Operating Manual Ex pz System F-320
Contents
1. 4 Installation and Setting to Work 15 4 1 PTEPATALOTY P 15 4 2 WAS ERO HOT A O rele NS Ut 15 4 3 Mounting or COMMON IN T D npe oae erunt ss dota ences 16 4 4 Setting Leakage Air Flowrate nennen A nn 20 4 5 EISCHICAl le ih 92 nm TR 21 5 Use tor the Intended 56 Meke bu M EdEGUS 22 Oct Transportation and Storage uso e tet b iti o bi antes bu teat o Ee 22 9 2 SAUMMONZEG IPCISOMS uude tous Mus uae NE DIR ao 22 9 9 2 uuo 22 53 1 Safety PRE CAUMIONS 2 23 5 3 2 Cleaning and Maintenance 23 6 Technical Data M 24 7 IVP COES uic ibt uie deus diii ore Io NIU 26 EC Declaration of Conformity isi ao ee Vu RA T2 od keber 27 CONLIN LOS sn C 28 1 Introduction 1 0 Features of ELB Controller F 321T O Unique patented Purgesafe function discovers a possible necessity of purging and carries it out automatically O Robust encapsulated electronic circuits high precision pressure and flow sensors resolution 5 Pa lt 0 05 mbar O Acid sea water and oil proof glass reinforced plastic housing free of corr2. An der Hartbr cke 8 64625 Bensheim Order number 8000553102 Date of issue 04 09 2006 Amendments The 1 supplement describes the change of the upper of three PCB s while the other two PCB s center and lower remain unchanged It may be used a backlighted LCD display display area 63 x 45 mm instead of the before used digitally announcement The upper PCB is intrinsically safe supplied Additionally the bottom of the upper PCB lies besides in the compound so that only the top side of the upper PCB and the display are not encapsulated The electrical data and all other data apply unchanged for this supplement The equipment incl of this supplement meets the requirements of these standards EN 50 014 1997 A1 A2 EN 50 020 2002 16 The test documents are listed in the test report No 06 YEX 553102 17 Special conditions for safe use no additional ones 18 Essential Health and Safety Requirements no additional ones NORD CERT GmbH LangemarckstraRe 20 45141 Essen accredited by the central office of the countries for safety engineering ZLS ident Nr 0044 legal successor of the TUV NORD CERT GmbH 8 Co KG Ident Nr 0032 The head of the certification body T Schwedt Hanover office Am T V 1 30519 Hanover Tel 49 0 511 986 1455 Fax 49 0 511 986 1590 page 1 1 TuV NORD Translation 2 SUPPLEMENT to Certificate No T V 03 ATEX 2017 Equipment System F 320 with control unit type F 321 Manuf
3. Jud TUV NORD CERT GmbH Ident Nr 0044 legal successor of the notified body of the TUV NORD CERT GmbH amp Co KG Ident Nr 0032 Head of the TUV NORD CERT German original certificate issued Certification Body T V CERT A4 02 04 5 000 L on 2003 01 29 This certificate may only be reproduced without any change schedule included Excerpts or changes shall be allowed by the TUV NORD CERT GmbH page 1 3 BA 02 07 04 13 SCHEDULE 14 EC TYPE EXAMINATION CERTIFICATE N TUV 03 ATEX 2017 15 Description of equipment or protective system The system F 320 with the control unit type F 321 controls a pressure e g an overpressure in EEx nP housings of the category 3 zone 2 and signals the states over output contacts furthermore if necessary also a separately certified magnetic valve can be connected The control unit type F 321 consists of an enclosure a terminal block a partially encapsulated control electronic an air admittance screw connection an air outlet and sensors for pressure and or temperature The enclosure with a sight glass and the terminal block for connecting the encapsulated electronic is in the type of protection increased safety e The upper PCB of the control electronic is in the type of protection intrinsically safety i and the both PCB below are in the type of protection encapsulation m The electrical connection can optionally be realised by a separately certificated ca
4. With Purging After that it switches over to Operate 7 operating and indicates the overpressure again Relay K1 and K2 will react on this pressure according to the respective programmed pressure value the valve output according to the enclosure temperature if provided If a lamp is on the respective contact is closed The figures show the states of lamps and display during rising overpressure with the following factory settings K1 no 0 3 mbar 30 Pa K2 no 0 5 mbar 50 Pa Figure on top Pressure below the stored levels of K1 and K2 Figure in the middle Pressure above K1 level but below K1 level Last figure Pressure above the levels of both contacts After the overpressure stays for a while below the minimal value of 0 25 mbar 25 Pa the controller switches over from Operate to Low Pressure the display shows the measured overpressure both lamps go out and both contacts K1 and K2 open again Low Pressure 00 15 mbar OPERATE 03 25 mbar Operate 00 25 mbar OPERAT 00 40 mbar OPERAT 03 25 mbar Low Pressure 00 20 mbar A OK 4 aw m INFO MM MEN With purging purge time gt 00 00 min but without temperature sensor First the display shows the measured pressure difference between enclosure and ambient As long as this pressure is below 0 25 mbar 25 Pa Low Pressure appears and the measured pressure value Both contacts K1 and K2 are open and both lamps are off indepen
