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User`s Manual - R. Stahl, Inc.

1. 316 Stainless Steel 8626 1 DZ 1S B 24VDC 316 Stainless Steel 8626 1 DZ 2S B 115VAC 316 Stainless Steel 8626 1 DZ 3S B 230VAC 316 Stainless Steel 8626 1 DZ 4S B 7 Purge Purge Indicator Model Number Matrix for Dust Hazardous Areas Voltage Material Model Number 12VDC 24VDC 115VAC Anodized Aluminum Anodized Aluminum Anodized Aluminum 7626 1 DZ 1A B 7626 1 DZ 2A B 7626 1 DZ 3A B 230VAC Anodized Aluminum 7626 1 DZ 4A B 12VDC 316 Stainless Steel 7626 1 DZ 1S B 24VDC 316 Stainless Steel 7626 1 DZ 2S B 115VAC 316 Stainless Steel 7626 1 DZ 3S B 230VAC 316 Stainless Steel 7626 1 DZ 4S B NOTE The equipment installation must include only one of the following gas inlet kits PSO SCD A PSO SCD S PSO MCD A PSO MCD S PSO LCD A PSO LCD S PSO SMLC A PSO SMLC S PSO MMLCS A PSO MMLC S PSO LMLC A or PSO LMLC S which are provided as part of the UL Classified Indicator PSCZ XX or PSCZ XXX Section 3 Introduction Description Type Z purging reduces the classification within a protected electronics enclosures from Division 2 or Zone 2 to nonhazardous Failure to maintain pressure within the protected enclosure shall be detected by an alarm or indicator at the electronics enclosure The dilution purge time shall be a manual operation and once the electronics e
2. PURGEX Z Purge Indicator green LED is not illuminated check to see if the electronics enclosure door is properly latched or a proper Manual Leakage Compensation Purge Gas Inlet Kit pressure regulator setting is being maintained NOTE If green light does not remain on check for the following possible problems e Purge pressure is set too low at the pressure regulator e Purge pressure is set too low at the leakage compensation valve e Electronics enclosure door is open or allowing too much leakage 32 Section 6 Documents Installation Flow Diagram 2 NOTE Purge Pressurization Systems Recommended Connections for Single Enclosure are as follows 1 Purge pressurization system should be installed for best ease of viewing any system pressure gauges and or visual alarms 2 All tubing piping and fittings should be selected and used that are suitable for the location they will be installed used and protected from damage 3 No valves shall be installed between the purge pressurization system and enclosure 4 Always refer to proper ATEX CSA IECEx NEC NFPA and UL standards for proper installation and required tests for certification of any complete purge pressurization system installed on enclosure NOTE Purge Pressurization Systems Recommended Connections for Multiple Enclosures will include the recommendations for single enclosure plus the following 1 Enclosures in series should be connected from sm
3. to be below the required 0 50 inches 2 1 25 mbar in all electronics enclosures The exhaust vent which comes as part of the PURGEX Z Purge Indicator casing can exhaust purge gas from enclosures with volumes up to 15 cubic feet 425 liters For enclosure with volumes above 15 cubic feet 425 liters and up to 200 cubic feet 5 663 liters an additional exhaust vent will be required to properly vent the larger volume of purge gas from the enclosure safely For proper selection of components for your purge application refer to the PurgeEx Interactive Product Selector which can be found on the home page of our web site www rstahl com The PURGEX Z Purge Indicator uses two different purge methods to dilute the electronics enclosure and maintain at least 0 50 inches 2 1 25 mbar continuous dilution or leakage compensation Continuous dilution is a method of maintaining pressure in an electronics enclosure in which after the electronics enclosure has been diluted below the required lower explosive limit LEL the protective gas is passed continuously through the electronics enclosure at a pressure above that of the required 0 50 inches 2 1 25 mbar and discharged to the outside atmosphere through an exhaust vent The same volume of purge gas is maintained during and after the dilution time cycle Continuous dilution is normally used for maintaining and controlling heat buildup from the electronics within the pressurized enclosure by co
4. 1 scale drawing helpful in transferring the position of the necessary mounting holes Use this after determining the optimal location for the PURGEX Z Purge Indicator Wiring Diagram Page 41 This drawing details the correct power and dry contact alarm wiring hookup 35 AYNSOTONA OL AlddNS SV9 3S9ufid LM L3 TNI SVD 3oufld AYNSOTONS 3TSNIS S IVIH31VIN 3AISO 1dX3 HIV NVHL H3 H9IT 40 HLVd AYNSOTONA LSNVHXA SVD 3Oufld YOLVOIGNI 39ufid Z YO A 36 STIVIHILYN SSHNSOTONS 3AISO 1dX3 NVH L 40 OL AlddNS SV9 e y of L3 LT TINI SV9 39ufid AVM Jdid ONILOANNOOYSLNI NOILVOIGNI OL LNIOd 3ON3H3233H 3unsS3ud 3AVH GINOHS S3lIH3S AYNSOTONA 16 1 051 SAYNSOTONA 15 SVO 39ufid YOLVOIGNI Z A 37 AYNSOTONA AYNSOTONSA ATONIS S IVIB3LLVIN LSNVHXA 3AISO ldX3 NVHL H3IAV3H HLVd NOILNTIG SVD 39ufnd HO VOIGNI 4 ZHO A LI LAINI SVD 39ufid 3HnS010N3 OL AlddNs SVO 3Oufd 38 Wav 1v ANY NOLLVOIGNI OL LNIOd 3ON3H3H3H 3unsS3ud 3AVH GINOHS 831935 NI 16 1 OSTV SAYNSOTONA SAYNSOTONS 3 ld E TOW S TVIH3 LVIN LSNVHXA SVS 39ufid 3AISO ldX3 HI
5. 5 different sizes of Increased Safety Window Kits with each size available in anodized aluminum or 316 stainless steel bezel material which can be mounted on the side top or bottom of an enclosure Model number PSO 1 32DINW A is our 1 32 Din size with anodized aluminum bezel model number PSO 1 32DINW S is our 1 32 Din size with 316 stainless steel bezel Model number PSO 1 16DINW A is our 1 16 Din size with anodized aluminum bezel model number PSO 1 16DINW S is our 1 16 Din size with 316 stainless steel bezel Model number PSO 1 8DINW A is our 1 8 Din size with anodized aluminum bezel model number PSO 1 8DINW S is our 1 8 Din size with 316 stainless steel bezel Model number PSO 1 4DINW A is our 1 4 Din size with anodized aluminum bezel model number PSO 1 4DINW S is our 1 4 Din size with 316 stainless steel bezel Model number PSO XLW A is our X Large size with anodized aluminum bezel model number PSO XLW S is our X Large size with 316 stainless steel bezel 43 Manual Leakage Compensation Purge Gas Inlet Kits Manual leakage compensation allows a higher volume of protective gas supply to be manually selected to speed up dilution of potentially flammable materials to an acceptable level permitting a more rapid application of initial power or restoration of power to protected electrical equipment after service When the dilution cycle has elapsed the large volume of purge gas can be manually turned off A volume of purge gas larger than th
6. PAN HEAD SCREW 1 4 SPLIT LOCK WASHER Y amp Z PURGE INDICATOR 1 4 FLAT WASHER 1 4 EXTERNAL TOOTH LOCK WASHER DETAIL OF GROUND CONNECTION PANEL UNIT WILL BE MOUNTED TO Figure 1 CAUTION Electrical power wiring must be checked for correct size and routing Step 9 Connect 20 AWG two conductor wire refer to Power Source Specifications refer to page 20 for alarm signal to the PURGEX Z Purge Indicator Use Wiring Diagram refer to page 41 for wire terminal strip locations Step 10 After routing and terminating the wires into the terminal strips on the PURGEX 7 Purge Indicator secure these wires using proper lead dress 16 Electrical Power Installation NOTE Refer to Power Source Specifications Power Connection table and Wiring Diagram refer to page 41 for connecting power to the PURGEX 2 Purge Indicator Power Source Specification 115 VAC Model 50 60 Hz 230 VAC Model 50 60 Hz 12 VDC Model polarity protected 24 VDC Model polarity protected Use 16 AWG stranded 3 conductor copper or tin plated copper power wire rated for at least 250 VAC of the required length WARNING This apparatus must be earth grounded Refer to Figure 1 for proper ground connection details GROUND WIRE RING TONGUE TERMINAL 1 4 20 UNC x 3 4 INCHES LONG STAINLESS STEEL PAN HEAD SCREW 1 4 SPLIT LOCK WASHER Y amp Z PURGE INDICATOR 1 4 FLAT WASH
