4_purge unit technical documentation

7/22/2019 4_Purge Unit Technical Documentation

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An der Hartbrcke 8D-64625 Bensheim

Tel.: 06251/63736FAX: 06251/63729

client order number code motor system number sheet no. of sheets

VEM 45089428 1 34

title

TECHNICAL DOCUMENTATION Ex p SYSTEM F-361.C4

for purge volume 200 up to 450 Nm/hdate of change revision originator format Ident.-no. file

Reinig A4 vem45089428c4e.doc

Rev. originator: release:

originate (date / sign) checked: (date / sign) release: (date / sign )

06.12.2008 Bachmann

Technicaldocumentation

EExxppssyysstteemmffoorrmmoottoorrooppeerraattiioonniinnEExx--aarreeaass


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45089428 Description Ex-p System F-361.C4

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Description of Ex p system F-361.C4

Principle of pressurizing system

To operate motors in hazardous areas some especially requirements are needed forthe electrical and mechanical equipment.On the base of the Ex-protection p, internal overpressure, motors can operate inthese areas. For this the cabinets of the motors should be sealed in a way that theleakage of compressed air is very low. Furthermore a pressure supply with sufficientair supply has to be in reserve.

The principle sequence of a safety device for a pressurizing system is shown asfollowed:

After the start of the functional sequence the air flow of the purge gas and the

thereby in the motor growing overpressure are monitored.

If a minimum of air flow streams through the motor enclosure (measure pointin the outlet valve) and a fixed motor enclosure overpressure has beenreached the purge time starts. After the purge time ran off, the motor can bestarted.

If some faults appear the control sequence is set to the start point of thefunctional sequence.

The safety device has to be combined with a main control system, whichprevents the start of the motor until the purging sequence has finished.

The EEx p pressurization system F-361.C4serves to create and maintain anoverpressure in an EEx p motor enclosure to prevent the ingress of the ambient(potentially explosive) atmosphere, according to EN 60079-2.In addition a compensation of the leakage air is realized in unique redundancycombination of a mechanical valve and electronic controlled proportional valvefor safe and reliable operation.

Motors with kind of Ex-protection EEx p can operate in combination with theEEx p system F-361.C4 in Ex areas 1 and 2 (according to ATEX 95).

Combined with an enclosure which is suitable for use with overpressure theEx protection class

II 2G Ex px IIC T4

according to EN 60079-2 can be obtained.


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Before commissioning take note of the following points:

1. Clean the connected air pipe or tubing system of the installation plant toensure that the supplied air tube is free of dirt or small parts which will causea malfunction of the purging system, if no air filter is used.

2. The internal volume of the motor enclosure must be purged with non-explosivecompressed air, to reduce a possible explosive gas concentrationto safe limits. The overpressure has to be monitored permanent.

3. After purging the motor enclosure, an overpressure must be maintained insidethe motor to prevent ambient air which can contain explosive gas.

If the pressure drops under the reference value an alarm signal is given and themotor has to be switched off.

The EEx p System F-361.C4 comprises the following components:

control cabinet ST-200C

consists of: main air valve for pressure supply, pressure reducer with gauge,purge valve, proportional valve for operating pressure (leakagecompensation), adjustment valves for purge- and leakage volume,measure points (to acquire leakage volume and the pressureinside the motor enclosure), Ex d box GUB 02,Ex d box GUB, Ex e main switch, control unit F-351.P.

Potential free signals:

PURGING IN PROGRESS START/STOP

With mounted F-369 additional signals:

PRE-ALARM MIN PRE-ALARM MAX FAILURE

The control cabinet ST-200C monitors the air flow of the outlet valve and thepressure inside the motor enclosure. Simultaneous the control automatic works inaccordance with EN 60079-2 and ATEX 94/9.

This monitoring system is a highly secure and redundancy controlling unitcertified according toEN954-1(security class Cat. 3, see certificate TV 02ATEX 1801).

Outlet valve VA-100-3HM

The outlet valve with integrated spark arrestor / particle barrier opens duringthe purging sequence to ensure the purging of the motor enclosure according


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to EN 60079-2. The outlet valve itself can be mounted in any position. Thevalve closes complete after the purging sequence.The volume flow sensor at the outlet of the valve maintains a correct purgevolume measuring in comparison to systems measuring only the air inletvolume.

