Delfin MISTRAL 352 DS Installation instructions

Read this manual carefully before using the vacuum cleaner
Delfin srl
Strada della Merla, 49/a
10036 Settimo Torinese (TO) Italy
Tel. [phone]
Fax [phone]
www.delfinvacuums.it
[email protected]
MISTRAL industrial vacuum
cleaners
Operator's and maintenance
manual

Introduction
© Copryright DELFIN srl
ESSEDI Technical Manuals – Torino (ITALY)
http://www.essedimanuali.it
Edition November 2002
This manual provides all the information needed to use and service your vacuum cleaner. Good
operation and durability depend on proper maintenance and careful use.
Before leaving the factory, this particular model has undergone stringent tests to ensure utmost
reliability. Always check however to make sure the vacuum cleaner has not been damaged during
transport in such a way as to affect operation and safety.
This manual should be considered an integral part of the vacuum cleaner and must be kept
together with the unit until this is scrapped.
In case of loss of or damage to the manual, ask DELFIN for a new copy.
The technical details contained in this manual are the property of DELFIN and should be deemed
of a confidential nature.
Even partial reproduction of the graphic project, the text and the illustrations is legally forbidden.
Some details shown in the illustrations in this manual may be different from those of your vacuum
cleaner. Some component parts may have been removed for greater clarity.
For easier reference, this manual is split into sections, identifiable by specific graphic symbols.
The subjects dealt with in this manual are those expressly required by "Machine Directive EEC
98/37" and the technical details shown are those provided by the manufacturer at the time of
compilation.
This manual must be kept in a place accessible to all the personnel charged with operating and
servicing the vacuum cleaner.
In case of any doubts, always immediately phone the After-Sales Service.
The competent Law Court for all disputes is that of TURIN (Italy).
This manual must be kept with the vacuum cleaner in case of resale!

Contents
Information section 1
1.1 Identification of main parts 2
1.2 Accessories provided 3
1.2.1 Optional accessories 4
1.3 Identification details of manufacturer 7
1.4 Marking plate 7
1.5 Intended uses 8
1.6 Allowed environmental conditions 8
1.7Noiselevels 8
1.8 Storage 8
1.9 Scrapping 8
1.10 Technical details 9
1.11 Warranty 10
Safety section 11
2.1 Safety details 12
2.2 Safety precautions 13
2.3 Safety plates and symbols 16
2.4 Outstanding risks 17
2.5 Applied directives 17
Installation section 19
3.1 Handling 20
3.2Installation 21
Operation section 23
4.1 Description of controls 24
4.2Workcycle 25
4.3 Releasing and removing the removable container 27
4.4 Using the filter shaking system 28
Maintenance section 29
5.1 Informative notes 30
5.2 General safety precautions 30
5.3 Maintenance operations 31
5.4 Replacing the filters 32
5.5 Troubleshooting 34
Spare parts section 35

1
INFORMATION SECTION

2
1.1 Identification of main parts
Models 352 DS
1) Push handle
2) Controls
3) Motor protection cover
4) Power cable with plug
5) Vacuumed material container side release levers
6) Suction pipe coupling point
7) Filter shaking lever
8) Removable vacuumed material container
9) Removable container handle
10) Fixed castors
11) Castors

Information section
3
1.2 Accessories provided
1) Flat aluminium mouthpiece Ø 50 (code AA1045)
2) Flex. PVC hose, 2.5 m with couplings Ø 50 (code AA2591)
3) Hand Brush 517 Ø 50 (code AA2592)
4) New iron reduction unit Ø 80/50 (code AA2638)
5) 16-pocket polyester filter kit cat. G (code AR 3708)

4
1.2.1 Optional accessories
Absolute filter (Code art. AA 2627)
The absolute filter permits trapping the finest dust particles which have not been trapped by
the primary polyester filter.
If the vacuum cleaner features this specific filter, its filtering capacity will have to be
periodically checked.
Important!________________________________________________________________
During these operations, wear individual protection devices such as gloves,
protective eyewear and dust mask.
To change the filter, switch off the vacuum cleaner and remove the plug from the power
socket, release and remove the upper cap and then loosen nut (A).
Remove the absolute filter, place it in a plastic bag, close this and dispose of it according to
applicable laws for the type of vacuumed dust.
Besides the absolute filter, depending on the dust to be vacuumed, the following filters are
available:
- ANTISTATIC FILTER
For electrostatic dusts
- NOMEX FILTER
For hot dusts up to 240°
- POLYESTER FILTER CAT. C
For very fine dusts
The polyester filters are BIA institute certified.

