Larius MIRO Series Operating manual

ENGLISH
OPERATING AND MAINTENANCE INSTRUCTION
OPERATING AND MAINTENANCE INSTRUCTION
PAINT SPRAYING EQUIPMENT
Ed. 009 02 - 13

Due to a constant product improvement programme, the factory reserves the right to modify technical
details mentioned in this manual without prior notice.
This manual is to be considered as an English language translation of the original manual in Italian.
The manufacturer shall bear no responsibility for any damages or inconveniences that may arise due
to the incorrect translation of the instructions contained within the original manual in Italian.

English
1
WE ADVISE THE USE OF THIS EQUIPMENT ONLY BY PROFESSIONAL OPERATORS.
ONLY USE THIS MACHINE FOR USAGE SPECIFICALLY MENTIONED IN THIS MANUAL.
Thank you for choosing a LARIUS S.R.L. product.
As well as the product purchased,
you will receive a range of support services
enabling you to achieve the results desired,
quickly and professionally.
INTRODUCTION .................................................. p.1
WARNING ............................................................ p.2
WORKING PRINCIPLE ........................................ p.3
TECHNICAL DATA ............................................... p.4
DESCRIPTION OF THE EQUIPMENT ................ p.5
TRANSPORT AND UNPACKING ........................ p.7
SAFETY RULES ................................................... p.7
Electrical safety precautions ............................ p.8
SETTING-UP ........................................................ p.8
Connection of the flexible hose to the gun ....... p.8
Check on power supply .................................... p.8
Connection of the tooling to the power supply . p.9
Washing of the new equipment ........................ p.9
Preparation of the paint .................................... p.11
WORKING ............................................................ p.11
Start of the painting operations ........................ p.11
Spray adjustment ............................................. p.12
CLEANING AT THE END WORK ......................... p.13
ROUTINE MAINTENANCE .................................. p.15
Top up hydraulic oil ............................................... p.15
Release the suction valve ..................................... p.15
Cleaning the compression valve ...................... p.15
Replacing hydraulic oil ..................................... p.17
Cleaning the motor cooling fan guard .............. p.18
WARNING PLATE ................................................ p.18
PROBLEMS AND SOLUTIONS
............................. p.19
CORRECT PROCEDURE OF DECOMPRESSION . p.20
SPARE PARTS
COMPLETE HYDRAULIC BODY ......................... p.22
COMPLETE COLOUR BODY ............................... p.24
VERTICAL SUCTION SYSTEM ........................... p.25
HORIZONTAL SUCTION SYSTEM ...................... p.26
HIGH PRESSURE GUN AT 250 ........................... p.27
TROLLEY ASSEMBLY ......................................... p.28
Wheeled carriage assembly ............................. p.28
Fixed chassis assembly ................................... p.28
Petrol engine carriage ...................................... p.29
COMPLETE PETROL ENGINE CASING ............. p.30
ACCESSORIES .................................................... p.32
VERSIONS ........................................................... p.36
ELECTRIC DIAPHRAGM PUMP
ELECTRIC DIAPHRAGM PUMP
A
B
C
D
E
F
G
H
L
M
N
O
P
Q
R
S
T
U
IZ
V

