wiwa 300 User manual

Operation Manual
Original operation manual
1411_DM 333_DBK_en • jw
DUOMIX 300 / 333
Type:
❍ 300
❍ 333
Serial-No.
_______________
3D-BILDER!!!
2K-Proportioning pump 333
(Fig. includes optional accessories)

2Original declaration of conformity
1411_DM 333_DBK_en • jw

Original operating instructions DUOMIX 300 / 333 3
DM333_BAoDB_en_1608 • rs
Contents
Contents
1 Foreword........................................................................................................7
2 Safety .............................................................................................................8
2.1 Explanation of symbols...............................................................................8
2.2 Safety information.....................................................................................10
2.2.1 Operating pressure.............................................................................10
2.2.2 Risks due to the spray jet ...................................................................10
2.2.3 Risks due to electricity........................................................................ 11
2.2.4 Risks due to electrostatic charging..................................................... 11
2.2.5 Risks due to hot or cold surfaces ....................................................... 11
2.2.6 Explosion protection ...........................................................................12
2.2.7 Health risks.........................................................................................13
2.3 Safety signs..............................................................................................13
2.4 Safety equipment......................................................................................14
2.4.1 Safety valves ......................................................................................15
2.4.2 Compressed air shut-off valves..........................................................15
2.4.3 Ground cable......................................................................................16
2.4.4 Stop/emergency stop button ..............................................................16
2.4.5 Rupture discs .....................................................................................17
2.4.6 Overpressure valves (optional) ..........................................................17
2.4.7 Switch for automatic spray gun (optional) ..........................................17
2.5 Operating and maintenance personnel ....................................................18
2.5.1 Obligations of the machine owner ......................................................18
2.5.2 Personnel qualications .....................................................................18
2.5.3 Authorised operator............................................................................18
2.5.4 Personal protective equipment...........................................................18
2.6 Guarantee information..............................................................................19
2.6.1 Spare parts.........................................................................................19
2.6.2 Accessories ........................................................................................19
2.7 Behaviour in an emergency......................................................................20
2.7.1 Bring the machine to a standstill and relieve the pressure.................20
2.7.2 Leaks..................................................................................................20
2.7.3 Injuries................................................................................................20
3 Machine description ...................................................................................21
3.1 Intended use.............................................................................................21
3.2 Erroneous use ..........................................................................................21
3.3 Modular machine conguration ................................................................22
3.4 Conguration examples............................................................................23
3.4.1 DUOMIX 333 on mobile frame ...............................................................23
3.4.2 DUOMIX 333 on stacker frame with heaters and hose heating .............24
3.4.3 DUOMIX 333 on mobile frame with heated material tanks ....................25
3.4.4 DUOMIX 333 on mobile frame with feed tanks ......................................26

4 Original operating instructions DUOMIX 300 / 333
DM333_BAoDB_en_1608 • rs
Contents
3.5 Proportioning pump ..................................................................................27
3.6 Maintenance unit ......................................................................................28
3.7 Control cabinet .........................................................................................29
3.8 Compressed air regulation unit.................................................................31
3.9 Mixing units...............................................................................................31
3.9.1 Manual mixing unit on the frame ........................................................32
3.9.2 External mixing unit with manual operation........................................33
3.9.3 Pneumatic mixing unit on the frame with 2 ushing valves ................34
3.9.4 Pneumatic mixing unit with one ushing valve ...................................35
3.9.5 External pneumatic mixing unit ..........................................................36
3.10 Intermediate pieces ..................................................................................36
3.11 Flushing pump..........................................................................................38
3.12 Material supply .........................................................................................38
4 Optional expansions and accessories......................................................40
4.1 Material warming and heating systems ....................................................40
4.1.1 Material uid heater............................................................................40
4.1.2 Barrel oor heater...............................................................................40
4.1.3 Barrel heating tape and heating sleeves ............................................41
4.1.4 Screw-in heating element...................................................................41
4.2 Hose heating ............................................................................................42
4.2.1 Hose heating with hot water circulation..............................................42
4.2.2 Hose heating with heating coil............................................................43
4.3 Agitators ...................................................................................................43
4.4 Level monitoring .......................................................................................44
4.5 Ratio check unit........................................................................................44
4.5.1 Flow rate measuring device ...............................................................45
4.5.2 Cycle counter .....................................................................................45
4.5.3 Internal pipe coater.............................................................................46
4.5.4 Distributor for spray guns ...................................................................46
5 Transport, installation and assembly........................................................47
5.1 Transport ..................................................................................................47
5.2 Installation site..........................................................................................48
5.3 Installation ................................................................................................49
5.3.1 Installing the hose assembly ..............................................................50
5.3.2 Connect the spray hose and spray gun..............................................51
5.3.3 Ground the machine...........................................................................52
5.3.4 Insert lter inserts in the high pressure lter.......................................52
5.3.5 Connect ushing pump.......................................................................52
5.3.6 Connect feed pumps ..........................................................................52
5.3.7 Connect the owner's optional expansions and attachment devices...53
5.3.8 Establish the mains connection..........................................................53
5.3.9 Connect compressed air supply .........................................................54

