312614_wd ipurge 150 operating manual
Contents
1. Less LT T T 23 0 L fe 51 0 i 1 top 2 4 screws M5x20 3 housing iPURGE150 4 O ring 33 7x2 2 5 O ring 33 7x3 5 6 air inlet bolt 1 Fig 7 for mounting to enclosures components and their positions 16 Fig 8 Proposal for mounting the controller iPURGE150 to an EEx p enclosure Operating Manual System iPURGE150 4 Settings max temperature value 052 60 Optional Items 18 4 4 Setting Leakage Air Flow rate The digital valve is fitted with a leakage compensation adjustment screw this screw is adjusted to compensate for leaks in the enclosure The adjustment screw opens the valve and allows air to pass into the enclosure To adjust the leakage compensation ensure the enclosure is sealed Turn the leakage compensation screw until the overpressure shown on the iPURGE150 control remains constant Extronics recommend an overpressure is between 1 5 to 3 mbar The chart below shows the flow rate through the valve against rotations of the adjustment screw three curves are shown for varying inlet pressures The reference point is a fully closed valve Fully clockwise 5 0 TI T T 45 Inlet pressure at the 2 40 valve during operation 9 bar 5 35 2 5 bar 30 2 5 3 bar 2 0 1 5 1 0 0 5 0 0 10 20 30 40 50 60 70 80 90 100 Air th2. Important Before connecting the mains supply check 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 possible to mount the EEx p system iPURGE150 on or in any casing which is suitable for maintaining an internal overpressure Extronics recommend the enclosure is at least IP 54 Important The wall thickness of the casing should not exceed 4 mm 15 4 3 Mounting of the iPURGE150 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 iPURGE150 and up to 4 mounting holes for the monitoring unit itself The iPURGE150 should be mounted where the display can be easily read ig 144 0 120 0 104 0 82 0 gt ry od SSC TT 122 0 150 0 190 0 security glass intrinsic safe connector BN age D I Cn LL II IT Fr 37 0 Fig 6 Dimensions of the iPURGE150 controller 82 0 D max 4mm
3. 10pH 16 Test documents are listed in the test report No 06 YEX 553384 17 Special conditions for safe use none 18 Essential Health and Safety Requirements The standards listed in 9 can be replaced by the European Commission by new standards 28 Operating Manual System iPURGE150 XTRONICS Specialists for intrinsically safe amp explosion proof equipment EC Declaration of Conformity Extronics Ltd Meridian House Roe street Congleton CW12 1PG UK Declare under sole responsibility that the product iPURGE150 Certification To which this declaration relates is in accordance with the provision of the following directives 94 9 EC Equipment and protective systems intended for use in potentially explosive atmospheres 89 336 EC CE Marking for Electromagnetic Compatibility Directive 72 23 EC Low Voltage Directive LVD And is in conformity with the following standards or other nominative documents EN50014 2000 Electrical apparatus for potentially explosive atmospheres General requirements EN50019 2000 Electrical apparatus for potentially explosive atmospheres Flameproof enclosure je EN50020 1994 Electrical apparatus for potentially explosive atmospheres Intrinsic Safety i EN60529 1991 Degrees of protection provided by enclosures IP Code EN55024 May 1999 Information technology equipment Immunity characteristics Limits and methods of measurements EN60950 2000
4. 0 47 W Lo 10 uH Co 47 uF keystone characteristic Ambient temperature 30C lt Tamb lt 60 C Mains voltage e 12VDC max e 24VDC max e 24VAC 10 f 48 62 Hz e 115 VAC 10 f 48 62 Hz e 230 VAC 8 5 10 f 48 62 Hz e 250 VAC 5 15 f 48 62 Hz Current consumption 30 mA at 230 V AC 60 mA at 115 VAC 300 mA at 24 V AC 250 mA at 12 24 V DC Reset for mains failure gt 1s 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 Protrusion of cable glands approx 35 Cable glands 2 x M20 x 1 5 2x M16 x 1 5 Weight 2 5 kg Mechanical versions e Mounting outside on the enclosure e Installation within the enclosure 23 Input sensors Switch points for contacts K1 K2 Adjustable temperature range e internal pressure sensor e optional external bypass key switch or temperature sensor connected to the 5 pole socket on the side or the 3 pole jack socket on the rear of the unit 0 5 25 mbar overpressure 0 255 min purge time 50 65 tempe rature Data of Contact Circuits according to DIN VDE 0435 Contact voltage Type of Max current Power factor Utilization L R current COS category 250 V AC 12A 1 240 V AC 3A 0 3 AC 15 24 V DC 12A 0 ms 30 V DC 2 5 A DC 13 50 ms Terminal assignmen
