PREX PRO Power Jet User manual

PREX
PRO
www.prexpro.eu
Power Jet
Instructions for use and routine
maintenance

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Knowledge of the machine.....................................................................................4
Standard accessories...............................................................................................5
What is a high pressure cleaner.............................................................................5
Safety rules...............................................................................................................6
Warnings ...................................................................................................................6
Operating and maintenance instructions and procedures ................................8
Installation................................................................................................................11
Prerequisites........................................................................................................11
Operation .............................................................................................................11
Use of detergent injector.......................................................................................12
Chemical and detergents allowed for use............................................................12
Safety and protection devices ...............................................................................13
By-Pass valve........................................................................................................13
Main magnetothermic switch ............................................................................13
Switching off and storage ......................................................................................14
Maintenance.............................................................................................................15
Possible troubles - their causes and remedies ....................................................16
Warranty terms and conditions .............................................................................17
Validity ..................................................................................................................17
Warranty Conditions ...........................................................................................17
Declaration of conformity ......................................................................................19
Electrical diagram....................................................................................................20
Original instructions
Warning
Read this instruction man-
ual before operating the
machine.
Index

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1. Electric Wire
2. Oil inlet
3. Detergent adjust. on the
Lance
4. High pressure outlet
5. Water inlet
6. Detergent intake hose
7. Detergent tank
8. Main switch
9. Pressure Gauge
10. High pressure hose
11. Gun with lance
12. Label of technical data and
manuf.number
7
6
3
12
10
11
1
8
29
4
5
4
Mod. Code:
Serial Number:
Volt/Phase:
Hertz:
Abs. Current:
Protection:
Motor Power:
Pressure:
Permissible Press:
Flow Rate:
Weight:
Date:
Knowledge of the machine
Note: Max noise emission of the high pressure cleaner 78 Db
Serial Number
Model code
Electrical data
Pressure data
Flow Rate
Weight
Production Data (Week/year
Legend:

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2
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Standard accessories
1. High pressure hose
2. Gun + single lance
Legend:
What is a high pressure cleaner
The machine you have bought is a cold water high pressure cleaners, suitable
to clean any type of surface, by simply adapting the washing parameters. The
cleaning power of the water stream can be improved by feeding the machine
with hot water, at the max temperature of 70 °C.
The adjustable detergent device allows for dosing the chemical products ac-
cording to the different cleaning task. The distance between the nozzle and
the surface to be cleaned is important, although the efficiency of the water jet
decreases proportionally to the ideal distance of work when start to be paral-
lel. The operator has of course to consider the nature of the objects he’s going
to clean, and their resistance to mechanical action of pressure, to the terminal
action of temperature and to the chemical action of detergent: he will use a
convenient jet, by limiting or by increasing the a.m. parameters in a logical way.
The operator will carefully observe all the directions and advices given in the
present manual in order to prevent accident due to improper use of the clean-
er. Never forget that a high pressure water jet can turn into a very harmful
weapon.

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Safety rules
Before operating the machine make sure that the connection to the power sup-
ply complies with the in force safety rules and the voltage and KW correspond
to the data stated onto the machine label. Never use the electropump if the
connection is not properly made. In case of extension cord, make sure that the
following conditions are respected: lenght of extension up to 50 m for wires
with section up to 4 sqmm; the section becomes 4 and 5 sqmm respectively in
case of 3-phase machines connected at 400 Volt.
The junction between the wire and the extension cord must be properly made
according to the rules.Before turning on the motor, make sure that the gun
trigger is locked on the off position, otherwise the high pressure water jet com-
ing out suddenly may turn the lance into a very harmful thing. If, for switching
the machines off , or for any other reason whatsoever the lance is let down
and the pump is running in By-pass, lock the gun trigger in the off position by
means of the special lock device provided in order to avoid incidental actioning.
Do not intervene on the machine and its accessories when operating.
Do not direct the water jet towards people, animals, frail objects or the ma-
chine itself
Warnings
• The electropump must be continuously and sufficiently fed with clean wa-
ter at volume that must be at least to that of the pump.
• Should the pump run in dry mode, the gaskets and may be seriously dam-
aged.
• Although the electrical equipment of the machines is protected against
water, never use the machines under the rain and never direct the water
against the pressure cleaner itself.
• Avoid operate the machine in places that are non aerated enough and care
not to cover it, thus reducing the necessary aereation inside.
• Do not let the electropump exposed to severe temperatures try protect it
against icing.
• Do not feed the machines with water having a temperature that exceeds 70
°C, otherwise this will inevitably cause seals damages.
• Carefully avoid to let the machines run in BY-Pass condition for longer than
4 hours * in order to prevent the recirculation By-Pass water from heating

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up too much.
• On Total - Stop version the motor switches off immediately when the gun
trigger is released. The motor switches on again when the gun trigger is
pressed again.

