double safety - metalwork.it inglese w.pdf · the aim of this document is to explain unequivocally...

DOUBLE SAFETY

19

DOUBLE SAFETY

DOUBLE SAFETY

18

DOUBLE SAFETY

1

INSTALLATION, USE AND MAINTENANCE INSTRUCTIONS

GENERAL

The aim of this document is to explain unequivocally how to use the ONE DOUBLE SAFETY (referred to below as the ODS module) as a safety component in pneumatic systems. It is specifically designed for the sole purposes of cutting off the compressed air supply preventing re-pressurisation of the circuits without a specific command, ensuring that there is no residual pressure in the circuits of the machine or system of which it is a part, in accordance with the following instructions for installing the compressed air and the electrical systems.

N.B. The sectioning function must be provided for separately by means of a hand-operated valve at the entrance to the system.

It is extremely important to read and understand the following instructions before starting to use the safety component. Improper use, or failure to comply with the instructions will render all forms of warranty null and void and is also likely to expose personnel to potential risks.

This document must be read thoroughly by the fitter first of all, and subsequently by all personnel involved in control-ling, regulating and servicing (replacing worn or faulty parts) operations connected with production and servicing.

Main technical features of the ODS module. All the electrical and pneumatic components used undergo rigorous testing.•A very high degree of filtration is guaranteed by the presence of two cartridges in series.•The ODS module has two pressure switches and two relief solenoid valves in series to provide a further guar-•antee of efficient operation at the control, cut off and relief stages.

DOUBLE SAFETY

2

HANDLEDNING

DESCRIPTION OF THE PRODUCTAND THE COMPONENT PARTS

The first unit of the ODS module has a hand-operated control signal cut-off valve in series with the solenoid •valve to allow manual reset if necessary. Operation of the pressure switches is monitored constantly by two pc boards that have LEDs displaying the •current status. The circuit after the ODS module is pressurised gradually, depending on the setting on the progressive •starter.

Two further considerations should be taken into account by anyone using the ODS module although all qualified servicers should be aware of them already.

Before performing lengthy maintenance operations or disassembling parts of machinery or plant, it is neces-sary to cut off the sources of power by means of sectioning. With pneumatic circuits, this may means cutting off the compressed air supply using hand-operated valves on the main (power) circuits, or disconnecting any plugs. All this is independent of the functions of the ODS module.

As regards the dissipation of accumulated energy, as the ODS module cuts off the supply (valves V1 and V2) it releases compressed air from the circuit. This is an essential function required by EN 1037 and EN 983 (automatic relief in the event of a shutdown).

N.B. As part of its policy of continuous improvements, Metal Work S.p.A. has applied for Vision 2000 Quality Certification, (project code 431) for the ODS module.

If this handbook is incomplete or you cannot understand any of the following explanations or something is not completely clear, please contact your own dealer or phone the Manufacturer’s Engineering Office on ………..

The ONE DOUBLE SAFETY is comprised of two physically similar interconnected components, arranged in series to guarantee a condition of redundancy for the components required for Category 4 classification of the ODS module for the functions of cut-off on an electrical signal and relief of pressure from the circuit downstream of the module.

N.B. IMPORTANT: use of the ODS module in plant or machinery requiring classification in CATEGORY 4 under UNI EN 954-1 is only permitted if the fitter follows the rules on pneumatic assembly and electrical con-nections contained in this handbook. Even if this is not the case, the product guarantees a lower safety level, but still high. Please remember that the safety function provided under CATEGORY 4 concerns cut-off on the electric signal and pressure relief of the circuit downstream of the ODS module.

First of al, we wish to provide you with the information required to classify all the external components with direct access for regulation, maintenance or replacement operations. The two elements comprising the ODS module are described below.

DOUBLE SAFETY

3

65

12

1

2

9

7

83

4

11

13

10

1

2

3

ELEMENT 1

Figure A – Description of the outside

Below is a technical description of the main components.

Inlet fittingThe point of connection to the ODS module supply.The thread is available in various sizes (1/4” – 3/8” – 1/2” – 3/4” – 1”). The fitting can be rotated.