Test certificate

The motor system is provided with a test certificate 2.2 according EN 10204.

Mounting example

2

Ex p motor10

1

89

543

7

B AP

6

1: control cabinet ST-200C2: two measure lines motor inside pressure3 and 4: measure points air volume

5: pilot line to outlet valve6: outlet valve VA-100-3HM7: measure points motor inside pressure8: compressed air connector for supply9: compressed air connector to motor10: motor enclosure


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Dimensions of ST-200C

600

370

air inletcable plate

air outlet

p min A B

p

50

100

17030

640

100

955

earthing point (M8)

12

1805.0

2750.5

600

800

air comp. IP55

173

277

25

25

Outlet valve VA-100-3HM

450

4 x 18 mmhole arrangement according to DIN 2527NW 100 PN 16

100.

0 200.0

50.0450

PAB

300.0

300.0

67

.5

180.0


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Internal view control cabinet ST-200C

4

1

0 6

2

3

5

1

2

3

4

5

78

9

10

1112

13

14151617

18

19

21

PE

4 6

53

4N

21

L1

53

6

PE

K3

F1

N

PE

20

23 22

K2

7

7

8

8

9

9

10

10

11

12

11

12

F-369

PE PE

6

1: control unit F-351.P 18: adjustment valve purge volume2: protection cabinet 19: test conn. pilot pressure outlet valve3: EEx d enclosure GUB 0 20: main switch

4: EEx d enclosure GUB 02 21: connector outlet valve5: Type code 22: connectors diff. pressure6: earthing terminal rail 23: connectors motor inside pressure7: cable plate8: test connector diff. pressure9: air outlet to motor10: main air connector11: main air valve12: grill panel13: pressure reducer14: adjustment valve leakage volume

15: pressure gauge16: prop. valve17: purge valve


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Technical data

1: Control unit F-351.PEx-protection class: II2G Ex mb e ia [px] [ia] IIC T4Protection class: IP 65

Temperature range: -30C ... +60CCertified by: TV02 ATEX 1801Security class: AK4, acc. to EN 954-1, cat. 3

Resolution of pressure sensors: 0,05 mbar (5 Pa)Pressure switch Purge (p): 0,3 15 mbar (30 1500 Pa)Pressure switch Min: 0,8 25 mbar (80 2500 Pa)Pressure switch Max: 10 - 25 mbar (1000 2500 Pa)

2: Protection cabinetType: ST-200CMaterial: sheet steel, 2 mm

Colour: RAL 7030Protection class: IP 55

All inside mounted modules with IP rating: IP 65

3: Control- and junction box GUB 0Ex-protection class: II 2GD EEx d IIC T6Protection class: max. IP 66Temperature range: -20C ... +55CCertified by: CESI 01 ATEX 036Bore holes: 3 x NPT, 2 x NPT

Material: Aluminium4: Control- and junction box GUB 02

Ex-protection class: II 2GD EEx d IIC T6Protection class: max. IP 66Temperature range: -20C ... +55CCertified by: CESI 01 ATEX 036Bore holes: 5 x M20, 5 x M25Material: Aluminium

Ex d cable glands FL1Ex-protection class: II 2 GD EEx d IIC T4

Temperature range: -20C ... +80CCertified by: CESI 00 ATEX 052Cable diameter: 6 12 mm (M25: 12 17 mm)

For customer: 1 x M20 and 1 x M25

5: Type plate Identification of the systemwith serial number and project data

Material: stainless steel

6: earthing terminal rail


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7: Cable plateW x H x D: 160 x 120 x 10 mmCut out in cabinet: 80 x 60 mm

8: Test connector

Differential pressure Dim. for air volumeConnector: quick disconnect coupling DN 5Material: brass

9: Air connector to motor: flange DIN 2566, C50 x 60,3ND 10-16, raw material 1.4571

