American Power Conversion Automatic Transfer Switch User Manual
Contents
1. Conversion APC Web site www apc com The online User Guide contains additional information about the following topics related to the Automatic Transfer Switch Management interfaces User accounts Customizing setup Security Please recycle The shipping materials are recyclable Please save them for later use or dispose of them appropriately Receiving inspection Inspect the package and contents for shipping damage and make sure that all parts were sent Report any shipping damage immediately to the shipping agent and report missing contents damage or other problems immediately to APC or your APC reseller Automatic Transfer Switch Installation and Quick Start 1 Preliminary Information Product inventory Automatic Transfer Switch Rack mount brackets Front and rear rail segments 6000 6 Communication cable Automatic Transfer Switch Installation and Quick Start mph0080a Overview Front panel COT 713 Arc _ Q Input C Output 50000 ink Status www apc com vt ss e Network Man jement Card el preferenc a jork Man Configuration Automatic TS Transfer Switch mph0026a No Item Description Function Reset switch Restarts the Network Management Card Ethernet port Connects the Automatic Transfer Switch to your network using a network cable Link RX TX LED Indicates whether there is activity on2. Switch Installation and Quick Start 3 Installation Attach mounting brackets Attach the left and right mounting brackets to the unit using two flat head Phillips screws provided for each bracket Place the brackets flush with the front of the rack to leave room for routing cables Note mph0096a Disassemble the adjustable brackets The adjustable brackets are necessary only if you are using a four post enclosure or rack If you are using a two post rack the Automatic Transfer Switch is supported by the mounting brackets alone 1 Disassemble each adjustable bracket by removing the slide screw and nut mph0014a 2 Set the screws nuts and adjustable bracket segments aside Automatic Transfer Switch Installation and Quick Start Installation Attach rear segments to the rack 1 Insert caged nuts provided with your enclosure on the enclosure s rear vertical mounting rails at your chosen location 2 Align the rear segments of the adjustable bracket with the caged nuts you inserted in step 1 3 Insert and tighten mounting screws provided ooooool mph0013a Attach front segments to the switch 1 Align the front segments of the adjustable bracket with the four corresponding holes on the sides of the switch 2 Attach both front segments to the switch using two Phillips pan head screws provided for each bracket segment mph0095a Automatic
3. can use ARP and Ping to assign an IP address to a Automatic Transfer Switch and then use Telnet to access that Automatic Transfer Switch s control console and configure the needed TCP IP settings Q After the Automatic Transfer Switch has its IP address configured you can use Telnet without first using ARP and Ping to access that Automatic Transfer Switch Note Use ARP to define an IP address for the Automatic Transfer Switch and use the Automatic Transfer Switch s MAC address in the ARP command For example to define an IP address of 156 205 14 141 for a Automatic Transfer Switch that has a MAC address of 00 c0 b7 63 9f 67 use one of the following commands Windows command format arp s 156 205 14 141 00 c0 Db7 63 9f 67 LINUX command format arp s 156 205 14 141 00 c0 b7 63 9 67 Automatic Transfer Switch Installation and Quick Start 15 Recovering From A Lost Password 16 Use the following instructions to reset the Network Management Card password Note l 2 10 11 12 Select a serial port at the local computer and disable any service that uses that port Connect APC serial cable 990 1000A to the Automatic Transfer Switch serial port and to the serial port on the local computer Run a terminal program such as Windows HyperTerminal and configure the selected port for 19200 bps 8 data bits no parity 1 stop bit and no flow control and save the changes Press ENTER and log o
4. 19200 bps 8 data bits no parity 1 stop bit and no flow control and reconnect HyperTerminal Automatic Transfer Switch Installation and Quick Start Warranty Limited warranty APC warrants the Automatic Transfer Switch to be free from defects in materials and workmanship for a period of two years from the date of purchase Its obligation under this warranty is limited to repairing or replacing at its own sole option any such defective products This warranty does not apply to equipment that has been damaged by accident negligence or misapplication or has been altered or modified in any way This warranty applies only to the original purchaser Warranty limitations Except as provided herein APC makes no warranties express or implied including warranties of merchantability and fitness for a particular purpose Some jurisdictions do not permit limitation or exclusion of implied warranties therefore the aforesaid limitation s or exclusion s may not apply to the purchaser Except as provided above in no event will APC be liable for direct indirect special incidental or consequential damages arising out of the use of this product even if advised of the possibility of such damage Specifically APC is not liable for any costs such as lost profits or revenue loss of equipment loss of use of equipment loss of software loss of data costs of substitutes claims by third parties or otherwise This warranty gives you s
