SK L Series User manual

Škrlj d.o.o., tel.: ++386 (0)5 36 43 500 – fax: ++386 (0)5 36 43 525 www.sk-group.biz - [email protected]
matina št.: 5559839 – davna št.: 94136408
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PNEUMATIC PRESSES
SERIES
L
PSP_PST_ 21/29/42/55
OPERATION AND MAINTENANCE MANUAL

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TABLE OF CONTENTS:
1 INTRODUCTION ........................................................................................................................... 4
2 PURPOSE OF PNEUMATIC PRESS ............................................................................................ 4
3 GUARANTEE ................................................................................................................................ 4
4 HEALTH AND SAFETY................................................................................................................. 5
4.1 Meaning of the symbols....................................................................................................... 5
4.2 GENERAL SAFETY PRECAUTIONS .................................................................................... 5
4.3 SAFETY DEVICES................................................................................................................. 6
4.3.1 Emergency STOP button................................................................................................. 6
4.3.2 Safety cord ...................................................................................................................... 7
4.3.3 Protection against overpressure in the drum ................................................................... 8
4.3.4 Overload relays ............................................................................................................... 8
5 PRESS TRANSPORT AND SETTING UP..................................................................................... 9
5.1 Transport of the press.......................................................................................................... 9
5.2 Mounting and storage of the press ................................................................................... 10
6 SWITCHING ON THE PRESS..................................................................................................... 11
6.1 Electrical connection.......................................................................................................... 11
6.2 Rotating direction of the drum .......................................................................................... 12
7 GENERAL DATA......................................................................................................................... 13
7.1 Technical data (dimensions and capacity) ....................................................................... 13
7.2 Press orientation ................................................................................................................ 14
7.3 Pneumatic press operation................................................................................................ 15
8 DESCRIPTION OF THE PNEUMATIC PRESS ........................................................................... 16
8.1 Components........................................................................................................................ 16
8.2 Built-in components........................................................................................................... 17
8.3 Materials.............................................................................................................................. 18
8.4 Sliding hatch....................................................................................................................... 18
8.4.1 Double sliding hatch (manual opening/closing).............................................................. 18
8.4.2 Double hatch with pneumatic drive (optional) ................................................................ 20
8.4.3 Hermetic hatch with manual opening/closing (optional for PST).................................... 21
8.4.4 Hermetic hatch with pneumatic drive (optional for PST) ................................................ 22
8.5 Press drum.......................................................................................................................... 23
8.6 Juice collection pan ........................................................................................................... 24
8.6.1 Small pan on guides (optional on PS_21 and PS_29) ................................................... 24
8.6.2 Large pan on wheels (optional on PS_21 and PS_29) .................................................. 25
8.6.3 Pan on guides (PS_42 and PS_55)............................................................................... 25
8.7 Control box ......................................................................................................................... 26
8.8 Optional equipment............................................................................................................ 26
8.8.1 Strainer on the collection pan outlet .............................................................................. 26
8.8.2 Level switch in the collection pan .................................................................................. 27
8.8.3 Equipment for macaration (only models PST) ............................................................... 28
9 OPERATING THE PRESS .......................................................................................................... 29
9.1 Before use........................................................................................................................... 29
9.2 Filling of the press.............................................................................................................. 29
9.2.1 Filling the press through the hatch................................................................................. 29
9.2.2 Filling the press through the central filling connector ..................................................... 30
9.3 Selecting the pressing program ........................................................................................ 32

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9.4 Discharging the press ........................................................................................................ 33
10 CLEANING OF THE PRESS.................................................................................................... 34
10.1 Cleaning of the drum interior............................................................................................. 34
10.2 Cleaning the drain channels (PST models) ...................................................................... 35
10.2.1 The draining channel dismounting procedure:............................................................... 35
10.2.2 Reassembly of the draining channels............................................................................ 36
10.3 Cleaning the drain channels without removing them (optional for PST models).......... 37
10.3.1 Channel cleaning hose (length: 3 m). ............................................................................ 37
10.4 Cleaning of the external parts of the press ...................................................................... 37
11 MAINTENANCE....................................................................................................................... 38
11.1 Removing humidity from the space between the drum and the membrane .................. 38
11.2 Checking of the drum rotation chain ................................................................................ 38
11.3 Membrane ........................................................................................................................... 39
11.4 Maintenance of the compressor........................................................................................ 40
11.5 Maintenace of the relief valve............................................................................................ 40
11.6 After the end of the vintage season .................................................................................. 40
11.7 Care and maintenence of stainless steel eqipment ......................................................... 41
11.8 Spare parts.......................................................................................................................... 43
12 CORRECTING ERRORS......................................................................................................... 43
Attachments:
- AV Automatics (Description and operating instructions)
- Electric scheme
- Instructions for use and maintenance of the compressor (provided by the compressor
manufacturer)
- Declaration of conformity
- Warranty declaration