10: Compressed air inlet: flange ASME B16.5 150 lbs RF 3raw material 1.4571

11: Ball valve with hand lever main air valve

Material: stainless steel

12: Breather for air compensationMaterial: stainless steel

13: Pressure regulatorInlet pressure: max. 40 barOutlet pressure: 0 6 barmax adjustment: 4 bar, before purge sequence startsMaterial: brass

14: Adjustment valve Leakage volumeAdjustment range with control valve: max. 85 Nm/h, at adjusted 3 barMaterial: stainless steel

15: Pressure gauge, glycerine filledIndication range: 0 6 barMaterial: 1.4404 (316 L)

16: Control valve Operating pressureEx-protection class: II 2 G EEx m II T4Ambient temperature: -30C ... +60CCertified by: PTB 00 ATEX 2129 XOperating range: see leakage diagramMaterial: brass

17: Purge valveEx-protection class: II 2 G EEx em II T4Temperature range: -30C ... +60CCertified by: PTB No. 00 ATEX 2129 XOperating range: max. 450 Nm/hMaterial: brass

18: Ball valve with rotating lever Adjustment purge volumeAdjustment range, if pre-pressure 3 bar: min. 200 450 Nm/hMaterial: brass, nickel-plated


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19: Test connector Pilot pressure outlet valveConnector: quick disconnect coupling DN 5Pilot pressure: approx. 1 barMaterial: brass

20: Main switchEx-protection class: II 2 G EEx ed IIC T6Temperature range: -20C ... +60CProtection class: max. IP66Certified by: PTB 01 ATEX 1105

21: Connector outlet valve Pilot line outlet valveConnection: male adapter union, tube 10 mmMaterial: stainless steel 1.4571

22: Connectors diff. pressure Differential pressure for air flowConnection: male adapter union, tube 10 mmMaterial: stainless steel 1.4571

23: Connector motor pressure motor enclosure overpressureConnection: male adapter union, tube 10 mmMaterial: stainless steel 1.4571

Electrical data

Power supply Purge Operate

230 V / 60 Hz 150 mA 125 mA

Temperature range F-361.C4

Tamb: -20C ... +55C

Weight

Control cabinet ST-200C: 88 kgOutlet valve VA-100-3H: 27 kg

Minimum requirements for air pressure

Minimum working pressure air volume: 200 450 m3/h at 3 bar / 20C

Inert gas quality acc. to DIN ISO 8573-1:

Particles Class 5/3 Particle size 40 m Particle density 5 mg/mWater Class 4 Dew point +3C Water content 6000 mg/ mOil Class 3 Oil concentration 1 mg/m

If the air quality is not guaranteed special filters can be delivered on inquiry.


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Basicfunctional description F-351, execution P

For a detailed description see manual F-350.

PE L NIN

+ -(DC) +

OUTL

- (DC)

N PE VALVEK1

INFO

OK

MENU

cable glands

3-line Display

pneumatic connectorsdifferential pressure, enclosure overpressure

terminal rail

OK/INFO button and Wheel Shuttle

safety glas

1(-)3

2(+)

1 2 3 4 5 6 7 8 9 10

PneumaticconnectorsInstalled with tubes to the cabinet wallDigital display3-line display with each 12 charactars showing the statusCable glands2 x M20, 2 x M16 for power supply, valve and signalsTerminal rail

Wire cross section max. 4 mmOK/INFO buttonSwitches the display over between measuring data and info menu. Confirmation ofadjusted values and parametersWheel shuttleRotary switch, activated if in action. Switches between different menues and sub-menues.Safety glasAcrylic glass with magnification of the display


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Menu

planF-351.P


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Structure and Function

In conjunction with an enclosure (motor enclosure, junction box), the EEx-p systemF-361.C4 provides a pressurized motor that is in compliance with EN 60079-2.For this purpose, it has all the facilities and sensors needed to monitor the necessary

purging phase and then to monitor and maintain an overpressure within the EEx-penclosure (motor cabinet).

1 Structure

The controlling system consists mainly of two components which must be installedseparately:

- controlling cabinet ST-200C, with built-in piping ,valves, electronic and- the outlet valve VA-100-3H.

The controller F-351.P itself monitors and regulates the overpressure in theenclosure, while the digital/proportional valves doses the air quantity needed toachieve the pressurized apparatus.

