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INSTRUCTIONS FOR USE
UNIFIRE 26C
MANUAL PORTABLE PLASMA CUTTING SYSTEM WITH BUILT IN CO MPRESSOR
TO THE OPERATOR: PLEASE READ AND UNDERSTAND THIS MANUAL
BEFORE USING THE SYSTEM. IT IS ABSOLUTELY VITAL TO KNOW THE
INFORMATION PRESENTED IN THIS MANUAL IN ORDER TO USE THE
MACHINES IN THE BEST WAY.
WITH THIS KNOWLEDGE AND A PROFESSIONAL APPROACH, YOU WILL BE
ABLE TO SOLVE MANY COMPLICATED CUTTING APPLICATIONS WITH THESE
SYSTEMS.
Rev. 1.0, 2015-06-12
STATE OF THE ARC PLASMA CUTTING TECHNOLOGY
SPT Plasmateknik AB
Visiting address:
Telephone
046-18 48 00
Box 4137
Höstbruksvägen 14
Telefax
046-18 48 09
SE-227 22 LUND
SE-226 60 LUND
Email
info@spt.se
Sweden
Sweden
Internet
www.spt.se
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CONTENTS
Page
1. TECHNICAL DATA 3
2. INSTALLATION 4
3. OPERATING INSTRUCTIONS 5
4. CHANGING CONSUMABLES 6
5. MAINTENANCE 7
6. TROUBLE SHOOTING 8
7. SAFETY INSTRUCTIONS 9
8. WARRANTY 13
9. SCRAPPING 13
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1. Technical data
Unifire 26C
Power supply 230 V, 1~50 Hz
Mains fuse 16 A slow blow
Maximum power 3,5 kVA
Process power 95 V, 5-25 A
Duty cycle @ 40°C 25%
Power factor 0,95
Open circuit voltage 424 VDC
Protection class IP 23
Cooling F
Temperature class F
Dimensions LxWxH 390x225x360
Weight 13 kg
Maximum cutting capacity 8 mm
Quality cut 6 mm
Pressure/flow built-in compressor.
2. Power supply connection.
Connect the machine to 1-Phase, 50 Hz, 230 V 16A slow blow only.
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3. Operating instructions
Check that the machine has been properly connected to power supply.
Check that the torch is fitted with appropriate consumables for the job at hand.
Connect the earth lead clamp directly at the work piece, ensuring that a good contact is
obtained. If necessary, clean the surface from paint, rust, dirt, etc.
Cutting
• Switch the machine’s main power switch ON.
The READY lamp will light and the fan will start working.
• Choose process power, 5-25 A. Check that the consumables in the torch match
the current setting.
• Manoeuvre the torch in position for cutting.
• Press the START-switch on the torch handle.
The pilot arc will burn for a few seconds. If contact with the work piece is not
obtanined within this time, the pilot arc goes out. Then make a new try.
• To end the process, release the START-switch. The plasma arc goes out
instantaneously. Air will continue to flow for about 30 seconds.
NOTE! When the machine is not in use or is only working at long intervals, switch off the
machine. It contains mechanical components that should not be exposed to unnecessary wear.
It also protects against unvoluntarily firing the pilot arc.
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4. CHANGING CONSUMABLES
Removing the consumables.
1. Switch off the machine.
2. Unscrew the protective cap (6).
3. Remove the nozzle (4/5) and the swirl ring (3).
4. Unscrew the electrode (1/2) with the special tool that is delivered with the machine.
Replacing the consumables.
1. Mount the electrode (1/2) with the special tool.
2. Mount the swirl ring (3) and the nozzle (4/5).
3. Mount the protective cap (6).
4. Switch the machine on.
Part. No Denomination
454057 UNIFIRE 26C med 4 m PTA 25
899315 Torch body PTA 25
899302 Electrode
899304 Swirl ring
899305 Nozzle 0.65 5-20A
899306 Nozzle 0.8 15-30A
899308 Protective cap UF 26C
899309 Protective cap UF 31 PFC
899310 Distance cutting guide
899311 Circle cutting guide PTA 25
899313 Handle PTA 25
899314 Button PTA 25
899312 Hose parcel PTA 25 4m
899015 Consumable tool
899301 Torch PTA 25 4m
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5. MAINTENANCE
DAILY
Inspect and, if necessary, change the torch consumable parts.
Carefully inspect the hose assembly and torch body with regard to any leak or damage. Never
use a damaged torch.