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1 INTRODUCTION
We thank you for your trust, which you demonstrated by purchasing our pneumatic press.
In order for it to be used successfully and for a long period we ask you to follow the instructions and
warnings for a safe and proper use.
The instructions are intended for the operator and they should always be kept at hand. They describe
correct and safe use of the pneumatic presses series L model PSP_ and model PST_
21/29/42/55. As they cover different press types, they may describe functions and features not fitted in
your particular press.
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Read the instructions carefully before:
- Unloading and installing the press
- Connecting the press to electricity
- Start of use
- Maintenance work
In the case of any doubt and/or need for additional information, please contact the
manufacturer or his representative.
IDENTIFICATION STICKER
On one leg of the press there is an identification sticker with
basic information on the press characteristics (serial number,
drum capacity, type of the press, technical data, year of
production …).
In case you need any additional information, spare parts or
service, always provide the data from the identification
sticker.
2 PURPOSE OF PNEUMATIC PRESS
Pneumatic presses are only designed for pressing grapes and lees. Use the press only for the
purposes intended and approved by the manufacturer.
In the case you intend to apply the press for any other purpose, consult the manufacturer prior to such
application. We cannot be held liable for any problems, damages, deformations, risks … that may
arise due to the application of the press for any purposes not explicitly approved by the manufacturer.
3 GUARANTEE
See the guarantee declaration.
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The press manufacturer, Škrlj d.o.o., does not accept any liability for damages caused by
failure to observe instructions in this manual. Furthermore, we reject any liability for
damages caused by improper application of the machine and its accessories.
In the case of use for purposes not intended, failure to observe the instructions in this
manual or any tampering with the machine by non-authorised persons, the manufacturer's
guarantee becomes void.

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4 HEALTH AND SAFETY
4.1 Meaning of the symbols
In the instructions following symbols are used to warn the user against danger or special attention:
Symbol Designation Meaning
DANGER Danger because of the electric current!
DANGER Danger because of the moving parts of the machine!
WARNING General instruction, recommendation, forbiddance…!
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IMPORTANT INFORMATION Information that demands special attention!
4.2 GENERAL SAFETY PRECAUTIONS
Due to its moving parts and to the pressure in the drum, the pneumatic press may be a threat to its
environment. Therefore, strictly observe safety precautions when operating the press. Unqualified and
unauthorized person is not allowed to use the press.
In a case of any unauthorised tampering with the machine, the manufacturer's guarantee becomes
void; furthermore, any unprofessional repairs may result in danger for the machine operator.
Disconnect the press from the mains power ALWAYS:
when it is not in use;
before any intervention in the machine
during the cleaning, control and maintenance procedure
in case of a damaged electrical cable
before opening the electric panel;
in case of any danger
In case of any danger stop the press by pressing the emergency STOP button or
with the safety cord.
Before any intervention in the machine make sure that:
the press is disconnected from network
the main switch of the press is in position OFF
The drum is not pressurised.
Opening of the hatch during the press operation is explicitly forbidden.
The hatch may only be opened for the filling the drum, for the discharging, for cleaning
purposes and for maintenance works in the press drum.
Before opening the hatch manually, disconnect the press and turn the main switch OFF.
Before entering the drum, secure the door against unintentional closing.
Do not reach in the space between the drum and the press frame. Danger of
squeezing!
This space is secured with a safety cord. The tension and position of the safety cord must
be checked before every use of the press.

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Once a year, the screws that connect the membrane to the drum frame must be tightened.
Before that, disconnect the press from the mains supply. The hatch should be open and
protected against inadvertent closing.
When filling with the pump, be careful not to exceed the limit pressure value in the drum.
You must stop the pump as soon as you hear the acoustic signal, in order to reduce the
pressure. Disregarding this instruction can lead to serious damage of the drum.
When filling the press, the recommended filling capacity should be observed (see chapter
9.2 Filling of the press).
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The press drum is subject to the requirements laid down in the pressure equipment
directive (Official gazette of Slovenia, 15/2002; directive ES 97/23/EC). After setting up the
press, the producer has performed acceptance examination with the initial pressure test.
The user has to consider all the directives, that are in force in the country where the press
is operating. The user must also make sure that all the periodical tests according to this
directive are done.
4.3 SAFETY DEVICES
The press is equipped with safety devices which ensure safe work and undisturbed operation of the
press.
4.3.1 Emergency STOP button
When you push the emergency STOP button (the red button on the control
panel), the press immediately stops its operation.
Never use the emergency STOP to interrupt the grapepress normal running.
emergency
STOP button