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Protect from frost
Proteggere dal gelo
Operating and maintenance instructions and procedures
Reading this instructions manual before using the ma-
chine.
The connection to the main must be carried out by a
skilled electrician and must respond to the latest IEC rules
released on the electrical connections.
It is strongly recommended that the electrical power sup-
ply for this machines includes either a device of residual
current that must cut-off the Power Supply if the disper-
sion power to the earth exceeds 30 mA for 30 mS, or an
earth control circuit.
The high pressure beams can be very dangerous if they
are used incorrectly. The water beam must never be di-
rected towards people, animals, electrical apparatuses
under Voltage or the cleaner itself.
Never direct the high pressure jet against yourself or oth-
ers with purpose of cleaning clothes or shoes.
Before any cleaning and reparing operation the machine
must always be disconnected from the power supply.
The high pressure hose are very important for the safety
of the machines. In case of replacement, always use origi-
nal spares. For any need of spares or technical assistance,
apply to the nearest authorised service center.

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The high pressure cleaners must never be used by children
or by people who are not aware of the procedures and
warming stated in this manual.
Never use the machine when other people are near to
your operating site.
This machines has been conceived to be used with a clean-
ing product supplied or recommended by the manufactur-
er. The use of their detergents or chemical matters may
compromise the safety of the machine.
Only liquid detergents are to be used.
When using the machine, wear always protective clothes.
Any time the machines is turned off discharge the pres-
sure left in the hose by pulling the gun trigger.

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Avoid that vehicles move near the machines and squeeze
the high pressure hose.
Provide that the machines is not subject to severe tem-
peratures: Ice may form up and cause considerable dam-
age to the high pressure pump.
Compliance with the above rules will allow you to use the pressure washer for
a long time, avoiding the causes of breakdowns and dangers deriving from the
use of the machine itself.

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B
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Installation
1. Make sure that the power supply
characteristics of your electric plug
match with those indicated on the
machine plate. Make sure that your
electrical equipment is provided
with an efficient earth and with a
life saving differential switch with
intervention threshold from 30 mA
or below. Once the above has been
verified, plug your machine into the
electrical socket.
2. Position the machines on an even
floor.
3. Verify that the water supply volume
is enought (min. Pressure 1,5 Bar -
max.pressure 4bar), then connect
the water feeding hose to the spe-
cial connector B and the high pres-
sure hose to the outlet connector C.
4. Open the water feeding tap.
Operation
1. Press the magneto-thermic main switch to “On”.
2. Pull the trigger in order to let air of the pipes circuit.
3. The recoil force of the High pressure Cleaner varies between 15,7N and
43,3N
Prerequisites
Warning
Because of the high pressure of the wa-
ter jet a counter strike occurs. The oper-
ator should hold the gun and the handle
firmly.

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A
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Use of detergent injector
This device makes it possible to intake liquid detergent at the pump water
delivery. In order to adjust the quantity of detergent to be intaken, turn the
valve B on the body of the machine. To suck automatically the detergent, pull
the device A.
Chemical and detergents allowed for use
Always use detergents and chemicals specific for use on high pressure clean-
ers, of known brandad accompanied by technical specifications.
In case of doubts apply to the manufacturer.
Chemicals which can cause explosion or intoxication are not allowed
Read carefully the directions for use of all products you have intention to use
and ascertain their possible dangerousness. (If irritating, toxic or otherwise
noxious)
Always use suitable individual protective means.
CAUTIONS: Never waste the cleaning solutions directly in the enviroment.
In any case make sure of their non toxicity and bio-degradability.

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Safety and protection devices
A by-pass with a ball non return valve and packing on O-ring.
The BY-pass activation pressure is adjustable by means of a knob, for values
included 45 and 200 bar.
Purpose of the By-pass is to let the delivery pressure exceeds, for any reason
whatsoever the pre-set value.
For instance, the by-pass valve is activated when there is an obstruction after
the pump delivery (e.g. a clogged nozzle) or any time the gun trigger is re-
leased during the pump running.
By-Pass valve
Main magnetothermic switch
This part provides for the protection to the whole electrical installation and
comes up when a short -circuit, an overabsorption or an overtemperature occur
at the electrical equipment.
In this case let cool for few minutes the motor, lock the gun trigger using the
lock device to prevent inconvenient.

