Pressurized enclosure system
Contents
1. Ex Ok Message is set and the min Pres sure is monitored Automatic purging time Yes Auto A uto Ng The FS830 calculates the purging time out of pre pressure nozzle diameter Automatic purging time No A uto N Enter the purging time directly Define the function of output O7 Ol Func none te 1 2 Explosion protection is ok O EX O k The output is set if the pressure is higher than minimum Bypass output The output is high O Byp AS if the bypass is active Purging output The output is high O Pu rg as long the pre purging procedure is running Signal pressure output the output O SIG Na is high if the actual pressure inside of the Ex pz housing is below the signal pressure level Maximum pressure output the O Pma X output is high if the actual pressure inside of the Ex pz housing is higher the maximum pressure level Define the function of output O2 O2 Fun kt none te 3 4 See functions O1 above define the circuit opening connec O2 no NC tion of output O1 terminal 1 2 no 5 normal open nc normal closed define the circuit opening connec O2 no NC tion of output O2 terminal 3 4 no 5 normal open nc normal closed Purge time h min sec Pa ram Pu r Time Enter the purge time directly The parameter only appears if auto matic no is chosen If automatic Yes the following Pu r Vo parameters will be asked e Purge2. Be sure that no explosive atmosphere is in environment running menu Get next menu item normal operation Changes indication of the display present pressure flow rate remaining purge time and present state of the purging system running menu Get previous menu item normal operation Enters main menu running menu Initiates and confirms parameter input Enter button Gonnheimer Elektronic GmbH phone 49 6321 49919 0 fax 41 Email info goennheimer de F830 5 Configuration and operation Page 16 5 4 Indication modes during normal operation The actual status of the Ex pz System is generally shown on the info display Using the Down button the user can toggle to the pressure and remaining purge time indication 5 5 How to enter and leave the bypass mode Utilizes bypass only if it is sure that no explosive atmosphere is inside the cabinet Fire certificate required The bypass mode is denied if it is possible that a explosive atmosphere can arise inside the Ex p housing gt Caution Standard situation is the FS830 is in normal operation The origin state is normal operation the Ex p housing can be purged unpurged or while purging The bypass code is needed By CODE The ex works Bypass code is 0002 0002 Enter is right code using the arrow keys and confirm with the ENTER key sk The bypass mode is now active g D A If the control unit is set to automatic on th
3. Before start up of the ignition capable apparatus the inside of the housing is to be cleaned completely The protective class of the Ex pD housing in dust explosive area with not leading capable dust has to be at least to IP5X with leading capable dust at least IP6X Gonnheimer Elektronic GmbH phone 49 6321 49919 0 fax 41 Email info goennheimer de F830 3 Configuration and operation Page 9 3 Introduction simplified pressurized enclosure system The use of pressurized enclosures allows the operation of non explosion protected standard devices inside hazardous areas The protection type pressurization Ex p is based on the principle of keeping a constant cabinet pressure with a protective purge gas to prevent the hazardous area from entering the cabinet Generally before start up the pressurized enclosure must be purged with air or protective gas to remove any explosive mixture that may be inside the enclosure This automatic procedure is called purging proc ess See chapter 2 for general requirements of pressurized enclosure and integrated ignition capable apparatus 3 1 Pressurized enclosure system F830 The device FS830 is the control device of a F830 pressurized enclosure system An simplified pressurized enclosure system F830 Zone 2 consists of three components and the enclo sure 1 Control unit for process control and monitoring 2 Sinter metal throttle SD840 to control air input fed by pressured air net
4. charge is possible and can be fatal e See Installation regulative EN 60079 14 as well as Caution Conformity statement TUV 03 ATEX 2095X Do not exceed terminal safety limits of each ter minal See limits in technical details or declarations of conformity e The internal solenoid valve fuse must be adapted l to the solenoid valve Caution 4 2 2 Terminals of the FS830 1 2 Relay contact 1 3 4 Relay contact 2 5 6 Terminal for solenoid valve 5 V 6 N 6 8 N Mains according to model conductor N or minus by DC 910 Lt Mains according to model conductor L1 or plus by DC 11 12 13 PE GND Ground G nnheimer Elektronic GmbH phone 49 6321 49919 0 fax 41 Email info goennheimer de F830 4 Mounting and Connecting Page 14 4 2 3 Place and exchange of solenoid fuse The fuse of the solenoid valve SVD Lxx is located on the bottom side of the controller If the solenoid valve doesn t work you should check the fuse 4 2 4 Power off relays The control unit FS830 switches off the line voltage the the target device via the clamps 1 2 and 3 4 The switching power is 250V 5A The maximum current limits 5 A on the clamps 28 29 and 30 31 should not be exceeded at any time E G By an application of switched power supply a multiple higher current as the nominal Warning max current may occur In this case a switching on current limitation e g NTC must be added to avoid the off limits high current If this
5. 0511 986 1470 Fax 0511 986 2555 Der Leiter EC type examination Certificates without signature and official stamp shall not be valid The certificates may be circulated only without alteration Extracts or alterations are subject to approval by the TUV NORD CERT GmbH amp Co KG Page 4 of 7 ravnom 2 Amendment to Conformity Certificate Nr T V 03 ATEX 2095 X Equipment Pressurized enclosure system type F840 control units type FS840 x x x 9 FS830 x x x 9 FS830 9 9 Manufacturer Gonnheimer Elektronic GmbH Address Dr Julius Leber Str 2 D 67433 Neuststadt Weinstra e Germany Order number 8000396325 Date 13 06 2012 Changes The pressurized enclosure system type F840 can also be manufactured according to the examination protocol listed in the associated examination certificate The changes are related to internal build up PCB relays of the control unit FS840 x x x 9 2 new types of control units FS830 x x x 9 and FS830 9 9 the special conditions and the marking In the future the marking is II 3 G Ex nA nC ic pz IIC T6 T5 Gc FS830 840 x x x 9 Il 3 G Ex nA pz IIC T6 T5 Gc FS830 9 9 Il 3 D Ex tc ic p IIIC IIIB T85 C Dc FS830 840 x x The control unit type FS830 9 9 is suitable for Monitoring of the internal pressure of housings and The output of programmable alarm signals within 2 signal circuits optical coupler at under or overshoot of programmed limit set points The contro