5. 0165 or EN 60079 14 EN 60079 EN 61241 as well as the Accident Prevention Regulations Caution Whenever you open covers or remove parts except if this is easily possible by hand it is possible that electrically live parts may be exposed Even terminal components may be electrically live Caution Caution Caution Caution Caution The units comply with the state of the art and must only be connected to systems which have been approved for this purpose by E L B Ex Geraete Bachmann GmbH It is prohibited for the operator or his staff to open the units This may only be done by specifically authorized personnel of E L B Ex Geraete Bachmann GmbH E L B Ex Geraete Bachmann GmbH is not liable for any subsequent damage Modifications and conversions to the units are not permissible and will cause the Ex protection and the guarantee to become void E L B Ex Geraete Bachmann GmbH is not liable for any subsequent damage The operating voltage of the units shall only lie within the limits specified in the technical documentation under Technical Data E L B Ex Geraete Bachmann GmbH is not liable for any subsequent damage The technical data specified for the hazardous area comply with the values certified in the European Ex approval The user bears the sole responsibility of examining the equipment with regard to its suitability for the intended application and environmental conditions E L B Ex Geraete Bach
6. 12 VDC max e 24 VDC max Protrusion of cable glands approx 35 Cable glands 2 x M20 x 1 5 2x 16 1 5 2 5 kg 24 Mechanical versions Mounting outside on the enclosure e Installation within the enclosure e Mounting to an Ex d enclosure Input sensors e internal pressure sensor e Optional external bypass key switch or temperature sensor connected to the 5 pole socket on the side Switch points for contacts K1 K2 0 5 25 mbar overpressure 255 min purge time Switch point for terminal valve 5 C 65 C temperature Data of Contact Circuits according to DIN VDE 0435 Contact voltage Current type Power factor cos Utilization categorie 250V AC GATA po M dL 5 jJ 3 240V AC 03 AC 15 E 6A 12A ms po 90V DC 29A poo oo DC 13 According to moulding standard EN 50028 12 A according to EN 60079 18 mb 6 A Terminal assignment 1 PE protection earth 2 3 mains voltage 4 5 relay contact K1 6 7 relay contact K2 8 PE protection earth 9 10 valve voltage DC output Admissible wire diameter 0 2 4 mm 24 12 AWG Maximum length of bare wire 8 mm with the wire fully introduced No accessible metal parts admitted outside of the clamp Rated clamp current 32 A at max cross section and s 40 C Range of adjustable parameters Adjustable parameter Factory presetting Relay contact K1 0 3 25 mbar 30 2500 P
7. 321T controller 82 0 340 106 0 A d G Fig 8 Mounting holes in the Ex pz enclosure 1 2 3 4 576 O f bil top mE g m IN 2 4 screws M5x20 i 4 rubber ring 33 7x2 2 5 z rubber ring 33 7x3 5 6 air inlet bolt 1 T imi max 5 mm Fig 9 for mounting to enclosures components and their positions Fig 10 Proposal for mounting the controller F 321T to an Ex pz enclosure valve is optional O CO 1 o NO CO Operating Manual System F 320 2009 Sequence Diagram for Installation Setting to Work options additional units of system F 320 remote key switch F 480 external temperature sensor dirt rain cap for outdoor use only exhaust valve F 250 40 Operating Manual System F 320 2009 06 29 if available 19 4 4 Setting Leakage Air Flow Rate You can adjust the leakage air nozzle integrated into the pressure regulator at any time to the air flow rate needed to compensate for the leakage losses The nozzle is set in the factory to an air flow rate of 15l min for an inlet pressure of 2 bar E Inlet pressure at the Fat valve during operation 2 par _ te Pt tt tt E SIJE SA Number of turns of the leakage nozzle Air throughput in l min Fig 11 Leakage air diagram Fo
8. 60079 2 For this purpose it has all the facilities and sensors needed to monitor and control the maintaining of an overpressure within the Ex pz enclosure 3 1 Structure The controller consists mainly of two components which must be installed separately controller F 321T air inlet array consisting of pressure regulator manometer and air silencer digital Ex valve with integrated replaceable fuse only applicable in gas Ex environments The controller itself monitors and regulates the overpressure in the enclosure while the air inlet array doses the air quantity needed to compensate for the leakage of the enclosure Optionally digital proportional controller zr mE Fig 2 Structure on principle Ex pz control unit type F 321T enclosure pressure regulator Optionally you can expand the F 320 system with the following components a digital or proportional valve for purging or electronic control of the enclosure pressure an external pressure sensor an external temperature sensor Important The latest version of the technical documentation or the corresponding technical supplements is valid in each case Caution The units comply with the state of the art and must only be connected to systems which have been approved for this purpose by E L B Ex Geraete Bachmann GmbH 3 2 General Functional Description The controller F 321T pre purges optionally and maintains mo
9. and cleaning of the units it is absolutely necessary to observe the applicable ordinances and provisions concerned with explosion protection VDE 0160 VDE 0165 or EN 60079 14 EN 60079 EN 61241 as well as the Accident Prevention Regulations 5 3 2 Cleaning and Maintenance Intervals The cleaning intervals depend on how dirty the system is Please take care to ensure that the display of the monitoring unit is always easy to read Warning Electrostatic hazard Clean only with a moist cloth and detergent 23 6 Technical Data II 2 D Ex tD A21m IIC 4 T70 C ll 2 G Ex e mb pz ia or 126 Exd mb ia pz ia T4 ATEX marking acc to EN 61241 xx dust ATEX marking acc to EN 60079 xx gas Ingress protection IP66 Electrical data Uo 5 35 V lo 100 mA Po 0 535 Lo 10 uH Co 47 UF Ambient temperature Mains voltage e 2Z4VAC 109 48 62 Hz e 115 10 f 48 62 Hz 230 8 5 10 48 62 Hz 250 5 15 48 62 Hz Current consumption 30 mA at 230 and 250 V AC 60 mA at 115 V AC 300 mA at 24 VAC 250 mA at 12 24 V DC Reset for mains failure gt 2S Enclosure material GRP epoxy resin black antistatic Dimensions mm Length of enclosure 122 Width of enclosure 120 Height of enclosure approx 94 Protrusion of air outlet 40 Diameter of air outlet 40 Weight keystone characteristic 30 C lt Tamb lt 60 C e
