Durr EcoGun 249 Operation 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

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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.

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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 re­tightening.

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 sur­face 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, kera­mic 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 ma­terials:

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

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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/m

3

– 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