6. 3 1 1 Pressurized enclosure system F830 F840 comparison wo nan nm 10 32 PIESODEFANON DNAS O une mana Kan Aa DE KR NN 10 3 2 1 Pressurized enclosure system without pre purging oom 10 3 2 2 Pressurized enclosure system with pre PUTGING ooooo mann 10 3 3 Operation mode LEAKAGE compensation cssseecscccccccsseeeseeccesenscseeesececessssaaaeseeeesssssaansseeees 11 34 COMO AN angan E 11 4 MOunting and GCOnMeGuing ANE Emha 12 AS Mounin DIMENSIONS seele near Na 12 4 1 Conrod FEB ena Ibn n Na an NN ee 12 4 1 2 Sinter metal TON ia ken a 12 4 1 3 Optional solenoid valve for purging weh 12 4 14 opak Da Oa EA EE na an al 13 4 2 GONNeEINO ANN ai ana NN NN Na 13 4 2 1 GONNECHON OF Exe Camps 13 42 2 Tenan Fogo iana ba nan NN Ta 13 4 3 FOWEr OU ea reise 14 5 Configuration and Operation en e ei 15 IE WIS OIA Naa NN an O ee E na 15 9 2 AMONO La Dn aa naa ae Aa an BN 15 SS PC ega ek CR ee ne enn ee OE ee er a 15 5 4 Indication modes during normal OpEratiION oooooooW na 16 5 5 Howto enter and leave the bypass Mode iin inna anna nana nana 16 90 COMMQUIAUON Ansage 16 5 6 1 the menu TO en N Eee 16 6 Ae hua 19 6 1 Terminals and Terminals Ex IIMS 19 6 2 KEENNICANGEIANS benni tietarscecesicasdsateccch ated ma Naa aan Na 19 6 2 1 Vail alr pressure VAIUCS siusiutinastastlovantsdunianctuamvsndutunidan sd duphaaalimandtenadiarecuavansZuwanesduwvandas 20 6 9 DIMENSIONS u na mana ban Daan NA 21 Dt F ONE
7. 6 EC type examination Certificates without signature and official stamp shall not be valid The certificates may be circulated only without alteration Extracts or alterations are subject to approval by the TUV NORD CERT GmbH amp Co KG Page 2 of 7 Schedule to Conformity Statement No TUV 03 ATEX 2095 X 16 The test documentation is listed in test report Nr 03YEX550515 17 Special conditions 1 Regard the appropriate sections of EN 60 079 14 Chapter 13 and the users manual of the manufacturer for install and operation of the simplified pressurized electrical apparatus and the control unit 2 A pre purging of the pressurized enclosure is not necessary if its sure that the atmosphere inside of the enclosure and the appropriate pipes is below 25 of the lower explosive limit LEL EN 60079 14 chapter 13 4 3 The bypass switch can only be used if no danger of an appearance of an explosive atmosphere exists 4 The solenoid valve must be suitable for using in hazardous area where electrical apparatus according category 3 are required certificate of manufacturer or conformity statement is needed A suitable fuse for the solenoid valve can be mounted inside control device FS840 fuse holder in the front plate 5 Using the keys is only permitted for entering parameters of the pressurized enclosure system for service and maintenance 6 All wires have to be fixed 18 Basic Health and Safety Requirements No add
8. A AC1 terminals 1 2 3 4 Woo 1 2A AC15 or max switching voltage 30V DC 4A resistive load Terminals for the solenoid valve voltage according the mains on terminals 5 6 the terminals 7 8 9 10 Ground terminal to connect to the potential equalization point terminals 11 12 13 Type FS 830 9 9 Mains voltage oo ooo W Wo Wo Un 5V DC terminals 20 21 Alarm relays max oooooW Wo max switching current 20 mA terminals 22 23 24 25 All further specifications remain unchanged The devices of this amendment fulfills the requirements of EN 60079 0 2009 EN 60079 11 2012 EN 60079 15 2010 EN 60079 31 2009 16 The test documents are listed in report No 12 203 083880 EC type examination Certificates without signature and official stamp shall not be valid The certificates may be circulated only without alteration Extracts or alterations are subject to approval by the TUV NORD CERT GmbH amp Co KG Page 6 of 7 ravnom 2 Amendment to certification number T V 03 ATEX 2095 X 17 Special conditions for safe area 1 For the construction and operation of pressurized electrical devices and the control unit the related paragraphs of EN 60079 14 chapter 13 and the manual of the manufacturer has to be observed 2 Engage the bypass mode only if it is ensured that no explosive atmosphere exists in the environment 3 The solenoid valve must be suitable for use in explosion endangered ar
9. DIN 9001 2008 Anerkanntes Qualitatssicherungssystem nach Richtlinie 94 9 EG berwachung des QM Systems durch TUV CERT Zertifizierungsstelle CE 0044 EG Baumusterpr fbescheinigung EC Type certification Attestation d examen ce de type TUV 03 ATEX 2095 X T V CERT Zertifizierungsstelle CE 0044 Am T V 1 D 30519 Hannover Diese Konformit tserkl rung ist g ltig f r alle Produkte dig ab den a der Unterzeich nung in Verkehr gebracht werden Neustadt den 13 06 2012 iq N jji bias oo es Gesch ftsf hrer G nnheimer Elektronic GmbH EG Konformit tserkl rung Rev 2 a CONFORMITY STATEMENT Translation Equipment and protective systems intended for use in potential explosive Atmospheres Directive 94 9 EC Test Certificate number TUV 03 ATEX 2095 X Equipment Pressurized enclosure system type F840 Manufacturer Gonnheimer Elektronic GmbH Address Dr Julius Leberstr 2 D 67433 Neustadt an der Weinstra e This equipment and any acceptable variation thereto are specified in the schedule to this certificate and the documents therein referred to The TUV NORD CERT GmbH amp Co KG TUV CERT Zertifizierungsstelle notified body No 0032 in accordance with Article 9 of the Council Directive 94 9 EC of March 1994 certifies that equipment has been found to comply with the Essential Health and Safety Requirements relating to the design and construction of equipment and protective systems intend
10. Ident Nr 0044 Rechtsnachfolger der TUV NORD CERT GmbH amp Co KG Ident Nr 0032 Der Leiter der benannten Stelle Schwed Gesch ftsstelle Hannover Am T V 1 30519 Hannover Tel 49 0 511 986 1455 Fax 49 0 511 986 1590 EC type examination Certificates without signature and official stamp shall not be valid The certificates may be circulated only without alteration Extracts or alterations are subject to approval by the TUV NORD CERT GmbH amp Co KG Page 7 of 7
