Atlas Copco WEDA L95 manual 

ELECTRIC PUMP
WEDA L95
--------------------------------------------
Instructions handbook
Polígono Pitarco II, Parcela 20, 50450 Muel, Zaragoza, Spain.
Made in Italy
Printed matter Nr.
2960 3480 00

ELECTRIC PUMP WEDA L95
INSTRUCTIONS HANDBOOK
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ELECTRIC PUMP WEDA L95
INSTRUCTIONS HANDBOOK
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INDEX
PRESENTATION..………………………………………………………………. pg. 3
WARRANTY REGULATIONS.…………………………………………………. pg. 4
1.0 DESCRIPTION…………………………………………………………………... pg. 5
2.0 TRANSPORT, ASSEMBLY AND DEMOLITION.……………………………. pg. 6
3.0 STARTING AND OPERATION…………..…..………………………………... pg. 10
4.0 MAINTENANCE AND CLEANING.…..………………………………………...pg. 12
5.0 NOISE…..…….…………………………………………………………………...pg. 16
6.0 SAFETY…………………………………………………………………………...pg. 17

ELECTRIC PUMP WEDA L95
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PRESENTATION
This instructions manual has been conceived and structured for rapid and easy consultation, thanks to the
index ordered by subjects, and explanatory figures and tables.
GENERAL WARNINGS
This instructions manual must be studied by the owner of the machine, the technical personnel within the
factory, the operators, that is, all those that will be using the machine, the maintenance technician.
The manual is an integral part of the machine and contains information on its use, technical characteristics, as
well as instructions for handling, installation, assembling, regulation and maintenance.
It also contains a section for trouble-shooting, if necessary, and for the ordering of spares.
The Atlas Copco technicians are always available, by telephone, fax or e-mail, to supply all the explanations
that may be needed.
This manual:
-must be considered as integral part of the machine until it is taken to the breakdown yard;
-must be kept in an easily accessible place and suitable for its preservation;
-must be consulted each time that there are problems or doubts on the operation of the machine;
-must be carefully followed for whatever regards the necessary maintenance operations set out in it.
In case it is lost, apply for a copy directly from Atlas Copco.
Atlas Copco reserves the right to carry out all modifications to update the machine or instructions manual
according to the technological progress and the state of the art.
This constitutes no obligation to carry out modifications to the machines that have already been sold. If the
machine is ceded to a third party, it is recommended that of the instructions manual follow it.
ATLAS COPCO RETAINS ITSELF FREE FROM LIABILITY OF ANY KIND, AND ESPECIALLY FOR:
-improper use of the machine;
-use of the machine by personnel not trained to used it;
-power supply defects;
-maintenance defects;
-unauthorized and unforeseen modifications;
-use of spares that are not original or not specific for the model;
-non observance of the instructions;
The uses of the machine for different purposes are to be considered dangerous for the operator and for the
machine. Likewise, modalities of installation and utilizations different from that indicated in the present manual
could cause damage to persons and/or to the machine itself.

ELECTRIC PUMP WEDA L95
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WARRANTY REGULATIONS
Atlas Copco guarantees the original user that the machine will be reasonably free from factory and material
defects.
This warranty lasts for 12 ( twelve ) months from the invoice date, and refers to the repairing of any defect that
will be recognized by Atlas Copco as being subject to warranty.
The warranty does not apply to those parts that result defective because of incorrect use, handling or bad
observance of the use and maintenance instructions supplied by Atlas Copco.
The warranty is not applied for those listed parts subject to normal wearing:
- seals and gaskets, shaft sleeves, impeller, stirrer, wear-plates, casing, discharge adapter, excavator teeth
and electrical components;
The warranty on the electric motor is applied only if the standard electronic control console foreseen has been
installed.
If the Purchaser tries, either to repair any fault that is under guarantee, or obtain direct supply of the spare part
without previous written consent of Atlas Copco the latter will not be responsible for the results of the repair
and will not be held to reimburse the expenses sustained by the Purchaser.
Any claim for warrantable failures shall be sent in writing to Atlas Copco prior to the expiry of the warranty
period.
As soon as the spare is ready, the Client will make the defective part available to Atlas Copco.
The warranty is applied in one of the following ways and at the discretion of Atlas Copco :
-replacement of defective part with a new one, made available in the offices of the Purchaser at the
lowest transport rate;
-repair of defective part, after this has been returned to Atlas Copco with transport expenses prepaid.
Atlas Copco declines all responsability for the expenses due to “down-time”, business costs and losses
deriving there from.
This warranty is the sole warranty provided by Atlas Copco.
There are no other warranties, explicit or implied, or of merchantability or fitness for a particular purpose.

