Anest Iwata MSU-323 C User guide

EN
USE and MAINTENANCE INSTRUCTION MANUAL
MULTI SPRAY
UNITS
HIGH PRESSURE
• MSU-323 C
• MSU-323 CTX
• MSU-423 TX
• MSU-433 TX

2
CONTENTS
USE OF THE MANUAL .................................................................................................................. 3
WARRANTY ................................................................................................................................... 3
1. SAFETY PRECAUTIONS ............................................................................................................... 4
2. TRANSPORT AND HANDLING ..................................................................................................... 6
2.1 TRANSPORT................................................................................................................................... 6
2.2 TRANSPORT WITH CARDBOARD PACKING ................................................................................ 6
2.3 HANDLING...................................................................................................................................... 6
2.4 CHECK ON THE PURCHASED PRODUCT .................................................................................... 7
2.5 TEMPORARY STORAGE ................................................................................................................ 7
3. PRODUCT IDENTIFICATION ........................................................................................................ 8
3.1 PRODUCT SPECIFICATIONS......................................................................................................... 8
3.2 TECHNICAL SPECIFICATIONS ...................................................................................................... 8
3.3 PLATE DATA................................................................................................................................... 9
3.4 COMPLIANCE TO THE STANDARDS............................................................................................. 9
3.5 SAFETY SYSTEMS ....................................................................................................................... 10
3.6 WORKABLE PRODUCTS.............................................................................................................. 11
4. OPERATION................................................................................................................................. 12
4.1 OPERATION DESCRIPTION ......................................................................................................... 12
5. INSTALLATION AND STARTING-UP ......................................................................................... 13
5.1 CONDITIONS FOR INSTALLATION.............................................................................................. 13
5.2 INSTALLATION ............................................................................................................................. 13
6. USE .......................................................................................................................................... 15
6.1 USE .......................................................................................................................................... 15
6.2 SAFETY RULES DURING USE ..................................................................................................... 15
6.3 CLOTHES...................................................................................................................................... 15
6.4 UPPER GASKETS PREWASH AND ADJUSTMENT ..................................................................... 16
6.5 STARTING-UP .............................................................................................................................. 16
6.6 DAILY INTERRUPTIONS............................................................................................................... 17
6.7 WRONG AND DANGEROUS USES.............................................................................................. 18
6.8 PRESSURE RELEASE PROCESS ................................................................................................ 19
7. MAINTENANCE AND INSPECTION ........................................................................................... 19
7.1 GENERAL NOTES......................................................................................................................... 19
7.2 SAFETY RULES DURING MAINTENANCE................................................................................... 19
7.3 RECOMMENDED SCHEDULED OPERATIONS ........................................................................... 19
7.4 DISASSEMBLY AND RE-ASSEMBLY PROCEDURE ................................................................... 20
7.5 MOTOR GROUP DISASSEMBLY ................................................................................................. 20
7.6 MOTOR GROUP MAINTENANCE................................................................................................. 20
7.7 MOTOR GROUP RE-ASSEMBLY................................................................................................. 21
7.8 PNEUMATIC MOTOR DISASSEMBLY FROM THE PUMP ROD.................................................. 21
7.9 PUMP ROD DISASSEMBLY ......................................................................................................... 22
7.10 PUMP ROD MAINTENANCE ........................................................................................................ 22
7.11 PUMP ROD RE-ASSEMBLY......................................................................................................... 22
7.12 MOTOR GROUP RE-ASSEMBLY TO THE PUMP ROD ............................................................... 23
7.13 TESTS TO BE CARRIED OUT AFTER RE-ASSEMBLY ................................................................ 23
7.14 PAINT FILTER MAINTENANCE..................................................................................................... 23
8. SPARE PART LISTS .................................................................................................................... 24
8.1 MULTI SPRAY UNITS SPARE PARTS LIST.................................................................................. 24
8.2 EXPLODED VIEW.......................................................................................................................... 25
9. ACCESSORIES ............................................................................................................................ 26
9.1 MULTI SPRAY ACCESSORIES ..................................................................................................... 26
9.2 DELIVERY FILTER TF-8 ................................................................................................................ 27
9.3 DELIVERY FILTER TF-8N ............................................................................................................. 27
9.4 AIR REGULATOR UNIT for MSU 323 C - MSU 323 C TX............................................................... 27
9.5 AIR REGULATOR UNIT for MSU 423 TX - MSU 433 TX................................................................. 28
9.6 DIP TUBE WITH FILTER ............................................................................................................... 28
9.7 SUCTION COVER ........................................................................................................................ 28
10. TROUBLESHOOTING.................................................................................................................. 29
11. DISMANTLING............................................................................................................................. 31
11.1 EQUIPMENT STORAGE ............................................................................................................... 31
11.2 DISMANTLING.............................................................................................................................. 31

