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APC ACRA100 hardware cooling accessory

1. 44 Quick Configuration ooo nacer ra EL ORDER ANSE 44 OVEN VIC W ii ss Soe A hel gens ies 44 TCP IP configuration methods 44 APC Device IP Configuration Wizard 45 AA en 45 BOOTP and DHCP configuration 45 Remote access to the command line interface 46 Command line interface 47 How to Recover from a Lost Password 48 OAdiSplay na Ns 49 E RE O A a ae 49 Display Operation aiii ns tee TRR R de Ta 50 Maintenance BT Le ak Detector aii ar eds ice aS les Sa TR R N N dt R ae 51 Calibration iii E Mani di aida dite Sas 51 Monthly Preventive Maintenance 52 Environment us tu Pa eee hee at dee Stas va 52 Clea lineSs 2535 ass cede scicace ete a idea 52 Mechanical rasta ls tante 53 Electrical ade cae ei arms is dir 53 Quarterly Preventive Maintenance 54 Mechanical ozen RN cts Gaia ain ann N NNN E 54 Functional tests ici i 54 Semi Annual Preventive Maintenance 54 Cle AMINE SS anos eee ates ec He eh owl gd asad ape 54 Troubleshooting unir sa OO Pumped Refrigerant System Operation and Maintenance iii General Information Overview The pumped refrigerant system is composed of at least one 160 kW Refrigeration Distribution Units RDUs circulating R 134a refrigerant to the Co
2. 28 CM component run hours 28 Reset CM run hours 28 Thresholds isana eni A a en ae Ae ee Yona 28 Service intervals 29 Display SeuingS eiii yee oe oe Tere weeks Password and timeout 30 Dateand timean iise ia at id a rd dea este 30 Identify the RDU by Name and Location 30 Adjust display 0 S 21 eo a K 31 Dis play UnitSs iici iio Si Sk Sie tte td 31 Network Configuration Configure the network 32 View Status Readings Scrolling status screens 33 STATUS EE Mote Sot a heer Oeste T eatin eee 33 Cooling group status 36 About the RDU corron aeaa i Ha Rae hae a ee ares 36 Event LOS Manon aan cee a ee ad eae Aca ER eS nee View event 09 nieee ee a menant 37 Glearevent logis ete kei a A a cee 37 Respond to AlarmS sss s s Aa me de View active alarms 37 Clear active alarms 37 Alarm messages and suggested actions 38 CM alarm messages 41 Pumped Refrigerant System Operation and Maintenance Network Management Card
3. Start a CM Remotely Path Main gt Cooling Modules gt Select CM gt Operate To start the CM select On Note The CMs Local On Off setting must be set to On for the CM to operate Additionally the CM will not operate until the RDU has started the pump Stop a CM Remotely Path Main gt Cooling Modules gt Select CM gt Operate To stop the CM select Standby 18 Pumped Refrigerant System Operation and Maintenance General Configuration The configuration options are set during the commissioning of the RDU s and cooling modules CMs in the group CAUTION HAZARD TO EQUIPMENT OR PERSONNEL All work must be performed by American Power Conversion APC by Schnieder Electric authorized personnel Failure to follow these instructions can result in death serious injury or equipment damage Q Note The Admin Password is required before configuration changes can be entered RDU configuration Path Main gt RDU gt Configuration RDU ID Enter an identifier number for the RDU Start up Dly Enter a value for the delay The start up delay begins when the unit is started and initialized The RDU cannot begin operation until this delay expires Use the start up delay to restart equipment sequentially after a scheduled downtime or a power outage Pump Changeover The accumulated runtime before the pump is switched over to the lag pump Enter a value for the Pump Rotation Time in Days If set to zero th
4. If the problem persists contact Technical Support 20 Fan 4 Fault RA Only Warning Make sure all intakes are clear of blockage e Make sure the fan housing is full installed in the locked position If the problem persists contact Technical Support 21 Fan 5 Fault RA Only Warning Make sure all intakes are clear of blockage e Make sure the fan housing is full installed in the locked position If the problem persists contact Technical Support 27 Fan Type Not Configured Critical Contact Technical Support 13 Group Communication Warning Confirm that the A Link cables are connected properly to the A Fault Link ports e Confirm that the A Link network has terminators on the first and the last units in the chain e Verify the number of cooling units in the group is correct e If the problem persists contact Technical Support 8 Liquid Inlet Pressure Critical Make sure the refrigerant supply pressure sensor is connected Sensor Fault properly If the problem persists contact Technical Support 5 Liquid Temperature Critical Make sure the sensor is connected properly Sensor Fault If the problem persists contact Technical Support 15 Primary Power Source Warning Make sure the power source is connected properly and is within Failure specifications Pumped Refrigerant System Operation and Maintenance 41 Alarm Number Alarm Message Severity Action Required 31