5. Automatic Transfer Switch uses the default gateway to test the network when ote traffic is very light See Watchdog Features in the Introduction of the Automatic Transfer Switch User s Guide for more information about the watchdog role of the default gateway TCP IP configuration methods Use one of the following methods to define the TCP IP settings needed by the Automatic Transfer Switch Device IP Configuration Wizard See Device IP Configuration Wizard on page 8 BOOTP or DHCP server See BOOTP amp DHCP configuration on page 8 Local computer See Local access to the control console on page 10 Networked computer See Remote access to the control console on page 15 Automatic Transfer Switch Installation and Quick Start 7 Quick Configuration Device IP Configuration Wizard You can use the Device IP Configuration Wizard on a Windows NT 4 0 Windows 2000 Windows 2003 or Windows XP computer to discover unconfigured Automatic Transfer Switches and configure their basic TCP IP settings LO 3 To configure one or more Automatic Transfer Switches by exporting configuration settings A froma configured Automatic Transfer Switch see How to Export Configuration See also Settings in the User s Guide on the Utility CD 1 Insert the APC Automatic Transfer Switch Utility CD into a computer on your network 2 Select the Device IP Configuration Wizard from the main menu 3 Wait for the Wiz
6. Configuration in the Automatic Transfer Switch User s Guide ai 1 An Automatic Transfer Switch sends out a DHCP request that uses the following to identify itself A Vendor Class Identifier APC by default A Client Identifier by default the Automatic Transfer Switch s MAC address value A User Class Identifier by default the identification of the Automatic Transfer Switch s application firmware Automatic Transfer Switch Installation and Quick Start 9 Quick Configuration 2 A properly configured DHCP server responds with a DHCP offer that includes all of the settings that the Automatic Transfer Switch needs for network communication The DHCP offer also includes the Vendor Specific Information option DHCP option 43 By default the Automatic Transfer Switch will ignore DHCP offers that do not encapsulate the APC cookie in the Vendor Specific Information option using the following hexidecimal format Option 43 01 04 31 41 50 43 where the first byte 01 is the code the second byte 04 is the length the remaining bytes 31 41 50 43 are the APC cookies jy See your DHCP server documentation to add code to the Vendor Specific Information option See also To disable the APC cookie requirement see Remote access to the control console on page 15 To change the control console s DHCP Cookie Is setting use the Advanced option in the TCP IP menu See Remote access to th
7. Installation and Quick Start 13 Configuring the ATS Configuring sensitivity The sensitivity setting controls how tolerant the ATS is of fluctuations in power before it switches to the secondary power source Configure the sensitivity range for your ATS using the Switch Configuration menu When sensitivity is set to low the ATS will wait 5 ms before switching to the alternate power source when there is a disturbance in the power supply When sensitivity is set to high the ATS will wait 3 ms before transferring power The default setting is high Configuring voltage transfer range 14 The voltage transfer range determines the acceptable RMS voltages for the ATS When voltage moves outside the specified range the ATS switches to the secondary power source Configure the voltage transfer range using the Switch Configuration menu The ATS can be set to narrow medium or wide voltage ranges depending on the power conditions of your system The default setting of the voltage range is Medium Note APC Part Number QN al Voltage Narrow Medium Wide AP7701 120 V 20 110 130 V 23 108 5 131 5 V 27 106 5 133 5 V AP7722 230 V 30 215 245 V 35 212 5 247 5 V 40 210 250 V AP7750 120 V 20 110 130 V 23 108 5 131 5 V 27 106 5 133 5 V Automatic Transfer Switch Installation and Quick Start Configuring the ATS Remote access to the control console From any computer on the same subnet as the Automatic Transfer Switch you