Original operating instructions DUOMIX 300 / 333 5
DM333_BAoDB_en_1608 • rs
Contents
6 Operation.....................................................................................................55
6.1 Putting the machine into operation...........................................................55
6.1.1 Overview of the working steps during commissioning........................56
6.1.2 Start the machine ...............................................................................56
6.1.3 Put the ushing pump into operation..................................................56
6.1.4 Clean the machine .............................................................................56
6.1.5 Ready the processing material...........................................................57
6.1.6 Fill machine with processing material and vent..................................57
6.1.7 Set the de-icing system ......................................................................59
6.1.8 Clean and ll hose assembly and spray gun......................................59
6.1.9 Put the heating systems into operation ..............................................60
6.1.10 Put hose heating into operation with hot water ..................................60
6.1.11 Calibration — check the mixing ratio..................................................60
6.2 Spraying ...................................................................................................61
6.2.1 Set spray pressure .............................................................................62
6.2.2 Setting the pressure and metering monitoring ...................................63
6.2.3 Tips for good coatings ........................................................................63
6.3 Flushing....................................................................................................64
6.3.1 End material feed and ready cleaning uid ........................................64
6.3.2 Flush mixing unit and spray gun.........................................................65
6.3.3 Clean the machine thoroughly............................................................66
6.4 Material change........................................................................................67
6.5 Relieve pressure.......................................................................................67
6.6 Decommissioning .....................................................................................68
6.7 Putting out of use......................................................................................69
6.8 Storage.....................................................................................................69
6.9 Disposal....................................................................................................69
7 Maintenance ................................................................................................70
7.1 Regular testing .........................................................................................71
7.2 Maintenance schedule..............................................................................71
7.3 Maintenance unit ......................................................................................72
7.3.1 Check lubricant level in the oil mister .................................................72
7.3.2 Check and adjust the oil mister ..........................................................72
7.3.3 Check and clean the water separator.................................................73
7.4 Proportioning pump ..................................................................................73
7.4.1 Check the release agent level ............................................................74
7.4.2 Check release agent for material residues and top up.......................74
7.5 Feed pumps..............................................................................................74
7.5.1 Check the release agent level ............................................................74
7.6 High pressure lter ...................................................................................75
7.6.1 Clean lter insert ................................................................................75
7.6.2 Filter inserts for high pressure lters ..................................................76

6 Original operating instructions DUOMIX 300 / 333
DM333_BAoDB_en_1608 • rs
Contents
7.7 Silica gel lter ...........................................................................................76
7.7.1 Disassemble silica gel lter ................................................................77
7.7.2 Drying the granulate ...........................................................................77
7.7.3 Fit silica gel lter.................................................................................77
7.8 Clean dirt trap...........................................................................................78
7.9 Replacing the material pumps..................................................................79
7.9.1 Disassemble material pump(s)...........................................................79
7.9.2 Fit material pump(s) ...........................................................................80
7.10 Recommended operating uids................................................................81
7.11 Special tool...............................................................................................82
8 Eliminating operational faults....................................................................83
9 Technical data .............................................................................................87
9.1 Machine card............................................................................................87
9.2 Type plates ...............................................................................................87

