Durr EcoGun 249 User manual

II 2 GX
OPERATION MANUAL
EcoGun 249
air spray gun
These spray guns have been engineered for professional
use. read and undersTand This operaTion manual before
operaTing, doing any service or mainTenance procedure.
incorrecT use may resulT in serious personal injury or
damage To The spray gun.
Gun 249

3
EcoGun 249
CONTENTS
SAFETY REGULATIONS 4
Vibrations and noise 4
Work with gun 4
Personal protection during work 5
EQUIPMENT USE AND DESCRIPTION 5
EcoGun 249 spraying gun 6
Air path - used material 6
Coating material path - used material 6
Advantages of new gun 6
TECHNICAL PARAMETERS 7
COMMISSIONING 8
Options for coating material supply 8
Direct connection of air quick-couplings to the gun 8
ADJUSTING OF GUN 8
Advance timing adjustment 9
OPERATION 9
Control of coating mataerial amount 9
Control of spray shape 9
Control of air supply to gun 10
Replacement of nozzle assembly 10
Replacement of needle gland 10
Replacement of air valve sealing 10
MAINTENANCE AND CLEANING 12
Cleaning and maintenance principles 12
Important principles for high-quality function 13
Other optional accessory 13
OPERATION SAFETY 14
PRODUCT TESTING 14
PRODUCT PACKING 14
DISPOSAL 14
WARRANTY TERMS 14
The warranty is not provided 15
COMBINATIONS OF NOZZLE ASSEMBLIES 15

4
EcoGun 249
SPECIFICATION OF COMPONENTS 16
Figures of components 17
Accessory delivered with device 18
Needle sealing set - ident. number 906 668 19
Air valve set - ident. number 906 552 19
TROUBLESHOOTING 20

5
EcoGun 249
SAFETY REGULATIONS
Appropriate standards apply to spraying and handling with
ammable liquids. Areas and rooms, where coating materials
are handled with, shall be identied and adapted regarding the
ammability of the coating materials in compliance with applicable
standards and regulations.
In case the spraying guns are used and operated in other countries,
then relevant national standards and regulations apply.
Electrostatic charge (electricity) can occur under certain
circumstances due to ow of air and liquids. During discharge it may
result in sparking and/or aming.
To prevent such situation it is necessary to use hoses with
guaranteed electrostatic drop-in particularly for coating materials
with ignition point below 21°C (nitro-, acetone coating materials
etc.) and some coating materials of 2nd ammability class preheated
to higher temperature - it is necessary to ensure certied hoses with
such identication.
Vibrations and noise
The vibration level transferred to hands does not exceed maximum
allowed value acc. to NV 272/2011 Coll.
The noise level depends on size of nozzle system and on input
pressure value, which ranges from 80 to 90dB(A). Allowed permitted
nose level acc. to act no. 272/2011 Coll. is 85dB(A) and thus it is
necessary to use hearing protection equipments.
Work With gun
The spraying gun operates with air pressure up to 6 bar, air
pressure - recommended 2.5-3,5 bar. Do not focus the gun to
yourself, other persons or animals. Solvents and thinners may cause
chemical burn. During nozzle assembly, disassembly, cleaning or
each interruption of work proceed very carefully and ensure locking
of the gun to prevent eventual starting. Thus you may prevent the
injury. Before any repair the gun shall be disconnected from the
pressure air and applied material.
CAUTION
Do not use the basic variants of the guns for solvents from chlorohydrocarbon
family, as e.g. 1.1.1. trichlorethan and metylchloride may cause chemical
reaction with aluminium and with galvanized, resp. zinc-coated parts and thus
create explosive mixture with eventual explosion effect.
CAUTION
All persons authorised to operation ad maintenance of the equipment must be
provably acquainted with the safety regulations and with the operation and
maintenance manual for the equipment.

