Bearing Seat
5、Drive Motor Connecting Seat
2、Fastening Bolt (B)
4、Fastening Bolt (C) 6、Handle Fixing Ring
8、Connecting Nut7、Fastening Bolt (D) 9、Drive Motor
Dual Heating/Single Heating/Granules EN
Fault Code
LESITE
LST610A/B/C/E
LST600A/B/C/E/F
LST610A/B/C
LST600A/B/C
LST620
LST610A/B/C/E/F
LST600A/B/C/E/F
LST620
LST610A/B/C/E/F
LST600A/B/C/E/F
LST620
LST610A/B/C
LST600A/B/C
LST620
LST610A/B/C/E
LST620
Plug in without any
action
Hot air blower is working
properly but
control box display is off
Hot air blower does
not work but
control box is
working properly
Hot air blower does
not heat up
The control box appears
ok but can not heat up
The drive motor fault
lamp flashes slowly
Check whether the input power
supply and power cord are in good
condition
Check control box switch
Check fuse of control box
Check high-voltage protective varistor
Check whether the connection
between the hot air blower and the
control box is in good condition
Check whether the hot air blower
power switch is damaged
Check whether the carbon brush of
hot air blower motor is depleted
Check whether the motor is burned
out
Check whether the heating element
is damaged
Check whether the potentiometer of
air blower is damaged
Check whether the spring
heating coil is damaged
The motor carbon brush is depleted
and the carbon brush needs to be
replaced.
Dual Heating/Single Heating/Granules EN
Fault Code
LESITE
LST610A/B/C/E
LST620
LST610A/B/C/E
LST620
The drive motor fault
lamp flashes fastly
The power supply is in poor contact
or the power cord is damaged
The drive motor
fault lamp keeps on Drive motor overtemperature problem
Error code ER1 The spring heating coil thermocou-
ple has problem
Error code ER2
Error code ER3
Error code ER4
The spring heating coil is overtem-
perature
Drive motor overtemperature problem
The drive motor thermocouple has
problem
LST600A/B/C
LST620
LST600A/B/C
LST620
LST610A/B/C
LST600A/B/C
LST620
LST610A/C
LST600A/C
LST620
Dual Heating/Single Heating/Granules EN
LESITE
Maintenance
· The air filter should be cleaned with a brush when soiled
· For each replacement of welding shoe, clean the extruder nozzle and remove welding
residue
· Check power connection and plug for breakage or mechanical damage
· The air duct should be cleaned regularly
· Repairs can only be carried out by professional Lesite service station to ensure professional
and reliable maintenance service within 24 hours according to circuit diagram and spare parts
list
Air filter are cleaned regularly to
prevent clogging
4-5 gears are recommended
Air filter are cleaned
regularly to prevent
clogging
1.2 The knob is strictly
prohibited to touch
Dual Heating/Single Heating/Granules EN
LESITE
Warranty
Maintenance
· This product guarantees a 12-month liability period from the day it is sold to consumers.
We will be responsible for failures caused by material or manufacturing defects. We
will repair or replace defective parts at our sole discretion to meet the warranty
requirements.
· The quality assurance does not include damage to wearing parts (heating elements,
carbon brushes, bearings, etc.), damage or defects caused by improper handling or
maintenance, and damage caused by falling products. Irregular use and unauthorized
modification should not be covered by the warranty.
· It is strongly recommended to send the product to Lesite company or
authorized repair center for professional inspection and repair.
· Only original Lesite spare parts are allowed.
1
Add: 5# Jingpu Road, Pushang Industry Park,
Cangshan, Fuzhou, 350007, Fujian, China
Tel：+86(591)83818890
E-mail：info@lesite.com.cn
Web：www.lesiteweld.com
LST Plastic Extrusion Welder 06/2021-EN
This manual suits for next models
9
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