7. of personnel or equipment damage WARNING EXPLOSION HAZARD Do not disconnect equipment unless power has been removed or the area is known to be non hazardous The following symbols are used throughout this manual to alert users to potential hazards or important information Failure to heed the warnings and cautions listed herein can lead to injury and equipment damage Document Label Definitions Used To Indicate Potential Hazards Consists of conditions practices or procedures that must be observed to prevent personal injury and or equipment damage Risk of electric shock or high temperature parts CAUTION may result in injury if proper precautions are not taken Emphasizes important or essential information Locating Information NOTE In the interest of completeness manuals and drawings D included with the system may provide information pertaining to options not included with your equipment Information in application notes supersedes general information in these documents Information can be located in this manual using any of the following aids 1 Table of Contents 2 Getting Help General Safety and Operating Information This section contains general safety and operating information applicable to electrical equipment installed within hazardous locations This information must be understood by all persons installing using or maintaining the electrical equipment This information is desi
8. the Manual Leakage Compensation Purge Gas Inlet Kit manifold block until the PURGEX Z Purge Indicator green light comes on Step 12 With the PURGEX Z Purge Indicator green light on using jam nut lock leakage compensation valve in place on the Manual Leakage Compensation Purge Gas Inlet Kit manifold block to maintain leakage compensation volume setting Step 13 With the PURGEX Z Purge Indicator green light on and the leakage compensation valve locked into place record the pressure reading on the Manual Leakage Compensation Purge Gas Inlet Kit pressure gauge The recorded pressure will be used to calculate the purge dilution time before power can be applied to electronics within the purged enclosure Only the pressure recorded when the Manual Leakage Compensation Purge Gas Inlet Kit is in the OFF position should be used to calculate the dilution time required before power can be connected to the electronics with in the enclosure Step 14 With leakage compensation purge protective gas being supplied to electronics enclosure and PURGEX Z Purge Indicator green indicator light illuminated start the manual dilution time cycle by manually turning the dilution valve on the Manual Leakage Compensation Purge Gas Inlet Kit shutoff valve to the ON position The manual dilution time delay must be long enough to ensure that at least five 5 times the volume of free space in the electronics enclosure of purge protective gas is exchanged
9. 1 R Addition of Increase Safety Window Kits and UL Certification 17 Jun 13 5 Address and Certification Changes 25 Nov 13 Certification Required Revisions 18 Sep 14 U Added Storage Temperature Range 21 May 15 Copyright Notice This document contains information proprietary to R STAHL Inc with all rights reserved worldwide Any reproduction or disclosure of this publication or any part thereof to persons other than R STAHL Inc personnel or customers is strictly prohibited except by written permission of R STAHL Inc Unauthorized use disclosure reproduction or translation of this publication will result in R STAHL Inc exercising maximum possible legal action against all persons and or organizations involved Disclaimer R STAHL Inc makes every effort to ensure the accuracy and completeness of this manual However we cannot be responsible for errors omissions or any loss of data as the results of errors or omissions We therefore make no representations or warranties with respect to the contents hereof Further R STAHL Inc reserves the right to revise this publication and to make changes in the content hereof without obligation to notify any person or organization of such revision or changes Shipment Arrival Procedures This shipment has been thoroughly inspected at the factory prior to its delivery to the carrier After the shipment is picked up by the carrier it becomes their responsibility When the shipme
10. ER 1 4 EXTERNAL TOOTH LOCK WASHER DETAIL OF GROUND CONNECTION PANEL UNIT WILL BE MOUNTED TO Figure 1 CAUTION Electrical power must be free of spikes sags surges or electrical noise 17 Hot 1 or Supply Terminal Block 1 Position 1 Neutral or Hot 2 Terminal Block 1 Or Return Position 2 Ground Earth or Chassis Terminal Block 1 Position 3 Alarm Signal Installation NOTE The PURGEX Z Purge Indicator provides a dry alarm contact for use by the customer For hook up and use the alarm contact provided by the Purge Indicator consult the following Alarm Source Specifications Alarm Connection table and Wiring Diagram refer to page 41 Alarm Source Specifications Alarm Contact is rated for 250V AC DC 150mA max Use 20 AWG solid two conductor copper or tin plated copper power wire rated for at least 300 V at the required length Alarm Connection ALARM TERMINAL TERMINAL NUMBER Loss of Purge Pressure Open on Alarm when Terminal Block 2 pressure in enclosure being monitored is below 0 50 Position 1 inches 2 or 1 25 mbar Return for position one or three Terminal Block 2 Position 2 Loss of Purge Pressure Closed on Alarm when Terminal Block 2 pressure in enclosure being monitored is below 0 50 Position 3 inches 2 or 1 25 mbar 18 Section 5 Startup Procedures Continuous Dilution Initial Startup
11. Procedure The following procedure should be performed when initially starting up a system using a Continuous Dilution purge gas inlet system and to calculate the manual dilution time for any purged electrical equipment that uses the PURGEX Z Purge Indicator to monitor the electrical equipment enclosure purge pressure WARNING Failure to heed the following information may lead to injury of personnel or equipment damage WARNING not open the electrical equipment enclosure a hazardous area even when de energized unless area has been properly tested and is known to not contain explosive materials WARNING Before initially starting the equipment electrical power wiring must be checked for correct size and routing NOTE Refer to all ATEX CSA IECEx NEC NFPA and UL certificates for any Special Conditions of Use 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 of the certificate NOTE Review all material and safety information in this manual and install in accordance with this document and all other applicable ATEX CSA IECEx NEC NFPA 496 and UL standards Step 1 Make sure that area surrounding the PURGEX Z Purge Indicator and the electronics enclosure the PURGEX Z Purge Indicator will be monitoring is known to be non hazardous 19 Step 2 After it has been as
12. PurgEx Z Purge Indicator Users Manual This page intentionally left blank Information in this document is subject to change without notice All terms mentioned in this manual that are known to be trademarks have been appropriately capitalized R STAHL Inc acknowledges all trademark s and the rights of the trademark s owned by the company referred to herein 13259 N Promenade Blvd Stafford TX 77477 Phone 800 782 4357 Website www rstahl com Release Date April 2014 Document Number DO 10011 S Copyright 2014 by R STAHL Inc All rights reserved Revision Record Rev Description Date A Initial Release 12 Aug 02 B Web Site Changes 02 Jan 03 Add 12 DC Powered Model 23 Mar 03 D Several Revisions 07 Dec 03 E Several Revisions 14 Mar 04 F Several Revisions 29 June 04 G Several Revisions 14 Dec 04 H Several Revisions 27 May 05 Added Recommended UL Power Supply Requirements 06 Jan 06 J Revised Options and Illustrations 01 Mar 06 K Revised Initial and Maintenance Start Up Procedures 13 Jan 07 L Revised Illustrations 24 Jan 08 M Revisions Per Certification Updates and New Product Offerings 23 Aug 08 N Revisions Per New Purge Gas Inlet Kits Procedures 21 Aug 09 Several Revisions 11 Nov 09 P Addition of Dust and Amended Installation Instructions 18 Nov 10 Q Removal of PURGEX Y Purge Indicator from this manual 13 Jun 1
