Saf-Fro PRESTO 275 Manual de usuario

IM3137

02/2022

REV01

PRESTO 275

OPERATOR’S MANUAL

ENGLISH

Lincoln Electric Bester Sp. z o.o.

ul. Jana III Sobieskiego 19A, 58-260 Bielawa, Poland

English I English

12/05

THANK YOU! For choosing the QUALITY of the Lincoln Electric products.

Please check packaging and equipment for damage. Claims for material damaged in shipment must be notified

immediately to the dealer.

For ease of use, please enter your product identification data in the table below. Model Name, Code & Serial Number

can be found on the machine rating plate.

Model Name:

………………...…………………………….…………………………………………………………………………………………..

Code & Serial number:

………………….……………………………………………….. …………………………………………………….……………..

Date & Where Purchased:

…………………………………………………………………... ……………………….…………………………………………..

INDEX

Technical Specifications...................................................................................................................................................... 1

ECO design information ...................................................................................................................................................... 2

Electromagnetic Compatibility (EMC).................................................................................................................................. 4

Safety.................................................................................................................................................................................. 5

Introduction ......................................................................................................................................................................... 7

Installation and Operator Instructions.................................................................................................................................. 7

WEEE ............................................................................................................................................................................... 18

Spare Parts ....................................................................................................................................................................... 18

REACh .............................................................................................................................................................................. 18

Authorized Service Shops Location .................................................................................................................................. 18

Electrical Schematic.......................................................................................................................................................... 18

Accessories....................................................................................................................................................................... 19

English 1 English

Technical Specifications

NAME INDEX

PRESTO 275 W100000001

INPUT

Input Voltage U1EMC Class

PRESTO 275

400V +/- 15% 3 phases A

I1eff I

1max

9.8A 15,3A

PRESTO 275

Input Power at Rated Cycle Input Amperes I1max PF (400V)

7,1 kVA (@100%) 10,1A 0,79

9,1 kVA (@60%) 12,9A 0,85

11 kVA (@25%) 15,3A 0,89

RATED OUTPUT

Duty Cycle 40°C

(based on a 10 min. period) Output Current I2

GTAW

100% 200A

60% 230A

40% 270A

SMAW

100% 180A

60% 230A

25% 270A

OUTPUT RANGE

Welding Current Range Peak Open Circuit Voltage U0

GTAW 5 - 270A 70V

SMAW 5 - 270A

RECOMMENDED INPUT CABLE AND FUSE SIZES

Fuse Type gR or Circuit Breaker Type Z Power Lead

PRESTO 275 16A, 400V AC 4 Conductors, 1,5mm2

DIMENSIONS AND WEIGHT

Weight Height Width Length

PRESTO 275 14,1Kg 360 mm 230 mm 498 mm

Protection Rating Maximum Gas Pressure

PRESTO 275

IP23 0,5 MPa (5 bar)

Operating Temperature Storage Temperature

from -10°C to +40°C from -25°C to +55°C

English 2 English

ECO design information

The equipment has been designed in order to be compliant with the Directive 2009/125/EC and the Regulation

2019/1784/EU.

Efficiency and idle power consumption:

Index Name Efficiency when max power

consumption / Idle power consumption Equivalent model

W100000001 PRESTO 275 85% / 19W No equivalent model

Idle state occurs under the condition specified in below table

IDLE STATE

Condition Presence

MIG mode

TIG mode X

STICK mode

After 30 minutes of non-working X

Fan off X

The value of efficiency and consumption in idle state have been measured by method and conditions defined in the product

standard EN 60974-1:20XX.

Manufacturer’s name, product name, code number, product number, serial number and date of production can be read from

rating plate.