5. e Confirm that power if required is being supplied to the external equipment e If the RDU is providing power to the external equipment verify that the external equipment is lt 50 mA e Test the external equipment by bypassing the customer output contact properly Equipment does not shut Drive voltage down on command e Verify that there is a drive voltage entering the input of the RDU You may use the 12 V or 24 V You must also use the ground No communication with Improper building management connection system BMS port e Confirm that the RDU is connected to the BMS port and not to the Control port e Make sure that the wire polarity is correct Using a DC voltmeter test the signal with no transmissions in progress Expect the voltage at pin 2 to be greater than at pin 1 by at least 200 mV Measure the RDU with the cable disconnected and then measure it again with the cable connected If the signal is less than 200 mV the RDU may be reverse wired e Make sure every CM has either two sets of wires on the connector or one set of wires and a terminating resistor of 100 to 120 ohms Cooling modules are not A Link failure communicating with the RDU e Verify that the first and last cooling modules have one cable and a terminator e Verify that every other cooling module has two cables e Confirm that the A Link cables are connected to the A Link ports and that a network cable is connected to the network
6. Fault Warning e Contact Technical Support Pump 2 High Head Pressure Warning e Contact Technical Support Pumps Vapor Locked Warning e Contact Technical Support Pump Outlet Temperature Warning Sensor Fault e Make sure the temperature sensor is connected properly If the problem persists contact Technical Support RDU Communication Fault Critical e Contact Technical Support Receiver Pumped Dry Warning e Verify that there is adequate refrigerant in the system Add refrigerant if necessary e If the problem persists contact Technical Support Refrigerant Loss Detected Critical e A refrigerant leak has been detected e Identify the source of the leak e Have the leak repaired and the refrigerant replaced e For assistance contact Technical Support Refrigerant Loss Detection Warning Disabled e At least one of the following conditions has occurred Refrigerant was added to the system One or more CMs have been added or removed from the system One or more CMs have been placed into Standby Stop or Maint mode e If the change is permanent the refrigerant leak detector must be recalibrated e For assistance contact Technical Support Starting Conditions Not Warning e Ensure the chilled water temperature is within specifications Satisfied If the problem persists contact Technical Support System Stop Critical e Check for other alarms Water Leak Detecte
7. Interval Expired RA e Reset the alarm only 29 Evaporative Temperature Critical Contact Technical Support Below Dewpoint 22 Fan 1 Door Open OA Critical Make sure the door is closed only e Make sure the door interlock switch is connected properly 17 Fan 1 Fault Warning Make sure the fan door is fully closed e Make sure all intakes are clear of blockage e Make sure the fan housing is full installed in the locked position If the problem persists contact Technical Support 24 Fan 1 Missing or Wrong Critical Make sure the fan housing is fully installed and in the locked Type OA only position e Make sure the fan is set to the correct voltage If the problem persists contact Technical Support 23 Fan 2 Door Open OA Critical Make sure the door is closed only e Make sure the door interlock switch is connected properly 18 Fan 2 Fault Warning Make sure the fan door is fully closed e Make sure all intakes are clear of blockage e Make sure the fan housing is full installed in the locked position If the problem persists contact Technical Support 25 Fan 2 Missing or Wrong Critical Make sure the fan housing is fully installed and in the locked Type OA only position e Make sure the fan is set to the correct voltage If the problem persists contact Technical Support 19 Fan 3 Fault RA Only Warning Make sure all intakes are clear of blockage e Make sure the fan housing is full installed in the locked position