10. least 4 mbar 400 Pascal is maintained 1 3 Ex pz Controller F 321T F 321T purges an enclosure with five times the free volume of the enclosure according to EN 60079 2 and controls the minimum overpressure as prescribed 25 Pa 0 25 mbar Freely programmable relay contacts may as well disconnect non Ex devices from their supplies as report pressure values to a master control Additionally the F 321T controller provides contacts for an ATEX approved magnetic valve for fully digital control of the start procedure and automatic compensation of leakage losses of the Ex pz enclosure during umm operation to prevent an ingress of the surrounding atmosphere safely which could contain an explosive gas mixture or in Zone 22 applications explosive dusts Optionally a temperature sensor can be connected with an external 5 pole socket After delivery this 5 pole socket is water and dust tight closed by a plastic stopper IP66 This stopper must be removed to connect the electrical plug pw e VA L V E T K 2 H 4 REJA 5s d Fig 1 View with removed front cover 4 2 Safety Information and Notes 2 1 Storage of this Manual Keep this user manual safe in the vicinity of the controller Inform all persons who have to work on or with the controller where the manual is kept 2 2 List of Notes The notes provided in this chapter provid
11. of compressed air or inert gas is provided to compensate for the leakage of the enclosure and to maintain a minimum overpressure in relation to the surrounding atmosphere The minimum overpressure allowed for pressurized apparatus of 0 25 mbar 25 Pascal can easily be read from the display of the F 321T controller Two independantly programmable potential free power relay contacts may be connected with different warning devices flashlights indicator lamps acoustic devices to signalize a pressure beneath the minimum value in the enclosure to send a respective message to a master controller or to switch off non Ex devices inside of the enclosure 3 Optionally an initial purging can be performed in order to remove a potentially explosive gas mixture of the surrounding atmosphere from the enclosure For this purpose the F 321T controller provides terminals 8 10 for connection with an external purging valve together with a freely programmable purging time counter 0 255min 1 2 2 Operation with Continuous Purging In this mode the enclosure is purged continuously with compressed air or inert gas e g in order to dissipate the heat generated in the enclosure The air outlet of the control unit can end in the hazardous area this is specially certified for this purpose Optionally the controller can be supplied with an certified particle barrier for pre purging or cooling During purging and also at normal operation an overpressure of at
12. pressing the OK switch for 5 seconds Mode ex valve F 321T controls an Ex digital valve function n c lt normally closed without electrical supply Mode non ex valve F 321T controls a standard digital valve function n o normally open without electrical supply Important A standard valve mode non ex valve must always be mounted inside of the Ex pz enclosure Please note that some seconds after switching over between these modes the pressure sensors are recalibrated to 0 mbar Pa Thus the control unit must be without pressure and air flow and the doors of the enclosure must be open Actually neither switching over the type of valve nor calibrating the pressure sensors is necessary because the controller has been programmed and calibrated in the factory As long as the overpressure inside of the enclosure is too low the display indicates Low Pressure now and the measured Low Pressure overpressure value 00 00 mbar 11 Without purging purge time 00 00 min without temperature sensor First the display shows the measured pressure difference between enclosure and ambient As long as this pressure is below 0 25 mbar 25 Pa Low Pressure appears and the measured pressure value Both contacts K1 and K2 are open and both lamps are off independent from the contact type programming As soon as the overpressure exceeds the minimum value of 0 25 mbar 25 Pa the display indicates the purge air flow see chapter
13. with Check Pressure and flashing of the backlight and indicates the overpressure The controller recognizes itself whether a new purging is necessary after a period without sufficient overpressure and carries it out as soon as pressure and air flow are sufficient again With temperature sensor If a temperature sensor is connected with the 5 pole socket the display shows the temperature of this sensor in one line with the OPERATE overpressure but only in the Operate mode 26 C 03 25 mbar With bypass switch You can easily test devices which are connected with the K1 and K2 terminals by using an external bypass switch which enables the contacts K1 and K2 to switch over without any air pressure or air flow The bypass switch is connected with the 5 pole socket However this must not be done in hazardous areas if the contacts switch on devices without explosion protection Therefore the display warns by flashing of its backlight that the bypass key switch has been activated and the lower line of the display shows the word BYPASS independent from the controller mode 13 3 6 Pressure regulator and air inlet group The air inlet group with pressure gauge and automatic venting is mounted externally on the enclosure and is bolted in an airtight manner to the R thread by the included nut The scope of delivery includes a pressure regulator connection R75 with all necessary mounting material air flow nozzle wit