8. Q The DHCP amp BOOTP setting assumes that a properly configured DHCP or BOOTP server is available to provide TCP IP settings to Automatic Transfer Switches Note 1 Enter the Automatic Transfer Switch s MAC and IP addresses the subnet mask and default gateway settings and an optional Bootup file name in the BOOTPTAB file of the BOOTP server cy For the MAC address look on the bottom of the Automatic Transfer Switch or on the Quality Assurance slip included in the package See also 2 When the Automatic Transfer Switch reboots the BOOTP server provides it with the TCP IP settings If you specified a bootup file name the Automatic Transfer Switch attempts to transfer that file from the BOOTP server using TFTP or FTP The Automatic Transfer Switch assumes all settings specified in the bootup file To create the bootup file see your BOOTP server documentation See also If you did not specify a bootup file name the Automatic Transfer Switch can be configured remotely by using Telnet or by using the Web interface User Name and Password are both apc by default DHCP You can use a RFC2131 RFC2132 compliant DHCP server to configure the TCP IP settings for the Automatic Transfer Switch This section briefly summarizes the Automatic Transfer Switch communication with a DHCP server For more detail about how a DHCP server is used to configure the See also etwork settings for a Automatic Transfer Switch see DHCP
9. Transfer Switch Installation and Quick Start 5 Installation Mount the Automatic Transfer Switch in the enclosure Two people should perform this procedure Heavy 1 Position the Automatic Transfer Switch in front of the mounted rear adjustable bracket segments 2 Align the front and rear adjustable bracket segments and slide the front segments onto the rear segments 3 Align the mounting brackets on the switch with the enclosure s front vertical mounting rails and insert caged nuts provided in the appropriate holes on the front vertical mounting rails 4 Insert and tighten the mounting screws provided 5 Insert slide screws and nuts removed previously into each adjustable bracket and tighten them to secure the positions of the adjustable brackets mph0012a 6 Automatic Transfer Switch Installation and Quick Start Quick Configuration Disregard the procedures in this section if you have APC InfraStruXure A Manager as part of your system See the InfraStruXure Manager s Warning documentation for more information Overview You must configure the following TCP IP settings before the Automatic Transfer Switch can operate on a network P address of the Automatic Transfer Switch e Subnet mask Default gateway If a default gateway 1s unavailable use the IP address of a computer that is located Q on the same subnet as the Automatic Transfer Switch and that is usually running noe The
10. Web browser to configure the Automatic Transfer Switch options or to view the event log you can use either of the following The HTTP protocol enabled by default which provides authentication by user name and password but no encryption The more secure HTTPS protocol which provides extra security through Secure Sockets Layer SSL and encrypts user names passwords and data being transmitted It also provides authentication of Network Management Cards by means of digital certificates To access the Web interface and configure the security of your device on the network 1 Address the Network Management Card by its IP address or DNS name if configured 2 Enter the user name and password by default ape and ape for an Administrator or device and ape for a Device Manager 3 Select and configure the type of security you want This option is available only for Administrators LO 3 See the chapter entitled Security in the User s Guide for information on choosing SE and setting up your network security Use the Web SSL option of the Network menu See also tO enable or disable the HTTP or HTTPS protocols Automatic Transfer Switch Installation and Quick Start 11 How to Access the Automatic Transfer Switch Interfaces Telnet SSH You can access the control console through Telnet or Secure SHell SSH depending on which is enabled An Administrator can enable these access methods through the Telnet SSH option of the Ne
11. Xure RPC APC www apcec com APC Worldwide Customer Support Customer support for this or any other APC product is available at no charge in any of the following ways Visit the APC Web site to access documents in the APC Knowledge Base and to submit customer support requests www apc com Corporate Headquarters Connect to localized APC Web sites for specific countries each of which provides customer support information www apc com support Global support searching APC Knowledge Base and using e support Contact an APC Customer Support center by telephone or e mail Regional centers Direct InfraStruXure Customer Support Line 1 877 537 0607 toll free APC headquarters U S Canada 1 800 800 4272 toll free Latin America 1 401 789 5735 USA Europe Middle East Africa 353 91 702000 Ireland Japan 0 35434 2021 Australia New Zealand South Pacific area 61 2 9955 9366 Australia Local country specific centers go to www apc com support contact for contact information Contact the APC representative or other distributor from whom you purchased your APC product for information on how to obtain local customer support Entire contents copyright 2005 American Power Conversion Corporation All rights reserved Reproduction in whole or in part without permission is prohibited APC the APC logo PowerNet and InfraStruXure are trademarks of American Power Conversi
