DÖRR EcoGun 246 User manual

MSG00018EN, V02
N36200008V
www.durr.com
Operation manual
EcoGun 246
Manual spray boiler pistol

Information about the document
This document describes the correct han-
dling of the product.
nRead the document prior to every activity.
nPrepare the document for the application.
nPass on the product only together with
the complete documentation.
nAlways follow safety instructions, han-
dling instructions and specifications of
every kind.
nIllustrations can deviate from the tech-
nical construction.
Validity range of the document
This document describes the following prod-
ucts:
N36200008V
EcoGun 246
Hotline and Contact
If you have queries or would like technical
information, please contact your dealer or
sales partner.
06/2023
EcoGun 246 - MSG00018EN2/48

TABLE OF CONTENTS
1 Product overview.......................... 4
1.1 Overview................................ 4
1.2 Short description.................... 4
2 Safety............................................. 4
2.1 Presentation of Notes............. 4
2.2 Intended Use.......................... 5
2.3 Residual risks......................... 6
2.4 Staff qualification.................... 7
2.5 Personal protective equip-
ment....................................... 7
3 Transport, scope of supply and
storage........................................... 8
3.1 Scope of delivery.................... 8
3.2 Handling of
packaging material................. 8
3.3 Storage................................... 8
4 Assembly....................................... 8
4.1 Requirements for the
Installation point..................... 8
4.2 Assembly................................ 9
5 Commissioning............................. 9
6 Operation..................................... 11
6.1 Safety recommendations...... 11
6.2 General notes....................... 11
6.3 Selecting air cap................... 11
6.4 Changing the air cap............ 12
6.5 Alignment of the air cap........ 12
6.6 Guiding the spray gun.......... 13
6.7 Purging................................. 13
6.7.1 Safety recommendations... 13
6.7.2 General notes.................... 13
6.7.3 Purging spray gun............. 13
7 Cleaning....................................... 15
7.1 Safety recommendations...... 15
7.2 Cleaning............................... 16
8 Maintenance................................ 17
8.1 Maintenance schedule......... 17
8.2 Lubrication............................ 18
9 Faults............................................ 18
9.1 Safety recommendations ..... 18
9.2 Defects table........................ 20
9.3 Troubleshooting.................... 22
9.3.1 Replace needle and
nozzle................................ 22
9.3.2 Replace valve set.............. 24
9.3.3 Replace needle gland........ 27
10 Disassembly and Disposal......... 28
10.1 Safety recommendations.... 28
10.2 Disassembly....................... 29
10.3 Disposal ............................. 29
11 Technical data............................. 29
11.1 Weight................................ 29
11.2 Connections........................ 29
11.3 Operating conditions........... 29
11.4 Emissions........................... 29
11.5 Operating values................ 30
11.6 Compressed air quality....... 30
11.7 Type plate........................... 30
11.8 Materials used.................... 30
11.9 Operating and auxiliary
materials............................. 30
11.10 Material specification........... 30
12 Spare parts, tools and accesso-
ries................................................ 31
12.1 Spare parts......................... 31
12.2 Tools................................... 36
12.3 Accessories........................ 37
12.4 Order.................................. 44
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1 Product overview
1.1 Overview
Fig. 1: Overview
1 Air cap
2 Cap nut
3 Flat jet control
4 Air control
5 Material flow control
6 Air connection
7 Trigger
8 Material connection
1.2 Short description
The spray gun is intended for surface
coating. Compressed air is used to apply
material. The coating material is fed through
lines. The spray gun is handheld.
Use a suitable nozzle set with air cap,
depending on the requirement Ä 6.3
“Selecting air cap”.
The following factors influence the spray jet
and the result:
nAlignment of the air cap Ä 6.5 “Alignment
of the air cap”
nMaterial flow Ä 5 “Commissioning”
nAir pressure Ä 5 “Commissioning”
nHorn air pressure Ä 5 “Commissioning”
The spray gun uses a self-adjusting needle
package. The needle gland automatically
adjusts for the material-related wear of the
needle gland. In addition, the needle packing
can be readjusted mechanically.
2 Safety
2.1 Presentation of Notes
The following notes can appear in this
instruction:
DANGER!