Foreword
Original operating instructions DUOMIX 300 / 333 7
DM333_BAoDB_en_1608 • rs
1 Foreword
Valued Customer!
We are delighted that you have opted for one of our machines.
These operating instructions are directed at the operating and maintenance
personnel. They contain all information required in order to handle this ma-
chine.
The machine owner must ensure that the operating and maintenance
personnel always have access to a copy of the operating instructions
in a language that they understand.
In addition to the operating instructions, further information is also essential
for the safety operation of the machine. Read and observe the directives and
accident prevention regulations valid in your country.
In Germany, these are:
➤ZH 1/406 "Guidelines for liquid jet sprayers (spray devices)" from the
Federation of Institutions for Statutory Accident Insurance and Prevention,
➤BGR 500, chap. 2.29 "Processing Coating Materials",
➤BGR 500, chap. 2.36 "Working with liquid jet sprayers", both from the
professional association for gas, district heating and water management.
We recommend enclosing all relevant directives and accident prevention regu-
lations with the operating instructions.
Furthermore, always observe the manufacturer's instructions and processing
guidelines for coating or conveyance materials.
If questions should arise, we shall be happy to assist you.
We wish you excellent working results with your machine
WIWA Wilhelm Wagner GmbH & Co. KG.
Copyright
© 2016 WIWA
The copyright to these operating instructions belongs to
WIWA Wilhelm Wagner GmbH & Co. KG
Gewerbestr. 1-3 • 35633 Lahnau • Germany
Tel.: [phone] • Fax.: [phone] • Email: [email protected] • Website: www.wiwa.de
These operating instructions are intended exclusively for the preparation, operating and maintenance
personnel. It is expressly prohibited to distribute these operating instructions, duplicate, exploit or com-
municate their contents, unless expressly authorised to do so. Infringement will lead to compensation.
All rights to any patent, utility model or design registrations reserved.

Safety
8 Original operating instructions DUOMIX 300 / 333
DM333_BAoDB_en_1608 • rs
2 Safety
This machine has been designed and manufactured with consideration to all
safety aspects. It reects current engineering practice and the valid accident
prevention regulations. The machine left the factory in faultless condition and
guarantees a high level of technical safety. However, erroneous operation and
misuse result in a risk to:
➤the life and limb of the operator or third parties,
➤the machine and other property of the owner,
➤the efcient function of the machine.
It is fundamentally prohibited to implement all methods of work that have
a negative inuence on the safety of the operating personnel and the machine.
All persons involved in the installation, commissioning, operation, care, repair
and maintenance of the machine must have read and understood the operating
instructions beforehand - in particular the "Safety" chapter.
Your safety depends on it!
We recommend that the machine owner have this conrmed in writing.
2.1 Explanation of symbols
Safety information warns of potential accident risks and describes the meas-
ures required for accident prevention. In the operating instructions from WIWA,
safety information is highlighted and labelled as follows:
DANGER
Signals a risk of accidents that are very likely to result in serious injuries and
even death, if the safety information is not observed!
WARNING
Signals a risk of accidents that may result in serious injuries and even death,
if the safety information is not observed!
CAUTION
Signals a risk of accidents that may result in injuries, if the safety information
is not observed!
Signals important information for correct work with the machine. A failure to
observe this may result in damage to the machine or its environment.
A range of pictograms are used in the safety information for accident risks that
may result in injury, depending on the hazard source - examples:
General risk of accident

Safety
Original operating instructions DUOMIX 300 / 333 9
DM333_BAoDB_en_1608 • rs
Risk of explosion due to explosive atmosphere
Risk of explosion due to explosive substances
Risk of accident due to electricity or electrostatic charge
Risk of crushing due to moving machine parts
Risk of burning due to hot surfaces
Risk of freezing due to cold surfaces
The rst line of the safety instructions indicates the personal protective equip-
ment that must be worn. This is also highlighted and labelled as follows:
Wear protective clothing
Signals an instruction to wear the prescribed protective clothing, in order to
prevent skin injuries due to spray material or gases.
Use eye protection
Signals an instruction to wear safety goggles, in order to prevent eye injuries
due to material spray, gases, vapours or dust.
Use hearing protection
Signals an instruction to wear hearing protection, in order to prevent damage
to hearing caused by noise.
Use respiratory protection
Signals an instruction to use respiratory protection, in order to prevent
damage to the respiratory tract caused by gases, vapours or dust.
Wear protective gloves
Signals an instruction to wear protective gloves with forearm protection,
in order to prevent a risk of burns due to heated material.
Wear safety shoes
Signals an instruction to wear safety shoes, in order to prevent foot injuries
due to falling, toppling or rolling objects, as well as slipping on slippery oors.
Signals references to directives, work instructions and operating instructions
that contain very important information and must be observed.