English
2
Read this operator’s manual carefully before using the equipment.
An improper use of this machine can cause injuries to people or things.
Do not use this machine when under the influence of drugs or alcohol.
Do not modify the equipment under any circumstances.
Use products and solvents that are compatible with the various parts of the equipment, and read the manufacturer’s warnings carefully.
See the Technical Details for the equipment given in the Manual.
Check the equipment for worn parts once a day. If any worn parts are found, replace them using ONLY original spare parts.
Keep children and animals away from work area.
Comply with all safety standards.
It indicates an accident risk or serious damage to equipment if this warning is not followed.
It indicates important recommendations about disposal and recycling process of products in accordance with the environmental
regulations.
WARNINGS The table below provides the meaning of the symbols used in this manual in relation to using, earthing,
operating, maintaining, and repairing of this equipment.
It indicates a fire or explosion risk if this warning is not followed.
Eliminate all ignition sources such as pilot lights, cigarettes, portable electric lamps and plastic drop cloths.
Keep work area free of debris.
ONLY use this equipment in a well ventilated area.
EARTH ALL THE EQUIPMENT LOCATED IN THE WORK AREA.
Do not form connections or switch light switches on or off if the air contains inflammable fumes.
If electrical shocks or discharges are encountered the operation being carried out using the equipment must be stopped immediately.
Keep a fire extinguisher at hand in the immediate vicinity of the work area.
It indicates wound and finger squashing risk due to movable parts in the equipment.
Tenersi lontano dalle parti in movimento.
Do not use the equipment without the proper protection.
Before any inspection or maintenance of the equipment, carry out the decompression procedure explained in this manual, and prevent
any risk of the equipment starting unexpectedly.
Report any risk of chemical reaction or explosion if this warning has not been given.
There is a risk of injury or serious lesion related to contact with the jet from the spray gun. If this should occur, IMMEDIATELY contact
a doctor, indicating the type of product injected.
Do not spray before the guard has been placed over the nozzle and the trigger on the spray gun.
Do not put your fingers in the spray gun nozzle.
Once work has been completed, before carrying out any maintenance, complete the decompression procedure explained in this
manual.
Report any danger of electric shock if the warning and presence of live electrical parts has not been indicated.
Store in a dry place and do not expose to the rain.
Check that the cables are in good condition.
Switch off the equipment and discharge any electricity before cleaning or maintaining the equipment.
Mark any clamps attached to earth cables.
Use ONLY 3-wire extension cords and grounded electrical outlets.
Before starting work make sure that the electrical system is earthed and that it complies with safety standards.
It is obligatory to wear suitable clothing as gloves, goggles and face shield.
Wear clothing that complies with the safety standards in force in the country in which the equipment is used.
Do not wear bracelets, earrings, rings, chains, or anything else that may hinder the operator’s work.
Do not wear clothing with wide sleeves, scarves, ties, or any other piece of clothing that could get tangled up in moving parts of the
equipment during the work, inspection, or maintenance cycles.

English
3
AWORKING PRINCIPLE
The LARIUS MIRÒ unit is defined as an “electric diaphragm
pump”. An electric diaphragm pump is used for high pressure
paint spraying without air (known as “airless”).
The pump is powered by an electric (internal combustion) motor
coupled with a cam shaft. The shaft acts on the hydraulic piston
as it pumps oil from the hydraulic case and sends the suction
diaphragm into fibrillation. When the diaphragm moves, it creates
a vacuum.
The product is sucked up, pushed towards the pump outlet and
sent to the guns through the flexible hose . A hydraulic valve on
the hydraulic case head allows setting and checking the pressure
of the paint product at the pump outlet. A second hydraulic safety
valve to avoid over-pressure, ensures total equipment reliability.
The hydraulic box allows to convert the vertical gravity hopper
version (A1) to horizontal suction version (A2).
MIRO' Vertical suction MIRO' Horizontal suction
Indoor
Outdoor
Industrial buildings
Industrial constructions
Redeveloping
Roofing
Fields of application
Lacquer
Waterborne
Acrylic
Primers
Enamels
Fixative
Application materials
Paints
Emulsions
Fillers
Rust preventer
Primer
A1
A2

English
4
B
*Available on request with special voltages
PARTS OF THE PUMP IN CONTACT WITH THE MATERIAL Stainless Steel AISI 420B, Teflon, Aluminium.
SUPPLY ( single-phase, Three-phase internal com-
bustion supply, petrol-diesel )*
MOTOR POWER Mono-threephase
Internal combustion
MAX. WORKING PRESSURE
MAX. DELIVERY
WEIGHT
LENGTH
WIDTH
HEIGHT
TECHNICAL DATA
MIRÒ on frame
230V 50Hz
0,75 kW
220 bar
2,2 L/min
20 Kg
(A) 440 mm
(B) 400 mm
(C) 500 mm
230V 50Hz
0,75 kW
220 bar
2,2 L/min
23 Kg
(A) 400 mm
(B) 400 mm
(C) 900 mm
MIRÒ on trolley
MIRO' Vertical suction
MIRO' Horizontal suction
C
B
A
C
B
A