High risk situation that can lead to serious
injuries or death.
WARNING!
Medium risk situation that can lead to
serious injuries or death.
CAUTION!
Low risk situations that can lead to minor
injuries.
Product overview
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NOTICE!
Situations that can lead to material
damage.
ENVIRONMENT!
Situations that can lead to environmental
damage.
Additional information and recom-
mendations.
2.2 Intended Use
The EcoGun 246 spray gun is used exclu-
sively for manual coating of surfaces. Com-
pressed air is used to apply material.
The material is fed through a low pressure
line.
The EcoGun 246 spray gun is only intended
for use in industry and craftmanship.
The use is only permitted within the specified
technical data Ä 11 “Technical data”.
The spray gun is approved for use in explo-
sive areas of Ex zones 1 and 2.
Misuse
Not using as intended entails danger to life.
Examples of wrong use are:
nAiming the spray gun at humans or ani-
mals.
nUse of unapproved materials
nInstallation of unapproved components
and components that are not approved
for operation by Dürr Systems.
nAtomize liquid nitrogen.
nConduct work on the application device
without the recommended personal pro-
tective equipment.
nUse in areas with Ex zone 0
nMaking conversions or changes on your
own.
Ex labeling
II 2G T60°C X
II - Device group II: all areas except
mining
2G - Device category 2 for gas
T60 °C - Surface temperature, max. 60°C
X - Specific operating conditions for
safe operation
The following conditions must be observed
for safe operation:
nGround spray gun and work piece.
nOnly use conductive air hoses.
nEnsure that static electricity can be dis-
charged.
nUse exclusively compressed air quick
couplings for water-based materials,
where it is not necessary to discharge
static electrical charges.
Safety
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2.3 Residual risks
Explosion
Sparks, open flames and hot surfaces can
cause explosions in explosive atmospheres.
Serious injury and death could be the conse-
quence.
nBefore carrying out any work, make sure
that there is no explosive atmosphere.
nDo not use sources of ignition and open
light.
nDo not smoke.
nGround the spray gun.
nGround the work piece.
nOnly use conductive lines.
Flammable coating materials and their deter-
gents and cleaning agents can cause a fire
or an explosion.
nEnsure that the flashpoint of the cleaning
agent is at least 15K above the ambient
temperature or clean Product at the
cleaning areas with active technical ven-
tilation, in painting booths, according to
EN 16985.
nNote explosion group of the fluid.
nFollow the safety data sheet.
nEnsure that forced ventilation and fire
protection equipment are in operation.
nDo not use sources of ignition and open
light.
nDo not smoke.
nGround the spray gun.
Danger from harmful or irritant sub-
stances
Serious injuries or death can result if you
come into contact with dangerous fluids or
steam.
nProduct Check regularly for leakage.
Observe local regulations and mainte-
nance schedule.
nEnsure that the forced ventilation is
operational.
nFollow the relevant safety data sheets.
nWear specified protective equipment.
Escaping material
Material escaping under pressure can cause
serious injuries.
Before working on the product:
nDisconnect the system, in which the
product is installed, from compressed air
and material supply.
nSecure system personalized from being
switched on again.
nDepressurize the lines.
Noise
The sound pressure level during operation
may cause severe hearing damage.
nWear ear protection.
nDo not spend more time then necessary
in the work area.
Hot surfaces
During operation, the surfaces of compo-
nents can get extremely hot. Contact with it
can cause burns.
nDo not touch hot surfaces.
nBefore carrying out any work:
– Let components cool down.
– Wear protective hand gloves.
Safety
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2.4 Staff qualification
WARNING!
Inadequate qualification
Wrong estimation of dangers can cause
serious injury or death.
nOnly sufficiently qualified persons may
execute all work.
nSome work requires additional qualifi-
cation. Additional qualifications of spe-
cialized personnel are marked with a
“+”.
This document is intended for qualified per-
sonnel in industry and craftmanship.
The following describes the different qualifi-
cations required for the work in this docu-
ment. The required qualification is presented
prior to the individual tasks in the appropriate
chapters.
Operator
The operator is trained specifically for the
field of work in which he works.
