Piusi EX50 12V dc Quick start guide

Bulletin M0217E ML _ 01
Installaltion, use and maintenance EN
Installazione uso e manutenzione IT
EX50EX75
12V
Installation, Gebrauch und Wartung DE
Installation, utilisation et maintenance FR
Manual de utilização e manutenção PT
Manual para el uso el mantenimiento ES
Монтаж, эксплуатация и техническое обслуживание RU
Betjenings-Ogvedligeholdelses-manual DA

M0217E
18 /132
Installation, use and maintenance
Bulletin M0217E
ENGLISH
1 MACHINE AND MANUFACTURER IDENTIFICATION 19
2 CONFORMITY 20
3 MACHINE DESCRIPTION 20
3.1 DEFINITION OF CLASSIFIED ZONES 20
3.2 INTENDED USE 21
3.3 HANDLING AND TRANSPORT 21
4 GENERAL WARNINGS 22
5 FIRST AID RULES 23
6 GENERAL SAFETY RULES 23
7 TECHNICAL DATA 24
7.1 PERFORMANCE SPECIFICATIONS 24
8 ELECTRICAL DATA 25
9 OPERATING CONDITIONS 26
9.1 ENVIRONMENTAL CONDITIONS 26
9.2 ELECTRICAL POWER SUPPLY 26
9.3 DUTY CYCLE 26
9.4 FLUIDS PERMITTED 26
10 INSTALLATION 27
10.1 POSITIONING, CONFIGURATIONS AND
ACCESSORIES 27
10.2 NOTES ON SUCTION AND DELIVERY LINES 28
11 CONNECTIONS 29
11.1 ELECTRICAL CONNECTIONS 29
11.2 PIPING CONNECTIONS 30
12 INITIAL START-UP 30
13 EVERY DAY USE 31
14 MAINTENANCE 31
15 NOISE LEVEL 32
16 PROBLEMS AND SOLUTIONS 32
17 DEMOLITION AND DISPOSAL 33
18 EXPLODED VIEWS 127
TABLE OF CONTENTS

19/124
19 /132
This manual belongs to PIUSI S.p.A. Whole or partial reproduction of this manual is forbidden.
EN
EN (Translation of the original language) EX50 - EX75 12V
1 MACHINE AND MANUFACTURER IDENTIFICATION
EX50
CAUTION: Automatic thermal protected motor - don’t open when energized
Date
L.N.
Insulation Class F
12 V dc 17 A 1/8 HP
Duty min. 30 ON 60 OFF
Ex db h IIB T4 Gb
T.amb. -10° / +40°C
Suzzara (MN)
Italy
0948 II 2 G
CESI 12 ATEX 033X
2700 RPM
IECEX CES 12.0016X
ELECTRIC FUEL PUMP
TYPE EX50 12V
Q.max 52 l/m - P.max 1,1 bar
EX75
CAUTION: Automatic thermal protected motor - don’t open when energized
Date
L.N.
Insulation Class F
12 V dc 20 A 1/4 HP
Duty min. 30 ON 30 OFF
Ex db h IIB T4 Gb
T.amb. -10° / +40°C
Suzzara (MN)
Italy
0948 II 2 G
CESI 12 ATEX 033X
2700 RPM
IECEX CES 12.0016X
ELECTRIC FUEL PUMP
TYPE EX75 12V
Q.max 75 l/m - P.max 1,1 bar
AVAILABLE MODELS: Ex50 12V dc
Ex75 12V dc
MANUFACTURER: PIUSI S.p.A. ,
Via Pacinoi 16/A – z.i. Rangavino
46029 Suzzara - (MN) - Italy
THE PUMPS COMPLIES WITH THE FOLLOWING MARKING ATEX/IECEX
II GROUP Group II comprises appliances intended for use in other environments
(other than mining) in which explosive atmospheres are probable.
2CATEGORY High protection, Category 2 for AREA 1 GAS and AREA 2 GAS
G
TYPE OF EXPLO-
SIVE ATMO-
SPHERE
Gas
Ex PERMANENT
PREFIX Explosion-proof equipment certified according to the European ATEX
directives
db
PROTECTION
METHOD
Explosion-proof cases (EN 60079-1)
h
PROTECTION
METHOD Protection from non-electric ignition sources (EN 80079-36 and 37)
IIB GAS
CLASS Electrical appliances for potentially explosive environments other than
mining. ( ethyilene )
T4 TEMPERATURE
CLASS The temperature of the pump will not exceed 135°C
Gb EQUIPMENT
PROTECTION
LEVEL
Equipment for explosive gas atmospheres, haviong a “heigh” level pro-
tection, which is not a source of ignition in normal operation or during
expected malfunctions