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5
CDESCRIPTION OF THE EQUIPMENT
MIRO' HORIZONTAL SUCTION
POS.
1
2
3
4
5
6
Carriage
Electric / combustion motor
High pressure manometer
Setting valve
Hydraulic oil filling cap
Hydraulic body
Description POS.
7
8
9
10
11
12
Colour body
Suction tube
Recirculation tube
LARIUS AT 250 gun
High pressure feed tube
Circulation tap
Description
3
7
1
5
6
2
9
8
10
3
4
12
11
124

English
6
MIRO' VERTICAL SUCTION
POS.
1
2
3
4
5
6
Electric / combustion motor
High pressure manometer
Setting valve
Hydraulic oil filling cap
Hydraulic body
Colour body
Description POS.
7
8
9
10
11
12
Tank
Circulation tap
Recirculation tube
Feed tube connection
Feed tube
LARIUS AT 250 gun
Description
83
9
1
2
6
3
5
12
11
7
7
10
4

English
7
D
E
TRANSPORT AND
UNPACKING
• The packed parts should be handled as indicated in the
symbols and markings on the outside of the packing.
• Before installing the equipment, ensure that the area to
be used is large enough for such purposes, is properly
lit and has a clean, smooth floor surface.
SAFETY RULES
• THE EMPLOYER SHALL TRAIN ITS EMPLOYEES
ABOUT ALL THOSE RISKS STEMMING FROM ACCI-
DENTS, ABOUT THE USE OF SAFETY DEVICES FOR
THEIR OWN SAFETY AND ABOUT THE GENERAL
RULES FOR ACCIDENT PREVENTION IN COMPLIAN-
CE WITH INTERNATIONAL REGULATIONS AND WITH
THE LAWS OF THE COUNTRY WHERE THE PLANT
IS USED.
• THE BEHAVIOUR OF THE EMPLOYEES SHALL STRICTLY
COMPLY WITH THE ACCIDENT PREVENTION AND
ALSO ENVIRONMENTAL REGULATIONS IN FORCE IN
THE COUNTRY WHERE THE PLANT IS INSTALLED AND
USED.
The user is responsible for the operations of unloa-
ding and handling and should use the maximum
care so as not to damage the individual parts or
injure anyone.
To perform the unloading operation, use only
qualified and trained personnel (truck and crane
operators, etc.) and also suitable hoisting equipment
for the weight of the installation or its parts.
Follow carefully all the safety rules.
The personnel must be equipped with the necessary
safety clothing.
• The manufacturer will not be responsible for the unloading
operations and transport to the workplace of the machine.
• Check the packing is undamaged on receipt of the equi-
pment. Unpack the machine and verify if there has been
any damage due to transportation.
In case of damage, call immediately LARIUS and the
Shipping Agent. All the notices about possible damage or
anomalies must arrive timely within 8 days at least from
the date of receipt of the plant through Registered Letter
to the Shipping Agent and to LARIUS.
The disposal of packaging materials is a customer’s
competence and must be performed in accordance
with the regulations in force in the country where the
plant is installed and used.It is nevertheless sound
practice to recycle packaging materials in an envi-
ronment-friendly manner as much as possible.
• KEEP YOUR WORK PLACE CLEAN AND TIDY. DISORDER
WHERE YOU ARE WORKING CREATES A POTENTIAL
RISK OF ACCIDENTS.
• ALWAYS KEEP PROPER BALANCE AVOIDING UNUSUAL
STANCE.
• BEFORE USING THE TOOL, ENSURE THERE ARE NOT
DAMAGED PARTS AND THE MACHINE CAN WORK PRO-
PERLY.
• ALWAYS FOLLOW THE INSTRUCTIONS ABOUT SAFETY
AND THE REGULATIONS IN FORCE.
• KEEP THOSE WHO ARE NOT RESPONSIBLE FOR THE
EQUIPMENT OUT OF THE WORK AREA.
• NEVER EXCEED THE MAXIMUM WORKING PRESSURE
INDICATED.
• NEVER POINT THE SPRAY GUN AT YOURSELVES OR AT
OTHER PEOPLE. THE CONTACT WITH THE CASTING CAN
CAUSE SERIOUS INJURIES.
• IN CASE OF INJURIES CAUSED BY THE GUN CASTING,
SEEK IMMEDIATE MEDICAL ADVICE SPECIFYING THE
TYPE OF THE PRODUCT INJECTED. NEVER UNDER-
VALUE A WOUND CAUSED BY THE INJECTION OF A
FLUID.
• ALWAYS TO STOP ENGINE AND RELEASE THE PRESSU-
RE IN THE CIRCUIT BEFORE PERFORMING ANY CHECK
OR PART REPLACEMENT OF THE EQUIPMENT.
• NEVER MODIFY ANY PART IN THE EQUIPMENT. CHECK
REGULARLY THE COMPONENTS OF THE SYSTEM.
REPLACE THE PARTS DAMAGED OR WORN.
Read carefully and entirely the following instruc-
tions before using the product.
Please save these instructions in a safe place.
The unauthorised tampering/replacement of one
or more parts composing the machine, the use
of accessories, tools, expendable materials other
than those recommended by the manufacturer can
be a danger of accident.
The manufacturer will be relieved from tort and
criminal liability.