8. Note Look for the MAC address on the back of the Network Management Card or on the Quality Assurance slip included in the package with the replacement Network Management Card For example to define 156 205 14 141 as the IP address of a RDU with 00 c0 b7 63 9f 67 as its MAC address use one of the following commands Windows command format arp s 156 205 14 141 00 c0 b7 63 9f 67 LINUX command format arp s 156 205 14 141 00 c0 b7 63 9f 67 2 Use Ping with a size of 113 bytes to assign the IP address defined by the ARP command For the IP address defined in step 1 use one of the following commands Windows command format ping 156 205 14 141 1 113 LINUX command format ping 156 205 14 141 s 113 3 Use Telnet to access the RDU at its newly assigned IP address For example telnet 156 205 14 141 4 Use ape for both user name and password See Command line interface on page 1 to finish the configuration Command line interface After you log on at the command line interface as described in Local access to the command line interface on page 1 or Remote access to the command line interface on page 1 you can manually configure network settings 1 Contact your network administrator to obtain the IP address subnet mask and default gateway for the RDU 2 Use these three commands to configure network settings Text in italics indicates a variable a tcpip i yourlPaddress b tcpip s you
9. connected correctly and a terminator is wired into the RDU between Modbus DO and Modbus D1 The temperature sensors located on the equipment are connected correctly The rack temperature sensors are installed correctly The network port is connected correctly and an IP address has been assigned to the RDU s Hoodoo oa 0 The optional rope water detection device is installed properly Pumped Refrigerant System Operation and Maintenance Start up Inspection Checklist The start up inspection ensures that the equipment is operating properly after the initial start up This inspection verifies that all modes of operation are working correctly and that the equipment is ready for normal operation See Start the RDU on page 1 for startup information While the equipment is operating ensure that Ly The unit is free from malfunctions including chilled water leaks or other irregularities in each mode of operation LJ Both the primary and secondary power inputs can supply power to all functions in the equipment Ly A pump is operating Ly Air filters in CMs RA only are clean and free of debris Replace air filters with APC air filters only Final Inspection Checklist The final inspection verifies that the system is clean the installed options work properly and the start up form is sent to APC Ensure that Ly The system is clean and free from debris LJ Packaging materials are disposed o
10. port e Verify that the number of cooling modules in the cooling group matches the group number setting Equipment does not shut Drive voltage down on command e Verify that there is a drive voltage entering the input of the cooling unit You may use the available 12 V or 24 V You must also use the ground No communication with Improper e Confirm that the RDU is connected to the BMS port and not to the Control port e Make sure that the wire polarity is correct Using a DC voltmeter test the signal with no transmissions in progress Expect the voltage at pin 2 to be greater than at pin 1 by at least 200 mV Measure the RDU with the cable disconnected and then measure it again with the cable connected If the signal is less than 200 mV the RDU may be reverse wired e Make sure that every CM has either two sets of wires on the connector or one set of wires and a terminating resistor of 100 to 120 ohms building management connection system BMS port CMs are not e A Link failure communicating with each other e Verify that the first and last CMs have one cable and a terminator e Verify that every other cooling module has two cables e Confirm that the A Link cables are connected to the A Link ports and that a network cable is connected to the network port e Verify that the number of CMs in the cooling group matches the group number setting Output air is 17 C 62 F and CM fans are running at a ver