M0217E
20 /132
Installation, use and maintenance
2 CONFORMITY
WARNING SEE “DECLARATION OF CONFORMITY” SHEET
3 MACHINE DESCRIPTION
PUMP Self-priming, volumetric, rotating electric vane pump, equipped with by-pass
valve.
MOTOR Brush motor powered by continuous current, low voltage, with intermittent
cycle, closed type, ip55 protection class according to cei en 60034-5, flange-
mounted directly to the pump body.
WARNING MOTOR EQUIPPED WITH AUTOMATIC THERMAL OVERLOAD PROTEC-
TION. SHOULD THE PROTECTION ACTIVATE, TURN OFF THE PUMP
AND WAIT FOR IT TO COOL DOWN.
3.1 DEFINITION OF CLASSIFIED ZONES
FOREWORD Definition of zones as shown in directive 99/92/CE
ZONE 0 Place where an explosive atmosphere made up of a mix of air and inflammable sub-
stances in the form of gas, vapour or mist is continuously present, either for long periods
or frequently.
Note: Generally speaking, said conditions, when they occur, involve the inside of tanks,
pipes and containers, etc.
ZONE 1
Place where it is probable that an explosive atmosphere, made up of a mix of air and
inflammable substances in the form of gas, vapour or mist, can occur occasionally during
normal operation.
Note: Said zone can also include:
- places in the immediate vicinity of zone 0;
- places in the immediate vicinity of supply openings;
- places in the immediate vicinity of filling and and emptying openings;
- places in the immediate vicinity of appliances, protection systems and fragile glass and ceramic compo-
nents, or components made of other similar materials;
- places in the immediate vicinity of inadequately sealed stuffing boxes, e.g., on pumps
and valves with stuffing box.
ZONE 2 Place where it is improbable that an explosive atmosphere, made up of a mix of air and
inflammable substances in the form of gas, vapour or mist, can occur during normal
operation, but which, if it does occurs, only persists for a short time.
Note: Said zone can include, among others, places surrounding the zones 0 or 1.
ZONE 20 Place where an explosive atmosphere in the form of a cloud of combustible powders in
the air is continuously present, either for long periods or frequently.
Note: Generally speaking, said conditions, when they occur, involve the inside of tanks,
pipes and containers, etc.
ZONE 21 Place where it is probable that an explosive atmosphere, in the form of a cloud of combustible powders in
the air, can occur occasionally during normal operation.
Note: Said zone can include, for example, among others, places in the immediate vicinity of powder
loading and emptying points and places where powder layers form or which, during normal opera-
tion, could produce an explosive concentration of combustible powders mixed with the air.

21/124
21 /132
This manual belongs to PIUSI S.p.A. Whole or partial reproduction of this manual is forbidden.
EN
EN (Translation of the original language) EX50 - EX75 12V
ZONE 22 Place where it is improbable that an explosive atmosphere, in the form of a cloud of
combustible powders in the air, occur during normal operation but which, if it does oc-
cur, only persists for a short time.
Note: This zone can comprise, among others, places near appliances, protections sys-
tems and components containing powder, out of which the powder can come out due to
leaks with the formation of powder deposits (e.g., milling salt, where the powder comes
out of the mills and deposits).
ZONE 1 ZONE 0
ZONE 20
ZONE
2
ZONE 21
3.2 INTENDED USE
INTENDED
USE PUMP FOR TRANFERRING FUEL SUITABLE FOR OPERATING IN ZONES
CLASSIFIED“1”AND “2”, ACCORDING TO DIRECTIVE 99/92/CE
THE DETERMINATION OF THE AREAS (ZONES) IS TO BE CARRIED OUT
BY THE USER
FORBIDDEN
USE Using the appliance for fluids other than those listed at paragraph “Fluids per-
mitted” and for uses other than those described at the item “authorised use”
is forbidden.
PLANT OPERATION RESTRICTIONS IT IS FORBIDDEN:
1
To use the appliance in a construction configuration other than that contem-
plated by the manufacturer
2
To use the appliance with fixed guards tampered with or removed.
3
To use the appliance in places where there is risk of explosion and/or fires clas-
sified in the following zones: 0; 20; 21; 22
4
To integrate other systems and/or equipment not considered by the manufac-
turer in the executive project.
5
To connect the appliance up to energy sources other than those contemplated
by the manufacturer
6
To use the commercial devices for purposes other than those indicated by the
manufacturer.
7
To use in case of lightnings
3.3 HANDLING AND TRANSPORT
Due to the limited weight and dimensions of the pumps, special lifting equipment is not required to
handle them. The pumps are carefully packed before dispatch. Check the packing when receiving the
material and store in a dry place.