EVERY SIX MONTHS
Disconnect the machine from electicity. Remove the cover. Clean the machine with dry, clean
and oil free compressed air. Inspect cable connections and gas system.
Remove and clean or exchange the compressor intake filter.
In unusually dirty environments this procedure should be carried out every month.
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6. TROUBLE SHOOTING.
The machine delivers no power.
The green working indicator is
on. The thermal protection
indicator is continuously on.
The thermal protection of the
plasma unit is on.
Wait until the end of the cooling
phase.
The machine delivers no power.
The green working indicator is
on. The thermal protection
indicator blinks 2 times then
lights off
The input voltage is higher than
230V + 15%.
Check your electrical network or
your electric generator then
switch off and on your machine.
The machine delivers no power.
The green working indicator is
on.
The thermal protection
indicator blinks quickly.
Torch defect.
Check your torch assembly and
consumables.
By pressing the trigger, the air
flows but the pilot arc is not
working.
Consumables damaged.
Check and change the
consumables, then switch off
and on your machine.
The electrical arc switches off
after about 3 seconds.
Earth problem.
Check the earth clamp is well
connected to a clean area of the
part to cut.
If the pilot arc does not strike:
• Check consumables and torch.
If the pilot arc is unstable:
• Check the compressors intake filter and clean change if necessary.
Inferior cut quality or performance:
• Check the torch consumables. Replace if necessary.
• Inspect the torch body and hose assembly with regard to any damage or leak.
• Check the compressors intake filter and clean change if necessary.
• Check the earth lead connection. Place the earth lead clamp directly on the work
piece. If necessary, clean from paint, dirt, rust etc.
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7. SAFETY INSTRUCTIONS
All endangerments through plasma cutting are related with the process itself. Endangerments
may occur due to:
- High contact voltage
- HV ignition
- Electromagnetic interferences
- Heat and light radiation
- Gases, fumes and smoke
- Noise
- Hot metal and spatter
- Handling of pressure cylinders
The Plasma Cutting Machine has been developed in conformity with following standards:
• EN 60974-1 safety requirements for installations for arc welding and welding power
sources
• EN 60974-10 electromagnetic compatibility
Before starting the Plasma Cutting Machine carefully read this Instruction Manual. Only
advised personnel are allowed to operate the plasma installation!
Endangerment due to high contact voltage
Warning!
Before opening the plasma rectifier generally the input power has to be disconnected
physically from the mains (unplug mains cable)! Only advised personnel are allowed to
carry out any repairs to the machine.
Attention! Connect the work piece cable and earth the workplace before starting the
machine!
The power source is equipped with a cooling unit and there is an electric potential between the
housing and work piece in case the work piece isn't earthed and the machine is switched on.
Because of the high resistance of more than 10 kOhm in the coolant the contact voltage is
absolute not dangerous but sensible.
Special hints:
- Connect power source only to correctly earthed mains socket with proper connected
safety conductor
- Wear insulating protective clothing (safety shoes, leather apron, gloves), place torch
on insulated holder,
- Wear cutting area and plasma machine components dry and clean, arrange regular
inspections, never shorten safety circuits.
Working under elevated electrical endangerment
This plasma cutting machine in conformity with valid standards (EN 60974-1) can be used for
operation under elevated electrical endangerment
• The power source and the plasma torches are forming a safety-proofed installation which
can be separated only by using tools.
• The patented design of the torch prevents electrical danger when the torch consumables are
disassembled.
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Therefore the power source is marked with the S-sign and operation under enhanced electrical
endangerment is allowed.
Attention! Always follow the local safety rules!
Endangerment through high voltage (HV)
A HV-igniter starts the pilot arc. The HV-supply is cut-off automatically after pilot arc has
struck.
Attention! Never touch nozzle or nozzle cap when power source is switched ON!
HV-ignition may establish electromagnetic fields and can influence:
- heart pace-makers
- electronic devices
Endangerment through electromagnetic i nterferences
The plasma cutting unit is in conformity with the conditions of the EN 50199
“Electromagnetic compatibility”. This standard is valid for arc welding and related processes
(plasma cutting) that come in use in commercial and private fields.
Warning!
Special precautions may be required if the plasma unit is used in private fields (for instance
screened cables etc.)
The user takes the full risk when installing and using the machine. He has to follow strictly the
instructions of the supplier. If electromagnetic interferences are noticed the user is to contact
the producer to solve the problem.