11. aa ee 22 6 9 RIOWLaAle AD O een einen 23 6 6 iPIODIEMIS and SOM ONS re a Bed het aA a sate Geneon Na 23 6 7 AVDCCODCS ici aimed ana ee 23 6 8 Transport Storing Repairs und DispOSal oooo Woo 24 6 9 Ex protection class of control unit FS830 oo inn anna n aan nnnnn nana 24 610 Lto Faramello S vasa ma r NN a 25 G nnheimer Elektronic GmbH phone 49 6321 49919 0 fax 41 Email info goennheimer de F830 1 Operation instructions Page 3 The symbols WARNING CAUTION NOTE Caution This symbol warns of a serious hazard Failure to observe this warn ing may result in death or the destruction of property This symbol warns of a possible failure Failure to observe this cau tion may result in the total failure of the device or the system or plant to which it is connected This symbol highlights important information Safety Measures to read and to comply Warning Warning Warning Extreme caution is advised when handling this device High electrical discharge is possible and can be fatal Work on electrical installations and apparatus in operation is generally forbidden in hazardous locations with the exception of intrinsically safe circuits In special cases work can be done on non intrinsically safe circuits on the condition that during the duration of such work no explosive atmosphere exists Only explosion protected certified measuring instruments may be used to ensure that the apparatus is voltage f
12. be used to ensure that the apparatus is voltage free Grounding and short circuiting may only be carried out if there is no explosion hazard at the grounding or short circuit connection To achieve an impeccable and safety device operation please take care for adept transportation storage and mounting as well as accurate service and maintenance Operation of this device should only be implemented by authorised persons and in strict accordance with local safety standards The electrical data on the type label and if applicable the special conditions of the test certificate TUV 03 ATEX 2095 X are to be observed For outdoor installation it is recommended to protect the explosion protected distribution and control panel against direct climatic influence e g with a protective roof The maximum ambient temperature is 40 C if not stipulated otherwise Terminal compartment in Increased Safety When closing it is to be ensured that the gaskets of the terminal compartment remain effective thus maintaining degree of protection IP 54 according to EN 60529 Close unused entries by impact proof stopping plugs which are secured against self loosening and turning Maintenance Work The gaskets of Ex e enclosures are to be checked for damages and replaced if required Terminals especially in the Ex e chamber are to be tightened Possible changes in colour point to increased temperature Cable glands stopping plugs and flanges are to be tested f
13. is missed the risk of the jammed relay contacts and within the loss of the explo sion protection exists 4 2 5 Block diagram of the FS830 Block diagram of the FS830 G nnheimer Elektronic GmbH phone 49 6321 49919 0 fax 41 Email info goennheimer de F830 5 Configuration and operation Page 15 5 Configuration and operation Configure the F830 with the 4 keys and the display 5 1 Display The built in 8 figures display indicates operation modes present pressure or flow rate data as well as malfunctions 5 2 Alarm monitor Lamp The FS830 has a monitor lamp below the display This red lamp LED blinks if the pressure inside of the Ex p housing is below the defined minimum pressure In bypass mode the LED is permanently on and in normal operation the lamp is off Lamp flashing The pressure inside of the cabinet is below 0 8 mbar No explosion proof inside cabinet Constanton Bypass mode is active no explosion proof inside cabinet Constant off Ex protection is OK normal operation 5 3 Keyboard The four multi functional keys have different meanings and functions depend on the present operation mode Key Operation Function mode gt normal operation running men hift cursor on ition right Shift right button 19 Menu Shift cursor one position rig normal operation Activates Bypass i e enable toggle ignition capable device on or off independently of the purging status
14. less than 1 cm of vent area for each 1000 cm with a minimum vent size of 6 3 mm diameter should be allow for adequate purging IEC 60079 2 Abs 5 5 2 c Place the vents in a diagonal order as shown on the picture below with a minimum vent size of 6 3 mm diameter Gonnheimer Elektronic GmbH phone 49 6321 49919 0 fax 41 Email info goennheimer de F830 2 General requirements to F830 Page 6 Bohrungen Bohrungen Im d Installer can also remove covers or doors of internal housings if they provide adequate vent diameters alternatively e If the topics above are not applicable a separate piping must be added to the internal compartment The purge medium flow through the compartment must be high enough to make sure that the air in the compartment is exchanged at least 10 times higher For instance toter Raum 3 Ventil 3 D sen f r a Luftverteilung E Ex p Gehause a aa ie aa Ka a a a 2 3 Determination of pre purging period If its not sure at power up that the atmosphere inside of the enclosure and the appropriate pipes is be low 25 of the lower explosive limit LEL EN 60079 14 chapter 13 4 a prepurging of the pressurized enclosure is necessary The pre purging of the housing is prohibited by an Ex pD system pressurized enclosure in zone 22 Gonnheimer Elektronic GmbH phone 49 6321 49919 0 fax 41 Email info goennheimer de F830 2 General requirements to F830 P
15. of ist own or he can use the automatic calculation in the menu of the FS830 see also section 5 6 1 Example Gonnheimer Elektronic GmbH phone 49 6321 49919 0 fax 41 Email info goennheimer de F830 3 Configuration and operation Page 11 ur r 2 x 2 0 5 0 025 x 10 Ge 0 0022 xm xz KE Q peispiel tt x q mit 1 bar 10 1 293 5 m m 3 Orsiwisi 0 0015 1 5 V Ay S 3 3 Operation mode Leakage compensation The FS830 works after the pre purging phase or without pre purging phase immediately after the voltage supply in the mode of operation leakage compensation In this mode of operation will maintain after an overpressure at least 0 8 mbar within the Ex p cabinet This cabinet minimum pressure as well as also a cabinet maximum pressure are programmable and are monitored constantly Leakage losses are compensated by a small bypass This bypass is integrated in the valve and mechani cally adjustable diameter 0 3 1 mm adjustable throttle for leakage compensation 3m cable length Maximum prepressure 6 bar 3 4 Location of solenoid valve fuse The fuse of the solenoid valve SVD Lxxx is located on the upper side of the FS830 See picture below 3 5 Conformity with Standards The ex proofed control device FS830 meets requirements of listed standards in the attachment Declara tion of conformity They