Safety
10 Original operating instructions DUOMIX 300 / 333
DM333_BAoDB_en_1608 • rs
2.2 Safety information
Always remember that the machine operates in a high pressure process and
can cause life-endangering injuries if handled incorrectly!
Always observe and follow all information in these operating instructions
and in the separate operating instructions for the individual machine parts or
the optionally available auxiliary devices.
2.2.1 Operating pressure
WARNING
Parts that are not designed for the maximum permissible operating pressure
may rupture and cause serious injuries.
➤It is essential to observe the prescribed maximum operating pressures
for all parts. With varying operating pressures, the lowest value always
applies as the maximum operating pressure for the complete machine.
➤Material hoses and hose connections must comply with the maximum
operating pressure including the required safety factor.
➤Material hoses must not exhibit leaks, kinks, signs of wear or bulges.
➤Hose connections must be tight.
2.2.2 Risks due to the spray jet
WARNING
The material exits the spray gun under very high pressure. The spray jet can
cause serious injuries through its cutting action, or by penetrating the skin or
eyes.
➤Never aim the spray gun at yourself, other persons or animals!
➤Never hold the nger or hand in front of the spray gun!
➤Never reach into the spray jet!
WARNING
An unintended ejection of material from the spray gun can cause personal
injury and property damage.
➤Lock the spray gun with all interruptions to work!
➤Prior to each start-up, always check the spray gun lock!

Safety
Original operating instructions DUOMIX 300 / 333 11
DM333_BAoDB_en_1608 • rs
2.2.3 Risks due to electricity
Only applies to machines with electrical pressure or metering monitoring and/or
auxiliary electrical equipment:
WARNING
In atmospheres containing solvents, the mains cable can become brittle or
porous.
➤Check the mains cable prior to each start-up for any visible damage.
➤Never patch a mains cable.
➤A damaged mains cable must be replaced immediately by specialist
personnel with an electrical qualication.
2.2.4 Risks due to electrostatic charging
WARNING
The high ow speeds with the airless spray process can result in an electro-
static charge. Static charges can result in re and explosions.
➤Ensure that the machine is correctly earthed outside of EX zones!
➤Also earth the object that is to be coated.
➤Always use open containers!
➤Never spray solvents or materials containing solvents into nar-
row-mouthed cans or barrels with a bung opening!
➤Set the container down on an earthed surface.
➤Use electrically conductive containers.
➤Always ensure contact between the spray gun and the container wall.
➤Only use electrically conductive material hoses.
All original material hoses from WIWA are conductive and designed
for our machines.
WARNING
If the machine becomes contaminated with material during operation,
an electrostatic charge may be generated with the increasing coating thick-
ness. Static charges can result in re and explosions.
➤Clean the machine of contaminants immediately.
➤Perform the cleaning work outside of EX zones.
2.2.5 Risks due to hot or cold surfaces
CAUTION
When using material heaters, the machine surfaces may become hot. A risk
of burns exists.
➤When processing heated materials always wear protective gloves
with forearm protection.