Furthermore, the operator possesses the fol-
lowing knowledge:
nTechnical Measures for occupational
safety and health
The operator is responsible for the following
work:
nOperate and monitor the system/ product.
nIntroduce measures in the event of faults.
nClean system/ product.
+ additional qualification explosion pro-
tection
In addition to the knowledge of the various
specialist fields, the mechanic has knowl-
edge of regulations and safety measures
when working in potentially explosive areas.
Dürr Systems offers special product training
for Ä “Hotline and Contact”.
2.5 Personal protective equipment
When working in explosive areas, the protec-
tive clothing, including gloves, must meet the
requirements of EN 1149-5. Footwear must
meet the requirements of ISO 20344 and
IEC 61340-4-3. The volume resistivity must
not exceed 100MΩ.
Wear the specified personal protective
equipment when working. Provide the fol-
lowing personal protective equipment:
Eye protection
Protects eyes from dust, paint drops
and particles.
Protective gloves
Protect the hands from:
nmechanical forces
nThermal forces
nChemical effects
Protective workwear
Tight fitting workwear with low
tear strength, tight sleeves and no
hanging parts.
Respiratory protection device
The respiratory protection device
protects from hazardous gases,
vapors, dust and similar materials
and media. The version of the res-
piratory protection device must be
suitable for the media used as well
as their usage.
Safety boots
Protect feet from crushing, falling
items and slipping.
Use ear protection
Protects from auditory damage due
to noise.
Safety
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3 Transport, scope of supply
and storage
3.1 Scope of delivery
The scope of supply includes the following
components:
nSpray gun
nTool kit Ä 12.2 “Tools”
Inspect delivery on receipt for completeness
and integrity.
Report defects immediately Ä “Hotline and
Contact”.
3.2 Handling of packaging material
ENVIRONMENT!
Incorrect disposal
Incorrectly disposed packaging material
can damage environment.
nDispose of material no longer required
in an environment-friendly manner.
nObserve local disposal specifications.
3.3 Storage
Storage provisions:
nDo not store outdoors.
nProduct only store when in a clean and
dry condition.
nStore in a dust-free place.
nDo not expose to aggressive media.
nProtect from solar radiation.
nAvoid mechanical vibrations.
nTemperature: 10°C to 40°C
nRelative humidity: 35% to 90%
4 Assembly
4.1 Requirements for the
Installation point
nThe compressed air supply to the spray
gun must be interrupted and secured
against reconnection.
nThe compressed air supply must be
adjustable.
nLines, seals and screw connections must
be designed to conform to the require-
ments of the spray gun Ä 11 “Technical
data”.
nThe workplace must have a mechanical
ventilation.
Working environment and grounding
The flooring of the working area must be
anti-static acc. to EN 50050-1, measurement
after EN 1081. The antistatic flooring pre-
vents electrostatic charges from building up.
Dangerous flashovers are prevented.
Transport, scope of supply and storage
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4.2 Assembly
Protective equipment:
nProtective workwear
nProtective gloves
1. WARNING!
Sources of ignition may cause explo-
sions!
Ensure a non-explosive atmosphere.
Fig. 2: Assembly
2. Connect lines. Ensure correct assign-
ment.
1- Material
2 - Atomizer air
5 Commissioning
Protective equipment:
nProtective gloves
nSafety boots
nProtective workwear
nEye protection
nRespiratory protection device
nUse ear protection
Requirements:
nMaterial hose and air hose were assem-
bled Ä 4.2 “Assembly”.
1. Rinse the spray gun before filling it with
paint Ä 6.7 “Purging”:
nWith solvents for flammable coating
materials
nWith water for non-flammable coating
materials
2. Create a trial spray pattern on a test work
piece.
Commissioning
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Setting the material flow
Fig. 3: Set total air pressure and material
quantity
1. Set the material quantity.
nTurn material amount control (1) in
desired direction.
– Right turn: less material
– Left turn: more material
Turn material amount control to
the right but not up to the
mechanical stop. The needle can
then no longer move properly.
For reduction of the material
quantity, it is preferable to use
a smaller nozzle set and not
the material quantity control. To
increase the material quantity,
preferably use a larger nozzle
set.