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4.3.2 Safety cord
The space between the drum and the press frame is protected by a red safety cord. Any significant
vibration or pulling on the cord triggers a micro switch, which in turn immediately stops the press.
Always check the safety cord tension and position prior to operating the press. If the safety cord is not
installed or its tension is incorrect, the press will not function.
The safety cord runs along the internal edge of
the press frame. It is connected to the S4 micro
switch. The cord tension is proper when the end
of the black indicator is approximately in the
middle of the green strip, and the blue button
pulled out to show the green strip beneath it.
The cord tension is set by means of the screw at
the cord end. Any pulling on the cord triggers
automatic immediate stopping of the press.
press is displayed.
The blue button drops.
The press switches to a standstill.
Prior to resuming the press operation, determine
and remedy the trouble that caused the press to
stop.
To resume the press operation, lift the blue button
on the micro switch so as to show the green strip
underneath it.
Start the press by means of the green button on
the command panel and resume the cancelled
pressing programme.
mikroswitch S4
blue button -
dropped
green strip
black indicator
blue button -
lifted
green strip visible

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4.3.3 Protection against overpressure in the drum
Following safety systems are used:
1 Maximum pressure that can be achieved with the compressor is limited to 1.5 bar
(by some executions maximum pressure is 1.8 bar).
2
In a case the pressure is exceeded (e.g. due to a valve
fault), the vacuum pump valve and the safety valve
automatically open at 2.0 bar, to release air from the drum
and to decrease the pressure to the allowed level.
3
Presses with axial filling can also be equipped with a
sound alarm. The alarm is triggered if the pressure is
exceeded or the press is overfilled.
Make sure that you don't exceed the max. pressure
allowed douring the filling of the press.
In case the sound signal is activated, stop the filling pump
immediately.
4.3.4 Overload relays
The press has two overload relays (F1 and F2),
which are located in electric cabinet.
Use the supplied key to open and close the electric
box (upon delivery it is fixed on the cable below the
box).
The overload relay is activated in case of overloading, overheating or any
other trouble with the electromotor or compressor.
The overload relay F1 protects the drum rotation electromotor.
the overload relay F2 protects the compressor electromotor
By pressing the black button, the overload relay is reset.
ATTENTION:
Before resetting the overload relay, make sure that the problem that
caused the activation of the relay has been corrected/fixed.
Overload relays
safety valve
Sound
alarm

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5 PRESS TRANSPORT AND SETTING UP
5.1 Transport of the press
Transportation, unloading and lifting may only be done by skilled personnel.
The manufacturer shall not be kept liable for any personal injuries or material damages resulting
from disregarding safety regulations applicable to the transportation, unloading, lifting…
During lifting and manipulating the press, no person shall move or stay below the hoisted
load or within the operating range of the crane.
To hoist and transport the press, always apply the openings/hoisting eyes provided on the press for
this purpose.
The PSP/PST_21 and 29 size presses are fitted with four
hoisting openings in the hatch brackets (one opening on each
bracket). Attach the hoisting strap or lined steel rope hooks in
these openings.
The larger models are fitted with special lifting lugs located on
both ends of the drum.
Attach the hoisting strap or lined steel rope hooks in these
openings.
When you place the press or before
activating the press obligatory dismount
both lifting lugs.
Unscrew both screws fixing the lug to the
drum and remove the lug.
Store them in a safe place, as you may
need them later to transport the press again.
To unload and transport the press, apply appropriate lifting equipment (forklift, lift) and hoisting straps
or lined steel ropes. Make sure the strap/rope load bearing capacity is adequate for the press weight.
Designation PSP 21 PST 21 PSP 29 PST 29 PSP 42 PST 42 PSP 55 PST 55
M (mass) kg
810 1120 1800 2200
The strap/rope length shall be such as to carry the press in horizontal position during lifting. The
distance between the drum and the hook of the lift must be at least 1.5 m. Otherwise you must use
apropriate bracket to prevent the hatch brackets bending.
Attach the strap/rope hooks into the hoisting openings on the press. Hang both slings of the hoisting
straps/ropes on the lifting device hook and carefully lift the press. Make sure the load is balanced and
then lower the press, slowly and avoiding unnecessary oscillations, onto the intended position.
hoisting opening in t
he hatch
bracket

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5.2 Mounting and storage of the press
Pneumatic press is delivered wrapped in foil. The foil must be removed immediately after delivery.
Otherwise, effects of weather factors (exposure to strong sun radiation etc.) may hinder complete and
neat removal of the foil.
Place the press into a dry and vented space on a level floor. Protect it from dust and
direct sunlight. Excessive temperature can harm the controller and cause controller
malfunction.
Wheels:
PS_21 and PS_29 series presses have factory
installed wheels (two steerable wheels with a brake and
two fixed wheels).
For PS_42 and PS_55 series presses, these wheels
are optional.
By using the wheels, move the press to the foreseen
position.
Two of the wheels are fitted with a break pedal.
Wheel - brake activated
Wheel - brake released
The wheels of the press are exclusively
intended for moving an the press on a level
ground, never on a street paving or uneven
ground.