Safety
12 Original operating instructions DUOMIX 300 / 333
DM333_BAoDB_en_1608 • rs
CAUTION
Air motors become very cold during operation. Localised freezing can arise
with contact.
➤Prior to all work on the machine, heat air motors up to a temperature
above 10°C.
➤Wear suitable protective gloves!
2.2.6 Explosion protection
WARNING
Machines that are not explosion-protected must not be used in operating
facilities that fall under the explosion protection ordinance!
Explosion-protected machines can be identied by the corresponding
mark on the type plate and/or the ATEX declaration of conformity provided.
Explosion-protected machines full the requirements of the ATEX Directive
for the device group, device category and temperature class cited on the type
plate or in the declaration of conformity.
The owner is responsible for designating the zoning in accordance with ATEX
Directive, Annex II, No. 2.1-2.3 in accordance with the provisions of the re-
sponsible regulatory body. The owner is required to check and ensure that all
technical data and labelling comply with the applicable stipulations according to
ATEX.
Please note that some parts have their own type plate with separate labelling
according to ATEX. In this case, the lowest explosion protection of all labels
displayed applies to the entire machine. For applications, whereby a failure of
the machine could lead to dangers to personnel, the owner is required to imple-
ment appropriate safety measures.
If agitators, heaters or other electrically operated accessories are attached, the
explosion protection must be checked. Plugs for heaters, agitators, etc. that do
not have explosion protection may only be plugged in outside of areas that fall
under the explosion protection ordinance, also if the accessory itself is explo-
sion protected.
WARNING
Heating solvents can lead to an explosion. The consequences may be seri-
ous physical injuries and property damage.
➤Observe the ashpoint and ignition temperature of solvents.
➤Switch all Material uid heaters off when carrying out the following work:
Cleaning, pressure testing, decommissioning, maintenance and repair.
➤Only perform cleaning work when the machine has cooled down.

Safety
Original operating instructions DUOMIX 300 / 333 13
DM333_BAoDB_en_1608 • rs
2.2.7 Health risks
CAUTION
Depending on the materials being processed, solvent vapours may arise,
which could lead to damage to health and property.
➤Make sure the workplace is sufciently ventilated and aired.
➤Always observe the processing instructions of the material manufacturer.
When handling paint, solvents, oils, greases and other chemical substanc-
es, observe the safety and metering instructions of the manufacturer and
the generally applicable regulations.
Only use suitable skin protection, skin cleansing and skincare products
for cleansing the skin.
In systems that are closed or under pressure, dangerous chemical reactions
may arise, if parts produced from aluminium or galvanised parts come into
contact with 1.1.1 - trichloroethane, methylene chloride or other solvents that
contain halogenated chlorinated hydrocarbons (CFCs). If you wish to process
materials that contain the aforementioned substances, we recommend that you
contact the material manufacturer in order to clarify their suitability for use.
A range of machines in rust and acid-resistant designs is available for these
types of materials.
2.3 Safety signs
The safety signs attached on the machine, such
as for example the safety card (see Fig. 1)
indicate possible hazard points and must be
observed.
The symbolism on the safety signs corresponds
to the labeling of the safety information described
in chap. 2.1 on page 8.
The safety signs may not be removed from the
machine.
Damaged and illegible safety signs must be
replaced immediately.
Also read and observe the safety information in
the operating manual! Fig. 1: Safety card
Für Ihre Sicherheit
For your safety •Pour votre sécurité
Por razones de seguridad •Для вашей безопасности
Güvenliğiniz için • Dla Twojego bezpieczeństwa
För din säkerhet • Para a sua segurança
© 05 / 2015 • 0642169
www.wiwa.de
www.wiwa.com
Spritzpistole nicht auf Personen oder Tiere richten
Do not point spray gun at persons or animals
Ne jamais diriger le pistolet de pulvérisation en direction de personnes ou d‘animaux
No dirigir la pistola pulverizadora hacia personas ni animales
Не направляйте пистолет-распылитель на людей или животных
Püskürtme tabancasını kişilere veya hayvanlara doğrultmayın
Pistoletu natryskowego nie kierować w stronę ludzi lub zwierząt
Rikta inte sprutpistolen mot människor eller djur
Não direccionar a pistola de pintura para pessoas ou animais
Nicht in den Spritzstrahl fassen
Do not reach into the spray jet
Ne pas toucher au jet
No interceptar el chorro de pulverización
Не прикасайтесь к струе распыляемого материала
Püskürtme huzmesine elinizi sokmayın
Nie sięgać w strumień rozpryskowy
Stick inte in händerna i sprutstrålen
Não tocar no jacto de pulverização
0
bar
psi
SOS
Im Notfall: Energiezufuhr absperren und Druck entlasten
In an emergency: Shut off power supply and relieve pressure
En cas d‘urgence : Bloquer l‘alimentation en énergie et relâcher la pression
En caso de emergencia: Cortar el suministro de energía y despresurizar el sistema
В экстренной ситуации: Заблокируйте подачу тока и сбросьте давление
Acil durumda: Enerji beslemesini kesin ve basıncı azaltın
W sytuacji awaryjnej: Zablokować dopływ energii i zredukować ciśnienie
Vid nödfall: Stäng av strömtillförsel och töm ut trycket
Em caso de emergência: Bloquear a alimentação de energia e despressurizar
In EX-Zonen nur Maschinen mit EX-Kennzeichnung betreiben
In EX zones, only operate machinery with EX labelling
Dans les zones soumises à un risque d‘explosion, exploiter uniquement
des machines présentant un marquage EX
En zonas con riesgo de explosión poner en servicio únicamente máquinas
con identicación EX
Во взрывоопасных зонах используйте только машины с маркировкой
взрывозащиты
EX bölgelerinde sadece EX işaretli makineleri işletin
W strefach zagrożonych wybuchem eksploatować wyłącznie maszyny z oznaczeniem EX
Endast EX-märkta maskiner får användas i EX-zoner
Nas zonas EX apenas operar máquinas com a identicação EX
bar
psi
max.
Zubehöre /Ersatzteile: max. Betriebsdruck der Maschine beachten!
Accessories / spare parts: Observe the max. operating pressure of the machine!
Accessoires/pièces de rechange : respecter pression de service max. de la machine !
Accesorios/piezas de repuesto: ¡Observar la presión de servicio máx. de la máquina!
Комплектующие / запчасти: учитывайте макс. рабочее давление машины!
Aksesuar / yedek parçalar: Makinenin maks. işletim basıncını dikkate alın!
Wyposażenie / części zamienne: przestrzegać maks. ciśnienia roboczego maszyny!
Tillbehör/reservdelar: ge akt på maskinens max. arbetstryck!
Acessórios / peças de substituição: ter em atenção a pressão de serviço máx. da máquina!