2 General Functional Description

After a functional test and start-up, the controller F-351.P in the control cabinetST-200C monitors the flowrate of the compressed air or inert gas during the initial

purging process, and then monitors and regulates the internal pressure of the EEx-penclosure with regard to the surrounding atmosphere during normal operation.

Display

In three lines of 12 characters each, the digital display shows the enclosuresinternal pressure during normal operation, and the remaining purging time inminutes and seconds during the initial purging process. During normal operation,you can call up further information by pressing the button "OK / Info". Faultswhich are detected during the self-check are shown here with a number.

OK-button

The button on the left side (OK / INFO) is used in normal operation to call upthe stored parameters Enclosure Pressure, Purging Time, Function ofRelay 3, Function of Relay 4, Switchpoint of Purge Start, Switchpoint ofMinimum Pressure, Switchpoint of Overpressure and Regulation. During theparametrization, this button is used to select and confirm the variousparameters.


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Rotary switch

The right field (Menu) permits access to the Wheel Shuttlewith a tool (e.g. ascrewdriver) for parametrizing the controller. With this Wheel Shuttle, you canstart the parametrization and set the individual parameter values.

Screw terminal in the control unit F-351.P

In the lower part of the cover (see page 1), the terminal assignment of thecontroller is shown. Terminals 1 to 3 are inputs; they provide electrical power tothe controller. Contact K1 at the terminals 4 and 5 is potentialfree and freeprogrammable. The operating release is given at the terminals 6 and 7. At theterminal 8,9 and 10 the proportional valve for leakage compensation isconnected.

Immediately after the compressed air supply is opened and the main voltage isapplied, the internal self-check of the controller begins automatically. Any faultoccurring during the self-check sequence is indicated by

An explanation of the fault numbers (XX) is given in the manual, section 3.5 Faultsand Troubleshooting, Table 1: Faults detected during the self-check.

If the self-check is carried out successfully, the initial purging of the enclosurecommences, ending when at least five times the enclosure volume has beencirculated. The purging process is indicated by the message

in the display. All the time, the remaining purging time is counted down to 00 min and00 seconds.

After the end of the purging sequence, the Non-Ex units in the enclosure areswitched on. The overpressure in the enclosure then constantly monitored foradherence to the setpoint value (factory setting: 2.0 mbar) and also for transgressingof the Min value (factory setting: 0.8 mbar) and exceeding of the Max value (factorysetting: 25.0 mbar). Normal operation is indicated by the message

in the display.

FAULTXX

REMAININGPURGE TIME:XX MIN XX SEC

ENCLOSUREPRESSURE:XXX.X MBAR


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Functional sequence of the Ex px control system

For a reliable operation of the Ex p control system different states have to be fulfilled.

State 1: Minimum conditions to start purge

adjustment valve"leakage air compensation/operating pressure"

adjustment valve"purge volume"

main valve

ST-X00

operating pressuremin 4,2 max 7,0 barg pressure regulatorwith gauge

prop. valve

purge valve

p = 3,5 ... max. 4 bar

motor enclosure

control unit F-351.P

0,8 ... 10 mbar

minp

P

outlet valveVA-100-3H

A

P

B

P

measuring pointdifferential pressure13

15

1716

10 12

14

1

19

8

22 21

2

1. Overpressure in the motor enclosure has to be > 50 Pa against atmosphere.2. The max. overpressure (adjusted in F-351) not exceeded.3. Purge flow V1is smaller than the adjusted Min. value in the F-351.4. Purge time incomplete.

If all four conditions are fulfilled, hence it follows the state Minimum conditions tostart purge.

While the power supply is switched off and the adjustment of the secondary pressure(pressure after the pressure regulator Pos. 11) is p2= 3,5 4 bar,the operate pressure/leakage compensation is adjusted by the leakage valve(Pos. 12). Herewith the first condition overpressure > 50 Pa is fulfilled.