Information section
5
Removable cyclone (Code AA 2658)
The cyclone is a treated steel cone that separates the filtering chamber from the container.
This is positioned above the vacuum inlet and below the filter.
Its job is to protect the filter from hot or sharp solid bodies and nebulised liquids.
Bag retention ring (Code AA 2655)
This optional can be requested when the vacuumed material is to be collected in a
disposable nylon bag fitted in the container. It allows keeping open the nylon bag, which is
subject to vacuum, for correct use.

6
WET-DRY fixed accessory (Code AA 1134)
The bracket of the WET-DRY accessory must be secured to the vacuum cleaner frame by
means of the special front setting (A).

Information section
7
1.3 Identification details of manufacturer
Delfin srl
Strada della Merla, 49/a
10036 Settimo Torinese (TO) - Italy
Tel. [phone]
Fax. [phone]
www.delfinvacuums.it
[email protected]
1.4 Marking plate
In compliance with the Machine Directive on vacuum cleaners, the machine is fitted with CE
plates.
When contacting the manufacturer or dealer, always quote the details shown on the
vacuum cleaner plate.

1.5 Intended uses
These specific vacuum cleaner models have been designed, built and protected for
vacuuming dusts and solid materials only, using special filters.
Important! __________________________________________________________
Always use specific filters for the type of dust or materials to be vacuumed.
Any other use is considered IMPROPER.
The vacuum cleaner is in any case intended for professional industrial use.
1.6 Allowed environmental conditions
To ensure the correct operation of the vacuum cleaner, this must be positioned protected
against atmospheric agents (rain, hail, snow, fog, dusts in suspension, etc.) with an
environmental running temperature between 5°C and 45°C and relative humidity not above
70%.
The work environment must be clean, well-enough lit and devoid of explosive atmosphere.
1.7 Noise level
Noise level readings were taken in accordance with the provisions of UNI 7712 standards.
Sound tests performed on this specific vacuum cleaner model show an acoustic pressure of
70 dB (A)
Important!
Pursuant to articles L.D. 277/91, workers exposed to sound pressure levels above 85
dBA must be protected by special individual protection devices.
It is therefore necessary, if such working conditions exist, to provide workers with
such approved individual protection devices and to inform them of the risks relating
to noise exposure.
1.8 Storage
Remove the filter and clean it, empty the container and store the vacuum cleaner in a place
protected against atmospheric agents with a temperature between 0°C and 40°C. Cover
with a nylon sheet to prevent accumulation of dust.
1.9 Scrapping
In case of scrapping, all the component parts of the vacuum cleaner will have to be
disposed of through adequate disposal channels in accordance with applicable legislation.
Before scrapping, all plastic and rubber parts will have to be separated from the electrical
material.
Parts made of plastic, aluminium and steel only may be recycled if collected by special
centres.

Information section
9
1.10 Technical details
352 DS
Use Dust
Voltage 230/50/60 V
By-pass motors 2
Power 2,300 W
Max. air flow 360 m3/h
Depression 2.500 mm. H2O
Filtering surface 20,000 cm2
Filter load 180 M3/M2/H
Noise level 70 db
Capacity 35 litres
Vacuum diameter Ø 80 mm
Overall dimensions 50 x 60 cm
Height 127 cm
Weight 40 kg

10
1.11 Warranty
Delfin guarantees this vacuum cleaner model for a period of 24 months from the date of
purchase indicated on the tax document at the time of delivery of the vacuum cleaner by
the seller.
The warranty shall be invalidated in the event of the vacuum cleaner having been repaired
by unauthorised third parties or of equipment or accessories being used that have not been
supplied by Delfin or which have not been recommended or approved by Delfin or whose
serial number has been removed or altered during the warranty period.
Delfin undertakes to repair or replace, free of charge, those parts which, during the
warranty period show manufacturing faults. Repairs shall be made in the Delfin facilities
only or in a Technical Assistance Centre indicated by us and machines shall be sent to us
carriage free (transport costs to be paid by the user, unless otherwise agreed).
The warranty does not cover any cleaning of working parts.
Faults not directly attributable to materials or manufacture shall be examined only in our
facility or in a Technical Assistance Centre indicated by us. If claims appear unjustified, all
the costs relating to repair and/or replacement of parts shall be charged to the buyer.
The purchase tax document shall be shown to the technical personnel making the repairs
and must accompany the vacuum cleaner dispatched for repair.
The warranty does not cover: accidental damage, caused by transport or carelessness or
inadequate treatment, or improper use not in compliance with the instructions in the
instruction manual, or in any case by occurrences not dependent on normal operation or
use of the vacuum cleaner. Delfin declines all responsibility for any damage to persons or
things caused by bad or improper use of the vacuum cleaner.
All disputes shall be referred to the Law Court of Turin (Italy).
The manufacturer declines all liability in the following cases:
•Failure to send the warranty Certificate
•Failure to follow the instructions
•Use of non-original spare parts
•Failure to service the machine properly

