LESITE LST700 User manual

LST700
Geo Hot Air Welder
Manual
Lesite Technology
LESITE

LST700
Please read this manual carefully before using this machine,
and keep it for future reference.
Application
Precautions
LESITE
01
- Solid Waste Landfills - Chemical Mining
- Sewage Treatment - Water Conservancy
- Anti-seepage Project - Aquaculture
EN
Unplug the welder before disassembling it to avoid of being hurt by
exposed wires or component inside the machine with power.
Incorrect operation may cause fire and explosion hazard because of high
temperature, especially near combustible materials and explosive gases.
Don’t touch heater tube and nozzle when they are hot. They may cause
burns. Don’t let hot air nozzle go towards people or animals.
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.
To ensure operator safety and reliable operation of equipment, the
power supply must be installed power supply and leakage protection
at the construction site.
The welding machine must be operated under the correct control of
the operator, otherwise it may cause combustion or explosion due to
hightemperature.
It is strictly forbidden to use the welding machine in water or muddy
ground, avoid soaking, rain or damp.

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5
7
8
4
3
12
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10
9
21
19
15
18
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14
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20
11
2
1
16
Main Parts
02
1、Rocker Arm
2、Pressure Adjusting Nut
3、Cam
4、Speed Reduction Box
5、Control Box
6、Handle
7、Handle Case
8、Hot air Blower
9、Nozzle Protector
10、Nozzle
11、Bottom Transmission Frame
12、Pressure Roller
13、Bottom Roller Bearing
14、Pressure Handle
15、Thermocouple
16、Upper Pressing Whee
17、Back Creeping Roller
18、Bottom Pressing Roller
19、Ahead Creeping Rolle
20、Thermocouple Joint
21、Main Power Wire
22、Hot Air Blower Power Wire
LST700
LESITE
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LST700 Control Panel
23、Temperature LCD Display 24、Temperature Drop Knob
25、Temperature Rise Knob 26、ON/OFF Switch
27、Power Fuse 28、Speed LCD Display
29、Speed Increase Knob 30、Speed Down Knob
31、Motor Fuse 32、Moving Switch
23 28
29
30
31
32
25
27
24
26
03
LST700
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LST700 Operations
LST700 Parameters Setting
1、Please lift the pressure handle (14) to separate the upper and down pressure
roller (12), switch the power on.
2、Setting the welding parameters according to the data of welding test.
3、Please wait the actual temperature value reaching the setting value.
4、Put the welder at the welding position and put the two films (one up and the other
one down) into the machine.
5、Press down the pressure handle (14) to make the upper and down pressure roller (12)
fit completely. Then turn on the moving switch (31), the machine starts walking and
welding automatically.
6、To observe the relative position of the welding seam and the edge of the welded
membrane at any time. It must be promptly corrected if there is deviation.
7、When the welder finish welding job,its pressures handle needs to be lifted to separate
the upper and down pressure roller in time.
8、After completion of the welding work, press the buttons (24) and (25) on the panel
to make the hot air blower in a cold blowing condition in order to cool the nozzle.
9、Power off.
04
1、Welding temperature:
Press the buttons on the panel to set the required welding temperature ,
which depends on the welding material and ambient temperature. The LCD screen
will display the preset temperature and the current actual temperature.
2. Welding speed：
Press the buttons on the panel to set the required welding speed,which
matchs the welding temperature.The LCD screen will display the preset speed and the
current actual speed.
3、Welding pressure:
It can change the welding pressure by rotating the pressure adjusting nut. To reduce
the pressure in a clockwise direction, and increase the pressure in a counterclockwise
direction.
● The machine has a memory function parameters, namely when you use the welder
next time, the welder will automatically show the last set of parameters without
reseting parameters.
LST700
LESITE
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LST700 Parameter
Model LST700
Voltage
Frequency
power
Temperature
Welding Speed
Thickness Of Materials
Welding Width
Overlap Width
Seam Strength
Weight
Size( L*W*H)
230 / 120 V
50 / 60 Hz
2800 / 2200 W
50～620 ℃
0.5～3.5 m/min
0.5～2.0 mm (single layer thickness)
15mm×2 cavity 15mm
160 mm
≥85% parent material
7.5Kg
352×267×267 mm
05
LST700
LESITE
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LST700 Nameplate
LST700 Boot Steps
1、ON/OFF switch (27) is used for turning on the main power of the welder.
2、Turn on ON/OFF switch (27), LCD display shows as Fig 1,the hot air blower
blows cold air without heating.
3、Press the button (25) and(24), the screen shows as Figure 2 and the hot air blower
starts to heat until reach the setting temperature.
06
Fig 1
CT 016℃
ST -Pause
CV: .OM
SV: 5.0M
Current Temp Current Speed
Setting Speed
Fig 2
CT: 501℃
ST: 510℃
CV: .OM
SV: 5.0M
Current Temp
Setting Temp
Current Speed
Setting Speed
LST700
LESITE
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The model identification and serial number identification are marked on
the nameplate of the machine you choose.
Please provide these data when consulting Lesite Sales and Service Center.

LST700 Boot Steps
Parts Replacement
1、Replacement of heating element：
Unplug the thermocouple connector ,Loosen the four fixing screws of nozzle.
Then you can remove the heating element after removing the nozzle As shown on
the right:
2、Replacement of thermocouple：
Unplug the thermocouple connector ,loosen the fixing wire in the nozzle protector,
then thermocouple can be removed.
07
4、If press the bottoms (25) and (24) at the same time, LCD display shows as Fig 1,
the hot air blower blows cold air without heating.
5、When the welding nozzle is at the right position, press the moving switch (31) and
the welder starts to move and weld. It will stop move if you press the moving
switch again.
6、When the welder starts to move, the LCD display shows as Fig 3.
Fig 3
CT: 501℃
ST: 510℃
CV: 5.0M
SV: 5.0M
Current Temp
Setting Temp
Current Speed
Setting Speed
LST700
LESITE
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Fault Diagnosis And Solved Ways
Use steel brush to clean the hot air nozzle
Clean the air inlet at the back of the hot air blower
Fault
Motor cannot
work
Caused Solutions
No power
Fuse burns
Speed control board burns
Motor burns
Check the power and connect it
Replace new fuse
Replace new control board
Replace new motor
Routine Maintenance
08
LST700
LESITE
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Quality Assurance
Standards
· This product guarantees a 12-month shelf life 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.
09
LST700
LESITE
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The company declares that the products manufactured and marketed by the company
meet the requirements of the following enterprise implementation standards.
Standards：Q/350100LST 001.

Repairs and Spare Parts
· 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.
10
LST700
LESITE
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1
One year
warranty

Lesite Geo Hot Air Welder 05/2022-EN
FUZHOU LESITE PLASTICS WELDING TECHNOLOGY CO.,LTD
Add: 5# Jingpu Road, Pushang Industry Park,
Cangshan, Fuzhou, 350007, Fujian, China
Tel：[phone]
E-mail：[e-mail]
Web：www.lesiteweld.com