M0217E
22 /132
Installation, use and maintenance
4 GENERAL WARNINGS
Important
precautions To ensure operator safety and to protect the pump from potential damage, workers must be fully acquainted with this instruction manual before perform-
ing any operation.
Symbols used
in the manual
The following symbols will be used throughout the manual to highlight safety information and
precautions of particular importance:
WARNING
WARNING indicates a hazardous situation which, if not avoided, could re-
sult in death or serious injury
NOTICE NOTICE is used to address pratices not related to personal injury
Manual pres-
ervation This manual should be complete and legible throughout. It should remain avail- able to end users and specialist installation and maintenance technicians for
consultation at any time.
Reproduction
rights
This manual belongs to Piusi S.p.A., which is the sole proprietor of all rights indicated by ap-
plicable laws, including, by way of example, laws on copyrights. All the rights deriving from
such laws are reserved to Piusi S.p.A.: the reproduction, including partial, of this manual, its
publication, change, transcription and notication to the public, transmission, including us-
ing remote communication media, placing at disposal of the public, distribution, marketing
in any form, translation and/or processing, loan and any other activity reserved by the law to
Piusi S.p.A..
NOTICE THIS MANUAL IS VALID ONLY FOR AC PUMPS
ALWAYS USE THE RIGHT VOLTAGES TO CONNECT THE PUMPS
WARNING BEFORE PROCEEDING WITH THE REFUELLING OF THE AIRCRAFT,
ENSURE THAT THE SYSTEM INTENDED FOR SUCH ACTION COMPLIES
WITH THE REGULATIONS IN FORCE IN THE COUNTRY OF USE
WARNING USE THE PUMP ONLY WITH FLUIDS PERMITTED.
DO NOT USE WITH FLUIDS NOT PERMITTED TO AVOID DAMAGING THE
PUMP. THE GUARANTEE LAPSES IN CASE OF MISUSE OF THE FLUID.
DO NOT USE THE PUMP WITH LIQUID FOOD PRODUCTS AND/OR WA-
TER-BASED FLUIDS.
DO NOT OPERATE THE PUMP DRY TO AVOID DAMAGE.
Before connection, make sure that the piping and the suction tank are free
of dirt and solid residue that could damage the pump and its accessories.
NEVER COLLECT THE FLUID FROM THE BOTTOM OF THE TANK SINCE
IT MAY CONTAIN IMPURITIES
Keep a working fire extinguisher in the work area.
Do not operate the unit when fatigued or under the influence of drugs or
alcohol.
Do not alter or modify equipment. Alterations or modifications may void
agency approvals and create safety hazards.
Keep children and animals away from work area.
Comply with all applicable safety regulations.
Do not use in case of lightnings
BEFORE USING THE PUMP SWITCH OFF ALL THE ELECTRONIC DEVIC-
ES ( I.E. MOBILE PHONES, BEEPERS ETC.)

23/124
23 /132
This manual belongs to PIUSI S.p.A. Whole or partial reproduction of this manual is forbidden.
EN
EN (Translation of the original language) EX50 - EX75 12V
5 FIRST AID RULES
Contact with
the product
In the event of problems developing following EYE/SKIN CONTACT, INHALA-
TION or INGESTION of the treated product, please refer to the SAFETY
DATA SHEET of the fluid handled.
Persons who
have suered
electric shock
Disconnect the power source, or use a dry insulator to protect yourself while you move
the injured person away from any electrical conductor. Avoid touching the injured per-
son with your bare hands until he is far away from any conductor. Immediately call for
help from qualified and trained personnel. Do not operate switches with wet hands.
NOTICE Please refer to the safety data sheet for the product
SMOKING
PROHIBITED DO NOT SMOKE NEAR THE PUMP AND DO NOT USE THE PUMP NEAR FLAMES.
6 GENERAL SAFETY RULES
USER'S
RESPONSI-
BILITY
IT IS ESSENTIAL TO GET TO KNOW AND UNDERSTAND THE INFORMA-
TION CONTAINED IN THIS MANUAL.
IT IS ESSENTIAL TO GET TO KNOW AND OBSERVE THE SAFETY SPECIFICA-
TIONS FOR FLAMMABLE LIQUIDS.
BEFORE USING THE PUMP IT’S IMPORTANT TO TRAIN OPERATORS, INSTALLERS
AND MAINTENANCE STAFF TO LET THEM WORK IN A PARTICULAR AREA NO. 1
AS MENTIONED BY DIRECTIVE 94/9/EC
Essential
protective
equipment
character-
istics
I n case of contact with the product and for good standard of behaviour, wear protec-
tive equipment which is:
• Suited to the operations that need to be performed;
• Resistant to products used
To do so, please refer to the relevant techcnical datasheets of the fluid used.
Personal
protective
equipment
that must be
worn
safety shoes close-fitting clothing
protection
gloves safety goggles
Necessary
safety
devices instructions manual
Protective
gloves Prolonged contact with the treated product may cause skin irritation; always wear protective gloves during dispensing.
NOTICE TO PREVENT ELECTRIC SHOCK AND DETONATION OF SPARKS, ALL PUMPING SYS-
TEM MUST HAVE PROPER GROUNDING, INCLUDING TANK AND ANY ACCESSORIES.
WARNING
ENFORCE REGULATIONS FOR ELECTRICAL INSTALLATION
ALL WIRING AND ELECTRICAL CONNECTIONS MUST BE PERFORMED
BY AUTHORIZED AND SUITABLY TRAINED PERSONNEL.
Never touch the electric plug or socket with wet hands.
Do not switch the dispensing system on if the network connection cable
or important parts of the apparatus are damaged, such as the inlet/outlet
pipe, nozzle or safety devices. Replace the damaged pipe immediately.