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1.0 DESCRIPTION
STRUCTURAL DESCRIPTION OF THE MACHINE (Fig. 1)
The Atlas Copco motor driven pumps are made of high quality materials and undergo severe controls before
leaving the factory.
They are essentially made up of a cylindrical pump casing 3inside of which is housed an electrical motor 4.
The upper part 2is completely water-tight, and contains the terminal box for connection to the electric motor,
the seal is guaranteed by the cover 1and by a series of seals.
Inside the oil housing 5is housed the group of seals and gaskets 11 that prevents the water from passing to
the motor.
On the main shaft 12, inside the casing 6there is a keyed impeller 7, made in high chrome content anti-wear
materials.
A wear plate 8, made with the same material, partially closes the impeller inlet.
Inside the strainer protection 9houses a cutter 10 that rotates and stirs the mixture of solids in the water to be
pumped.
Fig. 1
6
2
5
10
4
3
7
8
1
9
12
11

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2.0 TRANSPORT, ASSEMBLY AND DEMOLITION
Atlas Copco pumps are generally transported encased inside a crate to avoid damage to the pump or parts of
it.
The crate is arranged for unloading with a fork-lift truck, whose capacity must be able to sustain the weight of
the pump ( see data sheet enclosed in this instructions handbook ) as shown in Fig. 2.
The pump is placed inside the crate as seen in Fig. 3, it must be freed from the packing and lifted with ropes
hooked to the appropriate lifting plate A.
Fig. 2
Fig. 3

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INSTALLATION
1) Connect the delivery pipe.
-The delivery pipes must never form siphons (Fig. 5) pag. 6, to avoid problems due to the formation of
air pockets or deposits of solid material.
-Before connecting then pump to the electrical supply source, make sure that all the data on the rating
plate correspond ( voltage, power, absorption, etc. )
The pump is supplied with a supply cable already connected.
2) Connect the end of the wires to the control panel, taking care to respect the power supply phases and the
yellow/green ground wire that will be connected to the general grounding system of the plant.
-The user must guarantee the electrical conductivity between the machine and the main grounding
system of the plant.
NO!
Fig. 5
Fig. 4

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3) If the electric cable has not been requested proceed as follow (Fig. 6) pag. 7:
-Remove screws 32, lift upper cover 3.
-Remove screws 27 and lift the cable lock 2.
-Slip the cable lock 2onto the electric cable and after that the seal composed by Kit 1( rubber sleeve ),
1A ( steel washer ), 1B ( rubber washer ) alternating the iron washers with the rubber washers.
-Slip on the upper cover 3, taking care that the still completely insulated cable comes out sufficiently to
be connected to the terminal box35.
-Tighten the screws 27 until the cable 2lock rests on the upper cover 3, making sure that the composed
pack is sufficiently compressed to avoid water leaking in.
-Insert the seal 34 in its lodging.
-Connect the electric cables to the terminal box, including the yellow/green ground cable, to the screws
prepared for this purpose.
-Position upper cover 3on the pump casing, making sure that the seal remains in its seat, to avoid
damage and as a result water leakage, tighten down the screws 32.
Fig. 6