Filter-clogged optical indicatorIf the filter becomes so clogged as to affect operation of the ODS module, the indicator comes out to highlight the situation. It remains in this position as long as there is a difference of about 1.5 bar between the inlet and outlet pressures.

Access to the filter cartridgeThis part is comprised of a support for the nylon fibre cartridge. The support can be unscrewed and removed. It holds back any impurities in the compressed air that would be conveyed to the ODS module. When the car-tridge and its support are removed, an automatic valve cuts off the compressed air supply, so sectioning upstream and downstream of the ODS module is not necessary. The direction of flow of the air is such that it keeps the separated parts inside the cartridge. The maximum torque for the support is 6 Nm. An 8 mm socket spanner can be used.

The filter cartridges has two degrees of filtration, depending on how clean you want the air. For 5 µm filtration -- > product code 9251720For 20 µm filtration -- > product code 9251721

Each type of cartridge has its own cap. The spare parts codes (cap + filter cartridge) are as follows: For 5 µm filtration -- > product code 9251723For 20 µm filtration -- > product code 9251724

The optical filter described earlier (ref. 2) shows when the filter is clogged.

N.B. It is important to check the filter at least once a week. This should be done by the person servicing the pneumatic system.

DOUBLE SAFETY

4

4

7

6

5

8

Pressure regulatorThe pressure of the compressed air leaving the ODS module can be set on the external hand-operated knob. Pull the knob out, and turn clockwise to reduce the pressure. This means outlet P ≤ inlet P. The pressure value can be read on the gauge (ref. 11). The pressure regulator does not normally require any maintenance, but in case of need the reference code is 9259820 for operating pressure in the range 0.5-2 bar, 9250821 in the range 0.5-4 bar, 9250822 in the range 0.5-8 bar. When you have set the pressure, lock the knob by pressing.

N.B. When setting the pressure on the regulators, start from a lower value and increase gradually to the desired value.

V3V electric valve with manual circuit breakerCIRCUIT BREAKER. This is an ON/OFF switch. It is used to cut off manually the compressed air supply to the whole system after the ODS module. It can be padlocked. Only an authorised person in possession of the key can reactivate it. When the valve is ON, the ODS module feeds the downstream circuit; with the valve OFF, the compressed air supply is cut off and the downstream circuit is depressurised completely. VALVE. When powered on (….) it allows the pressure signal to be sent, and the ODS module powers on the utilities. When powered off, it prevents the pressure signal from being sent, so the compressed air supply if cut off and the circuit downstream of the ODS module is depressurised. The combination of the two functions operated in series by the CIRCUIT BREAKER and the VALVE means that the ODS module can only feed the downstream circuit when both the power supply and the circuit breaker are ON.

The manual circuit breaker can be locked in position by means of a padlock. This prevents the downstream circuit from pressurising during maintenance operations. The key to the padlock must be kept by an authorised person.

N.B. If a V3V or an electric progressive starter is present, the compressed air supply only activates if the power supply is ON. ca.

Manual solenoid valve controlThe valve can be opened even when the power supply is off by inserting a sharp instrument in the hole (near TEST) in the safety guard. The button is the monostable type: when it is released, it returns to the closed position, cutting off the pneumatic signal.

Progressive starter regulatorThis knob is used to regulate the progressive starter. When the pressure has reached 30-40% of the set value, the valve opens completely and the pressure rises rapidly. To regulate the rate of increase, pull out the grey knob. In the out (stable) position, it can be turned towards Slow to increase or Quick to decrease the rate of increase. When the knob is turned fully towards Quick, the valve opens at the maximum rate, thereby inhibiting the progressive starter.After regulating, press the knob to lock it in position.