M0217E
24 /132
Installation, use and maintenance
WARNING The electrical connection between the plug and socket must be kept well
away from water.
THE PUMP IS EQUIPPED WITH CURRENT-SENSING PROTECTION. IF IT ACTIVATES TURN
OFF THE PUMP IMMEDIATELY.
WARNING THE PUMP IS EQUIPPED WITH PROTECTION AGAINST OVERHEATING AND OVER-
LOAD RISKS. SHOULD SUCH DEVICES ACTIVATE, THE PUMP SHUTS DOWN AUTO-
MATICALLY, BUT THE MASTER SWITCH IS NOT TURNED OFF. IT IS IMPORTANT TO
STOP THE PUMP USING ITS SWITCH. THE PUMP RESTARTS AFTER ITS NORMAL OP-
ERATING CONDITIONS HAVE BEEN RESTORED.
WARNING FAILURE TO OBSERVE THE ABOVE MENTIONED RULES CAN CAUSE SE-
RIOUS ACCIDENTS
SHOULDTHE HEAT SENSOR ACTIVATE UNDER NORMALUSE CONDITIONS,PLEASE CON-
TACT THE TECHNICAL SUPPORT.
7 TECHNICAL DATA
7.1 PERFORMANCE SPECIFICATIONS
The performance diagram shows flow rate as a function of back pressure.
EX
Absorption (A)
Flow Rate
(l/min) - (gpm)
Back Pressure
(bar) - (psi)
Typical delivery
configuration
4 mt of 3/4” hose Auto- matic dispens- ing nozzle
Functioning Point
A - (Maximum Flow
Rate) 15 57 - 15 0,2 - 3
B - (Base system) 17 40 - 10,5 0,5 - 7 • •
C - (By-Pass) 25 0 1,1 - 16 Delivery Closed
EX
Absorption (A)
Flow Rate
(l/min) - (gpm)
Back Pressure
(bar) - (psi)
Typical delivery
configuration
4 mt of 1” hose Auto- matic dispens- ing nozzle
Functioning Point
A - (Maximum Flow
Rate) 15 75 - 20 0,2 - 3
B - (Base system) 20 65 - 17 0,7 - 10 • •
C - (By-Pass) 26 0 1,1 - 17.5 Delivery Closed

25/124
25 /132
This manual belongs to PIUSI S.p.A. Whole or partial reproduction of this manual is forbidden.
EN
EN (Translation of the original language) EX50 - EX75 12V
X
Y
AB
C
0P (bar)
ATTENTION The curve refers to the following operating conditions:
Fluid: PETROL,
Temperature: 20° C
Suction conditions: The pipe and the pump position relative to the fluid
level is such that a low pressure of 0.3 bar is generated at the nominal
flow rate.
Under different suction conditions higher low pressure values can be created that reduce
the flow rate compared to the same back pressure values. To obtain the best performance,
it is very important to reduce loss of suction pressure as much as possible by following these
instructions:
• shorten the suction pipe as much as possible
• avoid useless elbows or throttling in the pipes
• keep the suction filter clean
• use a pipe with a diameter equal to, or greater than, indicated (see Instal-
lation).
8 ELECTRICAL DATA
PUMP MODEL POWER SUPPLY CURRENT
Voltage (V) Frequency (Hz) Max (*) (A)
EX50 12 DC 25
EX75 12 DC 26
(*) Refers to functioning in by-pass mode.
POWER CORD INPUT 1/2" NPT
USE CABLE GLANDS WITH PROTECTION GRADE Ex-d
POWER CORD EX50 Minimum section recommended for cables up to 6 m:
2.5 MM^2 or 12 AWG.
Recommended sheath: H07RN-F T90°; SJT T90°; AWM Syle 21179 T80°
POWER CORD EX75 Minimum section recommended for cables up to 6 m: 12 AWG.
Recommended sheath: H07RN-F T90°; SJT T90°; AWM Syle 21179 T80°
CABLE OF
EARTHING Section greater than or equal to the power cable

