pressurized enclosure system F 840
Contents
1. IT min p 4 p is the density of the purging medium The density of air is p 21 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 of ist own or he can use the automatic calculation in the menu ofthe FS840 see also section 5 5 1 Example m m 2x 2 0 5 0 025 x10 pm 0 002 x m x x QE eier k re mit 1 bar 10 7 129378 4 m m 3 Oreispiel 0 0015 ze 1 5 i S S G nnheimer Elektronic GmbH phone 49 6321 49919 0 fax 41 Email info goennheimer de F840 4 Mounting and Connecting Page 9 4 Mounting and Connecting 4 4 Mounting Dimensions 4 1 1 Control device FS840 The control device FS840 is suitable for mounting in hazardous area zone 2 The installer can place it in or outside of the EEx nP 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 w Warning Observe local safety guidelines and the regulative EN 60079 14 w Warning Additional see conditions to EEx nP System in sec tion 2 in this manual 4 1 2 Optional solenoid valve for purging The installer can mount the solenoid valve in or outside of the EEx nP housing see details from manufac turer documentation 4 2 Connecting and starting Note the following item while connecting w Warning LINE VOLTAGE Extreme caution is2. The operator has to define the maximum pressure of the housing and has to program this pressure value as monitored max pressure into the FS840 8 The EEx nP housing must pass a impact test according DIN EN 50021 Table 13 9 The protection class of the EEx nP housing must be greater than IP40 10 Cable glands must have a protection class greater than IP54 11 If the EEx nP 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 12 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 13 If the EEx nP 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 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 EC 60079 2 Abs 5 5 2 G nnheimer Elektronic GmbH phone 49 6321 49919 0 fax 41 Email info goennheimer de F8
3. 40 2 particular requirements to F840 Page 5 c Place the vents in a diagonal order as shown on the picture below with a minimum vent size of 6 3 mm diameter Vents RE Vents 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 mn FS Nozzles to distribute air G nnheimer Elektronic GmbH phone 49 6321 49919 0 fax 41 Email info goennheimer de F840 2 particular requirements to F840 Page 6 2 4 Purge medium requirements 14 The purging medium must not be derived from hazardous area it must be con tamination free dry free of oil and dust 15 The temperature of the purge medium should not exceed 40 C 16 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 FS840 to out of door 17 The pressure lost an the solenoid valve P awe must not be higher than 500 mbar while pre purging 18 The introduction of flammable gas into the EEx nP housing e g for gas analyser application is prohibited 2 5 Tempe
4. User s manual Pressurized enclosure system F 840 berdruckkapselung Steuerger t FS840 Gonnheimer Elektronic GmbH Gefahr BYPASS INFO durch Netzspannung Caution High M Datum Pr f Nr Netzspannung v DC AC 48 62Hz manual_f840_v1 0 doc rev 4 e Dr Julius Leber Stra e 2 G onn h eimer inten 67433 Neustadt WeinsiraBe Qualitats Postfach 10 05 07 Managemantsystem i 67405 Neustadt Elektronic GmbH phone 49 6321 49919 0 49 6321 49919 41 http www goennheimer de Email info goennheimer de Zert Reg Nr Q1 0297038 fax F840 1 Introduction Page 2 Contents 1 Operation instruction explosion proofed devices ccccesceeeeeceeeeeeeeeeseeneeeeeeseeeeeseaeeeseeeeeeeeeeees 3 2 Particular requirements to pressurized enclosure system F840 cesses 4 2 1 General requirements a a seen ameet enhn aa A ssh A innate EE aE nna nnde 4 2 2 Determination of pre purging period ennemis 4 23 Mechanical requirements to the EEX nP housing sse 4 2 4 Purge medium requirements esses enses nennen rne nnne nnns 6 25 Temperature class of the EEX nP housing sss esee 6 3 Introduction pressurized enclosure system F 840 eene enn 6 3 1 Pressurized enclosure system for zone 2 eene 7 3 1 1 Pressurized enclosure system without pre purging seen 7 3 1 2 Pressurized enclos