3
USE OF THE The use and maintenance manual is the document accompanying the equipment from its manufactu-
MANUAL re till its dismantling. Therefore, it is an integral part of the equipment.
The manual must be read before starting ANY ACTIVITY involving the equipment including its hand-
ling.
WARNING
THE ORIGINAL CONFIGURATION OF THE EQUIPMENT MUST NOT BE CHANGED AT ALL.
On receiving the equipment check that:
The supply corresponds to the order specifications.
In case of non-compliance, inform immediately our TECHNICAL SERVICES.
WARNING
ALL RIGHTS ARE RESERVED. THE REPRODUCTION OF ANY PART OF THIS MANUAL, IN ANY
FORM, IS STRICTLY FORBIDDEN WITHOUT PRIOR WRITTEN AUTHORIZATION OF THE
MANUFACTURING COMPANY.
WARRANTY All ANEST IWATA products have a one-year guarantee from the invoice date, unless otherwise stated
in writing. The warranty covers all manufacturing faults and material defects.
Any spare part replacement or repair operations are covered only if they are carried out by our techni-
cians at our servicing shops.
The faulty parts must be sent CARRIAGE PAID.
Once the components have been repaired, they will be sent CARRIAGE FORWARD to the customer.
The warranty covers no intervention of our technicians during installation or dismantling operations.
If for practical purposes one of our technicians is sent on site, a charge will be made for the time
plus extra for travelling and expenses.
Our warranty does not cover direct or indirect damage to people or property caused by our equiment.
It covers no repair operations carried out by the customer or by a third party, either.
THE WARRANTY DOES NOT COVER:
- Damage or breakdown caused by improper use or assembly.
- Damage or breakdown caused by the use of spare parts that are different from the original or
recommended ones.
- Damage or breakdown caused by a bad preservation.
- Components subject to wear (described in the spare part list).
WARRANTY FORFEITURE:
- In case of delayed payment or other contractual defaults.
- Whenever changes or repairs are carried out on our equipment without prior authorization.
- Whenever the serial number is damaged or removed.
- When the damage is caused by improper use or functioning, or if the equipment falls, is bumped
or by other causes not due to the normal working conditions.
- Whenever the unit is disassembled, tampered with or repaired without the authorization of
ANEST IWATA.
All repair interventions carried out under warranty do not interrupt its duration.
All disputes will be settled in the court of justice of Turin.

4
1. SAFETY PRECAUTIONS
• Be sure to read and understand this instruction manual. The operator shall be fully conver
sant with the requirements stated within this instruction manual including important warnings,
cautions and operations.
• Wrong operation (mishandling) can cause serious bodily injury, death, fire or explosion.
SAFETY FACTOR
• Pay special attention to items which are shown by the below marks and symbols.
WEAR PROTECTIVE GEAR
During painting, be sure to wear protective gear such as glasses, mask or gloves to avoid serious
injury caused by paints or solvents which might enter your eyes or you might inhale.
BE CAREFUL ABOUT VENTILATION
Use it in a well-ventilated area. Painting or cleaning in a narrow area with insufficient ventilation
can cause organic solvent intoxication or explosion due to sprayed mist of paint or solvent which
catches fire.
If you feel any abnormality during operation, consult a medical doctor immediately.
CONTACT IS FORBIDDEN
If paint leaks, never try to stop it by hand. In that case please proceede as follows:
In the case you feel any abnormality, please proceed as follows:
1. Follow the instructions about relaese pressure procedure, provided in section 6.8.
2. Check the leackage causes.
3. Replace or repair the faulty component.
BE CAREFUL ABOUT BODILY INJURY
Paint can enter human body directly through eyes, mouth or skin. It is very dangerous. If you feel
any abnormality or receive any injury, consult a medical doctor immediately.
LIMIT OF FLUID TO BE USED
Do not use it for food products.
KEEP AWAY FROM ORIGINS OF EXPLOSIONS OR FIRES
Never use near sparks or open fire.
Especially the following will cause fire
• Open flames such as cigarettes, pipes.
• Electric goods such as stoves, lamps or heates.