14. 019 2000 EN 50020 1994 EN 50028 1987 EN 50281 1 1 1998 2 amendment EN 60079 0 2006 EN 60079 1 2004 EN 60079 2 2004 EN 60079 7 2003 EN 60079 11 2007 EN 60079 18 2004 EN 61241 0 2006 EN 61241 1 2004 E L B Ex Geraete Bachmann GmbH Co Postal address An der Hartbruecke 8 64625 Bensheim Tel 449 6251 637 36 Fax 49 6251 637 29 E Mail info elb de Commercial Register of Bensheim HRB Nr 1728 Managing Director Steffen Bachmann Trademark and registered trademark High Flow Technology trademark of the E L B company Permits low enclosure pressures even for high air flowrates Wheel Shuttle amp Patent and registered trademark of the University of Dresden and the E L B company Operating and parametrization for the Ex pz controller F 321T with simple intuitive operator guidance 2f 1 2 3 9 10 11 etaim EC TYPE EXAMINATION CERTIFICATE Equipment or Protective System intended for use in potentially explosive atmospheres Directive 94 9 EC EC Type Examination Certificate Number TUV 03 ATEX 2017 Equipment oystem F 320 with the control unit type F 321 Manufacturer E L B Ex Gerate Bachmann GmbH 8 Co KG Address D 64625 Bensheim An der Hartbr cke 8 This equipment or protective system and any acceptable variation thereto is specified in the schedule to this certificate and the documents therein referred to The T V NORD CERT GmbH notified bo
15. Ex pz Control Unit AN OPERATE Xe 9 03 25 mbar Operating Manual Ex pz System F 320 E L Type DW 60001 E L B Ex GER TE 2009 06 29 D 64625 Bensheim x 25165225 BEA 250485 EN 04 Contents COMEONA S ave 2 MNITOGUC OH m T 3 1 1 General Information on Types of Protection e 3 1 2 SP ressurzed ADD Al AUS si PEDI TIVE bede vs Doslej 3 1 2 1 Operation with Compensation for Leakage Losses 3 1 2 2 Operation with Continuous Purging ne 4 Mo o queue giro iM EO 2T tes mee es denned 4 2 Safety Informations and Notes 5 2 MANJA ate Me eb bede do b Meu e o ias 5 2 2 ea lec cm m ES 5 2 3 Note as per Ordinance on Hazardous Materials 6 3 Str cture and FUlCUODID iiio ceci eoa a irc oos ue usc a Ev Cop HEUS EU NR Moe n M ELDER 7 SX o etr m c cT 7 32 eheralFuneclion Descriptor a des vi edet 8 9 9 NOW TO nani be E ue de C tom c ru 8 3 4 How to Modify Parameters nena 10 3 5 Behaviour during Powering UPp aaa 11 3 6 Pressure regulator and air inlet group nennen nnns 14
16. a no nc 0 3 mbar 30 Pa no Relay contact K2 0 3 25 mbar 30 2500 Pa no nc 0 5 mbar 50 Pa no 55 0 00 55 C Only with a temperature sensor connected with the 5 pole socket 25 7 Type Codes Device versions e 12 VDC 24 VDC e 24 VAC 115 VAC 230 VAC 250 VAC e with external temperature sensor e mounting inside or outside of the enclosure The type code is interpreted as follows F 321T without letter standard version mounting outside of the enclosure with particle barrier PA for big air flows for additional output valve S for dust environments without particle barrier The mains voltage is printed on the respective field of the type label Available mains voltages with limits 12 VDC 24 VDC 24 VAC 115 VAC 10 230 VAC 8 5 10 250 VAC 5 15 The controller recognizes a connected sensor Optional please order separately 26 EC Declaration of Conformity We hereby confirm the conformity of the equipment listed below with the directives of the Council of the European Community The safety and installation instructions of the product documentation must be observed Model controller F 321T Directive EMC Directive 98 336 EEC European standard EN 50081 1 3 93 EN 50081 2 3 93 EN 50082 1 2 96 EN 50082 2 2 96 Directive Low Voltage Directive 73 23 EEC European standard EN 61010 1 3 94 EN 50014 February 2000 EN 50018 200 EN 50
17. acturer E L B Ex Ger te GmbH Address An der Hartbr cke 8 D 64625 Bensheim Order number 8000554000 Date of issue 2007 09 27 Amendments The changes concern the sealing compound and the reduction of the maximum permissible switching current of the relays The electrical data and all other data apply unchanged for this supplement The equipment incl of this supplement meets the requirements of these standards EN 60079 0 2006 EN 60079 1 2004 EN 60 079 2 2004 EN 60 079 7 2003 EN 60079 11 2007 EN 60 079 18 2004 EN 61241 0 2006 EN 61241 1 2004 The marking changes as follows Ex 12 G Ex mb e ia pz ia und 1120 Ex tD A21 T70 C bzw Ex li 2G Ex mb d ia pz ia und 12 D Ex tD A21 770 C 16 The test documents are listed in the test report No 07203554000 17 Special conditions for safe use None 18 Essential Heaith and Safety Requirements The Essential Health and Safety Requirements named in clause 1 5 of annex Il of the directive 94 9 EG have not been topic of the assessment NORD CERT GmbH Langemarckstrafe 20 45141 Essen accredited by the centra office of the countries for safety engineering ZLS Ident Nr 0044 legal successor of the TUV NORD CERT GmbH amp Co KG Ident Nr 0032 m j The hgad of th certification body Schwedt Hanover office Am 1 30519 Hanover Tel 49 0 511 986 1455 Fax 49 0 511 986 1590 P17 F 016 06 06 page 1 1