11
SAFETY SECTION

12
2.1 Safety details
The person in charge of safety shall be responsible for informing workers about the risks
associated with vacuum cleaner operation.
The obligation also exists of training workers so they are able to protect themselves and
others.
Failure to observe basic safety regulations and precautions could cause accidents during
vacuum cleaner operation, maintenance and repair. Accidents can often be avoided by
recognising potentially dangerous situations before these occur. Operators should be aware
of potential hazards and be trained and skilled enough. They should also have the tools
necessary to perform these duties properly.
Delfin shall under no circumstances be deemed liable for accidents or damage caused by
use of the vacuum cleaner by personnel not properly trained or who use it in an improper
manner, as well as by even partial failure to comply with the safety regulations and
intervention procedures indicated in this manual.
The safety precautions and warning notices are indicated in this manual and on the
product.
Unless these hazard messages are heeded, the operator could become involved in
accidents with serious consequences for him/herself and for other people.
The safety messages are highlighted by the following symbols:
Important!
Unless these messages are heeded, operator injuries could occur.
Warning!
Unless these messages are heeded, vacuum cleaner damage could occur.
Delfin cannot foresee all possible circumstances capable of representing a potential hazard.
The warnings in this manual and on the products should not therefore be deemed
exhaustive.
In the event of tools, procedures, work or machining methods being used that are not
explicitly recommended by Delfin, make sure no hazards exist for operators and others.
Only ever use original DELFIN spare parts
Delfin declines all liability in the event of
non-original spare parts being used.

Safety section
13
2.2 Safety precautions
Important!
The following indications are, by themselves, not enough to fully protect against all
the hazards that could arise during vacuum cleaner operation. These will have to be
integrated with common sense and the experience of the operator, both of which are
crucial factors for preventing accidents.
Each section of this manual lists further specific safety precautions for the various
operations.
Maintenance jobs must always be performed with the power plug detached from the
power point.
The employer must inform and train the user according to the provisions of applicable laws.
Before using the machine, prepare and train yourself by reading this manual carefully. Use
of the machine by untrained and unauthorised persons is forbidden.
Using the machine to vacuum toxic substances is forbidden unless this has been equipped
with special filters required for the specific type of dusts. Such filters must be explicitly
requested by you.
Do not vacuum flammable materials or substances or which could cause explosions (fuels,
solvents, etc.). To vacuum such materials, the machine must be built with Anti-explosion
Motor and Electric System and this must be requested by you explicitly.
Do not vacuum corrosive substances unless the machine is equipped with containers
suitable for this purpose (Stainless-steel AISI 304).
Use of the machine without the supplied filters is not recommended.
If the filters are correctly fitted, the machine will not eject any objects.
If the machine is used to vacuum toxic-harmful substances, the container must be emptied
and the filters cleaned using adequate individual protection devices, selected according to
the type of substances to be vacuumed.
Never rest miscellaneous materials on the horizontal protection guard.
The machine casing containing moving parts must not be removed by the user.
When using the machine, mind other people, especially children.
Use the machine cautiously on slopes and ramps. Do not change direction on gradients.
Make sure the parked machine remains stable by operating the braked wheel.

14
During cleaning operations, maintenance jobs or when changing parts, the starter switch
must be off and the machine must be disconnected from the power mains by removing the
cable from the socket.
Only skilled persons should carry out repairs.
During use, mind the power supply cables and avoid crushing or pulling these.
Periodically check the mains power cable to ensure this is not damaged.
In the event of the cable being damaged, the machine must not be used.
In the event of the cable, plugs or couplings being replaced, make sure these are protected
against water spray and check mechanical strength.
Never pull the machine by means of the power cable and the vacuum pipe.
Motor brushes and burnt-out fuses must be replaced by DELFIN or authorised dealers.
Always use original spare parts.
The user is responsible for disposing of vacuumed substances in accordance with
applicable laws.
After 10 years of use, we recommend sending the machine for a complete overhaul to
DELFIN srl.
The machine is supplied with: instruction manual, Exploded Spare Parts drawing, Test
Sheet, Warranty Slip, Approval Certificate.
All DELFIN products are covered by an Insurance Warranty for "Civil liability towards third
products" amounting to € 516,500.00 with the RAS Spa insurance company.
In the event of Customers fitting a tool to the machine not supplied by DELFIN , make sure
the safety conditions required by Machine Directive 98/37 EEC are complied with and in
any event, DELFIN is unable to accept liability for any problems arising from use of such
tool.
The vacuum cleaner must not be operated in a corrosive or explosive environment.
Always make sure the vacuum cleaner is free of all foreign materials such as debris, oil,
equipment and other objects that could affect operation and cause injury to persons.
Avoid using flammable or toxic solvents such as petrol, benzene, ether and alcohol for
cleaning.
Avoid prolonged contact with solvents and inhaling their vapours. Avoid use close to open
flames or sources of heat.
Never use the vacuum cleaner without the filter.