13. Purge Indicator raise the pressure of the purge protective gas using the Continuous Dilution Purge Gas Inlet Kit pressure regulator until the PURGEX Z Purge Indicator green light comes on 20 Step 9 With the PURGEX Z Purge Indicator green light on turn off the protective gas supply to electronics enclosure at purge gas shutoff valve on the Continuous Dilution Purge Gas Inlet Kit manifold Step 10 With protective gas supply turned off at Continuous Dilution Purge Gas Inlet Kit shutoff valve record the pressure reading on the Continuous Dilution Purge Gas Inlet Kit pressure gauge The recorded pressure will be used to calculate the purge dilution time before power can be applied to electronics within the purged enclosure Only the pressure recorded when the Continuous Dilution Purge Gas Inlet Kit shutoff valve is in the OFF position should be used to calculate the dilution time required before power can be connected to the electronics with in the enclosure Step 11 After recording the pressure reading on the Continuous Dilution Purge Gas Inlet Kit pressure gauge which will be used to calculate the purge dilution time before power can be applied to electronics within the purged enclosure turn on protective gas supply to electronics enclosure by turning the Continuous Dilution Purge Gas Inlet Kit shutoff valve to the ON position Step 12 With purge protective gas being supplied to electronics enclosure and PURGEX green in
14. V NVHL H3IAV3H 40 HLVd NOIL TIO YOLVOIGNI 39ufld Z HOA SSYNSOTONA OL SV9 AVM HO 3dld LINGNOS 9NILO3NNOOHU3ANI LIINI SVD 3Oufid 39 3dIS dau 88 12 2 LN 0199 HOLVOICNI 3OHfid Z 20 gay 00611 gos v TVNINH3L AYNSOTONA 9272 8811 SAILOSLOWd NI 3 10H 66 59 852 037 OL 3415 OL 3ALLO31OHd NI SLOTS 40 NYHL 02 97 00076 ya 0688 0056 v NO 1uvdv ZZ S3OVld S dAL nuHL 807 0820 NH3 LI Vd 3 1OH ONILNNOW HOLVOIGNI 39ufid Z HO XAOYNd AO dO 41 LNAYYND XVN Yws L ZHEQ Zr OWA S9c SONILVY LOVINOO WHV IV dwy 01 2 9 2 OVA 052 SONILVY LOVINOO H3MOd Wav IV NO Q3SO0 9 ATIVNHON NOILISOd NO N3dO ATIVWNHON L NOILISOd NOISU3A OV LIOA 066 NOISHSA OV 911 LP 35018 TVNIWB3L LP 392018 IVNIWNB3L NOISU3A vc Lf A9019 TVNIAW3L SISSVHO NOILISOd OG 2 NOILISOd NOISU3A LP 35018 1 ch 42 Section 7 Options Continuous Dilution Purge Gas Inlet Kits Continuous dilution is a method of maintaining pressure in an enclosure in which after the enclosure has been pre purged the protective gas is passed continuously through the enclosure at a pressure above that of the
15. age Compensation Purge Gas Inlet Kit pressure regulator assure that the manual dilution valve on the Manual Leakage Compensation Purge Gas Inlet Kit manifold block is in the OFF position Step 7 After assuring that the manual dilution valve on the Manual Leakage Compensation Purge Gas Inlet Kit manifold block is in the OFF position make sure that the leakage compensation valve is completely closed on the Manual Leakage Compensation Purge Gas Inlet Kit manifold block Step 8 After assuring that leakage compensation valve is completely closed on the Manual Leakage Compensation Purge Gas Inlet Kit manifold block close and latch electronics enclosure door Step 9 With electronics enclosure door closed and latched apply power to electrical equipment in enclosure which should also apply power to the PURGEX Z Purge Indicator 24 WARNING DO NOT TURN POWER ELECTRICAL EQUIPMENT LOCATED IN ENCLOSURE PURGEX Z PURGE INDICATOR WILL BE MONITORING PURGE PRESSURE UNLESS AREA HAS BEEN PROPERLY TESTED AND IS KNOWN NOT TO CONTAIN EXPLOSIVE MATERIALS Step 10 With power applied to the PURGEX Z Purge Indicator turn on protective gas supply pressure at Manual Leakage Compensation Purge Gas Inlet Kit pressure regulator Step 11 With protective gas supply pressure turned on at Manual Leakage Compensation Purge Gas Inlet Kit pressure regulator and shutoff valve in the OFF position open leakage compensation valve on
16. allest to largest enclosure 2 Connections between enclosures should be properly sized to allow proper operation of purge pressurization system and proper purge gas flow through enclosures 3 Conduit and wire ways can be utilized as protected enclosures or as connections between enclosures as such volumes of conduit or wire ways should be added to overall volume to be diluted before power can be applied NOTE Purge Pressurization Systems Recommended Enclosure Installation for Hazardous Areas with Flammable Gasses or Vapors that are Lighter than Air are as follows 1 purge gas inlet supply connection should enter the enclosure near the bottom corner of the enclosure 2 As such the enclosure exhaust vent should be installed near an extreme opposite top corner of the enclosure 3 Refer to drawing number on page 35 for illustration of lighter than air single enclosure flow diagram 4 Refer to drawing on page 36 for illustration of lighter than air multiple enclosures flow diagram 33 Installation Flow Diagrams Continued NOTE Purge Pressurization Systems Recommended Enclosure 2 Installation for Hazardous Areas with Flammable Gasses or Vapors that are Heavier than Air are as follows 1 purge gas inlet supply connection should enter the enclosure near the top corner of the enclosure 2 As such the enclosure exhaust vent should be installed near an extreme opposite bottom corner of the enclosure 3 Re
17. ally applied to the electrical equipment within the enclosure being monitored by purge indicator Manual Dilution Cycle Time To Typically dilution cycle time is to ensure that at Energizing Electrical Equipment least five 5 times the volume of free space in the enclosure of protective gas supply is exchanged before power is applied to the electrical equipment Ten 10 times volumes for motors generators and other rotating electrical machinery PURGEX Z Purge Indicator Green indicator light remains on to show purge Minimum Pressure pressure being maintained above 0 50 inch 2 1 25 mbar Standard 0 30 inch 2 0 75 mbar Optional electronics enclosure being monitored WARNING The number of exchanged volumes may be higher in some situations WARNING Do not overpressure enclosure as this could damage or change factory setting of PURGEX 2 Purge Indicator pressure sensor Utility Requirements Purge Protective Gas Supply 20 psig 1 4 Bar minimum Suggested to Pressure to Pressure Regulator compensate for enclosure leak rate Water and oil free 40 F 40 C dew point particles lt 5 ISA grade hydrocarbon free Purge Protective Gas Supply Quality 0 5 Watts maximum 12 Volt model 12 VDC 24 Volt model 24 VDC 115 Volt model 115 VAC 50 60 Hz 230 Volt model 230 VAC 50 60 Hz Mains Supply Fluctuation Not to Exceed 10 Environmental Conditions Operating Tempera
18. ature rating of 40 F to 176 F 40 C to 80 C 45 Section 8 Getting Help Getting Help Answers to many questions concerning the PURGEX Z Purge Indicator or any of our other products we offer can be found in this manual If a problem or question is encountered that is not covered in the documentation provided assistance is available Monday through Friday except holidays from 8 a m to 5 p m United States central time To obtain assistance please call R STAHL Inc at 800 782 4357 For assistance during times other than normal business hours consult our World Wide Web Internet site at http www rstahl com This site includes equipment information news releases and other information E mail can be sent to sales rstahl com
19. before power can be manually applied to the electrical equipment inside the purged enclosure 25 Step 15 WARNING The number of exchanged volumes may be higher some situations NOTE If you are using one of R STAHL Inc Manual Leakage Compensation Purge Gas Inlet Kits to supply purge gas to enclosure the PURGEX 2 Purge Indicator will be monitoring refer to STAHL Inc web site to use Dilution Time Software to calculate manual dilution time for your size enclosure The Dilution Software can only be used if you are using a R STAHL Inc Manual Leakage Compensation Purge Gas Inlet Kit as the Dilution Time Software calculations are based data from test performed on R STAHL Inc Manual Leakage Compensation Purge Gas Inlet Kits and proprietary exhaust vents After the manual dilution time has elapsed manually turn the Manual Leakage Compensation Purge Gas Inlet Kit shutoff valve to the OFF position Allowing only enough purge gas volume into the now protected enclosure to maintain a pressure above the required 0 50 inches 2 1 25 mbar through the leakage compensation valve port Step 16 After a manual dilution time has been established the manual dilution time and Manual Leakage Compensation Purge Gas Inlet Kit regulator gauge pressure reading should be recorded for used during any future maintenance or service of the purge enclosure being monitored by the PURGEX Z Purge Indicator 2 NOTE If purge pressur