M0217E
26 /132
Installation, use and maintenance
9 OPERATING CONDITIONS
9.1 ENVIRONMENTAL CONDITIONS
AMBIENT
TEMPERA-
TURE
min. +14 °F / max +104 °F
min. -10 °C / max +40 °C
FLUID
TEMPERA-
TURE
min. +14 °F / max +104 °F
min. -10 °C / max +40 °C
RELATIVE
HUMIDITY max. 90%
WARNING The temperature limits shown apply to the pump components and must be
respected to avoid possible damage or malfunction.
9.2 ELECTRICAL POWER SUPPLY
NOTICE The pump must be powered by DC line, the nominal values of which are
indicated on the table in the paragraph "ELECTRICAL DATA".
The maximum acceptable variations from the electrical parameters are:
Voltage: +/- 5% of the nominal value
Frequency: +/- 2% of the nominal value
WARNING Power supply from lines with values that do not fall within the indicated
limits could cause damage to the ELECTRICAL AND electronic compo-
nents.
9.3 DUTY CYCLE
NOTICE The pumps EX50 have been designed for intermittent use and a duty
cycle of 30 min. ON and 60 min. OFF in conditions of maximum A. TEM-
PERATURE (40 °C) AND AT NOMINAL TRANSFER CONDITIONS.
NOTICE The pumps EX75have been designed for intermittent use and a duty
cycle of 30 min. ON and 30 min. OFF in conditions of maximum A. TEM-
PERATURE (40 °C) AND AT NOMINAL TRANSFER CONDITIONS.
WARNING Functioning under by-pass conditions is only allowed for short periods of
time (max. 3 minutes).
9.4 FLUIDS PERMITTED
WARNING THE PUMP CAN BE USED ONLY WITH THE FOLLOWING FLUIDS:
- DIESEL - KEROSENE
- PETROL - PETROL ALCOHOL MIXED MAX 15%
- AVGAS 100/100LL (pump only) - JET A / A1 (pump only) -
ASPEN2 /4

27/124
27 /132
This manual belongs to PIUSI S.p.A. Whole or partial reproduction of this manual is forbidden.
EN
EN (Translation of the original language) EX50 - EX75 12V
10 INSTALLATION
WARNING BEFORE ANY OPERATION, ENSURE TO BE OUT OF POTENTIALLY EX-
PLOSIVE AREAS
THE PUMP MUST NEVER BE OPERATED BEFORE THE DELIVERY AND
SUCTION LINES HAVE BEEN CONNECTED.
TIGHTEN THE ELECTRICAL BOX TO ENSURE PROTECTION AGAINST
THE RISK OF EXPLOSION
THE RIGHT CLAMPING SCREWS COUPLE THAT GRANTS THIS PRO-
TECTION IS 10Nm
IN THE EVENT OF LOSS, USE ONLY SCREWS OF RESISTANCE CLASS 8.8
OR HIGHER
PRELIMINARY
INSPECTION - Verify that all components are present. Request any missing parts from the manu- facturer.
- Check that the pump has not suffered any damage during transport or storage.
- Carefully clean the suction and delivery inlets and outlets, removing any dust or
other packaging material that may be present.
- Check that the electrical data corresponds to those indicated on the data plate.
- Always install in an illuminated area.
- Install the pump at a height of min. 80 cm.
WARNING IF VALVES IN THE CIRCUIT ARE TO BE INSTALLED, MAKE SURE THEY
ARE EQUIPPED WITH OVERPRESSURE SYSTEM.
CLEAN THE TANK AND MAKE SURE IT IS WELL-
VENTILATED (RECOMMENDED OPENING PRESSURE: 3 psi
APPLY THE QUICK COUPLING TO THE TANK CORRECTLY AND SAFELY
DO NOT BLOCK THE DRAINAGE HOLES (det. A exploded view page 127)
10.1 POSITIONING, CONFIGURATIONS AND ACCESSORIES
NOTICE The pump must be secured in a stable manner.
WARNING The pump is for fixed function.
It must be permanently fixed and protected from direct sunlight.
It is the installer’s responsibility to provide the line accessories necessary
for the safe and proper functioning of the pump. The accessories that are
not suitable to be used with the previously indicated material could dam-
age the pump and/or cause injury to persons, as well as causing pollution.
To maximise performance and prevent damage that could affect pump
operation, always demand original accessories.

M0217E
28 /132
Installation, use and maintenance
10.2 NOTES ON SUCTION AND DELIVERY LINES
DELIVERY
The selection of the pump model must be made taking into account the characteristics of the system.
The combination OF: the length of the pipe, the diameter of the pipe, as well as the accessories in-
stalled, could create back pressure that are greater than the maximum predicted pressure, thereby
causing the pump's electronic controls to intervene and reducing the dispensed flow considerably.
In these cases, to guarantee correct operation of the pump, it is necessary to reduce the resistance of
the system using pipes that are shorter or that have a greater diameter, as well as line accessories with
smaller resistances (e.g. an automatic dispensing nozzle with greater flow rate capacity).
SUCTION
Self-priming pumps are characterized by excellent suction capacity.
During the start-up phase, when the suction pipe is empty and the pump is wet with the fluid, the elec-
tric pump unit is able to suck liquid from a maximum vertical distance of 2m.
It is important to note that it could take up to 1 minute for the pump to prime and that the presence of
an automatic dispensing nozzle on the delivery side will prevent the air trapped during the installation
from being released and, therefore, the correct priming of the pump. For this reason, it is always advis-
able to prime the pump without an automatic delivery nozzle, verifying the proper wetting of the pump.
Always install a foot valve to prevent the suction pipe from being emptied and to keep the pump wet
at all times. In this way, the pump will always start up immediately the next times it is used. When the
system is in operation, the pump can operate with back pressures of up to 0.5 bars on the suction inlet;
beyond this point, the pump may begin to cavitate resulting in a drop of the flow rate and an increase
in the noise levels of the system.
In light of this, it is important to guarantee small back pressures on the suction side, by using short pipes
with diameters that are equal to or larger than those recommended, reducing bends to a minimum, and
using filters with a large cross-section and foot valves with minimum possible resistance on the suction
side. It is very important to keep the suction filters clean because, when they become clogged, they
increase the resistance of the system.
The vertical distance between the pump and the fluid must be kept as short as possible, and it must fall within
the 2m maximum required for priming. If the distance is greater, a foot valve must be installed to allow the
suction pipes to fill up and the diameter pipes must be larger. It is however recommended that pump not be
installed if the vertical distance is greater than 3m.
WARNING If the suction tank is higher than the pump, an anti-siphon valve should be
installed to prevent accidental diesel fuel leaks. Dimension the installa-
tion in order to control the back pressures due to water hammering
It is a good system practice to install vacuum and air pressure gauges
right at the inlets and outlets of the pump, which allow verification that
operating conditions are within anticipated limits. To prevent the suction
pipes from being emptied when the pump stops, a foot valve should be
installed.
THE INSTALLER IS RECOMMENDED TO INSTALL A SUCTION FILTER.