5. Information technology equipment safety EN60079 2 2004 Electrical apparatus for potentially explosive atmospheres Pressurized enclosures p Signed Date 22 01 08 die Nick Saunders Technical Service Manager Extronics Ltd Meridian House Roe Street Congleton CW12 1PG Tel 44 0 1260 297274 Fax 44 0 1260 297280 E mail info extronics com Web www extronics com tr ng lo 3076287 gland and Wales Regist 29 9 Manual Revision Revision Description Date By Working Initial version of Manual 02 02 06 NS Draft Issue 1 First Issue 31 03 06 NS Issue 02 Revised Certification 22 01 08 NS Nick Digitally signed by Nick Saunders DN CN Nick Saunders C Reason am approving this S au n d e rs document Date 2008 01 22 16 39 35 Z 30
6. the schedule to this certificate and the documents therein referred to 8 The TUV NORD CERT GmbH notified body 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 Il to the Directive The examination and test results are recorded in the confidential report No 06 YEX 553384 9 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 10 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 11 This EC type examination certificate relates only to the design examination and tests of the specified equipment in accordance to the Directive 94 9 EC Further requirements of the Directive apply to the manufacturing process and supply of this equipment These are not covered by this certificate 12 The marking of the equipment or protective system must include the following 3 112 GD EEx e mia IIC T4 T70 C IP 66 bzw 112 GD EEx d m ia IIC T4 T70 C IP 6
7. 6 T V NORD CERT GmbH LangemarckstraBe 20 45141 Essen accredited by the central office of the countries for safety engineering ZLS Ident Nr 0044 legal successor of the T V NORD CERT GmbH amp Co KG Ident Nr 0032 The figad of fhe certification body Schwedt Hanover office Am TUV 1 30519 Hanover Fon 49 0 511 986 1455 Fax 49 0 511 986 1590 This certificate may only be reproduced without any change schedule Included Excerpts or changes shail be allowed by the T V NORD CERT GmbH page 1 3 ERT Ad VU H 106 05 5000 dia 26 BAC 01 05 1 000 000 1 SCHEDULE 14 EC Type Examination Certificate No T V 06 ATEX 553384 15 Description of equipment The EEx p Controller iPurge 150 controls the pressure and notifies the current states via output contacts The controller is suittable for use in potentially explosive atmospheres of zone 1 and zone 2 as well as adapted for atmospheres with combustible dust of zone 21 and 22 The typical application is the control of the overpressure in EEx p enclosures to avoid the infiltration of potentially explosive atmosphere Essentially the controller consists of an enclosure an terminal block a partially encapsulated electronic an air admittance screw connection an air outlet and sensors for pressure and or temperature The enclosure with a vision panel and the terminal block for connecting the encapsulated electronic are concepted in the type of protection Increased S
8. 66 3 digit 8mm LED display Magnifying acrylic glass lens in the front cover Patented Wheel Shuttle for easy modification of parameters OO0000 Optional High Flow technologies for shortening purging times on larger EEx p enclosures O Optional EEx i connectors for external sensors remote and control devices 2 Safety Information and Notes 2 1 Storage of this Manual Keep this user manual safe and in the vicinity of the controller All persons who have to work on or with the controller should be advised on where the manual is stored 2 2 List of Notes The notes supplied in this chapter provide information on the following e Danger Warning o Possible hazard to life or health e Caution o Possible damage to property e Important o Possible damage to enclosure purge controller or associated equipment e Information o Notes on the optimum use of the controller 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 princ