5. abled with 0000 The sequence 9999 dis ables the bypass in general G nnheimer Elektronic GmbH phone 49 6321 49919 0 fax 41 Email info goennheimer de F840 5 Configuration and operation Page 13 5 6 How to enter and leave the bypass mode H The use of the bypass is only allowed if its sure that no explosive Y Warning atmosphere is inside and around the EEx nP housing A 1 1 Press the up button 2 The bypass code is needed By CODE 3 The ex works Bypass code is 0002 0002 Enter is right code using the arrow keys and confirm with the ENTER key Bypass The bypass mode is now active Leave the bypass mode in the same way to enter M UM G nnheimer Elektronic GmbH phone 49 6321 49919 0 fax 41 Email info goennheimer de F840 4 Annex Page 14 6 Annex 6 1 Terminals and Terminals Ex limits Terminal Voltage Current Power Comment 1 2 Um 250VAC Im 5A bei AC1 Pm 1500VA Relay contact 1 Um 250VAC Im 1 2A bei AC15 Pm 300VA Um 30V DC Im 5A bei DC1 Pm 150W 3 4 Um 250VAC Im 5A bei AC1 Pm 1500VA Relay contact 2 Um 250VAC Im 1 2A bei AC15 Pm 300VA Um 30V DC Im 4A bei DC1 Pm 150W 5 6 Terminal for solenoid valve 7 8 9 10 Um 250VAC mains Table 1Terminals Ex limits 6 2 Technical details Ex protection class l 3 G EEx nAC P IIC T6 20 C lt TA lt 40 C I 3 G EEx nAC P IIC T5 20 C l
6. advised when handling this device High electrical dis charge is possible and can be fatal e See Installation regulative EN 60079 14 as well as Conformity statement TUV 03 ATEX 2095X e 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 to the solenoid valve 4 2 4 Terminals of the FS840 Relay contact 1 Relay contact 2 Terminal for solenoid valve Mains according to model conductor N or minus by DC Mains according to model conductor L1 or plus by DC G nnheimer Elektronic GmbH phone 49 6321 49919 0 fax 41 Email info goennheimer de F840 5 Configuration and operation Page 10 5 Configuration and operation Configure the F840 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 Monitor Lamp The FS840 has a monitor lamp below the display This red lamp LED blinks if the pressure inside of the EEx p housing is below the defined minimum pressure In bypass mode the LED is permanently on and in normal operation the lamp is off 5 3 Keyboard The four multi functional keys have different meanings and functions depend on the present operation mode Operation Function mode normal operation none GE lt Shift night button running menu Shift cursor one position
7. cted 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 to DIN 40 Unused entries are to be closed off by impact proof stopping plugs which are secured against s osening 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 fl es are to be tested for tightness and secure fit ting Safety Measures to read and to comply 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 be used to ensure that the apparatus is voltage free Grounding and short circuiting may only be carried out if there is no explo sion hazard at the grounding or short circuit connection Warning Extreme caution is advised when handli
8. d directly to the hazardous area 3 1 2 Pressurized enclosure system with pre purging To pre purge the housing connect a digital working 2 2 way solenoid valve SVD L to the terminal 5 and 6 of the FS840 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 G nnheimer Elektronic GmbH phone 49 6321 49919 0 fax 41 Email info goennheimer de F840 3 Configuration and operation Page 8 10x V Va purge Q nin The minimum flow Qmin depends on the minimum pre pressure Ppremin the pressure lost at the valve Pvaye internal pressure of the EEx nP housing Pint and the nozzle diameter d The pressure lost at the valve Pyawe 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 2x CP nii Prane ea E d X
9. ers G nnheimer Elektronic GmbH phone 49 6321 49919 0 fax 41 Email info goennheimer de System Installation no Date identification FS 840 Solenoid valve E Display Value state Auto CA Aion Purging Should the FS840 pre purge the pressurized enclosure Purging Automatic or direct purging method volume input Output L none Q En out function O1 Oifunc Func O Exp Protect Ok U Signal pressure Bypass U Max pressure Output None L Purging out function O2 O2 Func O Exp Protect Ok U Signal pressure U Bypass Max pressure O1 circuit oO oO connection O2 circuit connection a a Parameters Purge time 5 Purge volume Pur Vol Pre pressure Pre Pres Internal nozzle diameter Nozzle Minimum pressure while purg ing Min Pres P Minimum pressure at normal F Pressure monitor maximum pressure Max Pres Pressure monitor 7 signal pressure Sig Pr Codes Code for main menu Code for bypass By Code G nnheimer Elektronic GmbH phone 49 6321 49919 0 fax 41 Email info goennheimer de