16. were developed manufactured and tested in accordance with state of the art engineering practice and IS09001 2008 G nnheimer Elektronic GmbH phone 49 6321 49919 0 fax 41 Email info goennheimer de F830 4 Mounting and Connecting Page 12 4 Mounting and Connecting 4 1 Mounting Dimensions 4 1 1 Control device FS830 The control device FS830 is suitable for mounting in hazardous area zone 2 The installer can place it in or outside of the Ex pz housing The installer can mount the control device using the 4 mounting holes in the housing rear but the fixing on the air in or outlet is sufficient While mounting observe local safety guidelines and the regulative EN 60079 14 gt Additional see general requirement to pressurized Caution enclosure system in section 2 in this manual The reference output M5 screw on the left side of the control unit must have contact the ambient pressure If the control unit is built into the Ex pz housing the reference output must to Caution connected to the ambient with a pipe or tube gt Additional conditions for mounting in gas Ex area Zone 2 With use of the FS830 as a device of gas Ex group the pressurized enclosure must fulfil at least the pro tective class IP54 gt Caution Additional conditions for mounting in dust Ex area Zone 22 With use of the FS830 as a device of dust Ex group IIIB the pressurized enclosure must fulfil at least the protective class IP5
17. 1 49919 0 fax 41 Figure 4 Purge air outlet LA83 0 Figure 5 Sinter metal throttle SD840 Email info goennheimer de F830 4 Annex Page 22 6 4 Flow chart The diagram shows the relationship between the pressure inside the enclosure and the re sulting flow rate The diagram is only valid without input or output sided reductions like flow reducing pipes etc LA830 0 Durchflusskennlinien flow rate curves 1 5 10 15 18 20 22 25 18 N 18 Min Geh usedruck J fur Spulphase 7 mbar 3 x LA830 0 i min cabinet pressure I for purging 7 mbar u 16 i 16 I I 14 14 2x LA830 0 12 n N 12 i I A I 0 10 i I 10 I I O I I LL I I 8 A A 8 I I 1x LA830 0 6 6 I I I 2 a n 2 S I d I I 4 0 A be bbs O 1 4 5 7 10 15 18 20 22 25 Max Gehause Gehause Innendruck P mbar druck 22 mbar cabinet pressure P mbar Mn HI Figure 6 pressure versus flow inside cabinet Gonnheimer Elektronic GmbH phone 49 6321 49919 0 fax 41 Email info goennheimer de F830 6 5 Flow rate table The table below shows the flow rate depending on pre pressure and nozzle diameter 4 Annex Page 23 ee Flow rate l s P Air 1 293 kg m bar Nozzle diameter mm 10 Pa 0 3 0 5 0 7 1 1 5 2 3 4 0 0275 0 076 0 149 0 304 0 693 1 208 2 676 4 653 0 0338 0 094 0 184 0 374 0 838 1 48 3 27 5 651 0 0391 0 109 0 213 0 4
18. 33 0 968 1 708 3 759 6 471 0 0438 0121 0 238 0 484 1 063 1 908 4 186 7 177 0 048 0 133 0 261 0 53 1 195 2 087 4 569 7 804 0 0518 0 144 0 282 0 573 1 28 2 252 4 917 8 37 4 5 0 0554 0 154 0 301 0 612 1 367 2 404 5 239 8 883 6 6 Problems and solutions Code forgotten turn the device off e g disconnect from power supply press the very right red key turn the device on hold the key until RESET appears all data is set to ex work defaults 6 7 Type codes e Control unit FS830 e Solenoid valve SVD L x We can offer you the complete Solution System F 840 with Ex p housing and mounting of your apparatus inclusive system test and ATEX re port e Outlet valve vent LA830 Vent LA830 Scope Europe ATEX adjustable Sinter metal throttle SD840 Standard G1 inside thread for outdoor applica tions e g with elbow pipe Fixing nut and gasket in scope of delivery Gonnheimer Elektronic GmbH phone 49 6321 49919 0 fax 41 Email info goennheimer de F830 4 Annex Page 24 6 8 Transport Storing Repairs und Disposal Transport Vibration free in origin package do not pitch handle carefully hacia Store the device dry inside of the origin package Disposal When the explosion proof multipurpose distribution switching and control units are eventually disposed of the national regulations governing the dis posal of waste materials in the country concerned must be rigorously ob served Repairs Def
19. 4 gt Caution With use of the FS830 as a device of dust Ex group IIIC the pressurized enclosure must fulfil at least the protective class IP65 gt Caution 4 1 2 Sinter metal throttle While operation mode leackage compensation a small amount of purging gas enters through the sinter metal throttle SD840 into the Ex p housing to provide the desired overpressure Dispensable purge gas will be exhausted at an overpressure of 3 4 mbar through the purge air outlet Vent LA830 4 1 3 Optional solenoid valve for purging The installer can mount the solenoid valve in or outside of the Ex pz housing see details from manufac turer documentation Gonnheimer Elektronic GmbH phone 49 6321 49919 0 fax 41 Email info goennheimer de F830 4 Mounting and Connecting Page 13 4 1 4 Spark barrier The purge air outlet Vent LA830 has a spark barrier according to EN 60079 2 The exhaust air can be diverted direct to Ex area The solenoid valve and the aerial outlet LA830 are to be mounted in the ex pz cabinet with maximum distance to each other e g arrangement in the space diagonals 4 2 Connecting and starting 4 2 1 Connection of Ex e clamps Min and max min 0 3 Nm clamping torque max 0 4 Nm Min und Max wire steep 0 2 2 5 mm cross section flexible 0 2 2 5 mm Note the following item while connecting e LINE VOLTAGE Extreme caution is advised when handling this device High electrical dis
20. User s manual Pressurized enclosure system manual f830 z22 v1 0 6 2012 doc Rev 0 Dr Julius Leber Stra e 2 67433 Neustadt Veinstra e Postfach 10 05 07 67405 Neustadt phone 49 6321 49919 0 fax 49 6321 49919 41 Qualit ts Managemantsystem Gonnheimer Elektronic GmbH k http www goennheimer de Email infog goennheimer de zer Reg Nr 91 0297038 F830 1 Introduction Page 2 Contents 1 Operation instruction for Explosion protected device oo oo 4 2 General requirements to pressurized enclosure system F830 F840 uu2u00 2a000000nnnnnnnnnnnnnn 5 21 General rege EN Se ee nee nee en Uae kee us NN 5 2 2 Mechanical requirements to the Ex pz KOUSING oooooooooooWoWoWoWoW WWW Wa 5 2 3 Determination Of pre purging period cccccccsccccsseecccnscesscnscuseccsausccsacueeensauseensasessuaauesensussensans 6 24 P rde medlim Kedua Oa Nai aan 7 2 5 Temperature class Of the Ex pZ NOUSING esisiini endete e aieka nra ENEE AE Ei iiet 7 2 6 Particular requirements in zone 22 Dust hazardous Af a oo inna 8 2 6 1 Pre purging cleaning of the KOUSING oo 8 262 MarndinOS ON ihe RO nn Ei 8 2 6 3 Special conditions in the manual of the Ex pD of system Zone 22 8 3 Introduction simplified pressurized enclosure system oooo oma 9 3 1 Pressurized enclosure system FE3BO ccccccccccsseeeecessneeeeceensseeeesssaseeseeessaeeeeeessaaaseeessasaeseeessaaaes 9