5
CONNECT GROUNDING
Securely ground the unit, spray gun, workpieces and containers containing paint or solvent.
Be sure to use ground wire set supplied with Multi Spray Unit.
Connect it to ground to have continuous grounding.
Insufficient grounding will cause explosion or fire if exposed to a spark of electricity.
WARNING!
BE CAREFUL ABOUT EXPLOSION
Be sure to use paint pump at less than max. fluid working pressure (section 3.2.).
Use at more than max. fluid operating pressure can cause explosion of pump resulting in great
danger.
Never bend hose with a radius of less than 50mm. Never put heavy things on it (in order not to
damage the hose). If done, hose can explode causing great danger.
Securely connect hose to avoid leak and looseness. If hose is disconnected during operation,
hazardous hose movement and paint ejection at high pressure will cause severe bodily injury.
Never use cracked, damaged, bent, crushed or distorted hose. Leakages from such a hose can
cause great danger during operation.
IMPORTANT
Never alter the equipment
When you replace parts, be sure to always use ANEST IWATA original spare parts. If not done, it
can cause insufficient performance or failure.
Install or keep pump free from rain or splashes. If not done, it can cause pump failure
Install pump on a horizontal surface
Install pump free of paint mist. Attached paint mist etc., can cause pump failure.
Do not run the pump idle.
Do not spray paint or solvents towards the pump.
Use clean air filtered through dryer and filter (finer than 50 microns). If not done, it can cause
pump failure.
* We shall not be responsible for any injury or damage caused by disregard of warnings, cau-
tions or instructions.

6
2. TRANSPORT AND HANDLING
2.1 TRANSPORT
To transport the equipment only the systems described below can be used. In any case make sure
that the transport and lifting device can bear the weight of the equipment with its packaging.
WARNING
ALWAYS KEEP THE PACKAGING IN VERTICAL POSITION.
WARNING
IT IS ADVISABLE THAT THE STAFF IN CHARGE OF HANDLING THE EQUIPMENT WEAR
PROTECTIVE GLOVES AND SAFETY SHOES.
WARNING
WHILE LIFTING OR HANDLING THE EQUIPMENT OR ANY OF ITS COMPONENTS CLEAR THE
WORKING AREA. LEAVE ALSO A SUFFICIENT SAFETY AREA AROUND THE EQUIPMENT TO
AVOID DAMAGING PEOPLE OR OBJECTS WHICH COULD BE THERE.
2.2 TRANSPORT WITH CARDBOARD PACKAGING
The equipment is put inside a cardboard packaging and wrapped with some shockproof material.
2.3 HANDLING
To handle the cardboard packaging use a trolley.
WARNING
FOLLOW THE INSTRUCTIONS ON THE PACKAGING BEFORE HANDLING AND OPENING IT.
HANDLING BY MEANS OF HANDLE HANDLING BY MEANS OF TROLLEY

7
2.4 CHECK ON THE PURCHASED PRODUCT
When you receive and before using the pump, make sure it has not been damaged during tran
sport or storage. Also check that all standard components are inside the packaging.
2.5 TEMPORARY STORAGE
During transport and storage make sure the temperatures between 0 and 40° C are not exceeded.
In case of storage, make sure the equipment is not put in places with an excessive humidity.