12. ard to discover the first unconfigured Automatic Transfer Switch then follow the on screen instructions If you leave the Start a Web browser when finished option enabled you can use apc for both the User Name and Password to access the Automatic Transfer Note Witch through your browser BOOTP amp DHCP configuration The Boot Mode Setting a TCP IP option in the Automatic Transfer Switch s Network menu identifies how the TCP IP settings will be defined The possible settings are Manual DHCP only BOOTP only and DHCP amp BOOTP the default setting The DHCP amp BOOTP setting assumes that a properly configured DHCP or BOOTP server is available to provide TCP IP settings to Automatic Transfer Switches If these servers are unavailable see Device IP Configuration Wizard on this page Local access to the control console on page 10 Remote access to the control console on page 15 With Boot Mode set to DHCP amp BOOTP the Automatic Transfer Switch attempts to discover a properly configured server It first searches for a BOOTP server then a DHCP server and repeats this pattern until it discovers a BOOTP or DHCP server For more information see BOOTP on page 9 or DHCP on page 9 Note 8 Automatic Transfer Switch Installation and Quick Start Quick Configuration BOOTP You can use an RFC951 compliant BOOTP server to configure the TCP IP settings for the Automatic Transfer Switch
13. e control console on page 15 Local access to the control console l 2 10 Select a serial port at the local computer and disable any service that uses that port Connect APC serial cable 990 1000A to the Automatic Transfer Switch serial port and to the serial port on the local computer Run a terminal program such as Windows HyperTerminal and configure the selected port for 19200 bps 8 data bits no parity 1 stop bit and no flow control and save the changes Press ENTER and log on as the Automatic Transfer Switch administrator Select option 11 Web config from the main menu and then disconnect the terminal program Reconfigure the selected port for 2400 bps 8 data bits no parity 1 stop bit and no flow control and reconnect HyperTerminal Press ENTER to display the User Name prompt Automatic Transfer Switch Installation and Quick Start How to Access the Automatic Transfer Switch Interfaces Overview After the Automatic Transfer Switch is running on your network you can use the interfaces summarized here to access the unit I i Ss For more information on the interfaces see the User s Guide See also Web interface As your browser you can use Microsoft Internet Explorer 5 0 and higher or Netscape 6 x to access the Network Management Card through its Web interface Other commonly available browsers also may work but have not been fully tested by APC To use the
14. ffectiveness In direct patient care APC will not knowingly sell its products for use in such applications unless it receives in writing assurances satisfactory to APC that a the risks of injury or damage have been minimized b the customer assumes all such risks and c the liability of American Power Conversion is adequately protected under the circumstances Examples of life support devices The term ife support device includes but is not limited to neonatal oxygen analyzers nerve stimulators whether used for anesthesia pain relief or other purposes autotransfusion devices blood pumps defibrillators arrhythmia detectors and alarms pacemakers hemodialysis systems peritoneal dialysis systems neonatal ventilator incubators ventilators for adults and infants anesthesia ventilators infusion pumps and any other devices designated as critical by the U S FDA Hospital grade wiring devices and leakage current protection may be ordered as options on many APC UPS systems APC does not claim that units with these modifications are certified or listed as hospital grade by APC or any other organization Therefore these units do not meet the requirements for use in direct patient care Automatic Transfer Switch Installation and Quick Start 19 Radio Frequency Interference Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user s Warning authority t
15. he rack sens 5 Attach front segments to the switch ln 5 Mount the Automatic Transfer Switch in the enclosure 6 Quick Configuration 01v Lp ate vetSteeesereareeseet 7 Overview v meu ate it elie ev ane wd wo Ru LR Ye TE ee 7 TCP IP configuration methods leen 7 Device IP Configuration Wizard 8 BOOTP amp DHCP configuration lsnn 8 Local access to the control console 10 How to Access the Automatic Transfer Switch Interfaces 11 OVervie Ww oss Se ese ee cop v ides meee tao x Tein ente couse pe ge ans e Se en ace 11 Web interface io Sirenia a a e ee 11 Telnet SSH 0 2 0 2c 12 SNMP ses eon seater gate ee ie tea en eed tea sas 12 FIP SCP ccir aeee u pa Ro Rr ee eh ra Ex s 13 Configuring the Al S65 24564408 ces ewer ns E REF EY RES EEETS 14 Configuring sensitivity lernen 14 Configuring voltage transfer range 14 Remote access to the control console 15 Recovering From A Lost Password u 16 Warranty zai Ease nus can eerta cats uiam aues 17 Life Support Policy 0054 e cae ane oe Ochs se Saxe Sere bs 19 Automatic Transfer Switch Installation and Quick Start Preliminary Information Additional documentation This nstallation and Quick Start Manual and the online User 5 Guide are available on the supplied CD or on the American Power