9. E XTRONICS Operating Manual CE ED EEx p iPURGE150 II 2GD EEx e m ia IIC T4 Ta70 C Document Number 312614 See Last Page for Revision Details 2008 Extronics Limited iPurge 150 iPurge 200 iPurge dv are Copyright Extronics limited Extronics reserve the right to change this manual and its contents without notice the latest version applies Contents DER ER 3 1 UNIFOGUGHON siii ola ara 4 1 1 General Information on Types of Protection 4 2 Safety Information and Notes 6 2 1 Storage ofthis Manuali ara iii lare iii 6 223 List of Notes aan NA A a 6 2 3 Notes as per Ordinance on Hazardous Materials 7 3 Structure and Function ida 8 3 1 System Opera le TEE 8 3 2 General Functional Description ss 9 3 9 How to Read Parameters uis direi 10 3 4 How to Modify Parameters ss 10 3 5 Behaviour during Powering Up ss 12 3 6 gl 13 3 8 Technical Data for the Pressure Regulator sssssesssssserrnrneeeerrrnrntnesretrrnrnnererrnrrnnent 13 3 9 Technical Data for Digital Valve 14 4 1 Preparatory e 15 42 Installations ne en a a aaa dela 15 nd le EE 18 4 4 Setting Leakage Air Flow rate ss 19 4 5 Electrical connection eee 20 5 Intended Purpose Usage sms 21 5 1 Transportation and Storage i 21 5 2 Authorized Persons sen secede hee Pes Oe deeg eee dee et ne 21 5 3 Cleaning and Maintenance 21 8 COPUT CAL ON Sia saben ccncticetsvedeticeacsatdedansienebenbeveududotielscbeusvslcaudous
10. Edvx Mains voltage current Current consumption Ambient temperature during storage transport Ambient temperature during operation Enclosure material Dimensions of IPURGEDVx mm Weight 14 230 V AC 10 universal current Optional 12 24 115 V universal 30 mA 60 mA at 230 V back up fuse 0 08 A at 115 V back up fuse 0 125A 300 mA at 24 V back up fuse 0 63 A 600 mA at 12V back upfuse 1 0 A 40 C bis 60 without condensation 40 bis 60 without condensation GRP epoxy resin black and brass length of enclosure 109 width of enclosure 56 height of enclosure approx 139 diameter of air inlet 1 4 diameter of air outlet 3 8 cable glands PG 11 or PG 09 1 0 kg 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 EN 60079 14 EN 50014 50039 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 Extronics limited is not liable for any subsequent damage 4 1 Preparatory Work
11. afety e The upper PCB of the electronic is concepted in the type of protection Intrinsic Safety i and the both PCBs below are concepted in the type of protection Encapsulation m The eletrical connection may optionally be connected to a separately certified bushing and a enclosure both realised in the type of protection Flameproof Enclosure d In this case the terminal block of the electronic is omitted Permitted range of the ambient and purging temperature 30 C to 60 C Electrical Data Rated Voltage max 12 VDC max 24 V DC 24 V AC 10 f 48 62 Hz 115VAC 10 f 48 62 Hz 230 V AC 8 5 10 f 48 62 Hz 250 V AC 5 15 f 48 62 Hz page 2 3 27 BA 02 01 06 1 000 000 TUV NORD Schedule EC Type Examination Certificate No TUV 06 ATEX 553384 Clamp assignment of the terminal block Connection Rated Voltage break contact K1 rated voltage for enable signal 9 and 10 rated voltage for valves The controller may be provided with 3 external pneumatic measuring connections A mechanical switch a separate certified console or sensors can be connected to a 5 pin round socket Clamp assignment in type of protection Intrinsic Safe EEx ia IIC Contact 1 SSCH switch Contact 2 TXD RS485 maximum values Contact 3 RXD RS485 U 5 35 V Contact 4 Vec I 100 mA Contact 5 GND Po 535 mW Characteristic line trapezoidal Eee ee max external inductance Lo
12. aining purge time during operation 3 Rotary switch Wheel Shuttle which operates with a small screw driver Rotating the switch selects the parameter or modifies its value 4 Push button to select a parameter INFO or to confirm a programmed value OK Symbols for the terminal functions PE protection earth K relay contact 3 3 How to Read Parameters The following parameters can be adjusted or indicated pressure level at which each of the relay contacts K1 K2 switches adjustable from 0 5 25 mbar 50 2500 Pa in steps of 0 1 mbar 10 Pa purge time in minutes after which overpressure control starts function of relay contacts K1 K2 as normally open or normally closed Optional temperature limit at which the valve for cooling air is switched on In normal overpressure operation the display of the control unit monitors the pressure difference between the enclosure and the surrounding atmosphere in mbar After pressing the INFO button two LED s will light Settings and K1 The controller will then show the programmed overpressure limit at which K1 switches state Additionally either LED ne normally closed or no normally open will light This will depend on the programmed function of K1 After pressing the INFO button again the same values appear for contact K2 After pressing the INFO button for the third time the LED s Settings and Purge will light the display indicates the purge time in