20. dicator light illuminated start the manual dilution time cycle The manual dilution time cycle must be long enough to ensure that at least five 5 times the volume of free space in the electronics enclosure of purge protective gas is exchanged before power can be manually applied to the electrical equipment inside the purged enclosure NOTE If you are using one of R STAHL Inc Continuous Dilution Purge Gas Inlet Kits to supply purge gas to an enclosure the PURGEX 2 Purge Indicator is monitoring refer to STAHL Inc web site to use Dilution Time Software to calculate dilution time for your size enclosure The Dilution Software can only be used if you are using a R STAHL Inc Continuous Dilution Purge Gas Inlet Kit as the Dilution Time Software calculations are based on empirical test performed with R STAHL Inc Continuous Dilution Purge Gas Inlet Kits and proprietary exhaust vents 21 NOTE The dilution time cycle can be reduced by increasing the pressure of purge gas being supplied the enclosure Start at Step 9 and increase the pressure being read on the Continuous Dilution Purge Gas Inlet Kit pressure regulator Use the new pressure reading to calculate a lower dilution time repeating until an appropriate dilution time is reached WARNING The number of exchanged volumes may be higher in some situations Step 13 After a manual dilution time has been established the manual dilution time and Continuous Dil
21. e 5 times the volume of free space in the electronics enclosure of purge protective gas is exchanged before power can be manually applied to the electrical equipment in the purged enclosure WARNING The number of exchanged volumes may be higher in some situations NOTE The manual dilution time and Continuous Dilution Purge Gas Inlet Kit regulator pressure should remain the same as what was established during the Continuous Dilution Initial Startup Procedure Step 7 After the manual time cycle has elapsed power can then be apply to the electrical equipment in the purged electronics enclosure 28 Step 8 After power has been applied to the electrical equipment in the purged electronics enclosure the PURGEX Z Purge Indicator green LED should be illuminated indicating the required 0 50 inches 2 1 25 mbar pressure is being maintained within the now protected enclosure Step 9 If power has been applied to the electrical equipment in the purged electronics enclosure and the PURGEX Z Purge Indicator green LED is not illuminated check to see if the electronics enclosure door is properly closed and latched or a proper Continuous Dilution Purge Gas Inlet Kit pressure regulator setting is being maintained NOTE If green light does not remain on check for the following possible problems e Purge pressure is set too low at the pressure regulator e Enclosure door is open or allowing too much leakage e Continuous Di
22. e becomes less than 0 50 inches 2 1 25 mbar the PURGEX 2 Purge Indicator does not shuts off power to the electrical equipment it has been monitoring it will only alarm 26 Continuous Dilution Maintenance or Service Shutdown and Startup Procedure The following procedure should be performed when shutting down and re starting any purged electrical equipment that uses a Continuous Dilution Purge Gas Inlet Kit and the PURGEX Z Purge Indicator to monitor the electronic equipment enclosure purge pressure which requires maintenance or service WARNING Failure to heed the following information may lead to injury of personnel or equipment damage CAUTION Do not open the electrical equipment enclosure in a hazardous area even when de energized unless area has been properly tested and is known to not contain explosive materials WARNING Applicable permits must be obtained and appropriate precautions must be taken to prevent possible injury to personnel or equipment damage when installing the PURGEX 2 Purge Indicator CAUTION Electrical equipment components may be hot even when power is not applied Take appropriate precautions to prevent injury from contact with hot items Step 1 Properly disconnect power from all purged enclosure electronics that uses the PURGEX Z Purge Indicator to monitor the electronics enclosure purge pressure which requires maintenance or servicing Step 2 After power has been disconnect
23. e gas supply at the Manual Leakage Compensation Purge Gas Inlet Kit shutoff valve Not at the Manual Leakage Compensation Purge Gas Inlet Kit pressure regulator The pressure regulator setting should remain the same to keep the purge gas CFM LPM the same as what was established during the initial manual dilution time set up 30 Step 3 With power disconnected and purge gas supply properly shut off the electronics enclosure door may now be opened and maintenance or service can begin CAUTION Electrical equipment components may be hot even when power is not applied Take appropriate precautions to prevent injury from contact with hot items Step 4 After maintenance or servicing have been completed properly close and latch electronics enclosure door Step 5 After electronics enclosure door has been properly closed and latched turn on purge gas supply to electronics enclosure using the Manual Leakage Compensation Purge Gas Inlet Kit shutoff valve Manual Leakage Compensation Purge Gas Inlet Kit pressure regulator setting should remain the same to keep the purge gas CFM LPM the same as what was established during the initial manual leakage compensation dilution time set up Step 6 With purge gas being supplied to the Manual Leakage Compensation Purge Gas Inlet Kit start the manual dilution time cycle by manually turning the Manual Leakage Compensation Purge Gas Inlet Kit shutoff valve to the ON position The manual leaka
24. e leak rate of the enclosure will be introduced into the now protected enclosure to maintain at least 0 20 inches H2O 0 50 mbar R STAHL Inc offers three sizes of leakage compensation models the first size is our Small Manual Leakage Compensation Purge Gas Inlet Kit for enclosures with a volume up to 15 cubic feet 425 liters Model number PSO SMLC A is our small aluminum version and model number PSO SMLC S is our small stainless steel version Purge gas supply inlet to Small Manual Leakage Compensation Purge Gas Inlet Kit regulator is 1 4 18 FNPT The second size we offer is our Medium Manual Leakage Compensation Purge Gas Inlet Kit for enclosures with volumes up to 75 cubic feet 2 125 liters Model number PSO MMLC A is our medium aluminum version and model number PSO MMLC S is our large stainless steel version Purge gas supply inlet to Medium Manual Leakage Compensation Purge Gas Inlet Kit regulator is 1 2 14 FNPT The third size we offer is our Large Manual Leakage Compensation Purge Gas Inlet Kit for enclosures with volumes up to 200 cubic feet 5 663 liters Model number PSO LMLC A is our large aluminum version and model number PSO LMLC S is our large stainless steel version Purge gas supply inlet to Large Manual Leakage Compensation Purge Gas Inlet Kit regulator is 1 2 14 FNPT All Leakage Compensation Purge Gas Inlet Kits include input fittings regulator gauge and manifold block Back Up Vents To protect the enclosure from
25. ed from the electronics within protective enclosure shut off purge gas supply at the Continuous Dilution Purge Gas Inlet Kit shutoff valve Not at the Continuous Dilution Purge Gas Inlet Kit pressure regulator The Continuous Dilution Purge Gas Inlet Kit pressure regulator setting should remain the same to keep the purge gas CFM LPM the same as what was established during the initial manual dilution time set up 27 Step 3 With power disconnected and purge gas supply properly shut off the electronics enclosure door may now be opened and maintenance or service can begin CAUTION Electrical equipment components may be hot even when power is not applied Take appropriate precautions to prevent injury from contact with hot items Step 4 After maintenance and or servicing have been completed properly close and latch electronics enclosure door Step 5 After electronics enclosure door has been properly closed and latched turn on purge gas supply to electronics enclosure using the Continuous Dilution Purge Gas Inlet Kit shutoff valve Continuous Dilution Purge Gas Inlet Kit pressure regulator setting should remain the same to keep the purge gas CFM LPM the same as what was established during the initial manual dilution time set up Step 6 With purge protective gas being supplied to the electronics enclosure begin the manual dilution time cycle The manual dilution time cycle must be long enough to ensure that at least fiv