10. grammable outputs monitoring outputs nc no oTel Ex p protection ok n Bypass aktive Te2 purging ns Purging medium P monitoring pressure oTe4 P gt P max outlet Tem Output solenoid valve T6 J rgTe9 10 2 B Mains P slete7ia fi t particle barrier Dee 4 solenoid valve SVD L as option 1 alternative EEx nP housing nozzle A 3 with prepurging A Bypass throttle adjustable without prepurging adjustable throttle Figure 1 Block diagram 3 1 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 FS840 monitors only the pressure inside of the enclosure on 0 8 mbar at minimum and maximal 18 0 at maximum If any limit is exceed the FS840 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 The FS840 has an mechanical output valve which opens at approximately 5 mbar to let the purge medium out Before this valve is a spark lattice located thus the purge medium can be exhauste
11. hows the flow rate depending on pre pressure and nozzle diameter Pressure Flow rate I 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 0 433 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 0 0554 0 154 0 301 0 612 1 367 2 404 5 239 8 883 G nnheimer Elektronic GmbH phone 49 6321 49919 0 fax 41 Email info goennheimer de F840 4 Annex Page 16 6 5 Type sign C Gonnheimer FS840 Uberdruckkapselung Steuergerat G nnheimer Elektronic GmbH Dr Julius LeberstraRe 2 67433 Neustadt 0032 9 TUV 03 ATEX 2095 X 3G EExnAC P IIC To T lt 40 C 3G EExnAC P IIC T5 T x60 C Ex nAC pz IICT6 T lt 40 C Ex nAC pz IICT5S T lt 60 C 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 code e Control unit FS840 e Solenoid valve SVD L x FS840 SVD L We can offer you the complete Solution System F 840 with EEx p housing and mounting of your apparatus inclusive system test and ATEX re port e adjustable Sinter metal throttle SD840 6 8 List of Paramet
12. l 1 2 no 7 normal open nc normal closed define the circuit opening connec O2 no nc tion of output O2 terminal 3 4 no normal open nc normal closed G nnheimer Elektronic GmbH phone 49 6321 49919 0 fax 41 Email info goennheimer de F840 5 Configuration and operation Page 12 Param Pur Vol Pur Time Pre Pres Nozzle Min Pres P Min Pres R Max Pres Sig Pr Purge time h min sec Enter the purge time directly The parameter only appears if auto matic no is chosen If automatic Yes the following parameters will be asked Purge volume dm Pre pressure bar pressure of the purge medium pi pe or pre pressure controller Internal nozzle diameter mm Minimum pressure while pre purging mbar During pre purging procedure the FS840 monitors a increased pres sure inside of the EEx nP housing to achieve the defined flow on the output valve This increased pres sure is monitored with this pa rameter range 7 0 mbar max pressure Minimum pressure at normal op eration mbar Monitored minimum pressure Maximum pressure at normal op eration mbar Monitored maximum pressure Signal pressure at normal opera tion mbar Codes By Code M Code Menu code Code word to start the main menu It is not possible to deactivate this code with 0000 Bypass code Code word to start bypass mode The code can be dis
13. le conditions of parameters are not included Classification 1 Level 2 Level 3 Level Description Explanation Define the language shown on the Language display of the FS840 in this menu m Lc ee item Available languages are Ger man English French Dutch Span ish Purg Y means that the EEx nP housing will be pre purged before Ex Ok Message is set Purg N means that the housing will not be pre purged The Ex Ok Message is set and the min Pres sure is monitored Automatic purging time Yes The FS840 calculates the purging time out of pre pressure nozzle diameter Automatic purging time No Enter the purging time directly Auto N Define the function of output O1 O1 Func none te 1 2 Explosion protection is ok Q Ex ok The output is set if the pressure is higher than minimum Bypass output The output is high O Bypas if the bypass is active Purging output The output is high O Purg 4 as long the pre purging procedure is running Signal pressure output the output O Signal is high if the actual pressure inside of the EEx nP housing is below the signal pressure level Maximum pressure output the O Pmax output is high if the actual pressure inside of the EEx nP housing is higher the maximum pressure level Define the function of output O2 O2 Funkt none te 3 4 See functions O1 above define the circuit opening connec Q2 no nc tion of output O1 termina