8
3.2 TECHNICAL SPECIFICATIONS
3. PRODUCT IDENTIFICATIONS
3.1 PRODUCT SPECIFICATIONS
MODELS MSU-323 C MSU-323 CTX MSU-423 TX MSU-433 TX
Pump unit PP1171 C PP1171 CNE PP4231 NE PP4301 CNE
Dimensions (mm) 500x500x900 500x500x900 500x500x970
Weight 23 kg 28 kg 35 kg 30 kg
Air nipple G 1/4”
Fluid nipple G 1/4”
Delivery paint lter TF-8 TF-8N TF-8N TF-8N
Dip tube lter 50 mesh 50 mesh 30 mesh 30 mesh
Max. working air pressure 6.8 bar
Compression ratio 17:1 17:1 23:1 30:1
Max. uid output 3.4 l/min 3.4 l/min 8.0 l/min 5.0 l/min
Delivery/cycle ~ 38 ml/cycle ~ 38 ml/cycle ~ 80 ml/cycle ~ 59 ml/cycle
Max. No. of cycles per minute 90 cycles /min 90 cycles /min 100 cycles /min 90 cycles /min
Cycle stroke 58 mm 58 mm 93 mm 93 mm
Compressor (required power) > di 0.75 Kw > di 0.75 Kw > di 1.5 Kw > di 1.5 Kw
Working temperature 5 ~40 °C
Noise level 84.1 dB(A)* 84.1 dB(A)* 78.1 dB(A)* 78.1 dB(A)*
MSU-323 C
MSU-323 C: STANDARD Version
Pump unit PP1171 C mounted on cart, with 2 air regulators (for pump and for gun),
dip tube with filter, delivery paint filter unit, fluid recirculation hose , overpressure
valve .
MSU-323 CTX
MSU-323 CTX: WATER BASE PAINT Version
Pump unit PP1171 CNE mounted on cart, with 2 air regulators (for pump and for gun),
dip tube with filter, delivery paint filter unit, fluid recirculation hose , overpressure
valve . Paint passages in Stainless Steel.
MSU-423 TX
MSU-423 TX: WATER BASE PAINT Version
Pump unit PP4231 NE mounted on cart, with 2 air regulators (for pump and for gun),
dip tube with filter, delivery paint filter unit, fluid recirculation hose , overpressure
valve . Paint passages in Stainless Steel.
MSU-433 TX
MSU-433 TX: WATER BASE PAINT Version
Pump unit PP4301 CNE mounted on cart, with 2 air regulators (for pump and for gun),
dip tube with filter, delivery paint filter unit, fluid recirculation hose , overpressure
valve . Paint passages in Stainless Steel.

9
3.3 PLATE DATA
The manufacturer’s identification plate is applied on the Multi Spray Unit (see picture below).
It must not be removed at all, even if the equipment is resold. For any communication with the
manufacturer always mention the serial number written on the plate itself.
3.4 COMPLIANCE TO THE STANDARDS
All the units are conceived in compliance with the applicable Essential Safety Requirements of the
Machinery Directive 2006/42/EC.
The units are also designed and manufactured in compliance with the Essential Safety Requirements
(ESR) of Annex II of Directive "ATEX" 2014/34/EU and they comply with the following classifica-
tion:
• Equipment group : II
• Category: Gas 2G (Suitable for use in zones 1 and 2)
• Max. surface temperature: temperature class T6
• X marking : Any static electricity discharge from the pump is to be diverted to the ground through
the grounding wire which is included in this product.
MAX AIR W. P.R. RATIO SERIAL NO.
0.68 MPa / 6.8 bar / 98 psi 17:1
MANUFACTURED
MSU 323 C - MULTI SPRAY UNIT
ANEST IWATA Strategic Center S.r.l.
C.so Vigevano,46
10155 Torino Italy
Serial number
Model
Max. working air pressure

10
3.5 SAFETY SYSTEM
Several safety systems have been conceived during the Multi Spray Unit design and manufacture to
safeguard the operator, as it prescribed by all applicable safety regulations.
SAFETY INFORMATION
In case of units that are to be used in areas with potentially explosive atmospheres, before starting
working the operators must disable the unit power supply, by putting it “out of order”. They also
must ensure that the unit cannot be restarted unintentionally.
All further necessary environmental safety measures must be adopted (such as the elimination of
gas or residual dusts, etc.).
SAFETY VALVE
A 8 bar calibrated safety valve is installed to ensure the pump working pressure does not exceed
the limits inside the feeding circuit.
If the calibration pressure is exceeded, the valve opens by releasing the excess of air.
WARNING
DO NOT REMOVE THE VALVE PLASTIC PROTECTION. ANY TAMPERING WITH COULD BE
DANGEROUS FOR THE OPERATOR AND COMPROMISE THE EQUIPMENT GOOD WORKING.
BALL VALVE
In case of anomalies during working, turn 90° the ball valve lever. In this way the air supply will be
interrupted and the residual pressure inside the pump will be released.