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Warning: the pump supply cable must be a cable HO7RN-F type with rubber insulated flexible wires,
chloroprene-type 076 internal sheath in compliance with CEI 20-19- mark HAR with a cross-section for the
current absorption of the pump, or of equivalent type.
DISMANTLING
Before doing anything on the pump, be sure to disconnect the electrical supply and disconnect the delivery
pipes.
Warning: the machine that is considered completely useless must be removed from the department and
collected by the manufacturer or any other firm specialized in demolition. Remember that dismantling the
machine in your establishment will “produce” different materials ( metals, plastics, oil, etc. ) whose
disposal will be done in compliance with the legislative regulations in force in the state where the machine
is found.

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3.0 STARTING AND OPERATION
STARTING
The pump has been created to pump suspended matter, even with solid parts, as long as water is always
present. It can be used for civil and industrial purposes, as long as conditions described in this manual are
observed.
ATTENTION
1) The control panel has a switch to which must be applied a device with a lock that
stops the use of the pump. The key will be given to someone in charge who will be
responsible for all the operations which he will supervise to avoid improper use of the
machine.
Check the direction of rotation: by passing very short current
impulses with the START/STOP switches placed on the control
panel, and check that the direction of rotation is that indicated
on the rating plate.
2) Immerse the pump in clear water and push the “START”
button.
3) If any priming problems should come up, stop the pump by
pressing the “STOP” button and wait for about 30 seconds,
leaving it immersed, until all the air has been eliminated.
4) Never operate the immersed pump without connecting the
pipes, because not sensing the load loss foreseen, the
electric motor could overshoot the maximum current absorption
(and in the absence of the suitable safety devices be completely
damaged). When only water is pumped, absorption should be 20% below that allowed.
If this is not the case, the load loss must be increased, in one of the following ways:
-by adding pipes
-by creating bottlenecks
-raising the discharge height
5) Slowly lower the pump until it comes into contact
with the material.
6) Check the percentage of solid in order not to
go over the maximum absorption limit.
7) When clean water is not available, but only
mud and other mixtures, check that the pump
does not go over the maximum absorption limit
indicated on the rating plate (Fig. 7); however, if
this does happen, create a further load loss,
acting as indicated at the preceding point 4.
8) Before stopping the pump, it is always a good
rule to pump water with very little solid in it, so
that the pipes are washed.

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EMERGENCY SITUATIONS
The correct use of the machine excludes the possibility of emergencies happening during operation or during
cleaning and maintenance, unless the latter have not been done in compliance with this instructions manual.
a) In case of imminent danger of a mechanical origin, press, or have someone press, the emergency stop
button, and immediately afterwards switch off the general cutout switch or disconnect the plug. An
accurate search for the fault, or anomaly that caused the danger, must be carried out soon afterwards,
and once detected, see to resetting the operation of the machine and of the protection set-up.
If necessary, have Atlas Copco Service or competent personnel from another firm carry out any
repairs or work.
b) If a current loss should be found, felt by touching metallic parts of the machine, switch off the general
cutout switch and have an expert electrical technician come in, or contact Atlas Copco Service for
further details.

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4.0 MAINTENANCE AND CLEANING
Warning: maintenance and cleaning of the machine must be done after having stopped the machine.
1) Check the tightness of the fastening screws every 50 hours of pump operation.
2) Remove the 3 (three) plugs marked by the labels GREASE, Fig. 8, and restore the grease with 50
grams of it for each greaser, using a hand grease gun. Seals zone must be greased every 8 hours.
3) Every 200 hours check the clearance between the impeller 19 and the lower wear plate 20 is as
follows (see Fig. 9).
-keep the pump in a vertical position;
-dismantle the side strainer 25 by removing the screws in position 67;
-check that the clearance is not more than 1 mm, if it is wider proceed as follows:
-slacken of the fastening screws 68 - 69;
-take the wear plate 20 at a distance of about 1 mm from the impeller 19, by turning the adjustment
screws 70 and locknuts 73;
-check that it rotates freely;
-fasten both the locknuts 73, the adjustmentscrews 70 and the fastening screws 68 - 69;
-fit again the strainer 25 using the screws 67;
(Use the torque table for tightening).
Fig. 9
blocking
screws
Fig. 8
"GREASE"
-greasing every
150 hours--
"GREASE"
-greasing every
8 hours--
adjusting
screws