13. ant The latest version of the technical documentation or the corresponding technical supplements is valid in each case Caution The units must only be connected to systems which have been approved by Extronics 3 2 General Functional Description On power up the iPURGE150 controller purges the Exp enclosure removing any hazardous atmosphere which may be present inside the enclosure once the purging cycle is complete the controller then maintains monitors controls and regulates an overpressure at least 50 Pa of protective gas in the enclosure in relation to the surrounding atmosphere The digital valve is connected to the valve terminals 8 9 10 Two volt free alarm contacts are also provided on terminals 4 5 and 6 7 of control unit All adjustments to the system parameters can be performed via the rotary shuttle wheel and OK button further details can be found in sections 3 3 and 3 4 1 LED s indicate the selected function 2 Pressure mbar or time min sec value measured value or remaining time 3 rotary switch for selection of pressure purge time or relay presetting 4 push button to select INFO or confirm OK parameters 5 terminal symbols Fig 3 Front panel of the control unit 1 Dual purpose LED s Indicating the selected function during programming or controller status during operation 2 Dual purpose LED display displays the programmed function value during programming and the measured pressure rem
14. ation setting up and service Any connections made to the controller must only be with devices which are suitable for use with the controller and the respective protection zone concerning electrical data and protection type 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 oroportional 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 iPURGE150 EEx p controller they must be familiar with the unit and must be aware of the regulation and provisions required for explosion protection as well as the relevant accident prevention regulations 5 3 Cleaning and Maintenance The iPURGE150 and all its components require no maintenance and are self monitoring All work on the iPURGE150 controller 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 voi
15. aution The operating voltage of the units shall only lie within the limits specified in the technical documentation under Technical Data Extronics limited is not liable for any subsequent damage Caution The technical data specified for the hazardous area comply with the values certified in the European EEx approval The user bears the sole responsibility of examining the equipment with regard to its suitability for the intended application and environmental conditions Extronics limited accepts no liability for any lack of suitability 2 3 Notes as per Ordinance on Hazardous Materials Important notes for equipment installed in areas where materials hazardous to health are present a All units and or systems sent to Extronics 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 Extronics 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 these materials must be neutralized appropriately c Inthe 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 3 Structure and Function The iPURGE150 toge
16. c will flash The Adjust LED will continue to flash and the Settings will stay steady on The function of the contact may then be select as no or nc by rotating the MENU Switch confirm the desired setting by pressing OK 10 The programming procedure can easily be interrupted at any time by not turning or pressing any switch for more than 10 seconds The display will return to normal operation and monitor the actual measured overpressure no nc A contact which has been programmed as nc will be closed when the overpressure is below the programmed value For example If K1 is programmed as nc and the pressure for K1 was adjusted to 10 mbar K1 will open at an overpressure of more than 10 mbar Please note that if a contact is selected as nc then the contact is closed whilst the controller is switched off Info Adjust See K1 K2 purge o INFO er switch foint K1 Switchpoint K1 K2 purge LED Settings Ki K2 purge LED Ki Settings l nc or no Switchpoint K2 4 Press 7 to adjust LED Settings LED K2 I Joptional Tumi to selalu i Purge time Ae Boa K1 K2 purge flashing l Settings LED Settings LED Purge Adjust value Press o store settings I to st tting INFO optional I no contact normally open a aa E E E no or nc nc contact normally closed EN LED Settings y H Adjust K1 K2 w v DI 0 LED Temp amp flashing a no nc Settings I cont