11. that the difference is positive and the power output of the CMs is less than 4 kW Pumped Refrigerant System Operation and Maintenance 21 Identify the cooling modules 22 Path Main gt CMs In Network gt Unconfigured CMs To add an unconfigured CM to the group Physically note on paper the temporary ID number as it appears on the display of the CM once power is applied Bring the note with the number back to the RDU and proceed to configure the CM using the temporary ID number to identify the CM from the list that appears on the RDU display interface Note Be careful to add only CMs that are physically piped to the RDU Do not add CMs that Q are piped to other RDUs Note Name the CM according to the three digit protocol e First digit is the RDU Second digit is the Group Third digit is the CM If there are unassigned CMs the screen will show a list of the CMs by identification number To assign a CM to the group select the CM You must enter the Admin Password to continue to the next screen RDU ID The unique identification number of the RDU Range 1 through 4 This value is used to identify the RDU from which CMs will receive refrigerant from the RDU Group Use the up and down arrow buttons to scroll to the group number you want Range 1 through 15 This value is used to identify which CMs are to operate as a group CM Use the up and down arrow buttons to scroll to the number you want to associate to
12. the CM you are adding Range 1 through 15 The value selected uniquely identifies a CM within a set of CMs having the same RDU ID and Group parameters Assign CM Selecting Assign CM opens the next screen Select Yes to add the CM to the group Pool Empty If this screen appears when you select Unconfigured CM there are no unassigned CMs Pumped Refrigerant System Operation and Maintenance Group Configuration Group settings determine which modules are available in each group and how the groups should operate CAUTION HAZARD TO EQUIPMENT OR PERSONNEL All work must be performed by American Power Conversion APC by Schnieder Electric authorized personnel Failure to follow these instructions can result in death serious injury or equipment damage Modify a Cooling Module CM ID Path Main gt Cooling Modules gt Select CM gt Configuration gt Modify CM ID RDU ID The unique identification number of the RDU Group Select a new Group number CM Select a new CM number Assign CM Select to apply the changes to the selected CM Once selected the confirmation screen comes up Select Yes or No View the groups Path Main gt Groups Select Group Select the group you want to view CM List From the group number you selected you can view the CMs by ID number Number of Units Select the number of CMs you expect to be in the group The Group Communications Loss alarm is initiated if the CM
13. the cooling unit e SM Enter the subnet mask for the Network Management Card of the cooling unit s GW Enter the default gateway for the Network Management Card of the cooling unit Boot Mode Set the method by which the Network Management Card of the RDU will acquire its network settings Manual Enter the IP Address subnet mask and default gateway using the IP Address menu e BOOTP Set the Network Management Card of the unit to obtain its network settings from a BOOTP server DHCP Set the Network Management Card of the unit to obtain its network settings from a DHCP server By default DHCP requires an APC cookie before it will accept an IP address See DHCP on page 1 for more information BOOTPDHCP Set the Network Management Card of the unit to search for its network settings from either a BOOTP or a DHCP server Pumped Refrigerant System Operation and Maintenance View Status Readings The display interface has several options for viewing the status of the RDU the CMs in the cooling group either individually or as a group and the environment being controlled The status readings for the cooling unit are available under the View Unit Status option in the main menu and status readings for the cooling group are available under the View Group Status option on the main menu or on the scrolling status screens Scrolling status screens When the display interface is idle it scrolls through screens of status informat
14. the problem persists contact Technical Support 38 Upper Supply Critical Make sure the sensor is connected properly Temperature 4 Fault e If the problem persists contact Technical Support 42 Pumped Refrigerant System Operation and Maintenance Alarm Number Alarm Message Severity Action Required 39 Lower Supply Critical Make sure the sensor is connected properly Temperature 1 Fault If the problem persists contact Technical Support 40 Lower Supply Critical Make sure the sensor is connected properly Temperature 2 Fault If the problem persists contact Technical Support 41 Lower Supply Critical Make sure the sensor is connected properly Temperature 3 Fault If the problem persists contact Technical Support 42 Lower Supply Critical Make sure the sensor is connected properly Temperature 4 Fault If the problem persists contact Technical Support 14 Unit ID Needs Critical Configure the unit through the display interface Configuration 26 Unit Personality Not Critical Contact Technical Support Configured 9 Vapor Outlet Pressure Critical Make sure the refrigerant HXGR pressure sensor is connected Sensor Failure properly e If the problem persists contact Technical Support 6 Vapor Temperature Warning Make sure the sensor is connected properly Sensor Fault e If the problem persists contact Technical Support Pumped Refrigerant System Operation and Maintenance 43 Network M