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Switching off and storage
Switch off the main switch.
Disconnect from the electrical mains, turn the water tap
off and disconnect the water feeding hose.
In order to make the next starting of the machine easier,
and in order to extended the motor’s life, when the ma-
chine is off discharge the pressure water in the circuit by
pulling the gun trigger.
Warning
When storing the machine wind the wire and the
high pressure hose in order not to damage them,
then store the high pressure cleaner in a place pro-
tected form cold and where it cannot be reached
by abusers.

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B
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Maintenance
Check the oil level in the pump dailly.
Through the special level indicator “D”
and if it is necessary fill in more oil until
the right level shown in the picture is
reached. Use oil type 15W40.
For the oil replacement remove the
cap with level “D“.unscrew the cap “B”
and discharge the oil. Replace the oil
every one month or every 300 opera-
tion hours.
Every two weeks or every 50 Hours
of operation, clean the water filter
through a compressed air stream.
Warning
Used lubrificants must be collected and treat-
ed in accordance with legal dispositions, since
duping them into the environment can cause
pollution of water channels.

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Possible troubles - their causes and remedies
Trouble Cause Remedy
The pump don’t reach
the require pressure
Nozzle inadequate or
worn unloader valve
seat faulty
Change nozzle, replace
the valve seat. Clean or
replace valves
The pump is noisy Pump sucking air Check suction mainfold
and connection
Pressure gauge fluctu-
ates
Valves blocked by for-
eign particles, or worn
Gasket worn
High temperature of
pumped liquid
Clean or replaces valves
Replace gaskets
Reduce temperature of
pumped liquid
Water leaks from the
bottom of the pump
Piston gasket worm Replace Piston gasket
Water leaks from head Head O-ring worm Replace O-ring
Oil leaks from the bot-
tom of the pump
Oil seals worm Replace seals
Over pressure (build up)
when gun is closed
Overpressure ehwn
closing rhe lance
Check the valve and set
new pressure level.

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Warranty terms and conditions
This product is covered by a twenty-four (24) months warranty, starting from
the purchase and/or test date. This warranty protects the user against manu-
facturing or material defects. In case the machine is used for professional ap-
plications, this warranty covers a period of twelve (12) months (ex C.L. no°422
art.1 par. B).
Validity
Warranty Conditions
1. The in-warranty repair is accepted only if the product is accompanied by the
purchase receipt and the test report issued by the supplier.
2. Manufacturing company duty is limited to the repair and, at its own discre-
tion, the replacement of the whole product or of single faulty components.
3. The suppliers and the technicians allowed to carry out in-warranty repairs
are only those expressly authorized by the manufacturer
4. This product or its materials are not considered as faulty in case the custom-
er needs to adapt the machine to technical or national safety regulations
other than those in force in the country originally foreseen for the product.
No refund shall be granted for damages arising from the above-mentioned
modifications, or other changes not connected to the original design of the
product, carried out by the customer/user or by unauthorized people.
5. The warranty does not apply to:
a. Periodical checks, maintenance operations, replacement of components
subject to wear;
b. Transport, transfer or installation of the product;
c. Damages caused by fire, water, natural events, war and riots, incorrect
power supply, insufficient ventilation of the installation place, and any
other cause not connected the manufacturer;
d. Incorrect use, operating errors and wrong or unwary installation;
e. Damages to the product due to non original manufacturer spare parts
use;
f. Damages to the product or insufficient performance due to incorrect in-
stallation after purchase;
g. Every damage to the product due to negligence.
6. This Warranty is valid for every person formally having the propriety of the
product during the above-mentioned period.
7. This Warranty does not affect the rights of the customer as prescribed by

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the law in force in the country, nor the rights of the customer towards the
retailer arising from the contract of sale.

Prex Pro www.prexpro.eu
I, the undersigned, acting legal representative of the company
Declare that the following appliances:
Power Jet
Comply with the current laws in force, which implement the fol-
lowing directives and also declare that all the following regula-
tions and/or technical specifications have been applied:
19
2004/108/CE EMC
EN 61000-3-2/A2:2009
EN 61000-3-3:2008
EN 55014-1/A1:2009
EN 55014-2/A2:2008
2006/42/CE Machinery
EN 60335-1:2010
EN 60335-2-79:2009
EN 62233:2008
EN ISO 12100-1/A1:2009
EN ISO 13857:2008
Declaration of conformity
The production company is:
SIMMM Engineering s.r.l.
Via A. Martini 6-8-10
20092 - Cinisello Balsamo (MI) - Italia
Tel [phone]

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L
N
TS
PR
MP
IG
L
N
PR
IG
MP
Electrical diagram
Single phase with delayed total
stop
Single phase with direct total
stop
Legend
IG Main switch
MP Pump engine
PR Pressure switch
RRelay
TS Total stop