Pressure switch regulatorThis knob is used to regulate the value at which the pressure switch activates. To regulate the value, pull out the knob. In the out (stable) position, it can be turned clockwise (+) to increase the value, or anticlockwise (-) to reduce the value. Proceed as follows to obtain a correct setting:

Turn the knob anticlockwise (-) as far as it will go. •On the pressure regulator knob (ref. 4), set the desired ODS module outlet pressure and check the reading •on the gauge.In this condition, the NO light is ON and the NC LED is OFF.•Turn the knob until the two lights invert.•Press the knob in to lock it in position.•Reset the pressure regulator to the normal operating pressure. •

DOUBLE SAFETY

5

11

10

9

12

13

Indicator lightsThese three indicator lights (LEDs) display the status of the ODS module (ON – green), a pressure below the pres-sure switch cut-in threshold (NC – red) and a pressure higher than the threshold (NO – yellow). When the ODS is active, two of these three lights must be ON. Refer to the data sheet for the various cases and their meanings.

M12x1 5-pin connectorThis is used to power on the module for its internal monitoring functions, establish connections with the electrical part of the pressure switch and provide signals for piloting the solenoid valve. Next to the connector is a diagram showing the function of each point of connection. To help you, the diagram is reproduced below. The connector’s electrical parameters are as follows:

For contacts 1-2 and 1-3 Maximum voltage = 30 V Resistive load = 5 A Inductive load = 3 A

For contacts 4 and 5 Supply voltage = 0-24 V

The electrical connector has 5 leads of the following colours.1 = brown2 = white3 = blue4 = black5 = grey

Pressure gaugeThe pressure gauge indicates the pressure set on the regulator, the reading being constant regardless of the inlet pressure. The accuracy of the reading is relative, and the scale has 0.5 bar graduations.

G1/4” air relief valve with silencerThis valve relieves air from the circuit after the ODS module, which activates when: the valve is closed by means of the manual V3V valve cut-off;the power supply to the V3V or progressive starter valve is cut off; the pressure in the circuit after the ODS module exceeds the value set on the regulator. Clearly, the relief valve must never be blocked and it must be checked at least once a month. This can be done by operating the manual cut-off lever (rif 5).

Condensate outletThe automatic drainage system empties the bowl when the level of liquid reaches the point of intervention of the float.Do not obstruct the outlet. The outlet should be activated manually at least once a month. Operate the lever (ref. 5) to cut off the compressed air supply, unscrew the locking ring and press inwards the end of outlet . The tighten the ring nut.

Below are the internal parts that are not visible as they are covered by the guard. To gain access to them, remove the six screws [A] (with a TORXX screwdriver.), remove the two grey knobs [B] (ref. 7 and 8) by pulling out firmly, and loosen and remove the ring nut of the pressure regulator [C] and the support of the filter cartridge [D]. See diagram below. The guard [E] must be slightly open to allow you to get past the outlet (ref. 12).Then reassemble everything in the reverse order.

DOUBLE SAFETY

6

15

16

14

15

16

14

C

B A

ED

Figure B – Elements that have to be removed to take off the front guard

Figure C – Identifying the concealed parts

Solenoid valvePower 1.2 VSupply voltage 24 V DC

Pressure switch

Wiring diagram

ELEMENT 2

Element 2 differs from element 1 in that it does not have a hand-operated circuit breaker or a progressive starter. The diagrams in this handbook show element 2 with a regulator, but this part may be removed in the future. This will not, however, affect the overall safety of the ODS module.

N.B. All the components described previously are of a high standard of quality and have undergone tests of various kinds (by Metal Work or the contractors) to guarantee the utmost reliability and compliance with the applicable safety standards.

DOUBLE SAFETY

7

TECHNICAL FEATURES

bar

Nl/min0 2500500 1000 1500 2000

1

2

3

4

5

6

0.5

0

1.5

2.5

3.5

4.5

5.5

6.5

psi

70.7

scfm

0 60 804020

60

70

80

90

100

0

10

20

30

40

50

MPa

0

0.1

0.2

0.3

0.4

0.5

0.6

0

1

500Nl/min

bar

1000 1500 2000 2500 3000 3500

2

3

4

5

6

0.5

1.5

2.5

3.5

4.5

5.5

6.5

0

12040 10060 80200

scfm

psi

0.7

60

70

80

90

100

0

10

20

30

40

50

MPa

0

0.1

0.2

0.3

0.4

0.5

0.6

7

The main technical features of the ODS module are given below.