Set total air pressure
Fig. 4: Set total air and horn air pressure
2. Set the total air pressure by turning the
total air control (2).
nCenter position: Maximum total air
pressure
nLeft rotation and right rotation:
reduced total air pressure
Observe the following character-
istic curve.
Set horn air pressure
3. Set horn air pressure by turning the flat
jet control (1).
nRight turn: rounder jet pattern
nLeft turn: flatter jet pattern
You can turn the flat jet control
continuously and adjust the jet
pattern from flat jet to round jet.
Characteristic curves
The characteristic curves show the air flow
rate for various nozzle sets and air caps for
different air pressures.
Commissioning
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Fig. 5: Characteristic curve
PC Nozzle set with air cap PC
PS Nozzle set with air cap PS
AL Nozzle set with air cap AL
X-Achse Atomizer air pressure and control
air pressure [bar (psi)]
Y-Achse Flow rate [Nl/min (CFM)]
6 Operation
6.1 Safety recommendations
WARNING!
Danger of explosion due to chemical
reactions
Material, halogenated hydrocarbon-based
rinsing agent or cleaning agent can chem-
ically react with aluminum components of
the product. Chemical reactions can cause
explosions. Serious injury and death could
be the consequence.
nOnly use purging agents and cleaning
agents that do not contain any halo-
genated hydrocarbons.
NOTICE!
Material damage due to dried material
residues
If material residues dry in the product, that
can harm components.
nPurge product immediately after each
use.
6.2 General notes
1. Perform the following checks during oper-
ation:
nCheck O-rings for correct seating and
tightness.
nCheck air car for cleanliness.
nCheck nozzle for cleanliness.
6.3 Selecting air cap
You can convert the spray gun for various
uses by swapping the air cap.
Air cap AL
The air cap AL is mainly used for an unpres-
surized material feed or in connection with a
suction cup. The air cap AL is used for flam-
mable coating materials (1-component paints
and 2-component paints) and non-flammable
coating materials. It is used for application of
fillers, base coats and topcoats.
Air cap PC
The air cap PC is used for flammable coating
materials (1-component paints and 2-com-
ponent paints) and non-flammable coating
materials. It is used for application of fillers,
base coats and topcoats.
Air cap PS
The air cap PS is used for abrasive coating
materials such as enamel and glaze.
Operation
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Air cap EL
The air cap PC is used for flammable coating
materials (1-component paints and 2-com-
ponent paints) and non-flammable coating
materials when higher outflow rates are
required.
Air cap GL
The air cap GL is used for thick flowing, high
viscosity coating materials with high outflow
rates.
6.4 Changing the air cap
Protective equipment:
nProtective workwear
nProtective gloves
Removing the air cap
Fig. 6: Removing the air cap
1. Loosen cap nut (1).
2. Remove the air cap (1).
Assembling air cap
3. Place the air cap (1).
4. Align the air cap as required Ä 6.5
“Alignment of the air cap”.
5. Tighten cap nut (1).
6.5 Alignment of the air cap
Protective equipment:
nProtective workwear
nProtective gloves
The position of the air cap determines the
alignment of the spray pattern.
Fig. 7: Air cap alignment
1. Lightly loosen cap nut (2).
2. Turn the air cap (1) as required for the
desired spray pattern.
3. Tighten cap nut (2) by hand.
Operation
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6.6 Guiding the spray gun
Protective equipment:
nProtective gloves
nSafety boots
nProtective workwear
nEye protection
nRespiratory protection device
nUse ear protection
Fig. 8: Guiding the paint gun
1. Guide the spray gun as follows:
nGuide spray gun at 90 degrees to the
surface.
nMaintain a distance of 15 to max.
25 cm to the surface.
The distance can vary for effect
coatings.
6.7 Purging
6.7.1 Safety recommendations
NOTICE!
Material damage due to unsuitable
rinsing agent
If the rinsing agent reacts chemically with
the components or the material, compo-
nents get damaged.
nUse only the rinsing agents that are
compatible with the components and
the material.
nRefer to safety data sheet of material
manufacturer.
6.7.2 General notes
When purging, use fluid to remove inner
soiling from components.