XXXXXXXXXX

Code: XXXXX XXXXXX-X

S/N: P1YYMMXXXXX

P1 YY MM XXXXX

5A5A 5B 5D5C

XXXXXXX

Where:

1- Manufacturer name and address

2- Product name

3- Code number

4- Product number

5- Serial number

5A- country of production

5B- year of production

5C- month of production

5D- progressive number different for each machine

English 3 English

Typical gas usage for MIG/MAG equipment:

Material type

Wire

diameter

[mm]

DC electrode positive Wire Feeding

[m/min] Shielding Gas Gas flow

[l/min]

Current

[A]

Voltage

[V]

Carbon, low

alloy steel 0,9 ÷ 1,1 95 ÷ 200 18 ÷ 22 3,5 – 6,5 Ar 75%, CO225% 12

Aluminium 0,8 ÷ 1,6 90 ÷ 240 18 ÷ 26 5,5 – 9,5 Argon 14 ÷ 19

Austenic

stainless steel 0,8 ÷ 1,6 85 ÷ 300 21 ÷ 28 3 - 7 Ar 98%, O22% /

He 90%, Ar 7,5% CO22,5% 14 ÷ 16

Copper alloy 0,9 ÷ 1,6 175 ÷ 385 23 ÷ 26 6 - 11 Argon 12 ÷ 16

Magnesium 1,6 ÷ 2,4 70 ÷ 335 16 ÷ 26 4 - 15 Argon 24 ÷ 28

Tig Process:

In TIG welding process, gas usage depends on cross-sectional area of the nozzle. For commonly used torches:

Helium: 14-24 l/min

Argon: 7-16 l/min

Notice: Excessive flow rates causes turbulence in the gas stream which may aspirate atmospheric contamination into the

welding pool.

Notice: A cross wind or draft moving can disrupt the shielding gas coverage, in the interest of saving of protective gas use

screen to block air flow.

End of life

At end of life of product, it has to be disposal for recycling in accordance with Directive 2012/19/EU (WEEE), information

about the dismantling of product and Critical Raw Material (CRM) present in the product, can be found at

https://www.lincolnelectric.com/en-gb/support/Pages/operator-manuals-eu.aspx

English 4 English

Electromagnetic Compatibility (EMC)

01/11

This machine has been designed in accordance with all relevant directives and standards. However, it may still generate

electromagnetic disturbances that can affect other systems like telecommunications (telephone, radio, and television) or

other safety systems. These disturbances can cause safety problems in the affected systems. Read and understand this

section to eliminate or reduce the amount of electromagnetic disturbance generated by this machine.

This machine has been designed to operate in an industrial area. To operate in a domestic area it is necessary

to observe particular precautions to eliminate possible electromagnetic disturbances. The operator must install

and operate this equipment as described in this manual. If any electromagnetic disturbances are detected the

operator must put in place corrective actions to eliminate these disturbances, if necessary with assistance from

Lincoln Electric.

WARNING

Provided that the public low voltage system impedance at the point of common coupling is lower than:

64,8mΩfor the PRESTO 275

This equipment is compliant with IEC 61000-3-11 and IEC 61000-3-12 and can be connected to public low voltage systems.

It is the responsibility of the installer or user of the equipment to ensure, by consultation with the distribution network

operator if necessary, that the system impedance complies with the impedance restrictions.

Before installing the machine, the operator must check the work area for any devices that may malfunction because of

electromagnetic disturbances. Consider the following.

Input and output cables, control cables, and telephone cables that are in or adjacent to the work area and the machine.

Radio and/or television transmitters and receivers. Computers or computer controlled equipment.

Safety and control equipment for industrial processes. Equipment for calibration and measurement.

Personal medical devices like pacemakers and hearing aids.

Check the electromagnetic immunity for equipment operating in or near the work area. The operator must be sure that

all equipment in the area is compatible. This may require additional protection measures.

The dimensions of the work area to consider will depend on the construction of the area and other activities that are

taking place.

Consider the following guidelines to reduce electromagnetic emissions from the machine.

Connect the machine to the input supply according to this manual. If disturbances occur if may be necessary to take

additional precautions such as filtering the input supply.

The output cables should be as short as possible and positioned together as close as possible to each other. If possible

connect the work piece to ground in order to reduce the electromagnetic emissions. The operator must check that

connecting the work piece to ground does not cause problems or unsafe operating conditions for personnel and

equipment.

Shielding of cables in the work area can reduce electromagnetic emissions. This may be necessary for special

applications.