1/4” 3/8” PRESENT PRESSURE PRESENT PRESSURE Pm= 8 bar - 0.8MPa - 116 psi Pm= 8 bar - 0.8MPa - 116 psi

Flow rate at 6.3 bar (0.6 Mpa; 91 psi) ˘P 0.5 bar (0.05 Mpa; 7 psi) Nl/minscfm

Flow rate at 6.3 bar (0.6 Mpa; 91 psi) ˘P 1 bar (0.1 Mpa; 14 psi) Nl/minscfm

Flow rate on discharge at 6 bar (0.1 Mpa; 14 psi) Nl/minscfm

1/4 port flow rate of non-regulated filtered air Nl/minat 6.3 bar (0.6 Mpa; 91 psi) ˘P 1 bar scfm

*Flow rate of each supplementary 1/4 filtered Nl/minand regulated air port at 6.3 bar (0.6 Mpa; 91 psi) ˘P 1 bar scfmFluid Setting range barDegree of filtrationMaximum inlet pressureOperating temperature range ¡C

¡FClass of protectionInsulation class of the solenoid valveSwitching timeElectrical connectorSolenoid valve power WSolenoid valve voltage VPressure interval settable on the pressure switch barPressure switch hysteresis (not adjustable) barMaximum pressure switch current AMaximum pressure switch voltage VPressure switch contactsNumber of switchingWeight kgWall fixing (max. panel thickness 10 mm):

Mounting positionDirection of flow

* total flow rate from two supplementary outlets and the main one cannot exceed4000 Nl/min at 6.3 bar with ˘P=1

1/4 3/8 1/2 3/4 1TECHNICAL DATA

2200 2900 360078 102 127

2400 3300 400085 116 141

160056

180064

240085

compressed air0,5 2 0,5 4 0,5 8

5 m or 20 m10 bar — 1 Mpa — 145 psi

-10¡ 50¡-14¡ 122¡

IP 65 with connectorF155

100% EDM12 x 1.5-pin to CEI IEC 60947-5-2

1,224 VDC– 10%

0,5 10bar 0,4 to 0,8 (see diagram)

0,53 30 AC/DC

normally open (NO) and normally closed (NC)5 x 106

from 1,15 to 1,25 according to configurationsFront, with M5 x 75 screws or back, with M6 x 70 screws

The screws are included in the supplyvertical

from left to right

DOUBLE SAFETY

8

INSTALLATION AND USE GENERAL

10 MAX 10 MAX

1. At the front, with M5x75 screws.The supply includes:2 screws M5x752 washers 5x102 nuts M5

2. At the rear, with M6x70 screwsThe supply includes:2 screws M6x702 washers 6x12,5(the M6 nuts are included in the group)

3. PanelIn this case the kit of “panel mounting brackets” must be purchasedCode 9200702

bar

1

2

3

4

5

6

0.5

1.5

2.5

3.5

4.5

5.5

6.5

0

0 4000 4500500 1000 1500 2000 2500 3000 3500Nl/min

40 10060 80200

scfm

120 140

psi

0.7

60

70

80

90

100

0

10

20

30

40

50

MPa

0

0.1

0.2

0.3

0.4

0.5

0 .6

7

1/2” - 3/4” - 1” PRESSURE SWITCHPRESENT PRESSUREPm= 8 bar - 0.8MPa - 116 psi

Table 1: Main technical features

Fixing – the two elements making up the ODS module can be fixed securely in position.

DOUBLE SAFETY

9

PNEUMATIC CONNECTION

ONE has been designed to treat compressed air. No other fluid can be used without express authorisation by Metal Work.It is preferable to use UNLUBRICATED air. If there are devices requiring lubrication, it is advisable to install the lubricator downstream ONE as close as possible to the devices invol-ved.

Connect the ports to the thread by rotating the fitting or ONE’s rotary threaded port as most appropriate (A).Do not subject the unit to transversal stresses or tilting torques that may damage it (B).