Safety
14 Original operating instructions DUOMIX 300 / 333
DM333_BAoDB_en_1608 • rs
2.4 Safety equipment
WARNING
If safety equipment is missing or is not fully functional, the operating safety
of the machine is not guaranteed!
➤Put the machine out of operation immediately if you detect safety equip-
ment defects or any other faults on the machine.
➤Only put the machine back into operation once the faults have been fully
rectied.
The machine is equipped with the following safety equipment:
➤Safety valves
➤Compressed air shut-off valves
➤Ground cable
➤Stop or emergency stop buttons (depending on whether your machine is
equipped with pneumatic or electrical pressure and metering monitoring)
➤Rupture discs
➤Overpressure valve - optional
➤On/off switch for spray guns - optional
Check the safety equipment on the machine:
➤Prior to starting up,
➤Always prior to starting work,
➤After all set-up work,
➤After all cleaning, maintenance and repair work.
Checklist on the pressureless machine:
5Seal on the safety valve OK?
5Safety valve externally free of damage?
5Ground cable free of damage?
5Compressed air shut-off valves move freely?
Checklist on the pressurised machine:
5Function of the safety valve OK?
5Function of the compressed air shut-off valves OK?
5Function of the overpressure valve (optional) OK?
5Function of the on/off switch for the spray guns (optional) OK?
When checking further safety equipment observe the operating instructions
for the optional accessories.

Safety
Original operating instructions DUOMIX 300 / 333 15
DM333_BAoDB_en_1608 • rs
2.4.1 Safety valves
Safety valves are tted to the DUOMIX 300/333:
➤In the air outlet of the maintenance unit for
the proportioning pump (see Fig. 2),
➤In the air motors of the ushing pump and
the optionally available feed pumps.
The safety valves prevent the maximum permissi-
ble air intake pressure from being exceeded.
If the air intake pressure for the machine com-
ponents monitored by the safety valve exceeds
the limit value setting, the safety valve installed
here discharges.
In order to check the function of a safety valve,
briey increase the air intake pressure on the
system components monitored by the safety valve
to approx. 10% above the maximum permissible
Fig. 2: Safety valve
value according to the type plate – the safety valve must discharge.
WARNING
If the maximum permissible air intake pressure is exceeded, parts may rup-
ture. The consequences may be personal injuries and property damage.
➤Never operate the system without safety valves or with defective safety
valves!
➤If it is necessary to replace a safety valve, please refer to the machine
card for the order number.
➤With new safety valves, please ensure that these are set to the maxi-
mum permissible air intake pressure of the machine (see type plate or
machine card) and sealed.
Changing the mixing ratio changes the pressure transmission and therefore
also the maximum permissible air intake pressure.
In this case the existing safety valve must be replaced following agreement
with WIWA.
2.4.2 Compressed air shut-off valves
The compressed air shut-off valve
on the maintenance unit interrupts the air
supply to the entire machine (see Fig. 3).
Furthermore, the machine is optionally
equipped with further compressed air shut-off
valves, with which it is possible to interrupt
the air supply to individual components, such
as the ushing pump, the feed pumps, etc.
The functional principle of all compressed air
shut-off valves installed on the machine is
the same:
Fig. 3: Compressed air shut-off valve
OPEN
CLOSED
➤Open  Position ball valve in the ow direction
➤Close  Position ball valve transverse to the ow direction