15. ADC by Schneider Electric Operation and S Maintenance De Pumped Refrigerant System Refrigeration Distribution Unit RDU lt and Cooling Modules ACDA901 ACOA500 ACOA501 ACRA100 ACRA101 a b lt R 0 This manual is available in English on the enclosed CD Dieses Handbuch ist in Deutsch auf der beiliegenden CD ROM verf gbar Deze handleiding staat in het Nederlands op de bijgevoegde cd Este manual esta disponible en espa ol en el CD ROM adjunto Ce manuel est disponible en frangais sur le CD ROM ci inclus Questo manuale disponibile in italiano nel CD ROM allegato AYZ 2 7 VO BARBI D CD ROM D CRISES Instrukcja Obstugi w jezyku polskim jest dostepna na CD O manual em Portugu s esta disponivel no CD ROM em anexo HaHHoe PyKOBOACTBO Ha pycckom A3bIKe UMeeTCA Ha MpunaraemoM KOMNAKT AUCKE MEATY CD _E RAR ASE UP SCHR AS o se CD HA Sa WFO USLC American Power Conversion Legal Disclaimer The information presented in this manual is not warranted by the American Power Conversion Corporation to be authoritative error free or complete This publication is not meant to be a substitute for a detailed operational and site specific development plan Therefore American Power Conversion Corporation assumes no liability for damages violations of codes improper installation system failures or any other problems that cou
16. Corporation or its licensors All rights in the content not expressly granted herein are reserved No rights of any kind are licensed or assigned or shall otherwise pass to persons accessing this information This Publication shall not be for resale in whole or in part Contents General Information c ccccecececcccececcscsceccecscenencsceaeaee A Overview sta fares ee sd a OSG di ea ee ON 1 Save these instructions 1 Inspection CheckliSts ove view A hehe eae 3 Initial Inspection Checklist 3 Electrical Inspection Checklist 4 Mechanical Inspection Checklist 5 User Interface Inspection Checklist 6 Start up Inspection Checklist 7 Final Inspection Checklist 7 Operan The Pumped Refrigerant System 8 System Operation 8 Refrigerant Circulation 8 System Architecture 9 Pumped Refrigerant System Piping Diagram 11 OA Piping Diagram eaa oeae ne a aa laine ae alae ese a ed anne 12 RA Piping Diagram 13 Display Interface 223 000 nase a Te Ra RRR TE KRSR aR 14 Using the Display cia eat est So ae ei Te 15 Scrolling status scre
17. Failure to follow these instructions can result in equipment damage Gain P The proportional multiplier gain for this mode or actuator The proportional multiplier adjusts for the difference error between the measured value and the setpoint Rate I The integral multiplier reset rate for this mode or actuator The integral multiplier adjusts for error measurement and the amount of time that the error has existed The integral multiplier adds to or subtracts from the output in small increments to correct for the offset error caused by the proportional contribution Deriv D The derivative multiplier derivative for this mode or actuator The derivative multiplier adjusts the output for rapid changes in the error correcting for the rate of change of the error Pumped Refrigerant System Operation and Maintenance Tune the PID loop Tune the PID loop to optimize the performance of the cooling group NOTICE HAZARD TO EQUIPMENT This procedure is to be performed by APC authorized personnel only The PID loop must be tuned after the equipment in the room is installed and running Failure to follow these instructions can result in equipment damage Note The PID loop should be tuned periodically to account for changes in the room load Adjust the integral and derivative constants to zero and the proportional constant to 1 0 Set the temperature setpoint value and start the cooling group Der When the