Fluid – The • ODS module is designed for use with compressed air.

Connecting to the threaded ports – Turn whichever is easier, the fitting or the rotating threadedport•

Additional air intakes on ELEMENT 2 only •

N.B. The additional air intakes on Element 1 have been closed off with plugs and an adhesive covering. This is because they are not subject to control by the ODS module and they must not be used.

DOUBLE SAFETY

10

ELECTRICAL CONNECTION

RECOMMENDATIONS REGARDING THE ELECTRICAL SYSTEM

Wiring diagram

To guarantee the Category 4 reliability, it is necessary to activate a monitoring function in accordance with the fol-lowing instructions.

At a control logic level, it is necessary to implement monitoring functions to detect failures in order to guarantee the required Category. To do this, the following procedure must be performed during stopping and during restart.

DURING STOPPING

Y1 = OFF Pressure switch signal S1 = S2 = 0 Y2 = OFF

If different, confirm stop and activate the error signal on the diagnostic.

DURING RESTART

Activate a timed restart sequence for correct Y2 switching.

Y1 = ON Pressure switch signal S1 = nominal pressure Pressure switch signal S2 = 0

5-SECOND DELAY

Y2 = ON Pressure switch signal S1 = nominal pressure Pressure switch signal S2 = nominal pressure

If different, confirm stop and activate the error signal on the diagnostic.

DOUBLE SAFETY

11

RECOMMENDATIONS REGARDING THE PNEUMATIC CIRCUIT

CHECKING THE LEDSAND ELECTRICAL CARD

The following points refer to general safety criteria for pneumatic circuits according to EN 983.

Relieving pressure in the circuit downstream of the module does not guarantee the absence of air locks. This •depends on the layout of the circuit and the type of valves used. Automatic air relief by the ODS module may cause hazardous movements connected with depressurisation, •again depending on the type of valves and actuators in the downstream circuit. In connection with the stop function, make sure the actuators governed by two-position valves determine situ-•ations that generate movements that cannot be stopped until the limit switch has been reached. Care must be taken over the configuration of the downstream system to prevent hazardous movements oc-•curring as the circuits pressurise (this depends on the state and type of valves used).

When powering on the ODS module, check that four of the six indicator lights come on, two for each element. If this is not case, check the following cable to determine the problem and implement the necessary corrective action.

LED STATUS TYPE OF FAILURE CORRECTIVE ACTION RESULT

NO LED ON No electrical connection Check the connection and the power supply

After intervention by the electrician:If 2 + 2 LEDs on = OK•If otherwise = see below•

Only one LED onon Element 1

of the ODS module

At least one LED faultyon Element 1

Power off or faulty card on Element 2

Replace card on Element 1 Restore power or

replace card on Element 2

After intervention by the electrician:If 2 + 2 LEDs on = OK•If otherwise = repeat check and replace •cards, check supply voltage

Only one LED onon Element 2

of the ODS module


Power off or faulty card on Element 1

Replace card on Element 2Restore power

or replace card on Element 1

After intervention by the electrician:If 2 + 2 LEDs on = OK•If otherwise = repeat check and replace •cards, check supply voltage

Two LEDs onon Element 1,

none on Element 2

Element 1of the ODS module = OKPower off or faulty card

on Element 2

Restore power or replace card on Element 2

After intervention by the electrician:If 2 + 2 LEDs on = OK•If 2+1 LEDs on (only one LED on Element 2) = •card faulty, repeat replacement


none on Element 1

Element 1of the ODS module = OKPower off or faulty card

on Element 1

Restore power or replace card on Element 1



only one LED on on Element 2

Element 1of the ODS module = OK


Replace card on Element 2



only one LED on on Element 1

Element 1of the ODS module = OK


Replace card on Element 1



Element 2 or both

Faulty card(s) Replace card of the faulty element

After intervention by the electrician:If 2 + 2 LEDs on = OK•If 3 LEDs on one or both Elements = card(s) •faulty, repeat replacement

DOUBLE SAFETY

12

SCHEDULED CHECKS

ROUTINE MAINTENANCE

EXTRAORDINARYMAINTENANCE

PROBLEM CAUSE REMEDY1.1 – The regulator releases air from the air outlet.