18. ble transmit and an enclosure both in the type of protection flameproof enclosure d In this case the terminal block of the electronic is not applied The equipment specified above is also implemented as dust protected unit Permitted range of the ambient resp flushing temperature Rated Voltages max 12 V DC max 24 V DC 24 110 f 48 62 Hz 115 VAC 10 f 48 62 Hz 230 VAC 8 5 10 f 48 62 Hz 250 VAC 5 15 f 48 62 Hz page 2 3 BA 02 07 04 TOV Schedule EC Type Examination Certificate No TUV 03 ATEX 2017 The control unit can be eguipped with 3 external pneumatic measuring connections Via 5 pin round socket a mechanical switch a separately certified control device or sensors can be connected Assignment of connecting terminals of In the type of protection intrinsically contact 1 SSCH switch 535V contact 2 TXD RS485 100 mA contact 3 RXD RS485 0 535 W contact 4 VCC z TOJH contact 5 GND 47yF trapezoidal characteristic line 16 Test documents are listed in the test report No 03 YEX 196193 17 Special conditions for safe use none 18 Essential Health and Safety Requirements no additional ones page 3 3 02 07 06 1 000 009 Translation 1 SUPPLEMENT to Certificate No TUV 03 ATEX 2017 Equipment System F 320 with the control unit type F 321T Manufacturer E L B Ex Gerate Bachmann GmbH 8 Co KG Address
19. dent from the contact type programming As soon as the overpressure exceeds the minimum value of 0 25 mbar 25 Pa the display indicates the purge air flow The upper line shows whether the air flow is below or above the stored limit for the purge start see Adjust PrStart The 12 Low Pressure 00 15 mbar lower line shows the actual purge air flow as long as the minimum value for purging is not yet reached When the minimum air flow value is reached the lower line shows the remaining purge time in minutes in seconds during on ow 21 5 ns Purging 0058 sec the last minute The upper line still shows whether the air flow is below or above the stored limit If the air flow falls below the programmed minimum value the countdown first only stops The number of the remaining purge Airflow lt 1 5 1 s time flashes As soon as the air flow is sufficient again the Purging 0058 sec countdown starts again If the air flow falls below the programmed minimum value for more than 4 seconds the purging is stopped The display shows Airflow the actual air flow Purge time countdown starts once more as Flow soon as the minimum air flow is reached again When the purge time has been counted down to zero the OPERATE display switches over to Operate and indicates the overpres 03 25 mbar sure If the overpressure drops to 0 25 mbar 25 Pa or below the controller switches over to the Purgesafe mode The display warns
20. dy No 0044 in accordance with Article 9 of the Council Directive of the EC of March 23 1994 94 9 EC certifies that this equipment or protective system has been found to comply with the Essential Health and Safety Requirements relating to the design and construction of equipment and protective systems intended for use in potentially explosive atmospheres given in Annex II to the Directive The examination and test results are recorded in the confidential report N 03 YEX 196193 Compliance with the Essential Health and Safety Requirements has been assured by compliance with EN 50014 1997 EN 50018 2000 EN 50019 2000 EN 50020 1994 __ EN 50028 1987 EN 50281 1 1 1998 If the sign X is placed after the certificate number it indicates that the equipment or protective system is subject to special conditions for safe use specified in the schedule to this certificate This EC type examination certificate relates only to the design and construction of the specified equipment or protective system according to Directive 94 9 EC Further requirements of this Directive apply to the manufacture and supply of this equipment or protective system 12 The marking of the equipment or protective system must include the following 12 GD EEx e m IIC 4 T70 C IP66 resp 12 GD EExd mia TA T70 C IP66 T V NORD CERT GmbH Hanover 2006 09 06 Hanover office Am TUV 1 D 30519 Hannover Fon 49 0 511 986 1470 Fax 49 0 511 986 1590
21. e familiar with the unit and must be aware of the applicable ordinances and provisions for explosion protection as well as the relevant accident prevention regulations The user can familiarize himself with the unit through training at the manufacturer through a special familiarization session or through an the job training course 5 3 Cleaning and Maintenance oystem F 320 and all its components require no maintenance and are self monitoring All work on the monitoring unit F 321T and or the digital proportional controller by personnel who are not expressly qualified for such activities will cause the Ex approval and the guarantee to become void All what is needed is to regularly clean the sight glass of monitoring units mounted externally on the enclosure Use only mild soap solutions or similar mild detergents 22 Before commencing any work on units located inside the enclosure please take care to observe the applicable regulations ordinances and provisions Important Installation maintenance and cleaning of the system on components belonging to the system must only be performed by persons trained and authorized for this purpose insofar as they are familiar with the units 5 3 1 Safety Precautions Before opening the enclosure it is absolutely necessary to switch off the units located inside this enclosure and to secure them against renewed powering up Important For the installation maintenance