Recommendations to classify the environment (EN 50199):
Before the installation takes place the user has to value the environment for electromagnetic
problems and to take into consideration:
- Other mains supplies, control cables, signal and telecommunication lines along, above,
below or beside the installation
- Broadcasting or television installations
- Computers or other controls
- Safety devices, protection circuits
- The health of people in the area (heart pace makers, hearing aids etc.)
- Devices for measuring and calibrating
- The noise immunity of equipment around the installation, so that they are compatible
with electromagnetic interferences. Special measures may be required.
- The time of day that plasma cutting is performed
Recommendations to minimise interferences:
If interferences take place, the following should be done:
- Apply filter for mains connection
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- Screening of mains cable of the plasma installation (safe contact between screen and
housing required)
- Constant maintenance
- Always keep cover plates and doors of the plasma machines closed
- Avoid excessive length of cutting cables
- Arrange potential equalisation between metallic parts around the installation (the
operator has to be insulated from those parts)
- Earthing of the work piece
- Selective screening of other cables and installations
Endangerment through heat and light radiation
The plasma arc produces intense ultraviolet and infrared radiation that can hurt the eyes and
skin. Therefore the following precautions have to be arranged:
- Wearing of flame-retardant welding clothes (helmet, apron, gloves, safety shoes)
- Hand or head shield with protective glasses of medium shade for watching the cutting
process
- Preparing the cutting area so that reflection and transmission of ultraviolet light is
reduced:
-painting of walls in dark colour
-use of protective walls and screens
Endangerment through fumes and smoke
Due to the plasma process itself hazardous substances may be produced. To avoid risks on
health the following has to be done:
- Keep cutting place well ventilated
- Remove fumes and smoke by exhaustion devices
- Remove all chlorinated and other solvents from the cutting area. They could form
phosgene gas when exposed to ultraviolet radiation
- Wear a breathing mask when cutting galvanised materials
- Ensure that toxic limits are not exceeded
Endangerment through noise
Be aware that during plasma cutting a high noise level arises.
Cutting current
Thickness
Noise level in distance of
0,5 m
1,0 m
No load
56dB(A)
80A
4mm
82 dB(A)
79 dB(A)
160A
l6mm
86 dB(A)
83 dB(A)
240A
l6mm
96 dB(A)
92 dB(A)
Above levels are general. Variations may occur.
Therefore wear proper ear protection.
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Endangerment through spatter
During plasma cutting sparks, slag and hot metal are produced. The risk of burns and fire
exists! To avoid these endangerments the following has to be advised:
- remove all potential flammable materials from cutting area, at least in a 10 m distance
- cool down freshly cut material before handling
- make fire extinguisher available in the cutting area
Handling of pressure cylinders
In some cases compressed gases are required for the plasma cutting process. To avoid
endangerments the following has to advised:
- Place cylinders upright in secured position
- Never use damaged cylinders, pressure reducers and armatures
- Use pressure reducers only for the gas it is determined
- Never lubricate pressure reducers with grease or oil
- All parts coming in contact with oxygen must be free from oil and grease
- When using oxygen and/or flammable gases the pressure reducer has to be equipped
with an explosive-proofed device (backfire-device)
- Regularly check the gas hoses and other equipment for leaks etc.
- Always follow regulation regarding gas equipment
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8. WARRANTY
SPT Plasmat eknik A B grants a warranty for its prod ucts. The war ranty covers damage caused
by faulty raw material or production errors. A faulty part will be replaced by a new one, or, if
possible, we will repair the faulty part without cost.
The warranty period is 2 years provided the machine is used under normal conditions (one
shift working). The torch is not covered by the warranty.
The warranty does not cover damage caused by improper or careless handling, connection to
the wrong supply voltage including voltage or frequency variations outside the specifications,
overload, irresponsible maintenance or natural wear.
Any use of non-original parts or consumables renders the warranty void.
Travel costs in connection with warranty repairs or freight and packaging costs are not
included in the warranty.
Warranty repairs may only be performed by SPT Plasmateknik AB or a representative
assigned by SPT.
9. SCRAPPING
Do not throw electrical equipment in the regular rubbish! According to
EU-directive 2002/96/EG regarding waste that contains electric or
electronic parts (WEEE) and its implementation with national laws
products must be collected separately and brought to approved
recycling facilities after their useful life. As the owner of the product
you should find out the location of an approved recycling facility from
your local dealer.
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