26. fer to drawing number on page 37 for illustration of heavier than air single enclosure flow diagram 4 Refer to drawing number on page 38 for illustration of heavier than air multiple enclosures flow diagram Page 35 Helpful in selecting optimal location for mounting the PURGEX Z Purge Indicator on single enclosure applications with respect to the position of the purge system components for lighter than air hazardous materials Page 36 Helpful in selecting optimal location for mounting the PURGEX Z Purge Indicator on multiple enclosure applications with respect to the position of the purge system components for lighter than air hazardous materials Page 37 Helpful in selecting optimal location for mounting the PURGEX Z Purge Indicator on single enclosure applications with respect to the position of the purge system components for heavier than air hazardous materials Page 38 Helpful in selecting optimal location for mounting the PURGEX Z Purge Indicator on multiple enclosure applications with respect to the position of the purge system components for heavier than air hazardous materials Dimensional General Assembly Page 39 A dimensioned drawing of the PURGEX Z Purge Indicator Use for determining the optimal mounting location for the PURGEX Z Purge Indicator and what area is required in enclosure it will be mounted 34 Mounting Hole Template Page 40 A dimensioned drawing for creating a 1 to
27. ge compensation dilution time cycle must be long enough to ensure that at least five 5 times the volume of free space in the enclosure of purge protective gas is exchanged before power can be manually applied to the electrical equipment in the purged enclosure WARNING The number of exchanged volumes may be higher in some situations NOTE The manual leakage compensation dilution time and Manual Leakage Compensation Purge Gas Inlet Kit regulator pressure should remain the same as what was established during the manual leakage compensation initial startup procedure 31 Step 7 After the manual leakage compensation dilution time has elapsed turn the Manual Leakage Compensation Purge Gas Inlet Kit shutoff valve to the OFF position Allowing only enough purge gas volume into the now protected enclosure to maintain a pressure above the required 0 50 inches 2 1 25 mbar from the leakage compensation valve port Step 8 After the manual leakage compensation time cycle has elapsed power can then be applied to the electrical equipment in the purged enclosure Step 9 After power has been applied to the electrical equipment in the purged enclosure the PURGEX Z Purge Indicator green LED should be illuminated indicating the required 0 50 inches 2 1 25 mbar pressure is being maintained within the now protected enclosure Step 10 If power has been applied to the electrical equipment in the purged enclosure and the
28. gned to aid personnel in safe installation operation and maintenance of the PURGEX Z Purge Indicator It is not designed to replace or limit appropriate safety measures applicable to work performed by personnel Any additional safety and operating measures that are required must be determined by and followed by personnel performing work on the electrical equipment WARNING Deviation from the specified instruction or procedure steps can result in injury to personnel equipment malfunction and or equipment damage WARNING Return unit to factory for any repairs or replacement of parts customer not permitted This will void all warranties and hazardous area certification s General Precautions Protective eyewear glasses with side shields or goggles as appropriate must be worn when servicing any part of electrical equipment Hot components should be allowed to cool before servicing if possible Other appropriate equipment or clothing must be used as required by the type of work performed All applicable regulations and procedures must be followed for the work performed Before beginning any work on the equipment carefully consider all the potential hazards and ensure that appropriate measures are taken to prevent injury to personnel or equipment damage CAUTION Electrical equipment components may be hot even when power is not applied Take appropriate precautions to prevent injury from contact with hot items CAUTION Applicable
29. ithin a hazardous location The protective gas purge supply must be clean dry and free from hydrocarbons or corrosive materials A NOTE Electrical equipment may use purging to ensure safe NOTE This devise is a purge pressurized indicator intended to be mounted to an enclosure that would need to be fully evaluated to NFPA 496 For correct installation and assembly refer to NFPA 496 2013 Edition WARNING Substitution of components may impair suitability for Division 2 NOTE This equipment is suitable for use in Class I Division 2 Group A B amp D Class Il Division 2 Group amp Class Hazardous Location or unclassified locations Section 2 Specifications Features and Certifications Certified for installation and use in ATEX IECEx and CE Type Z Purge Il 3 G Ex nA ic pz IIC T6 Gc For Zone 2 gas hazardous areas Type Z Purge Il D Ex tc T79 C Dc IP66 For Zone 2 dust hazardous areas ATEX Certificate Number DNV 14 ATEX 5461X IECEx Certificate Number IECEx DNV 14 0029X Standards IEC EN 60079 0 IEC EN 60079 2 IEC EN 60079 15 and IEC EN 60079 31 Certified for installation and use to CSA NEC NFPA and UL for Type Z Purge Class I Division 2 Group A B C amp D T6 gas hazardous areas Type Z Purge Class 11 Division 2 Group amp T6 dust hazardous areas Monitors one pressure point Normal Operating Conditions Manu
30. let Kit for enclosures with a volume up to 15 cubic feet 425 liters a Medium Leakage Compensation Purge Gas Inlet Kit for enclosures with volumes up to 75 cubic feet 2 125 liters and a Large Leakage Compensation Purge Gas Inlet Kit for enclosures with volumes up to 200 cubic feet 5 663 liters All three Small Medium and Large Leakage Compensation Purge Gas Inlet Kits are available in materials of anodized aluminum or 316 stainless steel For installations that require a back up pressure relief vent for the purged enclosure R STAHL Inc offers three sizes of back up pressure relief vent kits A Small Back Up Vent for enclosures with a volume up to 15 cubic feet 425 liters Medium Back Up Vent for enclosures with volumes up to 75 cubic feet 2 125 liters and a Large Back Up Vent for enclosures with volumes up to 200 cubic feet 5 663 liters All three Small Medium and Large Back Up Vents are constructed of 316 stainless steel with an option of mounting on the top or side of an enclosure For purged electronic enclosures monitored by a PURGEX Z Purge Indicator which has electrical components with higher surface temperatures than the temperature class of the hazardous area in which the electrical equipment is located STAHL offers a Back Up Purge Gas Kit which is used in the event that the initial protective gas supply is lost a back up source of bottled protective gas is automatically applied to the protected enclosure Electrical equip