16. n as the Automatic Transfer Switch administrator Select option 11 Web config from the main menu and then disconnect the terminal program Reconfigure the selected port for 2400 bps 8 data bits no parity 1 stop bit and no flow control and reconnect HyperTerminal Press ENTER to display the User Name prompt Press the RESET button on the Network Management Card which causes the Network Management Card to restart a process that typically takes approximately 15 seconds Press ENTER as many times as necessary to re display the User Name prompt then use ape for the user name and password If you take longer than 30 seconds to log on after the User Name prompt is redisplayed you must start the login procedure again at step 5 From the Control Console menu select System then User Manager Select Administrator and change the User Name and Password settings both of which was originally defined as apc Press CTRL C and log off You must perform the entire procedure log on change the user name and password and log off within two minutes so that you are not logged off for inactivity If you are logged off automatically the new settings will not take effect and you must repeat the entire procedure from the beginning Press and hold down the Preference button on the Automatic Transfer Switch which causes the Automatic Transfer Switch to reset typically in 10 to 15 seconds Reconfigure the selected port for
17. o operate this equipment USA FCC This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with this user manual may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference The user will bear sole responsibility for correcting such interference Canada ICES This Class A digital apparatus complies with Canadian ICES 003 Cet appareil num rique de la classe A est conforme a la norme NMB 003 du Canada Japan VCCI This is a Class A product based on the standard of the Voluntary Control Council for Interference by Information Technology Equipment VCCI If this equipment is used in a domestic environment radio disturbance may occur in which case the user may be required to take corrective actions COMMIT PAAR eS IE A UA eS VCC DIRIGO TFA A Te CT CORRE ARERR CHAT 50 GRRE S SHOT bU X3 COBBICIL HAA AD XR dE ETO k ICER NATL ET 20 Automatic Transfer Switch Installation and Quick Start InfraStru
18. on Corporation All other trademarks product names and corporate names are the property of their respective owners and are used for informational purposes only ene TAA mens
19. pecific legal rights and you may also have other rights which vary according to jurisdiction Obtaining service To obtain support for problems with your Automatic Transfer Switch 1 Note the serial number on the bottom of the Automatic Transfer Switch 2 Contact Customer Support at a phone number on the back cover of this document A technician will try to help you solve the problem by phone 3 If you must return the product the technician will give you a Return Material Authorization RMA number If the warranty expired you will be charged for repair or replacement Automatic Transfer Switch Installation and Quick Start 17 Warranty 18 Pack the unit carefully The warranty does not cover damage sustained in transit Enclose a letter with your name address RMA number and daytime phone number a copy of the sales receipt and a check as payment if applicable Mark the RMA number clearly on the outside of the shipping carton Ship by insured prepaid carrier to the address provided by the Customer Support technician Automatic Transfer Switch Installation and Quick Start Life Support Policy General policy American Power Conversion APC does not recommend the use of any of its products in the following situations In life support applications where failure or malfunction of the APC product can be reasonably expected to cause failure of the life support device or to affect significantly its safety or e