English
8
FSETTING-UP
CONNECTION OF THE FLEXIBLE HOSE TO THE GUN
• Connect the high pressure flexible hose to the pump and
to the gun, ensuring to tighten the fittings (the use of two
wrenches is suggested).
NEVER use sealants on fittings’ threads.
• It is recommended to use the hose provided with the standard
kit (ref. 35017).
NEVER use a damaged or a repaired flexible hose.
CHECK ON POWER SUPPLY
• NEVER SPRAY OVER FLAMMABLE PRODUCTS OR
SOLVENTS IN CLOSED PLACES.
• NEVER USE THE TOOLING IN PRESENCE OF POTEN-
TIALLY EXPLOSIVE GAS.
The high speed of travel of the product in the hose
can create static electricity through discharges and
sparks. It is suggested to earth the equipment.
The pump is earthed through the earth cable of
the supply. The gun is earthed through the high
pressure flexible hose. All the conductors near
the work area must be earthed.
• TIGHTEN AND CHECK ALL THE FITTINGS FOR
CONNECTION BETWEEN PUMP, FLEXIBLE HOSE AND
SPRAY GUN BEFORE USING THE EQUIPMENT.
• ALWAYS USE THE FLEXIBLE HOSE SUPPLIED WITH
STANDARD KIT. THE USE OF ANY ACCESSORIES OR
TOOLING OTHER THAN THOSE RECOMMENDED IN
THIS MANUAL, MAY CAUSE DAMAGE OR INJURE THE
OPERATOR.
• THE FLUID CONTAINED IN THE FLEXIBLE HOSE CAN
BE VERY DANGEROUS. HANDLE THE FLEXIBLE HOSE
CAREFULLY. DO NOT PULL THE FLEXIBLE HOSE TO
MOVE THE EQUIPMENT. NEVER USE A DAMAGED OR
A REPAIRED FLEXIBLE HOSE.
Always check the product is compatible with
the materials composing the equipment (pump,
spray gun, flexible hose and accessories) with
which it can come into contact. Never use paints
or solvents containing Halogen Hydrocarbons (as
the Methylene Chloride).
If these products come into contact with aluminium
parts can provoke dangerous chemical reactions
with risk of corrosion and explosion.
IF THE PRODUCT TO BE USED IS TOXIC,
AVOID INHALATION AND CONTACT BY USING
PROTECTION GLOVES, GOGGLES AND PROPER
FACE SHIELDS.
TAKE PROPER SAFETY MEASURES FOR THE
PROTECTION OF HEARING IN CASE OF WORK
NEAR THE PLANT.
Electrical safety precautions
• Check the "ON/OFF" switch is on the "OFF" position before
connecting the cable to the mains.
• Never carry a plugged-in equipment.
• Disconnect the equipment before storing it and before
performing any maintenance operation or replacing of ac-
cessories.
• Do not carry the equipment neither unplug it by pulling the
electric cable.
Protect the cable from heat, oil and sharp edges.
• When the tool is used outdoors, use only an extension cable
suited for outdoor use and so marked.
• Take care when the pumping rod is moving.
Stop the machine whenever someone is within its vicinity.
• Repairs of the electrical equipment should only be carried
out by skilled personnel, otherwise considerabledanger to
the user may result.
Never attempt to tamper with the calibre of
instruments.
Make sure that the electrical system is earthed and
complies with regulations.