6
EcoGun 249
Personal Protection during Work
During spraying and handling with the application materials
and during cleaning of the equipment follow instructions and
recommendation of manufacturers of particular materials. Use
suitable work protection aids to protect skin, respiratory tract and
eyes (clothes, gloves, respirators protecting masks, resp. breathing
apparatuses, goggles, protection creams etc.).
EQUIPMENT USE AND DESCRIPTION
EcoGun 249 air spraying gun is a gun with lower pressure
supply of the material. The gun features complete stain-less path for
applied material.
Atomising system with decreased pressure of atomising air at the
gun jet mouth, similar to RP system.
The gun features very good grip and balance in hand, as well
as easy less wearisome handling. Assembly threads of connecting
elements are glued with suitable sealing compound (LOCTITE 542).
The spraying gun can handle all types of coating materials,
which are intended to application by spraying, and whose chemical
composition does not disturb the spraying gun components.
Recommended distance of nozzle mouth to the sprayed surface
(spraying distance) depends on side of nozzle assembly and type of
coating material, it ranges from 150 to 190 mm.
Semi-automatic needle seal ensures maximum period
of maintenance-free and reliable operation of the seal.
Mechanical re-tightening of the needle seal enables increased
interval between service repairs. The system joints advantages
of automatic and mechanical design of the needle seal re-
tightening.
Options EcoGun 249
Option EcoGun 249, with air cap LP, is equipped with nozzle setups
No. 08LP, 10LP or 12LP. Is designed especialy for high-quality sur-
face nish in the automotive industry.
Option EcoGun 249, with air cap LC, is equipped with nozzle setups
No. 14LX, 16LX, 18LX, 20LX or 22LX. Is designed for the application
of a wide range of applies materials by air spraying in the industry ,
car varnishing workshops, plastic industry, wood processing, kera-
mic industry , particularly for the application of base paints where an
increased output of the sprayer is necessary.

7
EcoGun 249
ecogun 249 sPraying gun
This type of the gun can handle following types of the coating ma-
terials:
Solvent-based – synthetic, nitro, acetone, polyurethane, epoxy
and acrylic, primers, llers and nish varnishes
Water-based – acrylic, silicate, silicone and polyurethane
substances
and other application materials of similar properties.
Work environment IE 72 acc. to ČSN – EN 60721-3-7.
air Path - used material
Gun body Al alloy with Ni surface layer
Sealing elements POM, PE, PTFE
Parts Stainless steel, brass
coating material Path - used material
Gun body Lined stainless steel AISI 304
Sealing elements PTFE
Parts Stainless steel AISI 304
adVantages of neW gun
»Progressive design and ergonomic shape of the gun body guarantee
very good grip
»Extremely light gun of weight only 521 g, and in standard variant
only 544 g.
»High transfer efciency exceeding legislative requirements related
to the environment
»New atomising system with decreased atomising output pressure
at the jet mouth, high atomisation neness and beam distribution
quality
»New series of modernized nozzle assemblies
»New ergonomic control elements of completely totally new design
»Normally supplied nozzle assemblies featuring perfect tightness
»Special gun body surface treatment guarantees perfect cleanability
»Gun body sealing system made from very resistant materials
guarantees resistance against cleaning in washing machines
»New PTFE sealing elements
»Semi-automatic gland increasing operation life
»High resistance against solvents
»High inspection level of each product

8
EcoGun 249
TECHNICAL PARAMETERS
Maximum allowed input air overpressure ....................6 bar
Operating air pressure - recommended*............ 2,5-3,5 bar
Maximum pressure of applied material .......................6 bar
Air consumption .....................................130-410 Nl.min-1
Power range of sprayed coating material*................ g.min-1
Spraying distance* ........................................150-190 mm
Air quality:
– Max. dew point.....................................................+3°C
– Max. oil content............................................... 1 mg/m3
– Max. size of solid particles......................................5 μm
– Max. temperature ...............................................+40°C
Gun weight(standard) ..............................................521 g
Connecting sizes
– Air supply ..........................................................G 1/4“
– Supply of coating material ................................... G 3/8“
Environment classication
* It depends on size of nozzle assembly and type of coating
material
II 2 GX