22. e information on possible dangers to the lives and healths of persons Danger Warning damage to property Caution malfunctions at the machine or in the vicinity Important and optimum use of the units Information The notes listed in their entirety here are repeated at the corresponding points Warning Before making any other electrical connection link up the protective earth terminal and a protective earth conductor Warning Electrostatic hazard Clean only with a moist cloth and detergent Important Before switching on ensure that the operating voltages of the control unit and the digital proportional controller correspond to mains voltage Important Ensure that only fuses of the specified type and the appropriate current rating are used as replacements Jumpering or bypassing of fuses or back up fuses is inadmissible on principle Important Before setting the units to work read the technical documentation carefully Important The latest version of the technical documentation or the corresponding technical supplements is valid in each case Important Installation maintenance and cleaning of the units must only be performed by persons trained and authorized for this purpose insofar as they are familiar with the units Important For the installation maintenance and cleaning of the units it is absolutely necessary to observe the applicable ordinances and provisions concerned with explosion protection VDE 0160 VDE
23. ers The following parameters can be adjusted or indicated Overpressure level at which one of the relay contacts K1 or K2 switches over adjustable from 0 3 25 mbar 30 2500 Pa in steps of 0 1 mbar 10 Pa Function of relay contacts K1 K2 as n o lt normally open or n c lt normally closed Purge time adjustable from O to 255 minutes after which overpressure control starts owitch on and switch off delay of K1 and K2 adjustable from 0 to 60 seconds Minimum gas flow from which count down of the purge time is started ajustable from 0 5 to 4 litres per second Temperature limit at which the valve for cooling air is switched on adjustable from 10 to 55 C if a temperature sensor is connected with the 5 pole socket 8 The top of the controller case must be screwed off to operate the INFO OK button or the rotary switch The display however is always visible through a magnifying glass in the top of the case At normal operation Operate the display shows the OPERATE measured overpressure inside of the cabinet in mbar 03 25 mbar After pressing the INFO OK button once the settings of K1 appear The display indicates the stored overpressure limit Settings K1 no for contact K1 to switch over and the stored switching 00 30 mbar function nc normally closed or no normally open After pressing the INFO OK button again the same values appear for contact 2 After delivery both contacts are Settings K2 no
24. etting the units to work read the technical documentation carefully Important The latest version of the technical documentation or the corresponding technical supplements is valid in each case The Ex pz controller F 321T is built according to the state of the art and is reliable in operation It must only be used for the intended purpose Use for the intended purpose also includes compliance with the instructions issued by the manufacturer for installation setting to work and service The sockets must only be connected with devices which comply with the controller and the respective protection zone concerning electrical data and protection type and which are certified for the respective values Any other use is regarded as conflicting with the intended purpose The manufacturer is not liable for any subsequent damage resulting from such inadmissible use The user bears the sole risk in such cases 5 1 Transportation and Storage All units controller digital proportional controller accessories must be so transported and stored that they are not subjected to any mechanical stresses over 1 5g are not dropped from heights exceeding 0 3m and are not exposed to mechanical impact exceeding 3J For the transportation and storage the Ambient Temperature specified in the Technical Data shall apply 5 2 Authorized Persons Only persons specially trained for the purpose are authorized to handle the Ex pz controller F 321T they must b
25. h silencer washers and nuts Other air inlet groups and thread diameters are available on request Technical Data of air inlet group See also fig 4 Dimensions mm Height 113 up to ca 135 Width 97 Length 78 enclosure hole 17 Thread R72 both sides Input pressure 0 5 25 0 bar E 112 Output pressure 0 5 6 bar m Ys 135 mm Max Flow Rate 490 l min S Material brass Weight 0 56 kg Fig 5 Recommended arrangement for the air inlet group Fig 6 Dimensions of the air inlet group consisting of pressure consisting of pressure regulator regulator pressure gauge pressure gauge and digital valve and digital valve 14 4 Installation and Setting to Work Important For the installation maintenance and cleaning of the units it is absolutely necessary to observe the ordinances and provisions concerned with explosion protection VDE 0160 VDE 0165 or EN 60079 14 EN 60079 EN 61241 as well as the Accident Prevention Regulations UVV Important Installation maintenance and cleaning of the units must only be performed by persons trained and authorized for this purpose insofar as they are familiar with the units Caution Modifications and conversions to the units are not permissible and will cause the Ex protection and the guarantee to become void E L B Ex Geraete Bachmann GmbH is not liable for any subsequent damage 41 Preparatory Work Important Before connecting the mains supply c