6.7.3 Purging spray gun
Protective equipment:
nUse ear protection
nEye protection
nRespiratory protection device
nProtective workwear
nProtective gloves
Purging spray gun:
nAfter end of work
nBefore every change of material
nPrior to cleaning
nPrior to dismantling
nBefore a long time of non-use
nBefore placing in storage
Operation
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Additional purging intervals depend
on the material used.
Preparation for purging
1. Disconnect the air hose from the spray
gun.
Fig. 9: Removing the air cap
2. Loosen cap nut (1).
3. Remove the air cap (1).
Purging
4. Keep collecting tray ready.
Fig. 10: Purging spray gun
5. Keep the spray gun slightly at an angle
above the collecting tray, nozzle (2)
pointing towards the ground.
6. Purge the spray gun with an appropriate
rinsing agent through the material con-
nection (3), until the rinsing agent runs
clean without any material residue. Use a
brush to carefully clean the holes (2) of
the nozzle.
7. Ensure proper disposal of the exiting
material and rinsing agent.
8. Connect the compressed air hose to the
spray gun.
9. Operate trigger lever until no more rinsing
agent flows out.
Final work
10. Place the air cap (1).
11. Tighten cap nut (1).
Operation
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7 Cleaning
7.1 Safety recommendations
WARNING!
Danger of fire and explosion
Flammable coating materials and their
detergents and cleaning agents can cause
a fire or an explosion.
nEnsure that the flashpoint of the
cleaning agent is at least 15K above
the ambient temperature or clean
product at the cleaning areas with
active technical ventilation, in painting
booths, according to EN 16985.
nNote explosion group of the fluid.
nObserve the security data sheets of the
media being used.
nEnsure that forced ventilation and fire
protection equipment are in operation.
nDo not use sources of ignition and
open light.
nDo not smoke.
nCheck grounding.
WARNING!
Unsuitable spare parts in explosive
areas
Spare parts not compliant with the specifi-
cations of the ATEX directives can cause
explosions in an explosive atmosphere.
Serious injury and death could be the con-
sequence.
nUse exclusively original spare parts.
WARNING!
Danger from harmful or irritant sub-
stances
Serious injuries or death can result if you
come into contact with dangerous fluids or
steam.
nProduct Check regularly for leakage.
Observe local regulations and mainte-
nance schedule.
nEnsure that the forced ventilation is
operational.
nFollow the relevant safety data sheets.
nWear specified protective equipment.
nAvoid contact (e.g. with eyes, skin).
WARNING!
Escaping material and compressed air
Escaping material under pressure can
cause serious injuries.
Before carrying out any work:
nDisconnect the system, in which the
product is installed, from compressed
air and material supply.
nSecure system personalized from
being switched on again.
nDepressurize the lines.
Cleaning
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WARNING!
Danger of explosion due to chemical
reactions
Material, halogenated hydrocarbon-based
rinsing agent or cleaning agent can chem-
ically react with aluminum components of
the product. Chemical reactions can cause
explosions. Serious injury and death could
be the consequence.
nOnly use purging agents and cleaning
agents that do not contain any halo-
genated hydrocarbons.
CAUTION!
Risk of injury due to spring tension
The set screw of the spray gun is under
spring tension. If you remove the set
screw, the spring tension could cause the
set screw to jump out unexpectedly and
cause light injuries.
nRemove and install set screw.
NOTICE!
Unsuitable cleaning agents
Unsuitable cleaning agents can damage
the product.
nOnly use cleaning agents approved by
the material manufacturer.
nFollow safety data sheets.
nPlace heavily soiled components in a
cleaning bath.
–Only place those parts in the
cleaning bath, which are suitable for
the cleaning bath.
– Use only electrically conductive
containers.
– Ground the container.
– Do not use ultrasound baths.
nUse alcohols (isopropanol, butanol) for
non-flammable coating materials.
nRemove dried non-flammable coating
materials using a material manufacturer-
approved organic thinner.
nWhen cleaning with flammable detergent,
do not spray into a closed container. An
explosive gas-air mixture can form inside
closed containers.
NOTICE!
Damage due to unsuitable cleaning
tools
Unsuitable cleaning tools can damage the
product.
nOnly use cloths, soft brushes and
paintbrushes.
nDo not use abrasive cleaning tools.
nDo not poke blocked nozzles with met-
allic objects.
nDo not use compressed air for
cleaning.
nDo not use any thinner spray guns.
nDo not use high pressure for cleaning
agents.