WARNING

EMC classification of this product is class A in accordance with electromagnetic compatibility standard EN 60974-10 which

means that the product is designed to be used in an industrial environment only.

WARNING

The Class A equipment is not intended for use in residential locations where the electrical power is provided by the public

low-voltage supply system. There may be potential difficulties in ensuring electromagnetic compatibility in those locations,

due to conducted as well as radiated disturbances.

English 5 English

Safety

01/11

WARNING

This equipment have to be used by qualified personnel. Be sure that all installation, operation, maintenance and repair

procedures are performed only by qualified person. Read and understand this manual before operating this equipment.

Failure to follow the instructions in this manual could cause serious personal injury, loss of life, or equipment damage. Read

and understand the following explanations of the warning symbols. Lincoln Electric is not responsible for damages caused

by improper installation, improper care or abnormal operation.

WARNING: This symbol indicates that instructions must be followed to avoid serious personal injury, loss

of life, or equipment damage. Protect yourself and others from possible serious injury or death.

READ AND UNDERSTAND INSTRUCTIONS: Read and understand this manual before operating this

equipment. Arc welding can be hazardous. Failure to follow the instructions in this manual could cause

serious personal injury, loss of life, or equipment damage.

ELECTRIC SHOCK CAN KILL: Welding equipment generates high voltages. Do not touch the electrode,

work clamp, or connected work pieces when this equipment is turned on. Insulate yourself from the

electrode, work clamp, and connected work pieces.

ELECTRICALLY POWERED EQUIPMENT: Turn off the input power using the disconnect switch at the

fuse box before working on this equipment. Ground this equipment in accordance with local electrical

regulations.

ELECTRICALLY POWERED EQUIPMENT: Regularly inspect the input, electrode, and work clamp

cables. If any insulation damage exists replace the cable immediately. Do not place the electrode holder

directly on the welding table or any other surface in contact with the work clamp to avoid the risk of

accidental arc ignition.

ELECTROMAGNETIC FIELD MAY BE DANGEROUS: Electric current flowing through any conductor

creates electromagnetic field (EMF). EMF fields may interfere with some pacemakers, and welders having

a pacemaker shall consult their physician before operating this equipment.

CE COMPLIANCE: This equipment complies with the European Community Directives.

ARTIFICIAL OPTICAL RADIATION: According with the requirements in 2006/25/EC Directive and

EN 12198 Standard, the equipment is a category 2. It makes mandatory the adoption of Personal

Protective Equipment (PPE) having filter with a protection degree up to a maximum of 15, as required by

EN169 Standard.

FUMES AND GASES CAN BE DANGEROUS: Welding may produce fumes and gases hazardous to

health. Avoid breathing these fumes and gases. To avoid these dangers the operator must use enough

ventilation or exhaust to keep fumes and gases away from the breathing zone.

ARC RAYS CAN BURN: Use a shield with the proper filter and cover plates to protect your eyes from

sparks and the rays of the arc when welding or observing. To protect the skin, use suitable clothing made

of durable, fireproof material. Protect other nearby personnel with suitable, non-flammable screening and

warn them not to watch the arc nor expose themselves to the arc.

English 6 English

WELDING SPARKS CAN CAUSE FIRE OR EXPLOSION: Remove fire hazards from the welding area

and have a fire extinguisher easily accessible. Welding sparks and hot materials from the welding process

can easily go through small cracks and openings to adjacent areas. Do not weld on any tanks, drums,

containers, or material until the proper steps have been taken to insure that no flammable or toxic vapors

will be present. Never use this equipment when flammable gases, vapors or flammable liquids are

present.

WELDED MATERIALS CAN BURN: Welding generates a large amount of heat. Hot surfaces and

materials in work area can cause serious burns. Use gloves and pliers when touching or moving

materials in the work area.