The value is in a range of 80 Pa and 1000 Pa (it depends on the construction of themotor enclosure). So the second condition max. overpressure not exceeded is alsofulfilled. The purge flow is smaller than the adjusted minimum,while the purge valve is closed and in the outlet valve (VA-100-3H) no air flowcan be measured. The third condition is fulfilled. The fourth condition is fulfilled, whilethe system is not powered.

Signal conditions at the terminals in the connection box GUB 02 at this time

Signal Relay Terminal ConditionPurging in progress F-351.P/K1 11 12 Contact openedStart/Stop K2 + K3 9 10 Contact opened

Pre-alarm MIN F-369/K2 7 8 Contact openedPre-alarm MAX F-369/K3 5 6 Contact openedFailure F-369/K4 3 4 Contact opened


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State 2: Purging

ST-X00 pmin

BA

P P P

p = 3,0 bar

0,8 ... 25mbar10 12

14

15

13

8

16

19

17

1

22 21

2

main va lve pressure regulatorwith gauge


prop. valve

purge valve adjustment valve"purge volume"


motor enclosure

measuring pointdifferential pressure


operating pressuremin 4,2 max 7,0 barg

1. Overpressure in the motor enclosure has to be > 50 Pa against atmosphere.2. The max. overpressure (adjusted in F-351) not exceeded.3. Purge flow V1is higher than the adjusted Min. value in the F-351.4. Purge time incomplete.

If all four conditions are fulfilled, hence it follows the state Purging.

Condition 1 and 2 are fulfilled from state 1. If the control unit is powered now, thepurge valve (Pos. 15) and the prop. valve (Pos. 14) are open.Also the outlet valve (VA-100-3H) opens. The compressed air streams through theEx p system and a part of it expands in the motor enclosure. A little overpressuresubsists in the motor enclosure. Through the opened outlet valve (VA-100-3H) thecompressed air streams in the environment.In the outlet valve a measuring point for pressure difference is installed.If the air volume at the end of the outlet valve is measured with an additional

instrument, the start point for the purging can be fixed by the measured air flow andthe differential pressure at this point of time.

The air flow is at this point of time higher than the adjusted value in the control unit.So the third condition is fulfilled. Hence it follows combined with the condition Purgetime incomplete the state Purging. The purge time starts.


Signal Relay Terminal ConditionPurging in progress F-351.P/K1 11 12 Contact closedStart/Stop K2 + K3 9 10 Contact openedPre-alarm MIN F-369/K2 7 8 Contact openedPre-alarm MAX F-369/K3 5 6 Contact openedFailure F-369/K4 3 4 Contact opened


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To prevent a false alarm, as a result of pressure oscillations through the motorhousing during the purging sequence, a drop-out time delay of ca. 5 sec isprogrammed in the control unit. This prevents a prompt reset of the purge time to thestart value. The purge time is stopped, if the adjusted diff. pressure is reached withinthe 5 sec, the purge time starts at the stopped time. Otherwise the purge time will be

resetted.

The required purging time depends on the setting of the purge volume (normally 10times the free volume of the motor cabinet) and the presetted inlet pressure at thepressure regulator (Pos.11).

State 3: Purging complete, power connected, leakage compensation

ST-X00

6 - 8 bar

3,5 ... max. 4 bar

0,8 ... 10 mbar

P

pmin

PP

A B

if operating pressure dropsthis valve is active

10 12

1413

15

8

16 17

19

22 21

1

main valve pressure regulatorwith gauge


prop. valve

purge valve adjustment valve"purge volume"


motor enclosure

measuring pointdifferential pressure


operating pressuremin 4,2 max 7,0 barg

1. Overpressure in the motor enclosure has to be > 50 Pa against atmosphere.2. The max. overpressure (adjusted in F-351) not exceeded.3. Purge time complete.

If all three conditions are fulfilled, hence it follows the state Purging complete, .

After the regular purging the Ex [p] system switches automatically the power.The purge valve (Pos. 15) is dead and closes. Likewise the outlet valve is closing.Leakage compensation (operating overpressure) in the motor enclosure is performedby the adjustment valve leakage compensation (Pos. 12) and if needed with theproportional valve (Pos. 14). The start sequence of the motor can be initiated.