Safety
16 Original operating instructions DUOMIX 300 / 333
DM333_BAoDB_en_1608 • rs
After shutting off the air, the machine remains under pressure. It is therefore
necessary to fully relieve the pressure prior to any maintenance and repair
work!
2.4.3 Ground cable
The Ground cable serves to prevent
an electrostatic charging of the machine.
The Ground cable is already connected to
the high pressure lter at the time of deliv-
ery.
If the Ground cable is lost or defective,
it must be replaced immediately! Fig. 4: Ground cable
2.4.4 Stop/emergency stop button
Using the red button on the control cabinet for the pressure and metering moni-
toring, it is possible to switch the DUOMIX 300 / 333 off immediately
in an emergency (see Fig. 5 and Fig. 6).
As soon as the button is pressed, the compressed air supply is interrupted.
In order to relieve the pressure on the material side too, withdraw the spray gun
again.
In order to release the locking, pull the button out again.
Fig. 5: Stop button on the pneumatic control
cabinet
Fig. 6: Emergency stop button on
the electrical control cabinet

Safety
Original operating instructions DUOMIX 300 / 333 17
DM333_BAoDB_en_1608 • rs
2.4.5 Rupture discs
The rupture discs prevent a signicant
exceeding of the permissible oper-
ating pressure. They are located in
the threaded connection on the high
pressure lters.
If a rupture disc is damaged, material
from the hose leaks behind the rup-
ture disc and the pump is unable
to build up pressure. In this case,
the rupture disc must be replaced
immediately.
The order data can be found
on the machine card.
A new rupture disc is installed with
the coloured side facing the pressure.
Fig. 7: Rupture disc
Fig. 8: Installation site of the rupture discs
2.4.6 Overpressure valves (optional)
Overpressure valves are only available if
the machine is equipped with feed pumps.
Overpressure valves are located at the ma-
terial outlet of the feed pumps. These open
with increased material pressure. In order
to relieve the pressure, the material runs
back into the respective material tank.
No. Designation
1 Overpressure valve
2 Return from the rupture disc device
of the DUOMIX 300/333
3 Return into the material tank
2
1
3
Fig. 9: Outlet distributor of the feed
pumps
2.4.7 Switch for automatic spray gun (optional)
The on/off switch for the spray gun is an optional acces-
sory.
The switch must be set to the "OFF" position with every
interruption to work, even very brief interruptions.
This safely interrupts the spray process.
Fig. 10: Switch for
spray gun

Safety
18 Original operating instructions DUOMIX 300 / 333
DM333_BAoDB_en_1608 • rs
2.5 Operating and maintenance personnel
2.5.1 Obligations of the machine owner
The machine owner:
➤is responsible for training the operating and maintenance personnel,
➤must instruct the operating and maintenance personnel on correct handling
of the machine, and on wearing the correct work clothing and protective
equipment,
➤must make work aids (such as lifting gear for transporting the machine or
tank) available to the operating and maintenance personnel,
➤must make the user manual accessible to the operating and maintenance
personnel and must ensure that this remains constantly available,
➤must ensure that the operating and maintenance personnel have read and
understood the user manual.
Only then are they permitted to put the machine into operation.
2.5.2 Personnel qualications
Differentiation is made between 2 groups of personnel, depending on their
qualications:
➤Instructed operator has received veried instruction from the machine own-
er regarding the tasks entrusted to him and the possible risks in the event
of incorrect conduct.
➤Trained personnel are capable - due to instruction provided by the machine
manufacturer - of carrying out maintenance and repair work on the ma-
chine, independently recognising possible dangers and avoiding risks.
2.5.3 Authorised operator
Activity Qualication
Set-up and operation Instructed operator
Cleaning Instructed operator
Maintenance Trained personnel
Repair Trained personnel
Young persons under the age of 16 are not permitted to operate this ma-
chine.
2.5.4 Personal protective equipment
Wear protective clothing
Always wear the protective clothing stipulated for your working environment
(e.g. antistatic protective clothing in potentially explosive areas) and also
observe the recommendations in the safety datasheet of the material manu-
facturer.