English
9
• The supply cable (F2) is provided without plug.
Use a plug which guarantees the plant earthing.
Only a technician or a skilled person should perform the
connection of the plug to the electric cable.
• Check the mains voltage corresponds to the equipment’s
rating (F1).
CONNECTION OF THE TOOLING TO THE POWER SUPPLY
• Check the ON/OFF switch (F3) is on the "OFF" position (0)
before connecting the cable to the mains.
Should anyone use an extension cable between
the tooling and the socket, it must have the same
characteristics as the cable supplied (minimum
diameter of the wire 2.5 mm2) with a maximum
length of 50 mt. Higher lengths and lower
diameters can provoke excessive voltage falls and
also an anomalous working of the equipment.
• Place the pressure control knob (F4) on the “MIN” position
(turn counterclockwise).
WASHING OF THE NEW EQUIPMENT
• The equipment has already been adjusted at our factory with
light mineral oil left inside the pumping group as protection.
Therefore, wash with diluent before sucking the product.
F1
F2
F3
F4
OFF
F3

English
10
• Ensure the gun (F6) is without nozzle.
• Open the re-circulation tap (F7).
• Rotate the pressure setting knob (F4) slightly clockwise so
that the machine operates at minimum power.
• Lift the suction pipe and dip it into the solvent tank (F5).
• Turn the unit ON-OFF switch (F3) on the "ON" position (I).
• Point the gun at a container (F8) keeping the trigger pressed
(so as to drain the oil inside) till a clean solvent comes out.
Now, release the trigger.
F5
Open
F3
ON
F4
F7
F6

English
11
• Remove the suction pipe and take away the solvent tank.
• Point the gun at the solvent tank and press the trigger so as
to recover the residual solvent.
• As the pump idles, press the ON/OFF switch (F3) on the
position "OFF" (0) to stop the tooling.
Absolutely avoid to spray solvents indoors. In
addition, it is recommended to keep away from
the pump in order to avoid the contact between
the solvent fumes and the electric motor.
• Insert the gun trigger lock and assemble the nozzle.
PREPARATION OF THE PAINT
• Make sure the product is suitable to be used with a spray
gun.
• Mix and filter the product before using it. For filtration, use
CLOSE-MESH (ref.214) and LARGE-MESH (ref.215) LA-
RIUS METEX braids.
Never use products containing halogen hydrocarbons (as
methylene chloride). If these products come into contact with
aluminium parts of the equipment, can provoke dangerous
chemical reactions with risk of explosion.
Make sure the product to be used is compatible
with the materials employed for manufacturing
the equipment (stainless steel and aluminium).
Because of that, please contact the supplier of
the product.
GWORKING
START OF THE PAINTING OPERATIONS
• Use the tooling after performing all the SETTING UP operations
above described.
• Dip the suction pipe (G1) into the product tank.
• Now the machine is ready. Should you use water paints,
besides the solvent wash, a wash with soapy and then clean
water is suggested.
OFF
F3
G1
F8

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12
• Open the re-circulation tap (G2).
• Press the ON/OFF switch of the equipment and turn a little
the pressure control knob (G3) clockwise, so as the machine
works at the idle speed.
• Make sure the product recycles from the return tube (G4).
• Close the re-circulation tap (G2).
• At this point the machine will continue to suck the paint
product until the delivery hose is completely full. Afterwards,
the product will re-circulate automatically.
SPRAY ADJUSTMENT
• Slowly turn clockwise the pressure control knob to reach the
pressure value in order to ensure a good atomization of the
product.
• An irregular and marked spray on the sides indicates a low
working pressure. On the contrary, a too high pressure causes
a high fog (“overspray”) and waste of product..
• In order to avoid overthickness of paint, let the gun advance
sideways (right-left) when spraying.
• Always paint with regular parallel bands coats.
• Keep a safety and constant distance between the gun and the
support to be painted and also keep yourselves perpendicular
to it.
G4
Open
G2
Closed
G2
G3