29/124
29 /132
This manual belongs to PIUSI S.p.A. Whole or partial reproduction of this manual is forbidden.
EN
EN (Translation of the original language) EX50 - EX75 12V
11 CONNECTIONS
11.1 ELECTRICAL CONNECTIONS
WARNING BEFORE ANY OPERATION, ENSURE TO BE OUT OF POTENTIALLY EX-
PLOSIVE AREAS
IT IS THE INSTALLER'S RESPONSIBILITY TO CARRY OUT THE ELECTRI-
CAL CONNECTIONS IN COMPLIANCE WITH THE RELEVANT STANDARDS.
WARNING Comply with the following (not exhaustive) instructions to ensure a prop-
er electrical connection:
- During installation and maintenance make sure that power supply to the electric lines
has been turned off.
- Use cables with minimum sections, rated voltages and installation type that are suit-
able for the characteristics indicated in paragraph "ELECTRICAL DATA" and the instal-
lation environment.
- The electrical connection terminal box compartment, schematised below, contains the
terminals to be connected to
- Always make sure that the cover of the terminal strip box is closed before switching
on the power supply, after having checked the integrity of the seal gaskets that ensure
the IP55 protection grade. For those screws use a 10 nm clamping couple
WARNING All motors are equipped with a grounding terminal.
Make sure all the plant is properly grounded.
WARNING BE SURE TO USE A CABLE GLAND, WITH SUFFICIENT PROTECTION
GRADE (Exd)
NOTICE IN THE EVENT OF INSTALLATION IN ZONES WHICH ARE NOT CLAS-
SIFIED, IT IS SUFFICIENT TO OBSERVE THE MINIMUM SAFETY STAN-
DARDS ALREADY MENTIONED IN THIS MANUAL.
- THE OWNER HAS THE RESPONSIBILITY TO VERIFY THAT ALL THE LO-
CAL AND NATIONAL REGULATIONS HAVE BEEN OBSERVED.
- MAKE SURE THAT THE CABLE CONNECTING THE BATTERY IS PRO-
TECTED FROM HEAT SOURCES AND SHARP EDGES. INSTALL THE FUSE
CLOSER TO THE BATTERY.
WARNING FAILURE TO OBSERVE THE ABOVE MENTIONED RULES CAN CAUSE SE-
RIOUS ACCIDENTS
Red Cable +
Black Cable -
GND
Switch
Motor
protector
t°C
1/2” NPT
INLET
TERMINAL BOX
COMPARTMENT

M0217E
30 /132
Installation, use and maintenance
11.2 PIPING CONNECTIONS
FOREWORD - Before carrying out any connection, refer to the visual indications i.e. arrow on the
pump head, to identify suction and delivery.
WARNING Wrong connection can cause serious pump damage.
PRELIMINARY
INSPECTION - Before connection, make sure that the piping and the suction tank are free of dirt and solid residue that could damage the pump and its accessories. NEVER COLLECT THE
FLUID FROM THE BOTTOM OF THE TANK SINCE IT MAY CONTAIN IMPURITIES
- Before connecting the delivery pipe, partially fill the pump body, from delivery side,
with the liquid that needs to be pumped in order to facilitate priming.
- Do not use conical threaded fittings, which could damage the threaded inlet or
outlet openings of the pump if excessively tightened.
12 INITIAL START-UP
FOREWORD - Check that the quantity of fluid in the suction tank is greater than the amount you
wish to transfer.
- Make sure that the residual capacity of the delivery tank is greater than the quantity
you wish to transfer.
- Make sure that the piping and line accessories are in good condition.
NOTICE THIS PUMP IS NOT PROVIDED FOR FURTHER REGULATION OF DELIV-
ERY AND PRESSURE
WARNING Fluid leaks can damage objects and injure persons.
NOTICE - Never start or stop the pump by connecting or cutting out the power
supply.
- Prolonged contact with some fluids can damage the skin. The use of
goggles and gloves is recommended.
IF THE PUMP
DOES NOT
PRIME
Depending on the system characteristics, the priming phase can last from
several seconds to a few minutes. If this phase is prolonged, stop the pump
and verify:
- that the pump is not running completely dry (fill with fluid from the delivery
line);
- that the suction pipe guarantees against air infiltration;
- that the suction filter is not clogged;
- that the suction height is not higher than 2 mt.
- that all air has been released from the delivery pipe.
AT THE END
OF THE INI-
TIAL
START-UP
When priming has occurred, verify that the pump is operating within the an-
ticipated range, in particular:
- that under conditions of maximum back pressure, the power absorption of
the motor stays within the values shown on the identification plate;
- that the delivery back pressure does not exceed the maximum back pres-
sure for the pump.