20. the network Status LED Indicates whether power is applied to the Network Management Card Q Preference button Sets the preferred source to supply power to the load equipment In normal operation if both sources are available the Automatic Transfer Switch will use the preferred source Press the Preference button to change the preferred source Preference A and B Indicates which of the two sources if any is selected as the LEDs preferred source If both LEDs are off neither source is preferred If a source is asynchronous the source s LED will flash once per second Source A and B LEDs Provides information about the input voltage from each source If the RMS input voltage and the measured frequency are within the selected tolerance range the corresponding indicator will light In a normal operating condition full source redundancy both LEDs are illuminated Q Connector LEDs Indicates which source is being used for the output only one arrow will be lit at any time The combination of Source LEDs Connector LEDs and Output LED provide a graphical view of the power flow through the Automatic Transfer Switch Output LED Shows that voltage is available at the output for the Automatic Transfer Switch Configuration port The local connection for accessing all the setup status maintenance and diagnostic information for the Automatic Transfer Switch Automatic Transfer
21. twork menu By default Telnet is enabled Enabling SSH automatically disables Telnet Telnet for basic access Telnet provides the basic security of authentication by user name and password but not the high security benefits of encryption To use Telnet to access an Automatic Transfer Switch s control console from any computer on the same subnet 1 At a command prompt use the following command line and press ENTER telnet address As address use the Network Management Card s IP address or DNS name if configured 2 Enter the user name and password by default ape and ape for an Administrator or device and ape for a Device Manager SSH for high security access If you use the high security of SSL for the Web interface use Secure SHell SSH for access to the control console SSH encrypts user names passwords and transmitted data The interface user accounts and user access rights are the same whether you access the control console through SSH or Telnet but to use SSH you must first configure SSH and have an SSH client program installed on your computer See the User Guide for more information on configuring and using SSH See also SNMP 12 After you add the PowerNet MIB to a standard SNMP MIB browser you can use that browser for SNMP access to the Automatic Transfer Switch The default read community name is public the default read write community name is private SNMP Allowing SNMP access to the A
22. utomatic Transfer Switch compromises the high If you enable SSL and SSH for their high security authentication and encryption disable security you implement by choosing SSL and SSH To disable SNMP you must be an Note Administrator use the SNMP option of the Network menu Automatic Transfer Switch Installation and Quick Start How to Access the Automatic Transfer Switch Interfaces FTP SCP You can use FTP enabled by default or Secure CoPy SCP to transfer new firmware to the Automatic Transfer Switch or to access a copy of the Automatic Transfer Switch s event logs SCP provides the higher security of encrypted data transmission and is enabled automatically when you enable SSH If you enable SSL and SSH for their high security authentication and encryption disable Q FTP Allowing file transfer to the Automatic Transfer Switch through FTP compromises n the high security you implement by choosing SSL and SSH To disable FTP you must be an Administrator use the FTP Server option of the Network menu To access the Automatic Transfer Switch through FTP or SCP the default user name and password are apc and apc for an Administrator or device and apc for a Device Manager In the command line use the IP address of the unit p 13 See the User Guide to use FTP or SCP to transfer firmware files to the Network Management Card or to retrieve log files from the Network Management Card See also Automatic Transfer Switch
23. www apec com Installation and Quick Start Automatic Transfer Switch Fi l Y R This manual is available in English on the enclosed CD Dieses Handbuch ist in Deutsch auf der beiliegenden CD ROM verf gbar Este manual est disponible en espa ol en el CD ROM adjunto Ce manuel est disponible en fran ais sur le CD ROM ci inclus Questo manuale disponibile in italiano nel CD ROM allegato A aw0 AS aa hs TEJA Al D CD ROM 7 b Z E c 723v ET Instrukcja Obstugi w jezyku polskim jest dostepna na CD O manual em Portugu s est dispon vel no CD ROM em anexo lauuoe PYKOBOACTBO Ha DyCCKOM A3bIKe UMEeTCH Ha NPUNaraeMOM KOMNAKT ANCKe Bu kullan m k lavuzunun T rk e si ili ikte g nderilen CD i erisinde mevcuttur EAT DA GR CD ERER PUA X BUR Contents Preliminary Information 0000 eee ee eee eee eee 1 Additional documentation eee 1 Please recycle iia 22 d asia te a ee eee eer ees eae 2 1 Receiving inspection 0000 ee eee eee eee 1 Product inventory eee es 2 OVEIVICW recer war Gn se meee bee hes Me ceases 3 Front panell 2226 fastens eot iore tu ees ee nU ie eee Be 3 Installation ari OSG es penera EP Ate MEER QUEE E PANAMA 4 Attach mounting brackets 0000 e eee eee eee 4 Disassemble the adjustable brackets 4 Attach rear segments to t
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