Safety section
15
Do not vacuum lit cigarette ends. The filter could be damaged.
Do not vacuum petrol or flammable liquids in general.
Make sure all the guards and protection devices are in place and that all the safety devices
are in place and working properly.
Do not wear loose or hanging clothing such as ties, scarves or torn garments that could
become trapped and be sucked up by the cleaner.
Do not open the vacuum container with the machine running.
The manual should always be kept handy for reference so the operating cycle can be
checked every time there are doubts.
In the event of this manual being lost or damaged, ask DELFIN for a new copy.
Structural damage and improper alterations or repairs could change the protection capacity
of the vacuum cleaner and therefore cancel this certification.
Any alterations to the appliance must only be made by Delfin engineers.
During maintenance jobs, affix a notice to the appliance indicating "MACHINE BEING
SERVICED, DO NOT START".
Climbing on the cleaner is forbidden.
Never touch electric wires, switches, buttons, etc. with wet hands.
Before connecting to the power mains, make sure the power voltage and frequency are
those shown on the machine plate.
Make power connections to a mains supply with efficient earth system.
In the event of an extension being used, make sure this is in perfect condition, marked CE
and that the cross section of the cable is suitable for the vacuum cleaner power input.
When restoring original working conditions, the appointed personnel should make sure that
at the end of the operating procedure, proper vacuum cleaner operation safety conditions
are restored, especially the safety devices and the protective guards.
Only adult persons should use the vacuum cleaner.
During vacuuming operations, always brake the vacuum cleaner using the special revolving
wheel lock.

16
2.3 Safety plates and symbols
Plates are affixed to the vacuum cleaner showing safety symbols and/or messages.
Important!
Make sure all the safety messages are legible.
Clean these with a cloth, soap and water. Do not use solvents, diesel fuel or petrol.
Replace the damaged plates with new ones supplied by Delfin.
If a plate is affixed to a replaced part, make sure a new plate is affixed to the new
part.
Important! _____________________
Risk of crushing upper limbs while fitting and locking the material container on the
vacuum cleaner.
Never place hands between the material container and vacuum cleaner while locking.
Do not place hands on sides of container near the guide pins while locking.
Perform the container locking operation by means of the levers located on the side,
USING BOTH HANDS!!
Important!
Read the operator's and
maintenance manual carefully
before using the cleaner or doing
any maintenance jobs.

Safety section
17
2.4 Outstanding risks
Careful analysis of risks performed by the manufacturer and stored in the technical file has
made it possible to eliminate most of the risks associated with vacuum cleaner operation.
The manufacturer advises carefully following the instructions, procedures and advice
contained in this manual as well as applicable safety regulations, including the use of the
envisaged protection devices, both those integrated in the cleaner and individual.
Outstanding risks associated with the vacuum cleaner could be:
Electrical maintenance risks caused by the need to work under power.
Pursuant to Presidential Decree 547/55, only trained personnel should work on the machine
with the power supply connected and this must have double earth insulation.
Risk of improper use in the presence of explosive and flammable substances.
The vacuum cleaner must not be used in environments containing substances in the form
of liquids that could vaporise at room temperature and flammable dusts and gas.
Risks of operation in humid environments
Keep to the limits shown in this manual at chap. 1.5 Allowed environmental conditions.
Risk of erroneous interpretation of the safety pictograms
Having identified the various outstanding risks, the manufacturer has affixed to the cleaner
a number of hazard labels in compliance with regulations relating to the graphic symbols to
be used.
The user must immediately replace any safety plates that become illegible due to wear or
damage.
Important!
Removing the safety plates on the vacuum cleaner is strictly forbidden.
The manufacturer declines all liability in relation to vacuum cleaner safety in the
event of failure to comply with the above indications.
2.5 Applied directives
The following directives apply to the vacuum cleaner described in this manual:
•98/37 EEC Machine directive
•89/336 EEC Electromagnetic compatibility directive
•73/23 EEC Low-voltage directive