11
SAFETY PICTOGRAMS
Some pictograms can be found on the pump with the safety warnings to follow by anyone who is
going to use it.
WARNING
THE MANUFACTURING COMPANY IS NOT TO BE HELD RESPONSIBLE FOR DAMAGE OR
ACCIDENTS TO PEOPLE OR THINGS COMING FROM THE NON-COMPLIANCE WITH THE
PRESCRIBED RULES.THE RESPONSIBILITY RESTS ENTIRELY WITH THE OPERATOR HIM
SELF.
3.6 WORKABLE PRODUCTS
All Multi Spray Units ANEST IWATA are conceived to paint ferrous material in general, wood and
plastic.
Model MSU 323 C is designed for paints with a maximum viscosity of 85 sec/Ford #4
(100 sec/NK-2). We don't recommend the use of this model with water-based paints.
Model MSU 323 CTX is designed for paints of medium viscosity.
Models MSU 423 TX and MSU 433 TX are intended for high viscosity and water-based paints
also.
To use the equipment with special products ask for the approval of the manufacturer.
Moreover, the technical features of the unit must be adapted for processing such products.
ANEST IWATA is not liable for any accident due to UNAUTHORISED and non qualified personnel
using the pump or personnel using it for purposes that are different from the above-mentioned ones.
WARNING
DO NOT USE:
- ANY HALOGENATED HYDROCARBON SOLVENTS, SUCH AS TRICHLOROETHANE, METHYLENE
CHLORIDE OR SOMETHING LIKE THAT;
- ANY TOXIC PRODUCTS SUCH AS PETROL, KEROSENE OR COMBUSTIBLE GASES;
- ANY HERBICIDE OR PESTICIDE
- ANY RADIOACTIVE FLUID

12
4.1 OPERATION DESCRIPTION
Multi Spray Unit are composed of two main parts: the pneumatic motor and the pumping unit.
The pneumatic motor is provided with an internal valve system for changing the movement direction.
The pumping unit is composed of an anti-wear chromium plated suction body (liner) and a rod.
The gaskets can be adjusted.
The motor straight and alternate movement produces an equivalent movement in the pumping unit.
A system of valves allows the simultaneous suction and pressurisation of the product to be sprayed,
in the two chambers of the suction body,therefore guaranteeing the utmost uniformity during the appli-
cation.
4. FUNZIONAMENTO
MOTOR
PUMP
Air cylinder
Change-over valve
Pneumatic piston
Air inlet
Rod
Upper lip seal
Material outlet
Lower lip seal
Suction body
Material inlet
Air outlet
PIC. 1

13
5.1 CONDITION FOR INSTALLATION
• The installer must know the ATEX classification of the installation area, as well as the risks coming
from a potentially explosive atmosphere, by paying attention to the explosion and fire risks so as to
adopt the most suitable protections.
• All maintenance, assembly and disassembly operations must be carried out by a qualified staff
outside the area at risk of explosion.
• Also check that the accessories comply with the essential safety requirements of the ATEX direc-
tives. Handle them with great care to avoid changing their features.
• Once installed, clean the unit.
• Use antistatic hoses for connection of Multi Spray Unit and spray gun.
The equipment must be installed by a specialized and authorized staff.
In any case, follow the instructions below.
Painting must preferably take place inside a suitable spray booth equipped with suction device.
Do not use the unit if the suction device is off.
WARNING
IF PAINTING IS CARRIED OUT OUTSIDE THE SPRAY BOOTH, ALWAYS OPERATE IN A PLACE
WITH A RIGHT VENTILATION TO AVOID CONCENTRATING INFLAMMABLE VAPOURS COMING
FROM SOLVENTS OR PAINTS.
5.2 INSTALLATION
- Place the equipment on the floor, on a horizontal surface.
- Secure it firmly to the ground by means of the trolley fastening bracket (pic.2 on page 14).
- Connect the dip tube steadily (pos. A in pic. 2 on page 14) and the recirculation hose (pos. B in pic. 2
on page 14).
- Connect the twin hose for air and paint, to air regulator and to delivery paint filter.
- Earth the free end of the ground cable directly.
- Connect the Multi Spray gun to the other end of the air/paint twin hose.
- Connect the air supply hose to the unit.
WARNING
- CHECK THE PROPER TIGHTENING OF ALL FITTINGS, SINCE THEIR SUDDEN OPENING CAN
SERIOUSLY INJURE PEOPLE.
WARNING
- CONSULT THE LOCAL CODE FOR DETAILED INSTRUCTIONS RELATIVE TO GROUND CON-
NECTIONS IN THE WORK AREA AND TO THE TYPE OF SYSTEM USED.
- THE GROUND CABLE (INCLUDED IN THE SUPPLY) MUST HAVE A MINIMUM SECTION
EQUAL TO 1.5 mm
2
.
- ONE END OF THE CABLE MUST BE EARTHEN WHILE THE OTHER MUST BE CONNECTED
TO THE LID OF THE PNEUMATIC MOTOR SILENCER.
5. INSTALLATION AND STARTING