Pressure downstream of the regulator higher than the set value.

Wait for the pressures to equalize, then air release will stop.

1.2 – The pilot regulator releases air through the relief valve.

The pilot regulator controls the air escaping, which can be heard clearly.

Normal condition for the type of regulator used on the ODS module.

1.3 – The regulator cannot set the desired pressure.

The ODS module input pressure is less than the set value. The rated pressure of the ODS module is too low, The rate of air flow required by the system is too high compared to the features of the ODS module.

Adjust the pressure value.Check the features of the ODS module.Check in the catalogue the features of the pressure/flow graph of the ODS module.

1.4 – Fine adjustment not possible.

Rated pressure of the ODS module too high.

Replace the ODS module with another having more suitable features.

1.5 – After taking air, the pressure is less than the value set previously.

The ODS module has been wrongly set in descent (from high to low pressure)

Correct use of the ODS module requires setting pressure in ascent (from low to high pressure).

1.6 – The knob on the pressure regulator will not turn.

The knob is in the lock position Pull the knob out to release. Then make the adjustment and press the knob in to lock it.

The table below sets out the time schedule for checking the functions of some of the components of the ODS module . The technical (service) personnel of the company where the ODS module is installed are responsible for carrying out these checks. The fitter will supply the person in charge with this accompanying documentation.

Intervention Frequency ActionChecking the efficiency of the

electric V3V valve Monthly Switch off the power supply and check that compressed air is released

Checking the manual cut-off switch on the V3V valve Monthly Turn the lever to OFF and check that

compressed air is released

Table 2: Scheduled checks

No specific maintenance is required except for replacement of the filter cartridges when they are partially clogged. This is indicated visually by the optical indicator (ref. 2). See pages 2 and 3 for replacement instructions.

The table below summarises the most likely faults or failures and immediate remedies that can be taken. If you are unable to solve the problem, please contact your dealer.

REGULATORS

DOUBLE SAFETY

13

PROBLEM CAUSE REMEDY2.1 – Automatic condensate discharge does not occur.

The float has jammed. Release by hand (turning the ring nut and pressing the header upwards), then restore the pre-existing condition.

2.2 – Gradual reduction of the rate of flow.

Blockage of the filter cartridge. Do not attempt to clean the cartridge. Replace it with an original spare cartridge of similar features.

PROBLEM CAUSE REMEDY3.1 – The pressure switch activates too frequently.

The set value is too close to the ODS module input pressure value.

Reduce the value the value at which the pressure switch activates.



PROBLEM CAUSE REMEDY4.1 – No power downstream of the ODS module.

The circuit breaker lever is in the OFF position. No solenoid valve control signal.

Move the lever to the ON position.

Check there is a signal. If there is, check the connections and the efficiency of the coil. Replace the solenoid valve if necessary.

4.2 – The ODS module feed pressure continues to drop.

The circuit breaker lever is in the OFF position.

Move the lever to the ON position.

PROBLEM CAUSE REMEDY5.1 – No compressed air supply downstream of the ODS module.

The knob is in the closed position.No electrical signal.

Adjust as required.Check the coil and replace it if necessary with an original spare.

5.2 – Progressive start-up fails (the maximum value is reached immediately)

The knob is in the open position. Adjust as required.



FILTERS

PRESSURE SWITCHES

V3V CIRCUIT BREAKER VALVE

APR PROGRESSIVE STARTERS

DOUBLE SAFETY

14

REPLACING PARTS

CHANGING A THREADED FITTING

1- Unscrew the two M4 x 45 screws (A)2- Extract the threaded port (B)3- Clean the seat of the body.4- Grease the OR seal (C) of the new threaded port.5- Insert the new threaded port.6- Re-tighten the two M4x45 screws (A), taking care not to overtighten.

REMOVING THE GUARD

The figure and the description below refer to the first element of the ODS module. The same applies to the second element.