17. d Regular cleaning of the sight glass of monitoring units is recommended for units which are mounted externally on an enclosure Use only mild soap solutions or similar mild detergents 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 and on all 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 devices located inside this enclosure and to secure them against renewed powering up Important For the installation maintenance and cleaning of the units it is absolutely necessary to observe the applicable regulatrions and provisions concerned with explosion protection EN 60079 14 EN 50014 50039 as well as the Accident Prevention Regulations 5 3 2 Cleaning and Maintenance Intervals The cleaning intervals depends on the environment where the system is installed 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 22 6 Technical Data Type of Ex protection II 2 GD EEx e mia IIC T4 T70 IP66 Electrical data Uo 5 35 V lo 136 mA Po
18. e according to the respective programmed pressure value If the ipurge150 is equipped with the optional temperature measurement the valve output open and close according to the enclosure temperature 12 3 6 Air inlet kit The air inlet kit comprises of a pressure gauge and pneumatic digital valve 3 7 Pressure Regulator The pressure regulator with pressure gauge and automatic venting is mounted externally on the enclosure and is bolted in an airtight manner to the digital valve through the 14 thread Pressure regulator 3 8 Technical Data for the Pressure Regulator Dimensions mm length D 113 width A 44 height A 44 hole drilled in enclosure 17 Thread 1 4 Extraction pressure 0 5 3 bar Flow rate 490 l min Weight 0 5 kg 13 3 9 Technical Data for Digital Valve The digital valve is used for enclosure sizes up to 2 000 L The valve functions in the 2 position control mode open closed Type iPURGEdvx Type of Ex protection TT A These 4 bolts must be undone when turning the spool Integrated leakage air nozzle with silencer EEx ed IIC T4 T5 125 2 x R3 8 sables PTB No Ex 89 C 1034 _ D a DA D Wl si 7 Sealing washer Hexagon socket 8 mm Purge air nozzle Spacing disc Dimensioned drawing of the digital controller iPURG
19. inuously on pen vor After 3 sec back to main display or back to Sege after 3 sec without storage Fig 4 Graphical programming advice inside of the front panel cover Purge Time If the controller is programmed with a purge time this purge time starts when air flow exceeds a level of approximately 0 5 l s If during purge the internal cabinet pressure falls below the pre programmed level for more than 10 seconds the purge time counter resets Once the purge cycle is complete the programmed contacts are energised The purge time can be programmed from 0 to 255 minutes During the last minute of the purge time the display counts down in seconds If purge is not required the purge time may be set at 0 minutes If the purge time is not set then the purge LED will then not appear in the info button sequence however it will appear in the programming menu Factory preset is 0 minutes To cancel the purge timer rotate the Menu switch one click in any direction this should only be performed during commissioning 11 3 5 Behaviour during Powering up Main Modes When the controller is powered up it decides which type of digital valve is connected There are two main modes P1 and P2 During the power up self test the mode can be read from the display This mode can be changed by pressing the menu switch for 10 seconds Mode P1 iPURGE150 connected to an EEx digital valve function n c normally closed Mode P2 iPURGE150 connected t
20. iple 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 0165 or EN 60079 14 EN 50014 50039 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 The units comply with the state of the art and must only be connected to systems which have been approved for this purpose by Extronics Caution It is prohibited for the operator or his staff to open the units This may only be done by specifically authorized personnel of Extronics Extronics limited is not liable for any subsequent damage Caution Modifications and conversions to the units are not permissible and will cause the Ex protection and the guarantee to become void Extronics limited is not liable for any subsequent damage C