14
INSTALLATION SCHEME
PAINT OUTLET
RECIRCULATION
VALVE (C)
UPPER GASKETS ADJUSTING
CUP (D)
MATERIAL RECIR-
CULATION HOSE (B)
TROLLEY FASTENING
BRACKET
AIR INLET
PAINT
INLET
GROUND CABLE
SUCTION HOSE
SAFETY SPRING
PIC. 2

15
6. USE
6.1 USE
This section describes the Multi Spray Unit use in compliance with the safety standards in force.
Read this section carefully.
LIMITS AND CONDITIONS OF USE
Any modification to the constructive shape or to the assembling position is allowed only after
asking for ANEST IWATA technical service authorization.
If there is no authorization the ATEX approval in no longer valid.
ENVIRONMENTAL CONDITIONS
Room temperature: min. + 5°C; max. +40°C
The plate data of the maximum superficial temperatures refer to measures taken in normal environ-
mental conditions and to a normal installation.
Any minimum variation of these conditions can greatly affect the heat development.
6.2 SAFETY RULES DURING USE
TO USE the Multi Spray Unit COMPLY WITH the safety precautions and rules described below.
The manufacturing company declines all responsibility if the operator does not comply with
them. It is not to be held responsible for any carelessness during the pump use, either.
- If the system is used improperly, it could be broken by causing serious damage.
- Use the Multi Spray Unit for professional purposes only.
- Do not change the system; use only Anest Iwata original spare parts.
- Check the system daily: repair or replace immediately all worn or damaged parts.
- Never exceed the maximum working pressure: 6.8 bar.
- IT IS FORBIDDEN to use the equipment for purposes that are different from the ones it is
destined to which are described in the use and maintenance manual. If in doubt, apply to
your ANEST IWATA reseller.
- Use paints and solvents compatible with the system parts they come in touch with.
- Refer to the paint and solvent features mentioned by the manufacturer.
- Wear the protective clothes described in section 6.3.
- Comply with all the local standards on electric safety and fire risks.
6.3 CLOTHES
Wear some protective gloves and goggles, an oxygen mask and some ear protections during
working. In any case, follow the references of the current regulations.