31/124
31 /132
This manual belongs to PIUSI S.p.A. Whole or partial reproduction of this manual is forbidden.
EN
EN (Translation of the original language) EX50 - EX75 12V
13 EVERY DAY USE
USE
PROCEDURE 1If flexible pipes are used, attach the ends of the piping to the tanks. In the absence of an appropriate slot, solidly grasp the delivery pipe before beginning dispensing.
2Before starting the pump make sure that the delivery valve is closed (dispensing
nozzle or line valve)
3Turn the ON/OFF switch on
4Open the delivery valve, solidly grasping the pipe
5While dispensing, do not inhale the pumped product
6IF ANY TREATED FLUID LEAKS OUT DURING DISPENSING, TAKE ALL STEPS
NECESSARY TO ENSURE THE LEAKED FLUID IS CLEANED UP AND SAFE AS
SPECIFIED ON THE PRODUCT TECHNICAL SHEET.
7Close the delivery valve to stop dispensing
8When dispensing is finished, turn off the pump
WARNING THE WORKING OPERATIONS MUST ALWAYS BE GUARDED BY THE OP-
ERATOR.
The by-pass valve allows functioning with delivery closed only for short pe-
riods (max. 3 minutes).
To avoid damaging the pump, after use, make sure the pump is off.
In case of a power break, switch the pump off straight away.
Should any sealants be used on the suction and delivery circuit of the pump,
make sure that these products are not released inside the pump.
Foreign bodies in the suction and delivery circuit of the pump could cause
malfunctioning and breakage of the pump components.
14 MAINTENANCE
Safety instruc-
tions The PUMP IS DESIGNED AND CONSTRUCTED TO require a minimum of maintenance.
Before carrying out any maintenance work, DISCONNECT THE PUMP from any elec-
trical and hydraulic power source.
During maintenance, the use of personal protective equipment (PPE) is compulsory.
In any case always bear in mind the following basic recommendations for a good func-
tioning of the pump
WARNING BEFORE ANY OPERATION, ENSURE TO BE OUT OF POTENTIALLY EX-
PLOSIVE AREAS FOR SAFETY REASONS IT’S NOT ALLOWED TO DISAS-
SEMBLE THESE PARTS : (1) BOTTOM (2) MOTOR PIPE (3) PUMP BODY
FOR SAFETY REASONS IT IS FORBIDDEN TO REMOVE THE PARTS
“BOTTOM PLATE” (1), “MOTOR TUBE” (2), “PUMP BODY” (3) AND LE-
VER PIN (4).
Authorised
maintenance
personnel
All maintenance must be performed by qualified personnel. Tampering can lead to
performance degradation, danger to persons and/or property and may result in the
warranty and UL/ATEX CERTIFICATION being voided.
Measures to
be taken Check that the labels and plates found on the dispensing system do not deteriorate or become detached over time.
ONCE A
WEEK: - Check that the pipe connections are not loose to prevent any leaks; - Check and keep the filter installed on the suction line clean.
ONCE A
MONTH: - Check the pump body and keep it clean and free of any impurities; - Check that the electrical supply cables are in good condition.