31. lution Purge Gas Inlet Kit shutoff valve has not been put in the ON position 29 Manual Leakage Compensation Maintenance or Service Shutdown and Startup Procedure The following procedure should be performed when shutting down and re starting any purged electrical equipment that uses a R STAHL Inc Manual Leakage Compensation Purge Gas Inlet Kit and the PURGEX Z Purge Indicator to monitor the electronics enclosure purge pressure which requires maintenance or service WARNING Failure to heed the following information may lead to injury of personnel or equipment damage CAUTION Do not open the electrical equipment enclosure in a hazardous area even when de energized unless area has been properly tested and is known to not contain explosive materials WARNING Applicable permits must be obtained and appropriate precautions must be taken to prevent possible injury to personnel or equipment damage when installing the PURGEX 2 Purge Indicator CAUTION Electrical equipment components may be hot even when power is not applied Take appropriate precautions to prevent injury from contact with hot items Step 1 Properly disconnect power from all purged enclosure electronics that uses the PURGEX Z Purge Indicator to monitor the electronics enclosure purge pressure which requires maintenance or servicing Step 2 After power has been disconnected from the electronics within the protected electronics enclosure shut off purg
32. ment protected with this feature is allowed to cool adequately while preventing the ingress of flammable materials in the surrounding atmosphere from entering into the electronics enclosure as long as positive pressure is maintained For purged enclosures using the Back Up Purge Gas Kits a Protective Gas Loss Indicator can be installed for remote protective bottled gas purge supply monitoring By installing a Protective Gas Loss Indicator on the protective back up bottled purge gas supply line an alarm signal will be sent if the protective back up bottled purge gas supply has been depleted when bottled gas is used as a back up gas source WARNING Failure to heed the following information may lead to injury of personnel or equipment damage CAUTION Electrical equipment components may be hot even when power is not applied Take appropriate precautions to prevent injury from contact with hot items 12 WARNING Failure to allow adequate cooling of electrical equipment components with hot surfaces before opening the purged enclosure can lead to injury of personnel or equipment damage For applications where thermal management of electrical cabinets and control panels are required R STAHL Inc offers Vortex Cabinet Cooler Systems which provide cooling capacities for your application and maintain a NEMA 4 or 4X IP66 rating for installation and use in hazardous area Contact your local R STAHL Inc representative or the factory fo
33. nclosure has been purged of ignitable or flammable concentrations only positive pressure setting of at least 0 50 inches 2 1 25 mbar is required to be maintained within the electronics enclosure and it is not necessary to remove power from the protected equipment upon the loss of purge pressure The PURGEX Z Purge Indicator is used to provide safe monitoring of electrical equipment in Division 2 and Zone 2 hazardous areas which can be used to prevent the possibility of fire or explosion inside the enclosure of energized electrical equipment a protective gas supply is used to dilute potentially flammable materials to an acceptable level creating a safe area for the electrical equipment within the enclosure Positive pressure prevents the ingress of flammable materials in the surrounding atmosphere from entering into the enclosure as long as positive pressure is maintained After the enclosure is purged power may be manually applied to the protected electrical equipment The PURGEX Z Purge Indicator provides an objective evidence of the presence of adequate positive purge pressure within the electrical equipment enclosure A normally open differential pressure switch continuously compares the pressure inside the monitored electronics enclosure with respect to the atmospheric pressure surrounding the electronics enclosure When the monitored electronics enclosure register s a pressure of at least 0 50 inches 2 1 25 mbar above the
34. nt arrives make certain that it is undamaged and complete Patent Notice Manufactured under United States Worldwide Patents and Patents Pending Trademark Information R STAHL Inc and its logo s are trademark s of R STAHL Inc Table of Contents Legal Notices and Revision History Inside front cover Section 1 How To Use This Manual Safety Considerations Label Definition Table Locating Information General Safety General Precautions Electrical Power System Location Purge Systems Section 2 Specifications Features Table Normal Operating Conditions Table Utility Requirements Table Environmental Conditions Table Model Number Matrix Tables Section 3 Introduction Description Section 4 Installation Mounting Electrical Power Installation Power Source Table Power Connection Table Alarm Signal Installation Alarm Source Table 13 13 16 16 17 17 17 Alarm Connection Table Section 5 Start Up Procedures Initial Start Up Maintenance or Service Shut Down and Start Up Procedure Section 6 Documents Drawing Flow Diagrams Drawing Dimensional General Assembly Drawing Mounting Hole Template Drawing Wiring Diagram Section 7 Options Section 8 Getting Help 18 18 29 32 35 39 40 41 42 45 Section 1 How to Use This Manual Safety Considerations This chapter includes important information that must be read and
35. ntinuously exchanging purge gas through the electronics enclosure to atmosphere STAHL offers three sizes of continuous dilution models a Small Continuous Dilution Purge Gas Inlet Kit for enclosures with a volume up to 15 cubic feet 425 liters a Medium Continuous Dilution Purge Gas Inlet Kit for enclosures with volumes up to 75 cubic feet 2 125 liters and a Large Continuous Dilution Purge Gas Inlet Kit for enclosures with volumes up to 200 cubic feet 5 663 liters All three Small Medium and Large Continuous Dilution Purge Gas Inlet Kits are available in materials of anodized aluminum or 316 stainless steel 11 The second purge method offered by R STAHL Inc leakage compensation which allows a higher volume of protective gas supply to be manually selected to speed up dilution time of potentially flammable materials to an acceptable level permitting a more rapid application of initial power or restoration of power to protected electrical equipment after service When the dilution cycle has elapsed the large volume of purge gas can be manually turned off A volume of purge gas larger than the leak rate of the electronics enclosure will be introduced into the now protected electronics enclosure to maintain at least 0 50 inches 2 1 25 mbar Leakage compensation is normally used to conserve purge gas when utilities are at a premium R STAHL Inc offers three sizes of leakage compensation models a Small Leakage Compensation Purge Gas In
36. over pressure R STAHL Inc offers three sizes of back up vents The first size is our Small Back Up Vent for enclosures with a volume up to 15 cubic feet 425 liters Model number PSO SBUV S is our small side mount version and model number PSO SBUV T is our small top mount version The second size we offer is our Large Back Up Vent for enclosures with volumes up to 75 cubic feet 2 125 liters Model number PSO MBUV S is our medium side mount version and model number PSO MBUV T is our medium top mount version The third size we offer is our Large Back Up Vent for enclosures with volumes up to 200 cubic feet 5 663 liters Model number PSO LBUV S is our large side mount version and model number PSO LBUV T is our large top mount version All Back Up Vents have a cracking pressure between 0 8 to 1 0 Inch 2 2 0 to 2 5 mbar are constructed of 316 stainless steel and come with all mounting hardware 44 Vortex Cabinet Cooler Systems For applications where thermal management of electrical cabinets and control panels are required R STAHL Inc offers Vortex Cabinet Cooler Systems which provide cooling capacities for your application and maintain a NEMA 4 or 4X IP66 rating for installation and use in hazardous area Contact your local R STAHL Inc representative or the factory for sizing of system and installation information 2 NOTE There special modifications and sizing requirements to be made before Vortex Cabinet Cooler