16
6.4 PREWASH AND ADJUSTMENT OF UPPER PACKING
1. Make sure the pump has been properly installed; (see point 5.2)
2. Immerse dip tube (pos. 5 on page 26) in the cleaning liquid (clean solvent or water, according to
the purchased model).
3. Place the ball valve (pos.3-8 on page 27 and 28) in the proper position.
4. Open the recirculation valve (pos. C in pic. 2 on page 14) located on the paint filter.
5. Loosen the upper gaskets adjusting cup (pos. D in pic. 2 on page 14).
6. Gradually open the air pressure regulator up to the minimum pressure required for the straight
and alternate movement of the pump (about 0.5 bar).
7. Adjust the upper gaskets by gradually tightening the adjusting cup (pos. D in pic. 2 on page 14)
until stopping the cleaning liquid outflow, and the pump movement.
NOTE: The failure to observe this point as well as an improper initial adjustment of the
gaskets might reduce their duration.
8. Once the gaskets have been adjusted, increase the air supply pressure (up to about 2 bar) and
let the cleaning liquid flow in the recirculation hose for a few minutes.
9. Close the recirculation valve (pos. C in pic. 2 on page 14), clean the paint hose and the gun by
keeping its trigger pulled.
10. Once you are sure the cleaning has been properly carried out, lift the dip tube from the vessel
containing the cleaning liquid and let the residual liquid flow out of the gun first, and then from
the recirculation hose.
WARNING
THE PUMP MUST BE CLEANED BEFORE USING IT FOR THE FIRST TIME, IF IT IS NOT USED
FOR A LONG TIME AND AFTER ANY COLOUR CHANGE.
6.5 STARTING UP
Before beginning working, start the pump by following the instructions below:
1. Dip the dip tube in the tank with the product to be pumped.
2. Open the two-way valve for paint recirculation (pos. C in pic. 2 on page 14).
3. Lift and gradually turn the pressure reducer knob (3-2 on page 27 and 28). Adjust it at a pressure
slightly higher than 2.0 bar, to enable the pump to release the air.
4. Close the two-way valve for paint recirculation (pos. C in pic. 2 on page 14) and release the air
through the gun, as well.
5. Increase the pressure of the reducer connected to the pump, according to the desired working
pressure.

17
PRECAUTIONS
a) Use Multi Spray guns only.
b) When the paint level inside the tank decreases, the pump might suck some air. Increase the
level of paint.
b) Do not drag the pump by pulling it by the hoses.
d) Do not spray towards the eyes or towards other people.
CAUTIONS: EMERGENCY STOP
Whenever the pump must be stopped due to one of the following reasons:
a) The material never stops coming out of the gun
b) Fluid discharge through the connectors or the damaged hose.
THEN, close the BALL VALVE ( pos. 3-8 on page 27 and 28 ).
WARNING
a) When assembling or removing the gun nozzle, always bock the trigger by means of the safety
catch.
b) Never exceed the maximum working pressure (6.8 bar).
c) Always use an ANEST IWATA Multi Spray gun, which is provided with various safety devices.
d) During functioning, never touch the moving parts. Before carrying out any maintenance operation
disconnect the air supply and discharge the residual pressure.
6.6 DAILY INTERRUPTIONS
1. Upon suspending the use of the pump:
- It is not necessary to disconnect the air supply if the interruption is short.
- If the interruption is long, turn the ball valve (pos. 3-8 on page 27 and 28), discharge the air
from the circuit and open the recirculation valve (pos. C in pic. 2 on page 14) to release the residual
fluid pressure.
2. When the pump is stopped at the end of the working day:
- Clean the fluid passages.
- Remove the dip tube filter, the filter inside the delivery paint filter and the gun filter, and clean them.

18
6.7 WRONG AND DANGEROUS USES
A wrong earthing, an insufficient ventilation, a naked flame or a spark can cause a fire or an
explosion and provoke some serious injuries.
WARNING
IF SOME SPARKS OR AN ELECTRIC DISCHARGE WERE PERCEIVED, INTERRUPT IMMEDIATELY
ALL PAINTING OPERATIONS.
DO NOT USE THE SYSTEM UNTIL THE PROBLEM CAUSE IS IDENTIFIED.
Keep away from the working area all kinds of waste, of solvent container, of solvent or petrol soaked
rags or clothes.
Before starting the system disconnect all the electrical connections inside the working area.
Before using the system switch off all the naked flames and pilot lights inside the working area.
Do not smoke inside the working area.
During painting operations, or if there are some vapours in the air, do not switch on or off the lights
inside the working area.
Do not use any petrol engine inside the working area.
Some organic solvents or discharged toxic vapours can enter the eyes or the skin, be swallowed or
inhaled, by provoking serious injuries.
When the air engine is running, keep the face away from the exhaust.
6.8 PRESSURE RELEASE PROCESS
WARNING
1. Close the air supply to the pump by turning the pressure reducer adjustment counter-clockwise
down to 0 bar.
2. Activate the safety catch of the Multi Spray gun trigger.
3. Make sure the recirculation hose is not clogged, then gradually open the recirculation ball valve,
and leave it open.
4. Hold the gun tightly and lean it against the metal vessel with the paint. Remove the safety catch
of the Multi Spray gun trigger, and gently pull the trigger to release the pressure inside the paint
hose and inside the gun.
5. Block the Multi Spray gun trigger once more by means of the safety catch.
6. If you believe the pressure has not been fully released by following the instructions provided in
point 4, loosen the gun nozzle carrier to gradually release the residual pressure, then loosen it
completely. Clean the fluid passage ducts.