14. lified pressurized enclosure system consists of two components and the enclosure 1 control unit FS840 for process control and monitoring 2 Sinter metal throttle SD840 to control air input fed by pressured air network See manual F840 for requirements of pressurized enclosure and integrated ignition capable apparatus If the operator is not sure that the atmosphere inside of the enclosure and the appropriate pipe infra structure is below 2596 of the lower explosive limit LEL EN 60079 14 chapter 13 4 the enclosure must be purged to achieve a safe atmosphere inside of the enclosure The F840 system can purge the enclosure automatically using the solenoid valve SVD L In this case the SVD L replaces the sinter metal throttle G nnheimer Elektronic GmbH phone 49 6321 49919 0 fax 41 Email info goennheimer de F840 3 Configuration and operation Page 7 3 1 Pressurized enclosure system for zone 2 The control device FS840 provides all necessary functions to install a pressurized enclosure system ac cording EN 60079 14 section 13 1998 resp IEC 60079 2 2001 pz The FS840 measures the inter nal pressure and alarms or powers off if the pre defined minimum pressure is reached The FS840 can also pre purge the housing before automatic powering on the housing In this case connect a digital work ing 2 2 way solenoid valve to the appropriate terminals The solenoid must have a separate certification for zone 2 pro
15. ng this device High electrical discharge is possible and can be fatal G nnheimer Elektronic GmbH phone 49 6321 49919 0 fax 41 Email info goennheimer de F840 2 particular requirements to F840 Page 4 2 Particular requirements to pressurized enclosure sys tem F840 The FS840 can be combined with every EEx nP housing that full fills the following requirements 2 4 General requirements 1 The EEx nP 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 FS840 to an maximum of distance optimal arrangement is diagonal 3 The operator must not do any technical changes to the control unit FS840 Any change will invalidate the conformity statement TUV 03 ATEX 2095 X 4 Any maintenance activities has to be done by Gonnheimer Elektronic GmbH 5 Corrupt EEx p pipe connections have to be repaired immediately 2 2 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 pre purging of the pressur ized enclosure is necessary 2 3 Mechanical requirements to the EEx nP housing Regard particularly IEC 60079 2 section 7 The EEx nP housing must hold the 1 5 fold of the maximum pressure which can be reached inside of the cabinet 2 mbar at least
16. nnneneennnnnnnannnnnnneennnnnsnannnnnnernnnnnnannnen 16 6 7 Type amp code annenee inne ee eine eignen 16 6 8 List f Paramelters n nnennnenn sense 16 G nnheimer Elektronic GmbH phone 49 6321 49919 0 fax 41 Email info goennheimer de F840 1 Operation instructions Page 3 1 Operation instruction explosion proofed devices Application and Standards This instruction manual applies to explosion protected control panels of type of protection types below This apparatus is only to be used as defined and meets requirements of EN 60 079 particularly EN 60079 14 electrical apparatus for potentiality explosive atmospheres It can be used 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 operating the explosion protected distribution and control panels the respective nationally valid regulations and requirements are to be observed General Instructions 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 T V 03 ATEX 2095X is to be observed For outdoor installation it is recommended to protect the explosion prote