37. permits must be obtained and appropriate precautions must be taken to prevent possible injury to personnel or equipment damage when installing or maintaining this equipment Electrical Power The PURGEX Z Purge Indicator uses AC power of 115 or 230 volts and DC power of 12 or 24 The AC power is converted to DC Appropriate precautions must be taken to prevent sparks that may ignite combustible materials that may be present in the Purge Indicator s environment Precautions must also be taken to prevent electrical shock if the electrical equipments enclosure being monitored by the PURGEX Z Purge Indicator is opened The power to the PURGEX Z Purge Indicator must be free from noise surges sags and spikes for proper operation of the purge indicator AC power circuit breakers and wiring must be sized properly for the required current All wiring installations must meet applicable electrical codes System Location The PURGEX Z Purge Indicator must not be installed in an area classification for which it is not rated and must be protected from temperature extremes and potentially high vibration The PURGEX Z Purge Indicator must be attached securely and appropriately to the wall of the electrical equipment s enclosure being monitored per the mounting instructions page 13 and mounted in a location to permit adequate viewing of green indicator light and to permit proper purge exhaust venting Purge Systems operation when installed w
38. r sizing of system and installation information NOTE There are special modifications and sizing requirements to be made before Vortex Cabinet Coolers are able to be installed and used in a hazardous area NOTE In the interest of completeness included in this manual with the PURGEX 2 Purge Indicator information is additional information pertaining to options not included with your equipment For purged and or increased safety enclosure that require viewing of components mounted within the enclosure R STAHL Inc offers Increased Safety Window Kits in 5 different window viewing sizes with bezels available in anodized aluminum or 316 stainless steel 13 Section 4 Installation WARNING Before attempting to install the PURGEX 2 Purge Indicator review all the material and all safety information in this manual and all other applicable documents WARNING Applicable permits must be obtained and appropriate precautions must be taken to prevent possible injury to personnel or equipment damage when installing the PURGEX 2 Purge Indicator NOTE Refer to all ATEX CSA IECEx NEC NFPA and UL certificates for any Special Conditions of Use 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 of the certificate NOTE Review all material and safety information in this manual and install in acco
39. rately locate the mounting holes Use the Mounting Hole Template to draw and print a 1 to 1 scale drawing Tape the 1 to 1 drawing to the outside of enclosure The required hole locations can then be transferred and or marked using the centers of the holes as shown on the 1 to 1 drawing Step 5 Drill or punch all holes per the sizes and locations specified on the Mounting Hole Template refer to page 40 Step 6 Before mounting the PURGEX Z Purge Indicator install the o ring provided into its appropriate groove Next line PURGEX Z Purge Indicator on the outside of enclosure aligning the PURGEX Z Purge Indicator to the mounting holes produced in Step 5 Step 7 Using the five 5 each stainless steel 1 4 20 UNC x 1 2 long screws flat and split lock washers provided mount the PURGEX Z Purge Indicator to enclosure Tighten bolts until the o ring seal is completely compressed against the surface of the enclosure which will about 5 Foot Pound 6 7 Meter Newton using a 3 Phillips head tool Step 8 Connect 16 AWG three conductor wire refer to Power Source Specifications refer to page 16 for power to the PURGEX Z Purge Indicator Use Wiring Diagram refer to page 41 for wire terminal strip locations CAUTION This apparatus must be earth grounded Refer to Figure 1 for proper ground connection detail 15 GROUND WIRE RING TONGUE TERMINAL 1 4 20 UNC x 3 4 INCHES LONG STAINLESS STEEL
40. rdance with this document and all other applicable ATEX CSA IECEx NEC NFPA 496 and UL standards Mounting Review all of the material in this manual prior to installing the PURGEX Z Purge Indicator to the enclosure it will be monitoring If you have any questions please contact your local R STAHL Inc representative or the factory refer to Getting Help page 45 For installing the PURGEX Z Purge Indicator to an enclosure and for attaching and routing of wires for power and alarm signals refer to Installation Flow Diagrams refer to page 35 Dimensional General Assembly refer to page 39 Mounting Hole Template refer to page 40 and Wiring Diagram refer to page 41 Step 1 sure that area surrounding the enclosure to be monitored by the PURGEX Z Purge Indicator is known to be non hazardous Step 2 Make sure that all power is removed from the electrical equipment located in the enclosure where the PURGEX Z Purge Indicator will be installed 14 Step 3 Choose a mounting location for the PURGEX Z Purge Indicator on the enclosure in a location farthest from the protective supply gas inlet in order to allow proper enclosure dilution refer to Installation Flow Diagrams refer to page 35 for possible mounting location The chosen location should also permit adequate viewing of the green indicator light and proper purge exhaust venting Step 4 Use Mounting Hole Template refer to page 40 to accu
41. reference atmospheric pressure a manually controlled dilution time cycle may then begin Typically a minimum dilution time cycle is specified to ensure that at least five times the volume of free space in the electronics enclosure is exchanged before power is manually applied to the electrical equipment The number of exchanged volumes may be higher in some situations After the manual dilution time cycle has elapsed and the monitored electronics enclosure pressure is being maintained above 0 50 inches 2 1 25 mbar power may be manually applied to the electrical equipment within the purged electronics enclosure 10 The PURGEX Z Purge Indicator is designed to indicate the presence of purge pressure from one pressure reference point Several electronics enclosures can be installed in series with purge gas being introduced into the first electronics enclosure and the PURGEX Z Purge Indicator monitoring the last electronics enclosure in the series multiple electronics enclosures can now be monitored using only one PURGEX Z Purge Indicator The pressure inside the monitored electronics enclosures must maintain at least 0 50 inches 2 1 25 mbar higher than the atmospheric pressure surrounding the electronics enclosure This ensures that hazardous materials are not going to ingress into the pressurized and now protected electronics enclosures If any of the electronics enclosures installed in the series door is opened pressure will show
42. s are able to be installed and used in a hazardous area Back Up Purge Gas Kit In the event the initial protective purge gas supply is lost this kit insures that a back up source of protective purge gas is automatically applied to the protected enclosure R STAHL Inc model number PSO BUPG K has inlets and outlet which are 3 8 18 FNPT NOTE The Back Up Purge Gas Kit requires a minimum air supply pressure of 80 psig to function properly Protective Gas Loss Indicator Kit An explosion proof differential pressure switch may be installed to provide an alarm contact output signal to indicate the loss of primary purge gas supply While a second can be installed to provide loss of back up purge gas Model number is PSO PGLI K Differential Pressure Gauge Kits R STAHL Inc also offers an all stainless steel Differential Pressure Gauge Kit which can be mounted on the side top or bottom of an enclosure Model number PSO DPG L is our left side mount version model number PSO DPG R is our right side mount version model number PSO DPG T is our top mount version and model number PSO DPG B is our bottom mount version Increased Safety Enclosures R STAHL Inc also offers Increased Safety Enclosures that are available in powder coated carbon steel 304 or 316 stainless steel in over 60 standard sizes or we can build a custom enclosure to your specifications All have an 66 NEMA 4 ingress protection rating and an ambient temper