26. heck the units installed in the enclosure In particular ensure that there is an adequate flow of air around the units and that any unit casings will be purged properly Furthermore ensure that the electrical units are de energized if there is any loss of pressure This includes the isolation of any data lines 4 2 Installation It is permissible to mount the Ex pz system F 320 on or in any casing which is suitable for applications with overpressure but at least IP 54 Important The wall thickness of the casing should not exceed 5 mm 15 4 3 Mounting of Control Unit F 321T For external mounting on an enclosure one hole of 35 mm must be drilled for the air inlet at the rear side of the controller F 321T and up to 4 mounting holes for the monitoring unit itself Any mounting position is possible but ensure that the display can be easily read 144 0 120 0 104 0 82 0 30 0 25 0 l 2 E FW NS A H 4 lt lt gt dn o Wu lt L a E OE 85 4 o air inlet screw R1 S TUE Tc security glass eeu 20 O V FUN to WW co Po LI AUT Y 37 0 810 Fig 7 Dimensions of the F
27. ion then and indicates the overpressure no nc A contact which had been programmed as nc normally closed is closed when the overpressure is below the programmed value If K1 is programmed as nc for example and the pressure for K1 was adjusted to 10 mbar 1000 Pa K1 will open at an overpressure of more than 10 mbar 1000 Pa Purge time Purge time starts when the air flow reaches a value which had been stored under Adjust PrStart for the first time and maintains or exceeds this level If the air flow falls below the programmed level for more than 4 seconds the purge time counter resets No contacts will switch over until the programmed purge time is not elapsed 10 Purge time can be programmed from 0 to 255 minutes If you don t want to purge your system just set the purge time to zero The purge time display will then not even appear in the INFO button sequence but still in the programming menu Factory presetting is 1 minute 3 9 Behaviour during powering up Main modes After powering up the display indicates the type of valve to be connected ex valve non ex valve 00 0 mbar 00 0 mbar There are two main modes ex valve und non ex valve which are only important in case of an Ex pz system with a digital valve connected with the F 321T controller After powering up the controller the programmed main mode can be read from the display as shown in the figures above You can always switch over to the other mode by
28. mann GmbH accepts no liability for any lack of suitability 2 3 Notes as per Ordinance on Hazardous Materials According to the Waste Disposal Law of 27 8 1986 AbfG 811 Hazardous Wastes the owner of hazardous wastes is responsible for their proper disposal At the same time according to the Ordinance on Hazardous Materials of 1 10 1986 GefStoffV 817 General Responsibility for Protection the employer has the duty of protecting his staff from danger We must therefore point out that a All units and or systems sent to E L B for repair must be free of any hazardous materials acids alkalis solutions potentially explosive gas mixtures etc b All units and or systems sent to E L B must be treated so that they do not contain any dangerous fluids or other hazardous materials For this reason in the case of units or systems which have come into contact with hazardous working materials see the Ordinance on Hazardous Materials GefStoffV these materials must be neutralized appropriately In the event that service and repair is required the measures described under a and b must be confirmed in writing d Costs incurred through disposal of hazardous materials during a repair will be invoiced to the owner of the equipment 6 3 Structure and Function In conjunction with an enclosure with type of protection IP65 or higher the Ex pz controller F 321T provides a pressurized apparatus that is in compliance with EN
29. n e Please turn the rotary switch until the display indicates the parameter which you want to change It does not matter now in which direction you turn this switch with every step the next parameter appears like after pressing the INFO OK button When you reached the desired parameter please press the INFO OK button e he display shows the same like during reading the parameters only the first word is Adjust instead of prs no Settings The display indicates the stored value The 00 30 mbar following figures are valid for readjusting contact K1 e As soon as the display shows the parameter to be changed please press OK INFO OK button to start program ming e The value of the parameter flashes now the figure above it is framed in red e Change this value by turning the MENU switch Turning right increases turning left decreases the value e Store the new value by pressing OK For K1 and K2 or is flashing after that Adjust K1 no e Chose the kind of contact by turning the MENU switch and store it by pressing OK 00 30 mbar e After confirming the last programmable value with the display jumps back to normal operation and indicates the overpressure You can always interrupt the programming procedure by not operating any switcvh for 4 seconds or conforming the existing values by OK The display jumps back to normal operat