9
EcoGun 249
COMMISSIONING
Before commissioning the gun must be cleaned from preservative
substances by suitable degreasing agent – ush the gun with solvent
suitable for the coating material to be applied.
The gun is factory adjusted and prime-sprayed (quality
test).
Pressure air is to be supplied through following hose:
»up to 10 meters -nominal inner diameter 8 mm
»over 10 meters - nominal inner diameter 9,5 mm
oPtions for coating material suPPly
EcoGun 249 model spraying gun features following supply options:
»Lower supply -Fluid connector AM 38 (tting G 3/8“)
direct connection of air quick-couPlings to the gun
The gun design enables connection of air quick-couplings to the
gun. The air input tting may house the quick-coupling mandrel, e.g.
type SFIW 13 from RECTUS.
The manufacturer recommends to use brand quick-couplings with
low pressure loss and long operating life.
The quick-couplings may be used to the air inlet only
during application of water-based coating materials, which
do not require electro-static drop-in.
ADJUSTING OF GUN
The gun does not require any adjustment, when basic maintenance
requirements are followed. Each gun is factory adjusted and prime-
spayed. Upon disassembly and reassembly due to replacement of
the nozzle assembly or worn components it is necessary to inspect
adjustment of following elements.
Gun 249

10
EcoGun 249
adVance timing adjustment
»Start of air before opening of coating material outlet
Reproduction of Dürr Systems Czech Republic component quality
ensuresthattheadvancetimingispermanentlysetduringcommon
replacement of the nozzle set and d not require any adjustment.
»Needle gland is tightened semi-automatically with possible
manual tightening.
OPERATION
Important prerequisite of the high-quality proper function is proper
maintenance. The gun is designed in such manner that the require-
ments may be easily adhered to.
The nozzle assemblies are made from stainless steel AISI 304 and
they are delivered as spare parts as complete nozzle with needle.
To achieve high-quality spraying it is necessary to take care of cle-
anness of the nozzle assembly, prevention of nozzle neck damage,
cleanness and integrity of very precise holes in the air jet. Upon
replacing or cleaning of the nozzle it shall be properly tightened to
make it tight. Recommended torque on the nozzle is 10 Nm.
The gun is factory adjusted and prime-sprayed (quality test).
control of coating mataerial amount
This regulation restricts the lift of the
needle which throttles the ow of material
in the nozzle. By loosening the locking
nut (38) and subsequently turning the
stop screw (20), the lift of the needle and
the volume the material is changed. After
reaching the lift of the locking nut (38),
tighten it again. We recommend using this
method only temporarily. A more suitable
manner is to select a smaller nozzle set
or reducing the pressure of the sprayed
air (if it will not reduce the quality of the
spraying). Fully tightening of the stop bolt will prevent the lift of the
needle and any undesired spraying during handling.
control of sPray shaPe
Air runs out of the wing holes in the air
jet and the air widens the beam shape.
Its amount is controlled by turning of the
control wheel. Left-side turning increases
supplied air amount and enlarges the
beam.

11
EcoGun 249
control of air suPPly to gun
This control (7) is located on the gun
butt and enables throttling the air supply
amount to gun and thus the operator can
decrease the air amount for spraying, resp.
completely stop the supply, without any
handling on the air control in distribution
lines.
rePlacement of nozzle assembly
After dismantling the stop bolt (20) and the securing nut (38),
remove the spring of the needle (18) with the bearing of the needle
(19) and the needle (2). For easier handling, press the lever which
will suppress the needle from the rear part of the gun. Remove the
nozzle from the front part of the gun by unscrewing (1). Dismantle the
nozzle from the gun by the attached wrench (41). Before assembly
of a new nozzle set, it is recommended to clean the assembly areas.
Attach the new nozzle and fully tighten. The recommended tightening
moment on the nozzle is 10 Nm. Behind the gun, insert the needle
with spring and bearing, and replace the locking nut, bolt stop and
nozzle.
rePlacement of needle gland
Upon any leakage it is necessary to
re-tighten the gland (9) by the gland
screw (12) by clockwise rotation of
the screw to condition, where the
gland is again tight. In case the gland
screw cannot rotate and the gland
still leaks, the gland shall be replaced
for a new one. Unscrew the gland
screw (12) and remove the old gland
assembly. Before installation o new
gland clean the gland area. Insert new gland (9), spring guide (10)
and gland spring (11) from the needle sealing set. Tighten the gland
screw to ensure proper tightness of the gland.
rePlacement of air ValVe sealing
»Disassembly: (pic. a) Disassemble the end stop screw (20)
and locking nut (38) with spring (18), bearing (19) and needle
(2). Use wrench (41) to disassemble the control bushing (17)
with spring (16) from the gun. Press lever to insert the pin (15)
to the gun, and then remove it. Insert to the gun assembly
key (42), insert the mandrel assembly (38) from the air valve
set, insert needle to the mandrel and press lever to press out
the seal roller (13) from the gun. Seal will remain on the key
assembly (42), which then pull out from the gun. (pic. b)
910 11 12