Signal Relay Terminal ConditionPurging in progress F-351.P/K1 11 12 Contact openedStart/Stop K2 + K3 9 10 Contact closedPre-alarm MIN F-369/K2 7 8 Contact openedPre-alarm MAX F-369/K3 5 6 Contact openedFailure F-369/K4 3 4 Contact opened


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During the operating time of the motor enclosure can be leaking. This is corrected bythe proportional valve (Pos. 15). The deviation control is supervised by the controlunit (Pos. 1) to the adjusted operating pressure. The operating pressure can also bereadjusted with the manual valve (Pos. 13).

The overpressure in the motor enclosure is supervised by the pressure sensors"Min"and "Max"in the control unit F-351.P. Drops the overpressure below theadjusted value of "Min", or increases the overpressure over the adjusted value of"Max", the operating release (PURGE READY) is cancelled. The signalFAILURE is given.

If the motor enclosure overpressure increases over the value of"Max", against thereference pressure (ambient air), the outlet valve opens in addition to the cancelledoperating release. After the decrease of the overpressure below the adjusted valueof "Max" the operating release is given again without starting a new purgingsequence.


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Ex d IIC control- and junction box GUB 02

In this Ex d box are all needed relays and terminals mounted, which are required forwiring the electrical system. The relays are wired together that the signalSTART/STOP is built. The connection for the power supply and signals are located

in this box . Terminals for the control signals PRE-ALARM MIN, PRE-ALARM MAXand FAILURE are located in this Ex d box.

N

PE

L1

K2 K3

3

4 8

75

6 12

11

10

9

21 3

N

F1 PE

4 8

7

6

5

12

11

10

9 PE

For the power supply a cable with a diameter of max. 17 mm can be installed, samefor signal cable. It has to be secured that the installed cable through the Ex d cablegland is accurate sealed, because of the direct wiring in the Ex d box. Not used bore

holes have to be closed with certified plugs.Do not connect Ex i circuits to these contacts

Terminal block

K2 K3

PE

L1 N

1 2

5

64

3 9

10

7

8

11

12

PEF1

N

5

64

3 9

10

7

8

PE11

12

Terminals for power feeder are suitable for cable size of 4 mm.


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Ex d IIC control- and junction box GUB 0

F-369

PE PE

In this box the opto-relay F-369 is mounted. The signals are wired in the Ex d boxGUB 02.


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Type code

For the identification of the system a stainless steel plate is fixed at the enclosureof the control cabinet.

Leakage compensation diagram

To determine the approx. leakage of your purged motor enclosure during operationplease count the turnarounds of the adjustment valve leakage comp. (Pos.14) anduse this diagram.

.L.B.EX-GERTE

TV 02 ATEX 1801Operating voltage: 230 V

Motor Manufacturer: VEM

Project name:

Serial no.:

VAC/48-62 Hz VDC

Order no.: 45089428

Project no.:

Date of pass:

EEx-p System Type F-361.C4

Leakagecompensation F-361.C4

05

1015202530354045

505560657075808590

0,00 0,25 0,50 0,75 1,00 1,25 1,50 1,75 2,00 2,25 2,50 2,75 3,00 3,25

Turns for adjustment valve"leakage comp." (Pos.12)

Leakagein

Nm

3/h

bei 3 Bar Max.leakage compensation with proportional valvel


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Checklist and test certificate

Test certificate and checklist for motor systems

VEM Sachsenwerk GmbH

Pirnaer Landstrae 176D-01257 Dresden

Motor system: F-361.C4

Power supply: 230 V / 50/60 Hz

Date of pass:

Serial number:

Order number: 45089428

Code:

Job number: 27099

checked by E.L.B.

date:

name:


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Appendix A

Timing diagram purging sequence

T1: Switching on power supply and opening air pressure supply the control unit begins with a self test and the purgingsequence of the EEx p motor enclosure starts. With an air flow which is higher than the adjusted value min air flow andthe air flow is adequate the adjusted purge volume (min. 10-fold inner free motor volume), the motor enclosure is purged.

T2: The purging sequence is finished. The adjusted motor enclosure overpressure is controlled by the leakage compensation(see chapter 5 of main manual). The Non- Ex units can be powered.

T3: Normal operation starts.