21. V DC Im 5A bei DC1 Pr 150W Un 250VAC Im DA bei AC1 Pm 1500VA Relay contact 2 Un 250VAC Im 1 2A bei AC15 Pm 300VA a Ii 30V DC Im 4A bei DC1 Pm 150W EEE Lo e eminal for solenoid valve Terminal for solenoid valve solenoid valve Er 910 Un 250VAC P0 Imains 0000000000 Table 1 Terminals Ex limits 6 2 Technical details Control unit FS 830 General Mounting inside hazardous area Ex protection class 13G ExnAC pz IIC T6 Gc 20 C lt TA lt 40 C II 3 G ExnAC pz IIC T5 Gc 20 C lt TA lt 60 C I3 D Ex tD pD IIIC T70 C Dc IP54 EC type certificate T V 03 ATEX 2095 X Housing Environment IP65 protection Dimensions H x W x D HxWxD 80x120x20mm o x 120 x 20 HxWxD 80x120x20mm o BEE o Aluminium lacquered Ral 7035 specifications Main voltage AC 230V 115V 48 62 Hz 10 DC 24V 10 Power consumption Power consumption ca 2 VA without solenoid valve Working circuits Un 250VAC Im 5A bei AC1 Pr 1500VA Terminal 1 4 7 250VAC 1 2A bei AC15 a 300VA 30V DC 4A bei DC1 150W ee valve te 5 6 Lana voltage is aa to mains a by internal is ER Ee Ex e terminals min und max clamp min 0 3 Nm ing torque max 0 4 Nm Min und Max wire steep 0 2 2 5 mm cross section flexible 0 2 2 5 mm Mounting Environment 20 C 40 C at T6 temperature 20 C 60 C at T5 Humidity 59 95 non condensing p Parameter in
22. X 2095 X Description of equipment The pressurized enclosure system type F840 serves to build up an explosion proofed electrical apparatus with ex protection type simplified pressurized enclosure P EN 50 021 respectively pz IEC 60079 2 The pressurized enclosure system type F840 contents of a control electronic with pressure sensor function keys display and relays build in a metallic housing as well as an output valve with spark lattice Input valve and solenoid valve are no parts of the pressurized enclosure system type F840 The pressurized enclosure system type F840 is suitable for Pre purging of the housing Monitoring of internal pressure of the enclosure and alarming with programmable alarm signals with 2 potential free relay contacts if predetermined pressure limits are exceeded The pressurized enclosure system type F840 is intended for use in hazardous area for apparatus category 3 The maximum ambient temperature depends on temperature class Temperature class Maximum ambient temperature Electrical details MAIN Semak U 230 V AC Typ FS 840 0 resp Terminals 7 8 9 10 U 115 V AC Typ FS 840 2 resp Un 24 V DC Typ FS 840 6 Relay contacts max switch power 250 V AC 6 A AC1 Terminals 1 2 3 4 1 2A AC15 or max switch power 30 V DC 4A ohm resistive load Output for solenoid valve Maximum voltage as mains Terminals 7 8 9 10 Terminals 5
23. age 7 2 4 Purge medium requirements 1 The purging medium must not be derived from hazardous area it must be con tamination free dry free of oil and dust 2 The temperature of the purge medium should not exceed 40 C If another purge medium than air is used it is important to regard the minimum oxygen content of the ambient Maybe it is necessary to install a exhaust pipe from the LA830 to out of door 4 The inlet and the outlet of the purging gas should be located as far away to each other as possible 5 The pressure lost an the solenoid valve Pyaive must not be higher than 500 mbar while pre purging 2 5 Temperature class of the Ex pz housing The installer has to define the maximum ambient temperature and the resulting maximum temperature class of the Ex pz housing To determine the temperature class measure on worst conditions the hottest point on the surface of the Ex pz housing and recalculate it to the maximum ambient temperature The minimum temperature class is the one of the FS830 and its surface temperature If some parts inside of the housing get hotter than the temperature class the installer has to determine the time in which the temperature of those parts falls below the temperature class He has to place a sign on the Ex pz housing with the following sentence Power off the apparatus and wait for x minutes for cool down X is the determinate time multiplied with a safety factor 1 5 Gonnheimer E
24. as analyser application is prohibited 2 2 Mechanical requirements to the Ex pz housing 1 Regard particularly IEC 60079 2 section 7 2 The Ex pz housing must hold the 1 5 fold of the maximum pressure which can be reached inside of the cabinet 2 mbar at least The operator has to define the maximum pressure of the housing and has to program this pressure value as monitored max pressure into the FS830 The Ex pz housing must pass a impact test according DIN EN 50021 Table 13 The protection class of the Ex pz housing must be greater than IP40 Cable glands must have a protection class greater than IP54 Oo oO Aa OQ If the Ex pz housing has surface made of synthetics e g windows with an area greater than 100 cm than a warning sign against electro static discharge is necessary Caution Danger of static discharge Clean only with humid cloth 7 There is no danger of static discharge if the synthetic surface has a thickness of lt 0 2 mm Group IIC respectively 2 mm Group IIB or less and it is mounted on a metallic ground 8 If the Ex pz housing posses internal compartments the installer has to obey the following rules a Components with a free internal volume less than 20 cm are not considered to be internal compartments requiring purging as long as the total volume of all such components is not more than 1 of the free internal volume of the pres surized apparatus EC 60079 2 Abs 5 5 4 b Provide not
25. e display shows bypass and On alter nately and the relay contacts Ter 11 12 and 13 14 are closed Now you can toggle the relay contacts by pressing the right button Remark if the E A code is unequal to zero you must enter them each time you want to change the relay contacts state 5 6 Configuration You must configure and enter the parameters of the control unit FS830 to achieve a desired mode of operation All parameters of the control unit are structured in form of a menu The Master Code M Code ex works is 0001 5 6 1 The menu format In the following table below shows explanations of the menu items The table works as a reference guide for programming the desired system structure and to set the appropriate parameters correctly The menu items are roughly sorted by class Gonnheimer Elektronic GmbH phone 49 6321 49919 0 fax 41 Email info goennheimer de F830 5 Configuration and operation Page 17 Please note that the viewable conditions of parameters are not included Classification 1 Level 2 Level 3 Level Description Explanation Define the language shown on the La NQ Ua ge display of the FS830 in this menu item Available languages are Ger man English French Dutch Span ish Purg Y means that the Ex pz Struc tu r Pu rog INQ Pu rg 1 Y housing will be pre purged before Ex Ok Message is set Purg N means that the housing Pu rg N will not be pre purged The