21. minutes which starts when the overpressure reaches the programmed overpressure level for contact K1 Factory setting is 0 minutes i e NO purge Pressing the INFO button for the fourth time will only have effect if the temperature option is present If the option is present the LED Settings and LED Temp will light The display shows the temperature limit in at this temperature the controller will open the valve allowing cool air to enter the enclosure Pressing the INFO button again will lead you back to the K1 settings The display will automatically switch back to normal operation after ten seconds This information can be found on the inside cover of the purge controller The information can also be found in figure 4 of this manual 3 4 How to Modify Parameters In order to modify the values mentioned in section 3 3 it is necessary to select them by rotating the MENU rotary switch using a small flat blade screw drive such as a terminal driver Turning the MENU rotary switch lights each parameter LED in turn this relates to K1 K2 Purge Time and Temp With the parameter selected press OK to enter the programming procedure Now the LED Adjust flashes while the LED s of the selected parameter K1 K2 purge time or temp and LED Settings stay steady on Adjust the desired value by turning the MENU switch The value is stored by pressing OK Once the values for K1 or K2 have been programmed one of the LED s no or n
22. o an standard digital valve function n o normally open Important A standard valve mode P2 must always be mounted inside of the EEx p enclosure With Purge Sequence If the programmed purge time is greater than 0 then the programmed value appears on the display after powering up the controller The Purge LED and the numeric display flash until the internal enclosure pressure reaches the value programmed for K1 After this pressure is reached the purge time begins is count down the remaining time can be viewed on the display and the Purge LED will remain steady on during this time If the pressure falls below the value programmed for K1 during purging the counter stops and does not continue the countdown until the pressure reaches the K1 value During this time the Purge LED and the display flash again If the pressure does not reach the programmed value for more than 10 seconds the counter resets to the programmed purge time When the purge time reaches zero the display will show the measured pressure difference between enclosure and ambient Relays K1 and K2 will react on this pressure according to their respective programmed pressure value the pneumatic valve output will be pulsed to attempt to keep the internal enclosure pressure higher than the value programmed in K1 Without Purging Optional The display shows the measured pressure difference between enclosure and ambient Relays K1 and K2 will react on this pressur
23. roughput in l min Fig 10 Leakage air diagram A iS Fig 11 Adjustment of the leakage compensation nozzle Leakage Compensation Screw 19 4 5 Electrical connection 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 EE iPURGE150 standard version contact K1 contact K2 I both at floating potential i l i I I programmable nc or no O L1 N PE RE See EE pais M et Sa iPURG150 example connection with an external alarm flashlight contact K2 ii optional at floating potential l valve of type2_ _ RO See L1 N d PE E EE dE EE EE EE Fig 12 Circuit diagram for iPURGE150 controller 20 5 Intended Purpose Usage 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 The iPURGE150 EEx p controller is built using modern components and is extremely reliable in operation however it must only be used for its intended purpose Please note that the intended purpose also includes compliance with the instructions issued by the manufacturer for install
24. t 1 PE protection earth 2 3 Power Input 4 5 relay contact K1 6 7 relay contact K2 8 PE protection earth 9 10 valve voltage output Max conductor cross section for cables connected with the terminals Factory presets 4 mm K1 K2 AWG 12 3 3mm 0 8 mbar no 1 0 mbar no temperature 40 purge time 24 0 min 7 Type Codes Versions e 12 VDC 24 VDC e 24 VAC 115 VAC 230 VAC 250 VAC e with external pressure or temperature sensor e mounting inside or outside of the enclosure The type code is interpreted as follows IPURGE150 _ _ o Voltage E Mounted Externally Mounted Internally 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 microcontroller recognizes the types of sensors connected 25 8 Certification Translation 1 EC Type Examination Certificate TUV NORD 2 Equipment and protective systems intended for use in potentially explosive atmospheres Directive 94 9 EC 3 Certificate Number T V 06 ATEX 553384 4 for the equipment iPurge 150 5 ofthe manufacturer Extronics Ltd 6 Address Meridian House Roe Street GB Congleton Cheshire CW12 1PG Order number 8000553384 Date of issue 2006 09 26 7 This equipment or protective system and any acceptable variation thereto are specified in