18. On Press the Enter key once more to turn the lights Off The lights on that OA will remain off until the value is set to On Warning LED A Yellow LED will illuminate when Warning level alarms are initiated Critical LED A Red LED will illuminate when Critical level alarms are initiated screen as facing the display will elapse before the display will revert to scrolling through the Note 60 seconds following access of the features located from the left side of the display Q features located to the right of the display screen Unit ID The Unit ID is the identifier given to the CM after it is installed in the system The RDU uses the unique number to identify and control the CM Supply Air Temp The supply air temperature sensor reading Centigrade or Fahrenheit display is selected at the RDU Rack Inlet Air Temp Rack inlet air temperature sensor reading Centigrade or Fahrenheit display is selected at the RDU Alarm Code The Alarm Code number corresponds to the alarm codes listed in CM alarm messages on page 1 Refer to the list to identify the alarm 50 Pumped Refrigerant System Operation and Maintenance Maintenance Leak Detector Calibration The leak detection feature must be calibrated before it can be used Note In order for calibration to successfully complete the RDU and CMS must be on with a Q minimum system load of 5 kW Path Main gt RDU gt Status gt Measurements From the display interface o
19. Positions The positions of the EEV and EPRV as expressed in a percentage of a full open condition EEV Pos The current position of the Electronic Expansion Valve EPRV Pos The current position of the Electronic Pressure Regulator Valve Pumped Refrigerant System Operation and Maintenance 35 Cooling group status Path Main gt View Group Status View information about the group Max Rack The highest rack temperature reported by any sensor Min Rack The lowest rack temperature reported by any sensor Air Flow The combined airflow output of the modules in the group Cool Output The combined output of the group Cool Demand The cooling output required to meet the current heat load of the conditioned space Cool Setpt The temperature you set to maintain the room environment About the RDU 36 Path Main gt RDU gt About View identifying information that is helpful when obtaining service e RDU ID Identifier of the RDU e S N Serial number e F W Controller firmware revision s H W Hardware revision e RDU APP Application firmware version AOS Ver APC OS firmware version Pumped Refrigerant System Operation and Maintenance Event Log The event log saves status information and a message each time a change in the group is detected Alarms and events are recorded in the log and displayed on the active alarms screen Status events informational and system configuration changes are only displayed in the
20. Primary Power Source Critical The input voltage is higher than the unit s rated value Connect the Overvoltage unit to a properly rated voltage input 16 Secondary Power Source Warning Make sure the power source is connected properly and is within Failure specifications 32 Secondary Power Source Critical e The input voltage is higher than the unit s rated value Connect the Overvoltage unit to a properly rated voltage input 7 Rack Temperature Critical Make sure the sensor is connected properly Sensor Fault e If the problem persists contact Technical Support 10 Rack Temperature High Critical Make sure the temperature sensor is connected properly Violation e Make sure the Rack Inlet High Temperature threshold is set correctly in the Thresholds screen e If the problem persists contact Technical Support 30 RDU Communications Critical Confirm that the A Link network has terminators on the first and Fault the last units in the chain e Confirm that the A Link cables are connected properly to the A Link ports If the problem persists contact Technical Support 11 Return Air High Warning Make sure the sensor is connected properly Temperature Violation e Make sure the Return Air High Temperature threshold is set correctly in the Thresholds screen If the problem persists contact Technical Support 0 Return Air Temperature Critical Make sure the sensor is connected properly Sensor Fault e If the problem persists contact Tec