Safety
Original operating instructions DUOMIX 300 / 333 19
DM333_BAoDB_en_1608 • rs
Use eye protection
Wear safety goggles, in order to prevent eye injuries due to material spray,
gases, vapours or dust.
Use hearing protection
Suitable noise protection equipment must be made available to the operating
personnel. The machine owner is responsible for compliance with the ac-
cident prevention regulation "Noise" (BGV B3). It is therefore necessary to
pay particular attention to the conditions at the installation site – for example
noise pollution can increase if the machine is installed in or on hollow bodies.
Use respiratory protection
Although the airless spray process minimises the material mist with the right
pressure setting and correct method of work, we recommend that you wear
a respirator.
Wear protective gloves
Wear antistatic protective gloves. When processing heated materials, protec-
tive gloves must be additionally equipped with forearm protection in order to
prevent burns.
Wear safety shoes
Wear antistatic safety shoes, in order to prevent foot injuries due to falling,
toppling or rolling objects, as well as slipping on slippery oors.
2.6 Guarantee information
Observe our general terms and conditions of business (T&Cs) at
www.wiwa.de.
2.6.1 Spare parts
➤When repairing and maintaining the machine, only use original spare parts
from WIWA.
➤If spare parts are used, that have not been produced or supplied by WIWA
then the guarantee is voided and all liability shall be excluded.
2.6.2 Accessories
➤If you use original accessories from WIWA, their suitability for use in our
machines is guaranteed.
➤If you use third-party accessories then these must be suitable for the ma-
chine - in particular with respect to the operating pressure, the current
connection data and the connection variables. WIWA shall not be liable for
any damage or injuries arising due to these parts.
➤It is essential to observe the safety provisions applicable to the accesso-
ries. You can nd these safety provisions in the separate operating instruc-
tions for the accessories.

Safety
20 Original operating instructions DUOMIX 300 / 333
DM333_BAoDB_en_1608 • rs
2.7 Behaviour in an emergency
2.7.1 Bring the machine to a standstill and relieve the pressure
In an emergency you must bring the machine to a standstill immediately and
relieve the pressure.
1. Interrupt the energy supply immediately.
➤In the case of versions with electrical pressure and metering monitoring:
Switch off the power supply and unplug the mains plug.
➤In the case of versions with pneumatic pressure and metering monitoring:
Close the compressed air shut-off valve and turn down the compressed
air regulator until it moves easily.
2. Actuate the spray gun briey once more.
3. Open the relief valve on the high pressure lter, so that no further material
pressure is present and the machine has been fully relieved of pressure.
This process is not suitable for decommissioning. The machine is not ushed.
➤For controlled decommissioning please observe Chap. 6.6 Decommis-
sioning on page 68.
➤After remedying the emergency situation, the machine must be ushed
(see Chap. Depending on the type of material supply on your machine, it
is necessary to observe various working steps when ending the material
supply and readying the cleaning uid. on page 64.
Observe the pot life of the materials used.
2.7.2 Leaks
WARNING
In case of leaks, material may escape under very high pressure and cause
serious physical injuries and property damage.
➤Bring the machine to an immediate standstill and relieve the pressure.
➤Tighten threaded connections and replace defective parts (must be per-
formed by trained personnel).
➤Do not seal leaks at connections and on high pressure hoses with
the hand or by wrapping.
➤Do not patch material hoses!
➤Check hoses and threaded connections for leak-tightness when starting
the machine up again.
2.7.3 Injuries
In case of injuries caused by processing material or solvents, always have
the manufacturer's datasheet ready to show the doctor (supplier or manufactur-
er address, their telephone number, material designation and material number).