25. ther with the associated enclosure and inlet valve provides the necessary functionality and sensors for compliance with EN50015 EN60079 14 and IEC 60079 2 Please note that the controller and valve alone do not make an enclosure suitable for deployment in a zone 2 area the enclosure must be tested in accordance with EN50015 or EN60079 14 and IEC 60079 2 3 1 System Operation The controller consists mainly of two components which must be installed separately IPURGE150 controller Air inlet kit consisting of pressure regulator pressure gauge and digital valve The controller purges the enclosure by supplying a signal to the digital valve the valve opens and allows protective gas into the enclosure The pressure and therefore the flow of gas is regulated by the pressure regulator Once purging is complete the controller the closes the valve and then monitors and regulates the overpressure in the enclosure The digital valve is equipped with a valve bypass facility which is required to compensate for the leakage of the enclosure with operating the valve Pressure Digital Valve EEx p iPURGE150 control unit regulator enclosure Fig 2 System Diagram Optionally you can expand the iPURGE150 system with the following components E Proportional valve for purging for electronic control of the enclosure pressure E External pressure sensor E External temperature sensor Import
26. uisedtest 26 9 Manual Revision alla 30 1 Introduction 1 1 General Information on Types of Protection Electrical equipment which is intended for use in a Zone 2 hazardous area as defined by ATEX regulations must be protected by one of the following protection concepts EEx d flameproof EEx e EEx i EEx n EEx p For some types of electrical equipment the type of protection EEx p is the simplest and most economical and in certain cases it is the only possible one 1 2 Pressurised Apparatus In the case of pressurised apparatus for 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 40 at least Extronics recommend IP 65 1 2 1 Operation with Initial Purging and Compensation for Leakage Losses Initially the enclosure is purged in order to remove any potentially explosive gas mixture which may be present inside the enclosure For this purpose the iPURGE150 controller activates an external purge valve the purge time can be adjusted with a freely programmable purging time counter 0 255min After the purging is complete a sufficient flow of compressed air or inert gas is introduced to compensate for any enclosure leakage and to maintain a minimum overpressure in relation to the surrounding atmosphere The minimum overpressure allowed for press
27. urised apparatus mounted in Zone 2 is 0 25 mbar 25 Pa The minimum value readable by the iPURGE150 is 0 5mbar 50 Pa this can be easily read from the display of the iPURGE150 controller The iPURGE150 also has two independently programmable volt free relay contacts which may be connected with different warning devices becons indicator lamps acoustic devices DCS PLC etc These contacts can be used to indicate that the pressurised enclosure has fallen below the minimum pressure 1 2 2 Operation with Continuous Purging In this mode the enclosure is purged continuously with compressed air or inert gas this mode is often used to dissipate the heat generated in the enclosure During purging and continuous purging operation an overpressure of at least 4 mbar is maintained with in the enclosure 1 3 iPURGE150 EEx p Controller The iPURGE150 controls the purge cycle and maintains overpressure once purging has been completed The controller is equipped with a LED display which performs two functions during normal operation displays the remaining purge time and displays the enclosure overpressure once purging has been completed Spark Arrestor An additional temperature sensor or Bypass key switch can be connected optionally to a 5 pole DIN EEx i connector Pressure Measurement Fig 1 View with removed front cover Reliable electronic design Robust acid and oil proof housing even for offshore applications certified IP
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