7.2 Cleaning
Protective equipment:
nUse ear protection
nEye protection
nRespiratory protection device
nProtective workwear
nProtective gloves
1. Purge spray gun Ä 6.7 “Purging”.
2. Separate material hose and air hose from
the spray gun.
Cleaning
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3. Remove material residues with a cloth or
a soft brush.
4. Clean the spray gun carefully and dry it
with a soft cloth.
Cleaning the air cap und nozzle
Protective equipment:
nProtective workwear
nProtective gloves
For a thorough cleaning you can remove the
air cap and the nozzle.
Disassembly
Fig. 11: Disassemble air cap and nozzle
1. Loosen cap nut (1).
2. Remove air cap (1).
3. Push trigger lever (3) through. Keep it
pressed.
ðThe needle is pushed backwards so
that it will not be damaged during dis-
assembly of the nozzle (2).
4. Unscrew and remove nozzle (2) using
monkey wrench.
5. Release the trigger lever (3).
6. Clean air cap (1) using cleaning agent
and cleaning brush Ä 12.2 “Tools”.
7. Wipe the cleaned air cap dry with a cloth.
8. Clean nozzle (2) in the cleaning bath.
9. Clean nozzle seat with a cloth or a soft
brush.
Assembly
10. Push trigger lever (3) through. Keep it
pressed.
ðhe needle is pushed backwards so
that it will not be damaged during
assembly of the nozzle.
11. Insert and tighten nozzle (2).
Tightening torque: 15Nm
12. Release the trigger lever (3).
13. Fit air cap (1).
14. Tighten cap nut (1).
8 Maintenance
8.1 Maintenance schedule
If a maintenance assistant is used in the system visualizer, the maintenance intervals of
the maintenance assistant are valid.
Maintenance
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The maintenance intervals given below are based on experiential values. Adjust maintenance
intervals individually with increased requirements.
Interval Maintenance work
After each use Clean Ä 7 “Cleaning”.
Daily Check state and tightness of the spray gun as well as of the connections
and lines.
Weekly Lubricate lever bearing Ä 8.2 “Lubrication”.
8.2 Lubrication
The following components must be lubri-
cated with a silicone-free grease:
nO-rings and seals
nBearing
nSet screw and threads
nNeedle gland
nLever bearing
Lubricate internal components at the
time of maintenance work, which
include disassembly of the con-
cerned components any way.
Recommended lubricant: SYN-
THESO GLEP 1 Ä 11.9 “Operating
and auxiliary materials”
9 Faults
9.1 Safety recommendations
NOTICE!
Property damage due to improper
replacement of needle and nozzle
Replacing only the needle or only the
nozzle could damage spray gun compo-
nents. This can compromise the tightness
of the spray gun. The spray pattern deteri-
orates.
nObserve order of replacement steps
(needle – nozzle).
nObserve order of assembly steps
(nozzle – needle).
nAlways replace nozzle and needle at
the same time.
Faults
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NOTICE!
Property damage due to improper han-
dling
Mechanical load can damage needle and
nozzle.
nHandle with care during installation and
dismantling.
nDo not subject the needle to any
mechanical pressure.
nAvoid collisions of components to be
assembled and disassembled with the
needle.
nDo not excessively tighten compo-
nents.
Faults
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9.2 Defects table
Visualizer of typical spray pattern problems
Spray pattern Fault identification
Spray jet is distorted.
Spray jet is bent or tapered.
Spray jet is too thick in the middle.
Spray jet is split.
Spray jet is uneven.
Fault description Cause Remedy
No material Line pinched or broken Check the line.
Material escapes at the
needle gland.
Needle gland worn out Replace needle gland Ä 9.3.3
“Replace needle gland”.
Needle gland loose Tighten needle gland sensitively.
Air escapes between valve
pin and housing.
Valve seal worn out Replace valve seal Ä 9.3.2 “Replace
valve set”.
Spray gun is losing air with
non-actuated trigger.
Valve pin or valve seat
is defective or worn.
Replace the valve pin or valve seat
Ä 9.3.2 “Replace valve set”.
Faults
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