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13
NEVER point the spray gun at yourselves or at
other people. The contact with the casting can
use serious injuries. In case of injuries caused by
the gun casting, seek immediate medical advice
specifying the type of the product injected.
H
CLEANING AT THE END WORK
• Reduce pressure to the minimum (turn counterclockwise the
pressure control knob (H1) ).
• First release the residual pressure from the gun by holding
it pointed down towards the paint container, then open the
re-circulation tap (H3).
• Unscrew the gun nozzle (do not forget to clean it with sol-
vent).
• Turn the ON-OFF switch (H2) on the ON position and rotate
the pressure setting knob (H1) slightly clockwise.
• Make sure the solvent recycles the washing fluid from the
return tube (H4).
• Press the ON/OFF switch (H2) placed on the box of the
electric motor, to stop the equipment.
For the horizontal version, lift the suction hose and
replace the bucket containing the product with a
bucket of solvent (make sure it is compatible with
the product you are using).
H1
OFF
H2
H4
Open
H3

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14
• Point the gun (H5) at the product tank (H6) and, keeping the
trigger pressed, release the remaining product till a clean
solvent comes out. Now, release the trigger.
Follow the washing procedure before using again
the equipment.
• Lift again the suction pipe and remove the solvent tank.
• In case of long storage, we recommend you to suck and
to leave light mineral oil inside the pumping group and the
flexible hose.
Close the re-circulation tap (H5) . • Now point the gun at the solvent tank and press the trigger
so as to recover the residual solvent.
• As the pump starts idling, press the ON/OFF switch (H2)
su OFF (0) to stop the equipment.
OFF
H2
Close
H3
H5
H6

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15
OIL
IROUTINE MAINTENANCE
TOP UP HYDRAULIC OIL
With each start up, check the hydraulic oil level by looking through
the gauge (I1) on the side of the hydraulic body. If necessary, use
“AGIP OSO 46 type hydraulic oil” to top up the level.
RELEASE THE SUCTION VALVE
If the pump malfunctions, release the suction valve fitted on the
head of the pump in the following way:
• Remove the suction hose fitting (Mirò horizontal version) or
the suction tank (Mirò vertical version) and release the valve
by inserting a rigid rod (I2) with a diameter of no more than
15 mm.
To facilitate this operation add a few drops of oil.
CLEANING THE COMPRESSION VALVE
If the machine has problems with sucking up the liquid, disassemble
the compression valve (I3), and clean it with solvents that are
specifically for the type of paint being used.
Once it has been cleaned, shake the valve (I3) by hand to check
that the ball inside moves freely in its seating. If necessary,
clean again.
I1
I2
I3
I3
I3

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16
Check that the ball seals in its seating as follows:
• Turn the valve (I3) upside down;
• Once the valve (I3) is properly clean, fit it again.
• Put solvent into the groove in the ball’s seating;
• If the quantity of solvent a few minutes later is still identical
to that added previously, the ball’s seal in its seating is ensu-
red;
• If the solvent flows out the holes at the bottom within a few
minutes, replace this valve with a new one;
Solvent
I3
OK
NO
REPLACE
THE VALVE
I3 I3
Solvent

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17
OIL
REPLACING HYDRAULIC OIL
After operating for 100 hours, replace the oil in the pump;
• Discharge the waste oil through the plug (I4) fitted at the
bottom of the pump casing.
• Clean the seals on the cap and replace it if worn.
• Remove and clean the filter (I5) on the side of the pump
casing; if necessary, replace the filter and the respective
seals.
• Clean and, if necessary, replace the worn seals (I5).
• Replace the plug (I4).
• Fill the pump with the recommended oil until it reaches the
maximum level.
• Then, substitute the oil every 250 hours.
I5
I4
Plug
Filter

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18
Apparecchi per verniciatura
ATTENZIONE
UTILIZZARE GRUPPI ELETTROGENI
CON ALTERNATORE ASINCRONO
http: www.larius.com
Paint spraying units
WARNING
USE POWER UNITS WITH
ASYNCHRONOUS ALTERNATOR
e-mail [e-mail]
® ®
CLEANING THE MOTOR COOLING FAN GUARD
Clean the motor cooling fan protection guard (I6) and the finned
motor casing periodically to ensure the maximum cooling.
LWARNING PLATE
I6