30. nitors controls and regulates an overpressure of at least 25 Pa 0 25 mbar of inert gas in the enclosure in relation to the surrounding atmosphere during operation of the devices inside the enclosure An optional valve which is necessary for a pre purge may be connected to the valve terminals 8 9 10 or the isolated relay contacts K1 and K2 provided on terminals 4 5 and 6 7 of the control unit Optionally the inner temperature of the enclosure can be measured and decreased by purging with cool air if a temperature sensor is applied to the 5 pole socket shown in fig 1 All adjustments can be done on the front panel which explains itself Ex pz Control Unit ER OPERATE A 03 25 mbar K2 VALVE Fig 3 Front panel of the control unit 1 STN LCD display with LED backlight which indicates as full text the actual overpressure gas flow or the stored limits of overpressure purge time or temperature on which the relay contacts K1 and K2 and the VALVE output react 2 LEDs which monitor the states of the relay contacts K1 and K2 A shining LED indicates that the respective contact is closed Press button to read a stored parameter INFO or to confirm a programmed value OK 4 Rotary switch Wheel Shuttle to be operated with a small screw driver Turning the switch selects the parameter or modifies its value 5 Symbols for the terminal functions PE lt protection earth K lt relay contact 3 3 How to Read Paramet
31. osion even for off shore applications IP66 approved O Two line high contrast STN LCD text display with LED backlight O Acrylic glass lens in the front cover magnifying the LED display O Self explaining patented user tool Wheel Shuttle for quick modifications of parameters without reading the manual O High Flow technology for short purging times even of big enclosures O Power relay contacts accessible on Ex e clamps for direct contacting of big loads with cables of up to 4 mm 12 AWG wire gauge O Exi connector for temperature sensor in order to control the enclosure temperature by air flow 1 1 General Information on Types of Protection In hazardous areas of Zones 1 and 2 only certified electrical equipment with the types of protection Ex d flameproof Ex e increased safety Ex i intrinsic safety and Ex pz pressurized apparatus shall be used For some types of electrical equipment the type of protection Ex pz is the simplest and most economical and in certain cases it is the only possible one 1 2 Pressurized Apparatus In the case of pressurized apparatus for category 3 Ex zone 2 there are two basic modes a operation with compensation for leakage losses and b operation with continuous purging a continuous flow of protective gas In both cases the enclosure must be protected according IP 54 at least we recommend IP 65 1 2 1 Operation with Compensation for Leakage Losses In this mode a sufficient flow
32. programmed as no Pressure limit for K1 0 3 mbar 30 00 50 mbar Pa for K2 0 5 mbar 50 Pa After pressing the INFO OK button again the display indicates the minimum temperature limit at which a valve Settings Temp for cooling air connected with the terminals VALVE is 70 C switched on At delivery this limit is set to 55 C These settings are only shown if a temperature sensor had been connected with the 5 pole socket After pressing the INFO OK button again the stored purge time appears if it had not been set to 0 minutes Delivery settings Purge preset 1 minute 0001 min After pressing the INFO OK button again the Settings Delay appear and the time delay for the relays K1 and K2 Settings Delay for switching over Factory setting 1 second 0001 sec After pressing the INFO OK button again Settings PrStart 7 Purge Start appear together with the minimum gas flow in litres per second from which the purge time is counted M CA down which you can read under Settings Purge Factory setting is 1 5 1 5 After pressing the INFO OK button again the display starts again with the K1 settings The display will always jump back to normal operation if you do not press the button for more than 4 seconds 3 4 How to Modify Parameters In order to modify the values mentioned in chapter 3 3 please select them by turning the switch MENU with a small screw driver instead of pressing the INFO butto
33. r adjustment of the air leakage compensation close the leakage air nozzle completely by turning it clockwise with a screwdriver Starting from this reference point you can adjust the airflow by turning the nozzle counter clockwise In the leakage air diagram you find the air flow x axis as a function of complete screw rotations y axis Open the nozzle for the amount of rotations which corresponds to the air throughput you need We recommend to adjust an operating enclosure overpressure of 1 5 3 mbar Fig 12 Adjustment of the leakage compensation nozzle Technical data of the pressure regulator Dimensions 62 x 82 x 112 135 mm Connectable pressure 0 5 25 bar Hole in enclosure 17 mm Extraction pressure 0 6 bar Weight 0 5 kg Flow rate 1 bar 490 l min 20 4 5 Electrical connection F 320 Important Ensure that only fuses of the specified type and the appropriate current rating are used as replacements Jumpering or bypassing of fuses or back up fuses is inadmissible on principle standard version contact K1 contact K2 a optional both at floating potential valve of type 2_ _ programmable Or example connection with an external alarm flashlight 5 contact K2 optional at floating potential valve of type2_ _ alarm flashlight Fig 13 Circuit diagram for controller F 321T 21 5 Use for the Intended Purpose Important Before s
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