CYLINDER MAY EXPLODE IF DAMAGED: Use only certificate, compressed gas cylinders containing

the correct shielding gas for the process used and properly operating regulators designed for the gas and

pressure used. Always keep cylinders in an upright position securely chained to a fixed support. Do not

move or transport gas cylinders with the protection cap removed. Do not allow the electrode, electrode

holder, work clamp or any other electrically live part to touch a gas cylinder. Gas cylinders must be

located away from areas where they may be subjected to physical damage or the welding process

including sparks and heat sources.

MOVING PARTS ARE DANGEROUS: There are moving mechanical parts in this machine, which can

cause serious injury. Keep your hands, body and clothing away from those parts during machine starting,

operating and servicing.

SAFETY MARK: This equipment is suitable for supplying power for welding operations carried out in an

environment with increased risk of electric shock.

The manufacturer reserves the right to make changes and/or improvements in design without upgrade at the same time the

operator’s manual.

English 7 English

Introduction

PRESTO 275 is a SMAW and GTAW power source

The complete package contains:

Power source

USB with operator’s manual.

Recommended equipment, which can be bought by user,

was mentioned in the "Accessories" chapter.

Installation and Operator Instructions

Read this entire section before installation or operating the

machine.

Exploitation conditions

This machine can operate in harsh environments.

However, it is important to use the following simple

preventive measures that will ensure its long life and

reliable operation:

Do not place or operate this machine on a surface with

an incline higher than 15° from horizontal.

Do not use this machine for pipe thawing.

This machine must be located where there is free

circulation of clean air without restrictions for air

movement. Do not cover the machine with paper, cloth

or rags when switched on.

Dirt and dust that can be drawn into the machine

should be kept to a minimum.

This machine has a protection rating of IP23. Keep it

dry when possible and do not place it on wet ground

or in puddles.

Locate the machine away from radio controlled

machinery. Normal operation may adversely affect

the operation of nearby radio controlled machinery,

which may result in injury or equipment damage.

Read the section on electromagnetic compatibility in

this manual.

Do not operate in areas with an ambient temperature

greater than 40°C.

Duty cycle and Overheating

The duty cycle of a welding machine is the percentage of

time in a 10 minute cycle at which the welder can operate

the machine at rated welding current.

Example: 60% duty cycle:

Welding for 6 minutes. Break for 4 minutes.

Excessive extension of the duty cycle will cause the

thermal protection circuit to activate.

Minutes

or decrease

Duty Cycle

Input Supply Connection

WARNING

Only a qualified electrician can connect the welding

machine to the supply network. Installation had to be

made in accordance with the appropriate National

Electrical Code and local regulations.

Check the input voltage, phase and frequency supplied to

this machine before turning it on. Verify the connection of

ground wires from the machine to the input source. The

welding machine PRESTO 275 must be connected to a

correctly installed plug-in socket with an earth pin.

Input voltage is 400 Vac 50/60Hz. For more information

about input supply refer to the technical specification

section of this manual and to the rating plate of the

machine.

Make sure that the amount of mains power available from

the input supply is adequate for normal operation of the

machine. The necessary delayed fuse or circuit breaker

and cable sizes are indicated in the technical specification

section of this manual.

WARNING

The welding machine can be supplied from a power

generator of output power at least 30% larger than input

power of the welding machine.

WARNING

When powering the machine from a generator be sure to

turn off welder first, before generator is shut down, in

order to prevent damage to welder!

English 8 English

Controls and Operational Features

Front panel PRESTO 275

Figure 1

1. Output negative socket for the welding circuit

2. Output positive socket for the welding circuit: Socket

where TIG torch must be connected

3. Remote Control Connector Plug For connecting a

Remote Control Kit

4. User Interface: See „User Interface” section.

5. USB connector

Back panel PRESTO 275

Figure 2

1. Power switch

User Interface

Figure 3

1. Display: 5” TFT display shows welding processes

parameters.

2. Left button: Home & Back

3. Central Knob: Parameter access and validation by

pushing knob

4. Right Button: Access to specific parameter of the

current selected page.

Main Menu

Figure 4

In Main Menu, 3 selections are possible

GTAW: allow to enter in TIG Home Menu

SMAW: allow to enter in MMA Home Menu

Information: Entering in this section allow to the user

to configure various parameters of the power source.

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