Timing diagram operating modus


T2: Normal operation starts. The internal enclosure overpressure is regulated to the setpoint value.

T3: The internal enclosure pressure rises.

T4: The increased overpressure is controlled down with the proportional valve.

T5: Normal operation begins.


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Timing diagram errors during purging sequence

T1: Switching on power supply and opening air pressure supply the control unit begins with a self test and the purgingsequence of the EEx p motor enclosure starts. With an air flow which is higher than the adjusted value min air flow andthe air flow is adequate the adjusted purge volume (min. 10-fold inner free motor volume), the motor enclosure is purged.

T2: During the purging sequence the internal overpressure increases to an excessively high value.The purge operation is aborted.

T3: During the purging sequence the minimum air volume flow falls. The purging sequence is resetted.

Timing diagram errors during the operating modus


T2: Normal operation starts. The internal enclosure overpressure is regulated to the setpoint value.

T3: The internal enclosure pressure drops. If the pressure value falls below the switchpoint Minimum pressure in relation tothe external pressure, the Non- Ex units are switched off.

T4: Renewed purge.

T5: Normal operation begins.

T6: The internal enclosure pressure rises. The increased internal enclosure pressure cannot controlled down.

T7: If the internal pressure value exceeds the switchpoint Overpressure, the Non- Ex units are switched off. The purgevalve is powered, so the outlet valve opens. The increased overpresse sinks to operation values.

T8: After the pressure decrease, normal operation begins without purging.


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Detail menu 1

OK

Francais(in compilation)

OK

English

German

OK

OK

Language ?

1

MENU


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Detail menu 2

Enterpurge time ?

OK

Enterpurge time00:10 min

Parameter range:00:10 ... 99:50 min

OK

preset parameter 00:10 min

OK

Confirmpurge timexx.xx min

2


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Detail menu 3

Switchpointmin pressure ?

OK

0.05/step

1 mbar/ step

OK

Parameter range: 0,8 - 25 mbar

preset parameter: 0,8

Confirmmin pressurexx.xx mbar

OK

OK

Switchpoint

min pressure xx.xx mbar

3

+


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Detail menu 4

Switchpointoverpressure ?

OK

1 mbar/ step

0.05/step

OK

Confirmoverpressurexx.xx mbar

OK


Parameter range: 0,8 - 25 mbar

Switchpointoverpressurexx.xx mbar

4

+OK


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Detail menu 5

Switchpointpurge start ?

OK

Switchpointpurge startxx.xx mbar

1 mbar/ step

0.05/step

OK

Confirmswp.purging

xx.xx mbar

OK


OK

Parameter range: 0,8 - 25 mbar updated flow (yy.yy mbar)

stored as purge start parameter (xx.xx mbar)set point = feedback value

ConfirmSwp. purging

yy.yy mbar

OK

Swp purgingxx.xx mbaryy.yy mbar

(set point)

(feedback value)

press for 3 sec

5

Standby/operate modus

during purging sequence and operationp > switchpoint p

OK

enclosure min

OK +


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nd./

Mod.

06.12.2008 page 31 of 34

Detail menu 6

Displaycontrast####____

OK

preset parameter: 5

Parameter range: 1 - 8

OK

Displaycontrast ?

6


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nd./

Mod.

06.12.2008 page 32 of 34

Detail menu 7

OK

OK

Function ofrelay K1 XXXXX

Input data- Isolation

Function of relay K1 ?

- System Fault- Fault 1 min

- Fault flash- Pre-al. MIN- Pre-al. MAX- Purging- Bypass

preset parameter: Purging

7

- Purge failure


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nd./

Mod.

06.12.2008 page 33 of 34

Detail menu 8

PressureregulationXXXXX

OK

Pressureregulation ?

OK

- Two-position- pulsed- proportional

preset parameter: pulsed

Input data

8


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nd./

Mod.

Detail menu 9

OK

Functionbypass ?

Enter

Password 5112

OK

Function Bypass / OFF

OK

OK

Function BypassON /

QuitBypass menue YES / NO

OK OK

9

QuitBypass menue YES / NO

4_purge unit technical documentation

Documents