43. specified minimum and discharged to the outside atmosphere through an exhaust vent The same volume of purge gas is maintained during and after the dilution cycle R STAHL Inc offers three sizes of continuous dilution models the first size is our Small Continuous Dilution Purge Gas Inlet Kit for enclosures with a volume up to 15 cubic feet 425 liters Model number PSO SCD A is our small aluminum version and model number PSO SCD S is our small stainless steel version Purge gas supply inlet to Small Continuous Dilution Purge Gas Inlet Kit regulator is 1 4 18 FNPT The second size we offer is our Medium Continuous Dilution Purge Gas Inlet Kit for enclosures with volumes up to 75 cubic feet 2 125 liters Model number PSO MCD A is our medium aluminum version and model number PSO MCD S is our medium stainless steel version Purge gas supply inlet to Medium Continuous Dilution Purge Gas Inlet Kit regulator is 1 2 14 FNPT The third size we offer is our Large Continuous Dilution Purge Gas Inlet Kit for enclosures with volumes up to 200 cubic feet 5 663 liters Model number PSO LCD A is our large aluminum version and model number PSO LCD S is our large stainless steel version Purge gas supply inlet to Large Continuous Dilution Purge Gas Inlet Kit regulator is 1 2 14 FNPT All Continuous Dilution Purge Gas Inlet Kits include input fittings regulator gauge bracket and mounting hardware Increased Safety Window Kits R STAHL Inc also offers
44. stem is subject to special conditions for safe use specified in the schedule of the certificate NOTE Review all material and safety information in this manual and install in accordance with this document and all other applicable ATEX CSA IECEx NEC NFPA 496 UL standards Make sure that area surrounding the PURGEX Z Purge Indicator and the electronics enclosure the PURGEX Z Purge Indicator will be monitoring is known to be non hazardous Step 2 After assuring area surrounding the PURGEX Z purge Indicator and the electronics enclosure the PURGEX Z Purge Indicator will be monitoring is known to be non hazardous open electronics enclosure door 23 Step 3 After opening electronics enclosure door install Manual Leakage Compensation Purge Gas Inlet Kit per installation instructions located in Purge Gas Inlet Kits User s Manual Step 4 With electronics enclosure door still open turn on purge protective gas supply to electronics enclosure by turning the Manual Leakage Compensation Purge Gas Inlet Kit shutoff valve to the ON position and verify that enclosure is being supplied with purge gas Step 5 After it has been verified that the enclosure is being supplied with purge gas turn off purge gas supply pressure to electronics enclosure at Manual Leakage Compensation Purge Gas Inlet Kit pressure regulator Step 6 With protective gas supply pressure to electronics enclosure turned off at Manual Leak
45. sured that area surrounding the PURGEX Z purge Indicator and the electronics enclosure the PURGEX Z Purge Indicator will be monitoring is known to be non hazardous open electronics enclosure door Step 3 After opening electronics enclosure door install Continuous Dilution Purge Gas Inlet Kit per installation instructions located in Purge Gas Inlet Kits Users Manual Step 4 With electronics enclosure door still open turn on purge protective gas supply to electronics enclosure by turning the Continuous Dilution Purge Gas Inlet Kit shutoff valve to the ON position and verify that enclosure is being supplied with purge gas Step 5 After it has been verified that the enclosure is being supplied with purge gas turn off purge gas supply pressure to electronics enclosure at Continuous Dilution Purge Gas Inlet Kit pressure regulator Step 6 With protective gas supply pressure off at Continuous Dilution Purge Gas Inlet Kit regulator close and latch electronics enclosure door Step 7 With electronics enclosure door closed and latched apply power to electrical equipment in enclosure which should also apply power to the PURGEX Z Purge Indicator WARNING DO NOT TURN ON POWER TO ELECTRICAL EQUIPMENT LOCATED IN ENCLOSURE PURGEX Z PURGE INDICATOR WILL BE MONITORING PURGE PRESSURE UNLESS AREA HAS BEEN PROPERLY TESTED AND IS KNOWN NOT TO CONTAIN EXPLOSIVE MATERIALS Step 8 With power applied to the PURGEX Z
46. ture Range 40 F to 150 F 40 C to 65 C Storage Temperature Range 58 F to 167 F 50 C to 75 C Used and Mounted For Indoor and Outdoor Use Power Input Consumption Voltage PURGEX Z Purge Indicator Casing Material Specifications Anodized Aluminum Weight 2 48 lbs 1 13 kg 316 Stainless Steel Weight 6 70 lbs 3 04 kg Anodized Aluminum Protection NEMA 4 IP66 316 Stainless Steel Protection NEMA 4X IP66 NOTE STAHL Inc is NOT responsible for any misuse or improper installation of product assumes no liability for special or consequential damages caused by use or misuse or improper installation of its products sold and assumes no liability for injury from use or misuse or improper installation of its products or attached products NOTE PURGEX Z Purge Indicator o ring shall not exceed 150 65 C ambient temperature when used in for Class Division 2 applications WARNING Do not overpressure enclosure as this could damage or change factory setting of PURGEX 2 Purge Indicator pressure sensor Pressure sensor burst pressure is approximately 5 psig 0 31 bar PurgEx 7 Purge Purge Indicator Model Number Matrix for Gas Hazardous Areas Material Model Number 115VAC Anodized Aluminum Anodized Aluminum Anodized Aluminum 8626 1 DZ 1A B 8626 1 DZ 2A B 8626 1 DZ 3A B 230VAC Anodized Aluminum 8626 1 DZ 4A B 12VDC
47. understood by all persons installing using or maintaining this equipment While this manual is designed to aid personnel in the correct and safe installation operation and maintenance of the systems described Personnel must consider all actions and procedures for potential hazards or conditions that may not have been anticipated in the written procedures Ifa procedure cannot be performed safely it must not be performed until appropriate actions can be taken to ensure the safety of equipment and personnel The procedures in this manual are not designed to replace or supersede required or common sense safety practices All safety warnings listed in any documents applicable to equipment and parts used in or with the system described in this manual must be read and heeded before commencing work on any part of the system 2 NOTE Refer to all ATEX CSA IECEx NEC NFPA and UL certificates for any Special Conditions of Use 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 of the certificate NOTE Review all material and safety information in this manual and install in accordance with this document and all other applicable ATEX CSA IECEx NEC NFPA 496 and UL standards WARNING Failure to follow appropriate safety procedures or inappropriate use of the equipment described in this manual can lead to injury
48. ution Purge Gas Inlet Kit regulator gauge pressure reading should be recorded for used during any future maintenance and or service of the purge enclosure being monitored by the PURGEX Z Purge Indicator NOTE If purge pressure becomes less than 0 50 inches H20 1 25 2 mbar the PURGEX Z Purge Indicator does not disconnect power to the electrical equipment within the enclosure it has been monitoring it will only alarm 22 Manual Leakage Compensation Initial Startup Procedure The following procedure should be performed when initially starting up a system using a R STAHL Inc Manual Leakage Compensation Purge Gas Inlet Kit and to calculate the dilution time for any purged electrical equipment that uses the PURGEX Z Purge Indicator to monitor the electrical equipment enclosure purge pressure 2 Step 1 WARNING Failure to heed the following information may lead to injury of personnel or equipment damage WARNING not open the electrical equipment enclosure a hazardous area even when de energized unless area has been properly tested and is known to not contain explosive materials WARNING Before initially starting the equipment electrical power wiring must be checked for correct size and routing NOTE Refer to all ATEX CSA IECEx NEC NFPA and UL certificates for any Special Conditions of Use If the sign X is placed after the certificate number it indicates that the equipment or protective sy

User`s Manual - R. Stahl, Inc.

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