19
7.1 GENERALS NOTE
• Comply with the inspection and ordinary maintenance intervals so as to ensure suitable working
conditions and explosion-proof protection.
• Before carrying out any maintenance operation or repair on the internal parts, delay the opening
of the unit and wait till it is completely cool to avoid any burning risk due to the presence of hot
parts.
• After the maintenance intervention, make sure that all the safety measures are completely and
correctly restored.
• Once the maintenance operations/repairs have come to an end, clean the whole unit.
• Use only original spare parts for repairs.
A suitable maintenance is important for a longer duration of the equipment in good working condi-
tions and efficiency ensuring functional safety as time goes by.
All maintenance operations must be carried out by a qualified staff. The pump design and the mate-
rials used to manufacture it limit the maintenance interventions to a simple periodic cleaning.
The staff must be provided with the individual protections that are generally used for similar opera-
tions. They also must follow the safety rules described in section 7.2.
7.2 SAFETY RULES DURING MAINTENANCE
Le principali attenzioni da adottare in occasione di interventi manutentivi sull’unità sono:
1. Disconnect the pneumatic supply before replacing any component.
2. Do not wear rings, watches, chains, bracelets, etc. during maintenance operations.
3. Always use the individual protections (gloves, safety shoes, etc.).
4. Do not use naked flames, points or pins for cleaning.
5. Do not smoke.
7.3 RECOMMENDED SCHEDULED OPERATIONS
Daily A. Clean the nozzle, the gun paint filter and the delivery paint filter.
maintenance B. Clean all parts in touch with paint.
C. Check the good-working order of the safety devices.
Every 50 A. Clean the inside of the paint passage ducts, especially if highly pigmented paints o r paints with
working hours many particles tending to deposit are used.
B. Clean the dip tube inlet filter.
Every 100 A. Clean the inside of the paint passage ducts, using a product able to remove all traces of depo-
working hours sited paint.
Every 300 A. Inspect and tighten the lip seals of the pump motor.
working hours
Every 500 A. Grease all motor and air cylinder sliding parts.
working hours
Every 1000 A. Disassemble all components and clean them thoroughly.
working hours B. Replace all worn out components.
7. MAINTENANCE AND INSPECTION

20
7.4 DISASSEMBLY AND RE-ASSEMBLY PROCEDURE
WARNING
BEFORE STARTING ANY MAINTENANCE OPERATION REMOVE THE AIR SUPPLY HOSE AND MAKE
SURE THE INNER RESIDUAL PRESSURE HAS BEEN RELEASED.
NOTE: The numbering of the follows components refers to the exploded view drawings of Multi Spray
Unit in chapter 8.0.
7.5 MOTOR DISASSEMBLY
1. Remove the handle (1), the two nuts (3), the handle gasket (2) and unscrew the cylinder nut (4)
2. Unscrew the air cylinder fixing bolts (31) and disassemble the cylinder itself (6)
3. Push the change-over body downwards and unscrew the valves adjusting nuts (13). During this operation,
keep the adjusting valves (23) blocked by means of a slotted screwdriver.
4. Unscrew the two valves (23) from the change-over bar (12) and slip them off.
5. Lifting the change-over rod (15), it is possible to remove the two pins (8), the change-over pivot (9),
the change-over body (7), the springs (10) and the change-over bar (12).
7.6 MOTOR MAINTENANCE
Any time the motor is disassembled it is recommended to replace the following components:
- 5 O RING
- 16 O RING
- 17 INNER VALVE
- 23 OUTER VALVE
- 26 O RING
- 27 O RING
Moreover, check the wear condition of all the other components, and if necessary replace
them.
c
hange-over rod (15)
change-over body (7)
spring (10)
nut (13)
change-over pivot (9)
change-over bar (12)
valve (23)
pin (8)
PIC. 3