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4) For customers that work with particularly abrasive
materials having a very fine particle size, we advise
passing a jet of water under pressure, connecting it
to the prepared threaded connector indicated with
H2O (Fig. 10). The pressure must be greater than
that exerted by the pump to have continuous cleaning
of the area of the seals and so less wear.
It is compulsory to grease the area of the seals
at the end of each shift or every 8 working hours,
use water resistant grease with LIQUILON.
5) Check the level and the deterioration of the oil
every 8 hours of operation by removing the plug
labelled “OIL” (Fig. 11). For a total oil change or
topping up, the following steps have to be taken:
a) It is good practice to empty the pump completely
of the remaining oil. The exhausted lubricant must
be disposed of in conformity with the laws in force
in the country where the machine is used, since its
dispersal in the ground will pollute the water beds.
This is not necessary if the oil is simply topped up.
b) Remove the plug marked ”OIL”.
c) Top up until completely full using a funnel on side up to the indicated "OIL LEVEL" (Fig. 11), approx
5 Kg of oil having the characteristics as in the table following.
d) Before closing the plug change the copper washer to prevent leaks and water seeping in.
If the oil is “milky” white color the seals must be replaced.
Fig. 11
OIL LEVEL
"OIL" oil filling
Top up with funnel
Oil type
ISO
Viscosity Cst 40°C
Viscosity Cst 100°C
Density kg/m³
S32
32
32
5,4
857
“WATER”
water
washing
Fig. 10

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REPLACING THE SEALS
-Completely empty the oil from the oil chamber.
-Remove the filter 53 (Fig. 12) by unscrewing the screws 21.
-Unscrew the cutter 54 by hitting it smartly in an anticlock-
wise direction as shown in Fig. 13; make sure the impeller
47 (Fig. 12) is blocked with an iron rod.
-Remove the connection 56 (Fig. 12a), then the nut 57 and
the spacer 58.
-Extract the flange on the suction side 50 (Fig. 12) after
having removed the screws 52. With the flange pos. 50
the lower wear plate 48 also will come down.
-Remove the casing 45 (Fig. 12) after having removed the
screws 42.
-Extract the impeller 47 using two levers “A” (Fig. 12).
If it sticks use an extractor, taking care not to damage the
threaded part of the motor shaft.
-Remove the key 59 and slacken the screws 42a (Fig. 12)
to let the upper wear plate 46 coming down.
-Unscrew the grub screws 25 to release the spacer 20 and
then the seal 66 (Fig. 14, pg.16).
Remove the seals housing 67 and 65 (Fig. 14) after having
removed the screws 78.
-Extract the shaft sleeve 31 and the mechanical seal 93.
Clean carefully the shaft and all the housings and take
care not to damage any spare parts (follow Fig. 14).
-Change the mechanical seal 93 (n°1).
-Change the seals 36 (n°1), 41 (n°2) and the two o-rings
“OR” 23 (n°1) and 26 (n°1) of the seals housing 67.
-Change the lower shaft sleeve 31 and its o-rings 28 (n°2).
-Fit the spacer 27 on the shaft 14 (Fig. 14a).
-Fix back on the lower sleeve 31 and the seals housing 67.
-Place the seal 66 as shown in Fig. 14 and lock it inside
using the spacer 20.
-Do not forget to screw in the grub screws 25.
54
N.B. First block
the impeller
Fig. 13
Fig. 12
Fig. 12a