12
EcoGun 249
»Use the assembly mandrel to press out the sealing from
removed control bushing. Insert the mandrel (39) to the
control bushing and screw-in the end stop screw (20)
to press the sealing U1 (13) out of the control bushing.
pic. a) pic. b)
»Assembly: Insert the new sealing (37) from the air valve set to
the assembly wrench (42) and tap it to the gun body. Similarly
insert the sealing U1 (13) into disassembled control bushing.
»Insert new pin (15) from the set to body, screw-in the spring
with control bushing to the body, insert needle and screw-in the
end stop screw with spring and spring bearing.
We recommend to leave repairs to the authorised service cent-
re, see service manual.
13 39 20
2
423739
42
1337

13
EcoGun 249
MAINTENANCE AND CLEANING
cleaning and maintenance PrinciPles
»Prevent drying of the coating material in the gun or on the surface.
its removal (when dried) is difcult and may result in damage of
smooth surface.
»Clean the holes in the nozzle assembly very carefully, as this is the
most important part affecting the spraying quality.
»During cleaning of the gun front part keep the gun with nozzle
directing downward. thus the entry of solvent with residues of
the coating material to gun air channels is prevented, as well
as subsequent damage to the gun function. after each cleaning
connect the gun to the pressure air supply and blow out the ai
channels by actuation of lever.
»Pas NEEDED after cleaning grease the level bushing (27),
operational part of the control screw (21) and threads of control
screws with suitable grease (MOLYKOTE Cu 7439)
»The gun is washed in appropriate solvent corresponding to type
of sprayed coating material. Pihe gun can be washed in the gun
washing machine. However never immerse the gun to solvent and
prevent long-term stay of gun in the solvent vapour area.
CAUTION
Do not use any metal items for cleaning!!!
Connect
pressured air
1
Blow through
2

14
EcoGun 249
imPortant PrinciPles for high-quality function
»Proper choice of the assembly nozzle acc. to type of the coating
material and size of the object (if you have any special requirements
please contact the sales-technical depts. of the manufacturer).
»Properly treated air for spraying (free of dirt, water and oil –
perfectly ltered).
»Filtered coating material of correct viscosity and free of dirt (follow
and adhere to the instructions of the manufacturers of particular
coating materials).
»Properly prepared (cleaned and maintained) spraying gun.
»Adhere to the recommended air pressure for atomising.
aariants of nh suPPly
tyPe cat. no. set content
Hose set 8/6 (g. 1) 907 436 Hose is not part of delivery
Hose set 6/4 (g. 2) 907 437 Hose is not part of delivery
pic. 1 pic. 2
other oPtional accessory
»Pressure control with separator
»Air contaminant separator
»Hose quick-couplings
»Hoses
»Compressor
»Personal protection equipments