26. eas within category 3 devices and it must be suitable for the specific implementation area conditions declaration of the manufacturer or certificate of notified body An adequate solenoid valve fuse should be inserted into the control unit type FS 840 x x respectively FS 830 x x x 9 4 FS830 9 9 the mains terminals must be protected against transient overshoot of 140 based on 85V spike voltage The electrical connections on the terminals 20 25 should be mechanical strengthened to unload the solder connections 5 FS830 9 9 If the pre purging phase is disabled the operator must make sure that the housing does not contain an explosive atmosphere below 25 of the lower explosive limit 6 FS840 x x All electrical lines should be installed statically 7 FS830 x x the control unit and the pressurized housing should be tested together Especially the housing protection class IP54 at Il 3 G applications and IP6X at IIIC respectively IP 5X at IIIB on II 3 D applications are required The PA connection to the housing of the control units should be made 8 The temperature class surface temperature and the appropriate device group of the pressurized enclosure system F840 must include the Ex proof data of the solenoid valve 18 Essential health and safety requirements No additional T V NORD CERT GmbH Langemarckstra e 20 45141 Essen akkreditiert durch die Zentralstelle der Lander fur Sicherheitstechnik ZLS
27. ective parts may only be replaced by the Manufacturer or by personnel specially trained and supervised by the Manufacturer Only genuine spare parts from the Manufacturer may be fitted 6 9 Ex protection class of control unit FS830 Il 3 G Ex nA nC tc pz IIC T6 Gc Ta 40 C FS830 840 x x mit x 9 II 3 G Ex nA nC ic pz IIC T5 Gc Ta 60 C II 3 D Ex tc ic p IIIB T85 C Dc Ta 60 C FS830 840 x x II 3 D Ex tc ic p IIIC T85 C Dc Ta 60 C G nnheimer Elektronic GmbH phone 49 6321 49919 0 fax 41 Email info goennheimer de F830 4 Annex Page 25 6 10 List of Parameters System Installation no Date identification FS 840 Solenoid valve Language FS830 language Structure Purging Should the FS830 pre purge the pressurized enclosure Purg INQ Purg als Purg N LJ LJ Purging Automatic or direct purging method volume input Auto Auto Y Auto N LJ LJ Output LI none Q Purging out function O1 O11 Func O Exp Protect Ok OU Signal pressure Q Bypass Q Max pressure Output LI None Q Purging out function O2 O2 Func O Exp Protect Ok OU Signal pressure Q Bypass LJ Max pressure connection O2 circuit opening O2 no nc connection Parameters Purge time Purge volume Pur Vol Pre pressure Internal nozzle diameter Nozzle Minimum pressure while purg ing M IN Pre S P Minimum pressure at normal M a Fre R Pressure monitor maximum pressure M aX Pres Pressure monitor 3g Fr Cod
28. ed for use potentially explosive atmospheres given in Annex II to the Directive The examination and test results are recorded in the confidential report No Nr 03YEX550515 Compliance with to essential Health and Safety Reguirements has been assured by compliance with EN 50021 1999 EN 60079 14 1997 IEC 60079 2 2001 IEC 60079 14 1996 If the sign X is places after the certificate number it indicates that the equipment 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 in accordance with Directive 94 9 EC Further requirements of this Directive apply to the manufacture and supply of this equipment The marking of the equipment shall include the following amp 13G EExn A C P IIC T6 bzw T5 Ex n A C pz IIC T6 bzw T5 T V NORD CERT GmbH amp Co KG E Hannover 15 05 2003 T V CERT Zertifizierungsstelle s Am T V 1 D 30519 Hannover Tel 0511 986 1470 Fax 0511 986 2555 F 092 BEEE It a ee te n a Ur in 3 Ti F u an ee Te Der Leiter EC type examination Certificates without signature and official stamp shall not be valid The certificates may be circulated only without alteration Extracts or alterations are subject to approval by the TUV NORD CERT GmbH amp Co KG Page 1 of 7 13 14 15 SCHEDULE Conformity Statement No TUV 03 ATE
29. es Code for main menu Code for bypass By Code O1 circuit opening O1 no nc E E G nnheimer Elektronic GmbH phone 49 6321 49919 0 fax 41 Email info goennheimer de Anbieter Supplier Fournisseur Anschritt Address Adresse Produkt Product Produit EG Konformit tserkl rung Declaration of conformity D claration de conformit Communaut Europ enne G nnheimer Elektronic GmbH Gewerbegebiet Nachtweide Dr Julius Leber Stra e 2 67433 Neustadt Weinstra e FS830 Uberdruckkapselungssystem Das oben beschriebene Produkt erf llt die Schutzanforderungen der folgenden EG Richtlinien the product de scribed above complies with the following EG rules le produit decrit ci dessus accomplit CU reglementations 2004 108 EG 93 68 EWG 94 9 EG und ist konform mit and is in conformity with et est conforme a EN 60079 0 2009 Allgemeine Bestimmungen EN 60079 2 2007 Uberdruckkapselung p EN 60079 7 2007 Erh hte Sicherheit e EN 60079 14 2008 Errichtung elektrischer Anlagen EN 60079 15 2006 Z ndschutzart n EN 61241 1 2004 Schutz durch Geh use tD EN 61241 4 2006 Z ndschutzart pD EN 1127 1 2011 ATEX Grundnorm EN 61000 6 4 2007 Fachgrundnorm St raussendung Industriebereich EN 61000 6 2 2006 Fachgrundnorm St rfestigkeit Industriebereich zus tzliche Angaben additional information informations supplementaires Qualit tsmanagement System nach ISO EN