1- Unscrew the regulator ring nut (A)2- Unscrew the filter plug (B)3- Pull out the soft start valve knob (C) and the pressure switch knob (D) taking care not to damage the small spring in the pres-sure switch. To do this, grip the knob and pull it outwards with force, helping yourself by pushing sideways.4- Unscrew the silencer on the exhaust (E)5- Remove the 1/4” A7 plugs (F) or any fittings mounted from the supplementary outputs.6- Unscrew the 2+2+2 screws (G) on the three sides of the guard.7- Remove the guard (H) by pulling it from the front.8- Remount the guard following the above operations in the reverse order.

DOUBLE SAFETY

15

REPLACING THE PRESSURE GAUGE

1- Remove the guard2- Unscrew the pressure gauge (A)3- Apply some removable sealant on the thread of the spare pressure gauge (B), for example Loctite® 242E or 542.4- Screw on the new pressure gauge, making sure the markings are horizontal. 5- Remount the guard.

REPLACING THE PILOT REGULATOR

1- Remove the guard.2- Remove the regulator knob (A)3- Unscrew the bell (B) using the key provided4- Remove all the components for the pilot regulator (C) 5- If you wish to replace the poppet as well, unscrew the 2 screws (E) and remove the poppet presser (D) and poppet (F).6- Remount the new parts with great care.7- Remount the guard.

DOUBLE SAFETY

16

REPLACING THE SOLENOID VALVE

1- Remove the guard2- Unscrew the 2 screws in the solenoid valve (A)3- Replace the solenoid valve (B), taking care that the gasket (C) seats correctly in position. If necessary, wet the gasket or oil it slightly. 4- Remount the guard

REPLACING THE PRESSURE SWITCH

1- Remove the guard2- Unscrew the 2 screws in the pressure switch (A)3- Remove the pressure gauge (B)4- Remove the clear cover of the electronic board (C) unscrewing the screw at the back (D). There will be some sealant that can be easily removed 5- If you wish to replace the board as well, unscrew the 2 screws (E) securing the M12x1 connector and extract the board6- Disconnect the pressure switch connector on the electronic board7- Mount the new pressure switch in the reverse order. Grease the OR seal of the valve 8- To get the class of protection IP65, it is necessary to apply new sealant where the existing sealant is damaged. A silicon sealant can be used for this purpose 9- Remount the guard10- Calibrate the new pressure switch, following the instructions given above

NB: during the disassembly stage it’s probable that the gauge gets damaged. Buy one as spare part before effecting the replacement of the gauge

DOUBLE SAFETY

17

DISPOSING OF ALL orPART OF THE ODS MODULE

LIST OF PROHIBITIONS

The component parts of the ODS module, such as gaskets, solenoid valve, pressure gauge and LEDs, and the frame itself must be disposed of in accordance with the applicable legislation of the country of instal-lation. Sort the parts into materials (iron, plastic, etc.) and consign them to a qualified waste disposal firm. It is important for waste to be disposed of only by a duly authorised firm in compliance with the applicable regulations.

NEVER:

perform maintenance or repairs with the power and compressed air supplies on;•use the • ODS module in a poorly lit place,install the • ODS module other than following the procedure described above; mount spare parts or accessories that are not supplied or authorised by Metal Work S.p.A.; •use the• ODS module for functions not specified in the handbook; use the • ODS module at values higher than those set out in the specifications in this handbook, or at an input pressure of more than 8 [bar];allow incompetent or untrained personnel to install, use, regulate or service the • ODS module;by-pass or tamper with the safety devices;•modify the original parts of the • ODS module;(with a padlocked control) leave the key in the lock unattended; •use currents and voltages that differ from the ratings.•

Viktigt: denna handbok som innehåller informationer, beskrivningar och regler för ODS modulen,måste medfölja modulen i hela dess livslängd. Om handboken är ofullständig eller skadad, kan användaren beställa en ny kopia från Metal Work.

DOUBLE SAFETY

20

double safety - metalwork.it inglese w.pdf · the aim of this document is to explain unequivocally...

Documents