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Fig. 14
18
40
91
14
28
31
28
66
41
36
41
64
23
93
78
26
20
46
25
67
65

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-To reassemble follow the instructions in the reverse order keeping the pump in vertical position.
Remember to adjust the lower wear plate 48 (Fig. 9 pag. 13) before closing the pump definitely.
Top up with new oil, according to the instructions of paragraph 5) pag. 14.
Once a year, each time that repairs have been carried out, when extraordinary events have
occurred, the user must check the state of the electrical, insulation and the continuity of the
protection circuit.
When parts of the electrical equipment are replaced, components with electrical characteristics as
similar as possible to the originals must be used.
The supply cable MUST be replaced as soon as damage to the external insulation is found.
PUTTING THE MACHINE OUT OF SERVICE
If for any reason whatsoever the machine should be temporarily placed out of service, it is important to
disconnect the electricity supply, clean it and cover it to protect it from dust.
To put it back into service again follow the instructions for starting up.
5.0 NOISE
The machine was designed and manufactured while at the same time keeping in due consideration air noise
hazards. The construction techniques used allow to limit the noise level within tolerable limits in compliance
with the Machine Directive 2006/42/CE.
Air noise detection was effected by placing the probe two meters from the machine, along the whole perimeter
and at a meter from the floor. The noise was measured under vacuum. This because the machine itself does
not require any specific operation position fixed by the operator since it is normally immersed in water and
therefore the values are non-influencing.
The observations were done with a model HD9020K1 DELTA OHM PRECISION INTEGRATOR NOISE
METER in conformity with the: IEC651 class 1 standard
IEC804 class 1
IEC225 filters 1/3 octave
The instrument was calibrated with a DELTA OHM HH9101 calibrator conforming to the IEC942-1986 class 1.

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6.0 SAFETY
Introduction
Atlas Copco has designed and built the machine keeping in mind the results of a preventive and accurate
analysis of the risks connected to the use of the machine.
The protections and devices applied, therefore, represent the profuse commitment by the Atlas Copco
technicians to achieve the aim of safety sanctioned by the specific directives issued by the EEC. The
protections and devices are illustrated below with drawings.
Other instructions and information on the safety of the machine are contained in the paragraphs which deal
with the use, maintenance and repair.
All the organs in movement are segregated inside the pump structure.
The only rotating mechanical part is the agitator 54 ( Fig. 16 ), that for functional reasons cannot be protected
in any way.
In fact its specific function is that of cleaning the strainer 53 and stirring the solid bodies present in order to set
them in suspension in the liquid to be pumped (Fig. 16 ).
On the pump there is a warning plate ( Fig. 15 ) to remind us of this danger.
When about to operate the pump, keep clear of this rotating part in order to avoid
accidents.
The strainer 53 ( Fig. 16 ) is made according to the suction capacity of the pump, and does not allow the
passage of particles of over 35 mm diameter.
It is a good rule not to come close to the pump when it is immersed in water to avoid dangerous situations.
Do not open without having first
switched off.
On the pump there is a warning plate to remind us of this
danger ( Fig. 15 ). The upper part of the pump contains
the electrical terminal box of the motor.
Fig. 15
Fig. 16

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It is protected in a sealed chamber by means of a series of seals, that avoid water leakage.
The rated voltage present is that expressed on the rating plate ( Fig. 17 ).
When starting check:
-the correct connection of the phases;
-the correct direction of rotation of the motor;
The direction of rotation is expressed on the rating plate ( Fig. 17 ).
INDIRECT CONTACT PROTECTION
All the metal masses are grounded with a yellow/green wire.
The user MUST GUARANTEE the electrical conductivity between the machine and the main grounding system
of the plant.
-The machine has an overall protection rating of IP68.
-The electrical tests carried out on the machine, in conformity with what is provided for by the
EN 60204-1/1992, point 20.1 and following, have had a positive outcome.