30. ications Gonnheimer Elektronic GmbH phone 49 6321 49919 0 fax 41 Email info goennheimer de F830 3 Configuration and operation Page 10 3 1 1 Pressurized enclosure system F830 F840 comparison The Pressurized enclosure system F830 and F840 are certified together in one common EC type certifi cate Hence the EC type certificate of the F840 is listed in the appendix of this manual The special con ditions for the F830 system are to be found in the second supplement 3 2 Pre operation phase 3 2 1 Pressurized enclosure system without pre purging If the operator is sure that the atmosphere inside of the enclosure and the appropriate pipe infrastructure is below 25 of the lower explosive limit LEL EN 60079 14 chapter 13 4 at power up he can aban don the pre purging of the enclosure in zone 2 In that case the FS830 monitors only the pressure inside of the enclosure on 0 8 mbar at minimum and maximal 22 0 at maximum If any limit is exceed the FS830 changes the state on relay s output s The purge medium flows through an adjustable sinter metal throttle into the housing while reducing its pressure see block diagram In the LA830 is an outlet valve which opens at about 5 mbar and allows the purge gas to escape from the cabinet Before this valve is a spark lattice located thus the purge medium can be exhausted directly to the hazardous area 3 2 2 Pressurized enclosure system with pre purging To pre purge the h
31. itional EC type examination Certificates without signature and official stamp shall not be valid The certificates may be circulated only without alteration Extracts or alterations are subject to approval by the TUV NORD CERT GmbH amp Co KG Page 3 of 7 19 Translation 1 Amendment to Conformity Statement No TUV 03 ATEX 2095 X Of company Gonnheimer Elektronic GmbH Dr Julius Leberstr 2 D 67433 Neustadt an der Weinstra e The pressurized enclosure system type F840 can be used to build up a explosions proof apparatus in the protection type pD according to EN 61241 4 respectively IEC61241 4 The prepuring of the housing is void in accordance with the o g standards before connection of the current supply a cleaning of the housing is necessary The connection of a spuelventils is void The marking shall include the following 13D EEx nD 22 IP54 T70 C All remaining data remain unchanged The test documentation is listed in test report Nr O4YEX551619 Special conditions The special conditions are extended as follows on use of the pressurized enclosure system type F840 for the protection type pD Before switching on of the current supply a cleaning of the housing of penetrated dust is to be accomplished if required Basic Health and Safety Requirements No additional TUV NORD CERT GmbH amp Co KG Hannover 20 10 2004 TUV CERT Zertifizierungsstelle Am TUV 1 D 30519 Hannover Tel
32. l unit type FS830 x x x 9 is suitable for Pre purging of housings Monitoring of the internal pressure of housings and The output of programmable alarm signal within 2 potential free relays contacts at under or overshoot of programmed limit set points The maximum ambient temperatures are according to the following table Maximum ambient temperature 1 3 G T6 i 3 G T5 3D EC type examination Certificates without signature and official stamp shall not be valid The certificates may be circulated only without alteration Extracts or alterations are subject to approval by the TUV NORD CERT GmbH amp Co KG Page 5 of 7 ravnom 2 Amendment to certification number TUV 03 ATEX 2095 X Electrical Details Type FS840 x x Mains voltage Un 230 V AC type FS 840 0 resp terminals 7 8 9 10 oom Un 115 VAC type FS 840 2 resp Un 24 V DC type FS 840 6 Alarm relays Max oo WWW max switching voltage 250 V AC 5 A AC1 terminals 1 2 3 4 oom 1 2A AC15 or max switching voltage 30V DC 4A resistive load Terminals for the solenoid valve voltage according the mains tension on terminals 5 6 sun the terminals 7 8 9 10 Type FS830 x x excluding FS830 9 9 Mains voltage Wo o Un 230 V AC type FS 830 0 resp terminals 7 8 9 10 0 Un 115 VAC type FS 830 2 resp Un 24 VDC type FS 830 6 Alarm relays Max oo WWW max switching voltage 250 V AC 5
33. lektronic GmbH phone 49 6321 49919 0 fax 41 Email info goennheimer de F830 2 General requirements to F830 Page 8 2 6 Particular requirements in zone 22 Dust hazardous area 2 6 1 Pre purging cleaning of the housing For the employment in the zone 22 the FS830 must not init a pre purging phase Therefore the automatic purging at the controller FS830 has to be deactivated The purging phase before the start up of the inserted electrical non ex operational funds upstream within the gas ex range is replaced in the zone 22 by inside cleaning the housing 2 6 2 Markings on the housing On the housing has to be the following markings WARNING REMOVE ALL DUST FROM THE INSIDE OF THE ENCLOSURE BEFORE CONNECTING OR RESTORING THE ELECTRICAL SUPPLY On ex p housings for zone 22 with doors without tools to be opened must the following reference be attached WARNING DO NOT OPEN WHILE ENERGIZED UNLESS IT IS OBVIOUS THAT NO COMBUSTIBLE DUST IS PRESENT 2 6 3 Special conditions in the manual of the Ex pD of system Zone 22 In the manual for Ex pD applications for the zone 22 the following items are supplemented The use of the Ex pD application within the zone 22 must take place without pre purging period phase The automatic flushing at the controller FS830 is to be therefore always deactivated The system may be operated not with a single solenoid valve but only with a leakage balance mecha nism without flushing attitude
34. or tightness and secure fit ting Intrinsically Safe Circuits Erection instructions in the testing certificates of intrinsically safe apparatus are to be observed The electrical safety values stipulated on the type label must not be exceeded in the intrinsically safe cir cuit When interconnecting intrinsically safe circuits it is to be tested whether a voltage and or current addition occurs The intrinsic safety of interconnected circuits is to be ensured EN 60079 14 section 12 Gonnheimer Elektronic GmbH phone 49 6321 49919 0 fax 41 Email info goennheimer de F830 2 General requirements to F830 Page 5 2 General requirements to pressurized enclosure system F830 F840 The pressurized enclosure control device FS830 can be combined with every Ex pz housing that full fills the following requirements 2 1 General requirements 1 The Ex pz system must be inspected by a skilled person of accordance to IEC 60079 2 EN 60079 14 and this manual 2 Mount the solenoid valve purging medium input and control unit FS830 to an maximum of distance optimal arrangement is diagonal 3 The operator must not do any technical changes to the control unit FS830 Any change will invalidate the conformity statement TUV 03 ATEX 2095 X Any maintenance activities has to be done by Gonnheimer Elektronic GmbH Corrupt Ex p pipe connections have to be repaired immediately The introduction of flammable gas into the Ex pz housing e g for g