M0217E
32 /132
Installation, use and maintenance
15 NOISE LEVEL
Under normal operating conditions, noise emission of all models does not exceed
74 dB at a distance of 1 metre from the electric pump.
16 PROBLEMS AND SOLUTIONS
For any problems contact the authorised dealer nearest to you.
PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION
THE MOTOR IS NOT
TURNING
Lack of electric power Check the electrical connections and
the safety systems.
Rotor jammed Check for possible damage or ob-
struction of the rotating components.
Motor problems Contact the Service Department
THE MOTOR TURNS
SLOWLY WHEN
STARTING
Low voltage in the electric power line Bring the voltage back within the an-
ticipated limits
LOW OR NO
FLOW RATE
Low level in the suction tank Refill the tank
Foot valve blocked Clean and/or replace the valve
Filter clogged Clean the filter
Excessive suction pressure Lower the pump with respect to the
level of the tank or increase the cross-
section of the piping
High loss of head in the delivery cir-
cuit (working with the by-pass open) Use shorter piping or of greater diam- eter
By-pass valve blocked Dismantle the valve, clean and/or re-
place it
Air entering the pump or the suction
piping Check the seals of the connections
A narrowing in the suction piping Use piping suitable for working under
suction pressure
Low rotation speed Check the voltage at the pump. Ad-
just the voltage and/or use cables of
greater cross-section
The suction piping is resting on the
bottom of the tank Raise the piping
INCREASED PUMP
NOISE
Cavitation occurring Reduce suction pressure
Irregular functioning of the by-pass Dispense until the air is purged from
the by-pass system
Presence of air in the fluid Verify the suction connections
LEAKAGE FROM THE
PUMP BODY Seal damaged Check and replace the seal
THE PUMP DOES NOT
PRIME THE LIQUID
Suction circuit blocked Remove the blockage from the suc-
tion circuit
Malfunction of foot valve fitted on
suction circuit Replace foot valve
The suction chambers are dry Add liquid from pump delivery side
The pump chambers are dirty or
blocked Remove the blockages from the suc- tion and delivery valves
THE HEAT SENSOR
ACTIVATES UNDER
NORMAL OPERATING
CONDITIONS
Operating fault Contact the technical support..

33/124
33 /132
This manual belongs to PIUSI S.p.A. Whole or partial reproduction of this manual is forbidden.
EN
EN (Translation of the original language) EX50 - EX75 12V
17 DEMOLITION AND DISPOSAL
Foreword If the system needs to be disposed, the parts which make it up must be delivered
to companies that specialize in the recycling and disposal of industrial waste and,
in particular:
Disposing of
packing materi-
als
The packaging consists of biodegradable cardboard which can be delivered to com-
panies for normal recycling of cellulose.
Metal Parts
Disposal Metal parts, whether paint-finished or in stainless steel, can be consigned to scrap metal collectors.
Disposal of
electric and
electronic com-
ponents
These must be disposed of by companies that specialize in the disposal of elec-
tronic components, in accordance with the indications of directive 2012/19/UE (see
text of directive below).
Information
regarding the
environment for
clients residing
within the Euro-
pean Union
European Directive 2012/19/UE requires that all equipment marked with this symbol
on the product and/or packaging not be disposed of together with non-differenti-
ated urban waste. The symbol indicates that this product must not be disposed of
together with normal household waste. It is the responsibility of the owner to dis-
pose of these products as well as other electric or electronic equipment by means
of the specific refuse collection structures indicated by the government or the local
governing authorities.
Disposing of RAEE equipment as household wastes is strictly forbidden. Such
wastes must be disposed of separately.
Any hazardous substances in the electrical and electronic appliances and/or the
misuse of such appliances can have potentially serious consequences for the envi-
ronment and human health.
In case of the unlawful disposal of said wastes, fines will be applicable as defined
by the laws in force.
Miscellaneous
parts disposal Other components, such as pipes, rubber gaskets, plastic parts and wires, must be disposed of by companies specialising in the disposal of industrial waste.

Bulletin M0217e ml_00 08.2020
IT. Il presente documento è stato redao con la massima aenzione circa la precisione dei dati in esso contenuti. Tuavia, PIUSI S.p.A. non
si assume responsabilità per eventuali errori ed omissioni.
EN This document has been drawn with great care about the accuracy of the data contained therein. However, PIUSI S.p.A. takes no
responsibility for any mistakes and omissions.
FR. Ce document a été rédigé avec la plus grande aention quant’ à l’exactitude des données qu’il contient. PIUSI S.p.A. n’assume aucune
responsabilité pour les éventuelles erreurs et omissions.
DE. Dieses Dokument wurde sorgfältig unter Berücksichtigung aller wichtigen darin enthaltenen Daten erstellt. Trotzdem übernimmt, PIUSI
S.p.A. keinerlei Gewähr für eventuelle Fehlangaben oder Auslassungen.
ES. Este documento se ha redactado con la máxima atención a la exactitud de los datos que contiene. Aún así, PIUSI S.p.A. se exime de toda
responsabilidad por los posibles errores y omisiones.
DE. Dieses Dokument wurde sorgfältig unter Berücksichtigung aller wichtigen darin enthaltenen Daten erstellt. Trotzdem übernimmt, PIUSI
S.p.A. keinerlei Gewähr für eventuelle Fehlangaben oder Auslassungen.
DA. Det foreliggende dokument er blevet udarbejdet med størst mulig omhu for at sikre nøjagtigheden af oplysningerne i det. PIUSI S.p.A.
påtager sig dog intet ansvar for eventuelle fejl og mangler.
RU. При составлении настоящего документа самое большое внимание обращено на точность представленной в нем информации.
Тем не менее, PIUSI S.p.A. не несет ответственность за возможные ошибки и упущения.
© PIUSI S.p.A.