17. rature class of the EEx nP housing The installer has to define the maximum ambient temperature and the resulting maximum temperature class of the EEx nP housing To determine the temperature class measure on worst conditions the hottest point on the surface of the EEx nP housing and recalculate it to the maximum ambient temperature The minimum temperature class is the one of the FS840 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 EEx nP 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 3 Introduction pressurized enclosure system F 840 The use of simplified pressurized enclosures allows the operation of non explosion protected devices in hazardous areas inside zone 2 The protection type pressurisation is based on the principle of maintain ing a constant pressure using air or a protective gas to prevent an explosive mixture forming near the apparatus inside the pressurized enclosure 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 An simp
18. right BYPASS normal operation Activates Bypass i e enable toggle ignition capable device on or off independently of the purging status Be sure that no explosive atmosphere is in environment gt Up button running menu Get next menu item INFO 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 Down button MEN normal operation Enters main menu running menu Initiates and confirms parameter input Enter button 5 4 Indication modes during normal operation The actual status of the EEx nP 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 Configuration You must configure and enter the parameters of the control unit FS840 to achieve a desired mode of operation All parameters of the control unit are structured in form of a menu G nnheimer Elektronic GmbH phone 49 6321 49919 0 fax 41 Email info goennheimer de F840 5 Configuration and operation Page 11 5 5 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 Please note that the viewab
19. t TA lt 60 C Ex nAC pz IIC T6 20 C lt TA lt 40 C Ex nAC pz IIC T5 20 C lt TA lt 60 C EC type certificate T V 03 ATEX 2095 X Housing Environment IP65 Remark without considering purge medium protection outlet Electrical Material Aluminium lacquered Ral 7035 specifications Main voltage AC 230V 115V 48 62 Hz DC 24V ca 2 VA without solenoid valve Working circuits Um 250VAC 5A bei AC1 Pm 1500VA Terminal 1 4 Um 250VAC Im 7 1 2A bei AC15 Pm 300VA Um 30V DC In 7 4A bei DC1 Pm 150W Solenoid valve te 5 6 Output voltage is equal to mains protected by internal fuse i meme h5mw Mounting Environment 20 C 40 C bei TG temperature 20 C 60 C bei T5 EEx p Parameter input 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 F840 4 Annex Page 15 6 3 Flow chart flow verus pressure 20 Q Ws Q mh 5 Figure 2 pressure versus flow inside Ex nP housing The diagram shows the relationship between pressure inside of enclosure and the output flow The diagram is only valid without reducing input or output diameters as well as flow re ducing pipes 6 4 Flow rate table The table below s
20. ure system with pre purging sesse eene 7 4 Mounting and Connecting ursssssnnnnnnnnnnnnnnnanannnnnnnnnnnnnanmnnnnnnnnnnnnnanmnnnnnnnnnnnnnannnnnnnnnnnnnnnnannnnnnnn 9 4 1 Mounting Dimensions RE 9 4 1 1 Control device FS840 isnie e aoee ear eenn aeir iaa aeen nennen nitentes teen ness n nna rennes ensi a 9 4 1 2 Optional solenoid valve for purging ssssessssees senes 9 4 2 Connecting and starting ouest ita ote trita ve dee E P anta oa gna o Po ER uUo a au ue ERR e Raus 9 4 2 1 Terminals of the ES840 o rib E iab EE qa Do EEEERER Hoo dar aeo pe pate Rea ce REOS 9 5 I Config ration and operatiorn neret ee us ein 10 ow MENS uar TTE RM 10 5 2 Monitor Eamp xoc IE tere ee M LE S taal mies 10 E MEE Cu om 10 5 4 Indication modes during normal operation esssss essen 10 EM M 10 5 5 1 The menu format en nennen lesben 11 5 6 How to enter and leave the bypass mode sss eene rne 13 6 Annex unsgsEG O m Bue E A nie 14 6 1 Terminals and Terminals Ex limits esses 14 6 27 Technical details aou eroe lenia tati ti eaten cdot eos 14 6 3 x NEIOWETaIT aan oi oit centra a ette beendet Ener sauna eee ko Messner 15 6 4 WElOWirate Table 1 2 oc to toI RT aet dn gui EYES Deae cupa ade Eee 15 6 9 Type Sigirni ein ein nee 16 6 6 Problems and solutions 2 22244440nsnnnnennnnnnnnnn
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