35. ousing connect a digital working 2 2 way solenoid valve SVD L to the terminal 5 and 6 of the FS830 Also configure the pre purging period into the structure menu of the control device After pre purging the valve closes automatically and the adjustable throttle of the SVD L lets a small amount of purging medium into the housing to hold pressure The installer can determine the pre purging time once by doing the attenuation test according EN 50016 section 14 3 As an alternative he can calculate the purging time without the elaborate attenuation test see below The purging time depends on minimum flow Qmin free internal volume V and the free volume of the connected pipes Va Final the calculated time must be multiplied by 10 The purging time tpurge IS _10x V Va purge Q min The minimum flow Amin depends on the minimum pre pressure Ppremin the pressure lost at the valve Pvave internal pressure of the Ex pz housing Pint and the nozzle diameter d The pressure lost at the valve Pvave should not exceed 500 mbar The maximum internal pressure of the housing is defined to be less than 20 mbar The minimum flow Qmin can be calculated by Q En 2 a Veen u Fate u Pit x d XT p 4 p is the density of the purging medium The density of air is p 1 2393 kg m the density of nitrogen is 1 25 kg m WE calculate the p of air for all gases because the difference is only 3 The installer can calculate the purging time
36. put LC Display menu guided Configuration Different languages German English French Dutch Spanish See certificate T V 03 ATEX 2095 X for more information G nnheimer Elektronic GmbH phone 49 6321 49919 0 fax 41 Email info goennheimer de F830 4 Annex Page 20 6 2 1 Valid air pressure values Tolerance 5 v measure point Maximal pressure P max Adjustable 0 mbar 22 mbar Minimal pressure P min pre purging phase Adjustable 7 mbar 22 mbar Minimal pressure P min normal operation Adjustable 0 8 mbar 22 mbar Leakage compensation Alarm pressure P alarm Adjustable 0 mbar 22 mbar G nnheimer Elektronic GmbH phone 49 6321 49919 0 fax 41 Email info goennheimer de F830 6 3 Dimensions Ex pz Gehausewand Ex pz housing wall 120 23 4 Annex 20 80 FS830 Vorderseite frontal view 57 40 adjustable throttle for leakage compensation 3m cable length Maximum prepressure 6 bar Gehausewand cabinet wall lt 29 lt 30 gt O j Schlauchanschluss tube connection 8 x 1mm Gonnheimer Elektronic GmbH Page 21 Figure 2 Dimensions FS830 mm Frontseite front side lt Figure 3 solenoid valve SVD L x mm phone 49 632
37. ree Grounding and short circuiting may only be car ried out if there is no explosion hazard at the grounding or short circuit connection Danger of static charge Clean only with humid cloth Do not open when an explosive dust atmosphere is present Gonnheimer Elektronic GmbH phone 49 6321 49919 0 fax 41 Email info goennheimer de F830 1 Operation instructions Page 4 1 Operation instruction for Explosion protected device Application and Standards This instruction manual applies to explosion protected devices of types below This apparatus is only to be used as defined and meets requirements of EN 60 079 particularly EN60 079 14 electrical ap paratus for potentiality explosive atmospheres Use this manual in hazardous locations which are hazardous due to gases and vapours according to the explosion group and temperature class as stipulated on the type label When installing and operat ing the explosion protected distribution and control panels you should observe the respective nation ally valid regulations and requirements General Instructions Work on electrical installations and apparatus in operation is generally forbidden in hazardous loca tions with the exception of intrinsically safe circuits In special cases work can be done on non intrinsically safe circuits on the condition that during the duration of such work no explosive atmos phere exists Only explosion protected certified measuring instruments may
38. volume dm Gonnheimer Elektronic GmbH phone 49 6321 49919 0 fax 41 Email info goennheimer de F830 5 Configuration and operation Page 18 e Pre pressure bar Pre Pre S pressure of the purge medium pi pe or pre pressure controller e Internal nozzle diameter mm Nozzle 3 e Minimum pressure while pre Min Pres P purging mbar During pre purging procedure the FS830 monitors a increased pressure inside of the Ex pz hous ing to achieve the defined flow on the output valve This increased pressure is monitored with this parameter range 7 0 mbar max pressure Minimum pressure at normal op M n PresR eration mbar Monitored minimum pressure Maximum pressure at normal op M a X Pre S eration mbar Monitored maximum pressure Signal pressure at normal opera Sig Pr tion mbar Menu code Code word to start the C O d es M C O d 6 main menu Ex works 0001 It is not possible to deactivate this code with 0000 Bypass code Code word to start By C O d e bypass mode The code can be disabled with 0000 The sequence 9999 dis ables the bypass in general il Ai G nnheimer Elektronic GmbH phone 49 6321 49919 0 fax 41 Email info goennheimer de F830 4 Annex Page 19 6 Annex 6 1 Terminals and Terminals Ex limits Terminal Voltage Current a Comment Um 250VAC Im 5A bei AC 1500VA Relay contact 1 Um 250VAC Im 1 2A bei AC15 a 300VA Um 30
39. work 3 Purge gas outlet Vent LA830 x The pressurized enclosure system F830 is featured with a flexible system configuration with separate installation of the inlet valve outlet valve and control unit The inlet valve solenoid valve SVD L and the outlet valve LA830 can be mounted at various places at the pressurized cabinet The compact control unit FS830 can be integrated user friendly direct into the cabinet wall Uberdruckgekapseltes Geh use pressurized cabinet Spulmedium purge medium Netzeinspeisung mains Steuergerat FS830 Optional control unit FS830 zus tzliche F ire iT Uberdruck ption a Nicht Ex Ger t LAGAN Magnetventil pressurized solenoid valve Spulmedium non Ex purge medium device as Figure 1 Block diagram In case of higher flow rates during the purging phase multiple outlet valves LA830 can be in stalled to shorten the purge time Due to the integrated spark barrier inside the LA830 the purge air can leave the cabinet directly into the hazardous area The control unit FS830 can be connected from the inside of the Ex pz housing without the need of addi tional cable glands or tube connections In some applications the Ex protection by a simplified pressuri zation system allows an operation without pre purging of the cabinet Thereby the solenoid valve SVD L can be replaced by the adjustable leakage compensation nozzle SD840 The nozzle SD840 is also used for dust Ex Zone 22 appl
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