1. Uvod
This manual provides essential information for the safe and effective operation, setup, maintenance, and troubleshooting of your Telwin Linear 340-819020 MMA DC Welding Machine. Please read this manual thoroughly before using the machine to ensure proper handling and to prevent injury or damage.

Figure 1: Telwin Linear 340-819020 Welding Machine. This image shows the overall view of the red and black welding machine with its control panel and wheels.
2. Sigurnosne informacije
Welding operations involve significant risks. Always adhere to safety precautions to prevent electric shock, burns, fire, and exposure to fumes. This machine is designed for Manual Metal Arc (MMA) welding.
- Električni šok: Osigurajte da je mašina pravilno uzemljena. Ne dodirujte električne dijelove pod naponom. Nosite suhe rukavice za zavarivanje.
- Isparenja i gasovi: Radite u dobro prozračenom prostoru. Po potrebi koristite usisavanje dima.
- lučni zraci: Zaštitite oči i kožu od lučnog zračenja. Koristite zavarivačku masku s odgovarajućom zaštitnom odjećom i zaštitnim poklopcem.
- Požar i eksplozije: Držite zapaljive materijale dalje od područja zavarivanja. Imajte aparat za gašenje požara pri ruci.
- Opekline: Vrući metal i oprema mogu uzrokovati teške opekotine. Nosite zaštitnu odjeću, rukavice i obuću.
3. Podešavanje
3.1 Raspakivanje i pregled
Carefully remove the welding machine from its packaging. Inspect the machine for any signs of damage that may have occurred during transit. Ensure all components listed in the packing list are present. If any damage or missing parts are found, contact your supplier immediately.
3.2 Priključak za napajanje
The Telwin Linear 340-819020 operates on a 230-400V power supply. Ensure your power source matches these requirements. Connect the machine to a suitable power outlet using the provided cord. Verify that the power circuit is adequately protected by a fuse or circuit breaker.
3.3 Electrode Holder Connection
Connect the electrode holder cable to the appropriate terminal on the welding machine. For DC welding, the polarity depends on the electrode type and welding application. Consult your electrode manufacturer's recommendations for correct polarity.
3.4 Prizemni Clamp Veza
Pričvrstite uzemljenje clamp cable to the workpiece. Ensure a clean, solid electrical connection to the base metal to facilitate a stable arc. A poor ground connection can lead to an unstable arc and poor weld quality.

Figure 2: Close-up of the Telwin Linear 340-819020 control panel. This image highlights the current adjustment knob and connection points.
4. Uputstvo za upotrebu
4.1 Uključivanje/isključivanje
To power on the machine, switch the main power switch to the 'ON' position. The indicator light will illuminate. To power off, switch the main power switch to the 'OFF' position.
4.2 Podešavanje struje
The Telwin Linear 340-819020 features stepless regulation of the welding current. Use the adjustment knob on the front panel to set the desired welding current. Refer to the electrode manufacturer's recommendations for appropriate current settings based on electrode diameter and material thickness.
4.3 Electrode Selection
This machine is compatible with a wide range of electrodes, including rutile, basic, stainless steel, cast iron, and aluminum electrodes. Select the appropriate electrode type and diameter for your specific welding application and material.
4.4 Proces zavarivanja
- Uvjerite se da je sva sigurnosna oprema nošena.
- Insert the chosen electrode into the electrode holder.
- Zapalite luk laganim dodirivanjem elektrode o radni komad i brzim podizanjem kako biste uspostavili luk.
- Održavajte konzistentnu dužinu luka i brzinu zavarivanja za optimalnu kvalitetu zavara.
- Nakon zavarivanja, ostavite radni komad da se ohladi prije rukovanja.
5. Održavanje
Redovno održavanje osigurava dugotrajnost i siguran rad vašeg aparata za zavarivanje.
- čišćenje: Periodically clean the machine's exterior with a dry cloth. Ensure ventilation openings are free from dust and debris. Use compressed air to clean internal components if necessary, ensuring the machine is unplugged.
- Inspekcija kablova: Redovno provjeravajte sve kablove za zavarivanje, držač elektrode i uzemljenje.amp for damage, cuts, or loose connections. Replace damaged cables immediately.
- Skladištenje: Store the welding machine in a dry, clean environment, away from direct sunlight and extreme temperatures.
6. Otkrivanje problema
| Problem | Mogući uzrok | Rješenje |
|---|---|---|
| Nema luka ili slab luk | Poor ground connection, incorrect current setting, damp electrode, power supply issue. | Provjerite uzemljenje clamp connection, adjust current, dry electrodes, verify power supply. |
| Mašina se pregreva | Prekoračenje radnog ciklusa, blokirana ventilacija. | Allow machine to cool, clear ventilation openings, reduce welding time. |
| Loš kvalitet zavara | Incorrect current, wrong electrode, improper technique, dirty workpiece. | Adjust current, select correct electrode, refine welding technique, clean workpiece. |
7. Specifikacije
| Feature | Detalj |
|---|---|
| Proizvođač | Telwin |
| Broj modela | 819020 |
| Težina artikla | 80 kilograma |
| Dimenzije proizvoda | 46 x 89 x 59 cm |
| Boja | Crvena/Crna |
| Vrsta izvora napajanja | Corded Electric |
| Voltage | 240 Volts (Input 230-400V) |
| Wattage | 11.5 Kilowatts (Max Power 7 kW) |
| Uključene komponente | Samo uređaj |
| Baterije uključene | br |
| Baterije su potrebne | br |
8. Garancija i podrška
For warranty information and technical support, please refer to the documentation provided with your purchase or contact Telwin customer service directly. Keep your proof of purchase for warranty claims.

Figure 3: Telwin brand logo. This image displays the official logo of the manufacturer, Telwin.