15
EcoGun 249
OPERATION SAFETY
The product complies with regulations ad standards related to the
products of such nature.
All employees authorised with operation and maintenance
of the equipment shall be provably acquainted with safety
and health regulations for work in paint shops and with the
spraying gun operating and maintenance manual.
The operators shall perform training of the personnel and provide
them with specied personal protecting equipments. Training, resp.
more detailed information can provide the equipment supplier upon
request.
PRODUCT TESTING
»Each piece of equipments is subject to factory functional and
pressure testing.
PRODUCT PACKING
»Depends on individual parts of the delivery.
DISPOSAL
»On expiration of the components, resp. gun operation life it may
be disposed to the sorted waste material upon cleaning.
»The packing materials of the product (cat. no. 200101, see Decree
of the Environment Protection Ministry no. 381/2001 Coll.) shall be
disposed as mixed municipal waste. Used paper packing dispose
to the separate waste material.
WARRANTY TERMS
»see service manual
RELATED STANDARDS
EN ISO 12100, EN ISO 13732-1, EN 894, EN ISO 4414, EN 1037+A1,
EN 1070, EN 1127-1, EN 13463-1, EN 60079-0, EN 60721-3-7/A1,
EN ISO 11204,

16
EcoGun 249
the Warranty is not ProVided
»For mechanical damage of rough handling with the product.
»For damage, wearing or fault caused by improper or non-adequate
maintenance, abrasion, corrosion or use of non-original spare
parts, components and materials.
»For non-allowed or non-professional intervention on the device.
»The warranty does not apply to easily worn components, such as
sealing elements, springs and nozzle with needle, at which the
wearing depends on abrasive properties of the applied materials,
pressure and other circumstances

17
EcoGun 249
COMBINATIONS OF NOZZLE ASSEMBLIES
air jet nozzle assembly
tyPe identification no. tyPe ident. no.
LP 908 435
08LP 908 438
10LP 908 439
12LP 908 440
LC 908 450
14LX 908 454
16LX 908 455
18LX 908 456
20LX 908 457
22LX 908 458
Nozzle set consists of nozzle with distribution plug and needle.

18
EcoGun 249
SPECIFICATION OF COMPONENTS
Position name identification no. quantity
1 Air Cap Specied in table
„Combinations of
Nozzle Sets“
1
2 Nozzle Set 1
3 Body EcoGun 119 Not supplied —
4 O-ring 33.3 x 1.6 105 081 1
5 O-ring 105 173
6 Air Fitting 808 378 1
7 Air Supply Control 908 374 1
8 O-ring 105 031 1
9 Gland 70° 806 674 1
10 Spring Quide 806 675 1
11 Gland Spring 804 290 1
12 Gland Screw 806 466 1
13 Sealing U1 135 016 1
14 Piston Seat 135 017 1
15 Spindle 907 722 1
16 Spindle Spring 124 082 1
17 Bushing L 808 095 1
18 Pressing Spring 124 089 1
19 Bearing L 808 097 1
20 End Stop Screw 808 096 1
21 Control Screw 808 380 1
22 Sealing 806 948 1
23 Control Bushing 808 379 1
24 Control Wheel 806 464 1
25 Ring Set 906 439 1
26 Screw 114 247 1
27 Trigger pin 808 377 1
28 Ring 3,2 117 017 1
29 Trigger 806 510 1
30 Fluid connector AM 38 808 425 1
31 Reinforcement bushing 129 041 1
32 Clamping ring SF 806 882 1
33 Cap nut G 3/8“ 807 433 1
34 Reinforcement bushing 129 014 1
35 Clamping ring SF 129 012 1
36 Cap nut G 3/8“ 807 433 1
37 Sealing of the roller 135 002 1
38 Locking nut 807 709 1

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EcoGun 249
figures of comPonents
21
27
28
7
6
22 23 24
25 26
29
2
18
19 20
37
14
15 16
13 8
17
910 11 12
30
1
2
4
3
5
38
31 32 33
34
35
36

20
EcoGun 249
accessory deliVered With deVice
Position name identification no. quantity
40 Allen key size 7 152 019 1
41 Universal wrench 806 697 1
42 Assembly wrench 806 698 1
43 Cleaning brush 139 100 1
44 Gun hook 904 599 1
45 Sealing 807 708 1
46 Insert 128 670 1
47 Assembly rod 907 520 1
25 Ring set 906 439 1
25 46 42 40 43 41 44
45 47