21. Select menu items and access information O ESC key Return to previous screen or cancel current operation Enter key Open menu items and input changes to cooling group level and cooling unit level settings O Help key Display context sensitive help Press the help key for information about each option on the screen and for instructions on performing tasks 14 Pumped Refrigerant System Operation and Maintenance Using the Display Every time you apply power to the cooling unit the display interface initializes causing the LEDs to cycle and the alarm tone to activate Scrolling status screens After start up the interface displays the firmware revision number of the display interface The display interface then scrolls automatically and continuously through screens of status information Status Screen Name Status Information Displayed System Status e Alarms Present e IP xxx XXX XXX XXX e Date Time RDU On Standby RDU ID Unit identifier s Name e Loc RDU location CM ID e CM ID Cool Out 15 kW e Cool Setpt Setpoint 22 C or 71 9 F e Rack Inlet 23 C or 73 7 F Press the up or down arrow key to interrupt the automatic scrolling and view a specific status screen To return to the scrolling status screens press ESC from one of the main menu screens Main menu screens On any top level status screen press the ENTER or ESC key to open the first main menu screen Note Once a period of inacti
22. aintenance APC Device IP Configuration Wizard You can use the APC Device IP Configuration Wizard at a computer running Microsoft Windows 2000 Windows Server 2003 or Windows XP to discover unconfigured RDUs and configure their basic TCP IP settings one card at a time over the network Note Most software firewalls must be temporarily disabled for the Wizard to discover O unconfigured RDUs 1 Ifautorun is enabled the user interface of the CD starts when you insert the Utility CD into a computer on your network Otherwise open the file contents htm on the CD 2 Select the Device IP Configuration Wizard from the main menu 3 When the Wizard discovers the unconfigured RDU follow the on screen instructions the RDU through your browser by using ape the default for both the user name and Note If you leave the option Start a Web browser when finished enabled you can access Q password ini file utility You can use the ini file export utility to export ini file settings from configured RDUS to one or more unconfigured RDUs The utility and documentation are included on the Utility CD BOOTP and DHCP configuration The default TCP IP configuration setting BOOTP amp DHCP assumes that a properly configured BOOTP or DHCP server is available to provide TCP IP settings to RDUs The RDU first attempts to discover a properly configured BOOTP server and then a DHCP server It repeats this pattern until it discovers a BOOTP o
23. anagement Card Quick Configuration Overview Note Disregard the procedures described in this chapter if you have APC InfraStruxure Q Central as part of your system See the documentation for your device for more information You must configure the following TCP IP settings before the RDU can operate on a network s IP address of the RDU s Subnet mask e Default gateway Note If a default gateway is unavailable use the IP address of a computer that is located on the same subnet as the RDU and that is usually running The RDU uses the default gateway to test the network when traffic is very light Note Do not use the loopback address 127 0 0 1 as the default gateway address for the RDU It disables the card and requires you to reset the TCP IP settings to their defaults using a local serial login See Watchdog Features in the Introduction of the Rack PDU User x 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 RDU e APC Device IP Configuration Wizard See APC Device IP Configuration Wizard on page 1 e BOOTP or DHCP server See BOOTP and DHCP configuration on page 1 e Networked computer See Local access to the command line interface on page 1 or Remote access to the command line interface on page 1 44 Pumped Refrigerant System Operation and M
24. arm messages and suggested actions Alarm Message Severity Action Required Bypass Valve Actuator Fault Warning e Verify the actuator is connected properly e Tighten the linkage screw on the actuator shaft e Confirm that the rotary switch is pointing toward the top of the cooling unit when the valve in the fully closed position e For assistance contact Technical Support CM Communication Fault Critical e Verify that the power is ON to the Cooling Module e Contact Technical Support Condenser Inlet Warning e Make sure the temperature sensor entering the heat exchanger is Temperature Sensor Fault connected and placed properly e Make sure the Condenser Inlet temperature threshold is set correctly in the Sensor Measurements screen e If the problem persists contact Technical Support Condenser Outlet Pressure Critical e Make sure the pressure sensor leaving the heat exchanger is connected Sensor Fault and placed properly If the problem persists contact Technical Support Condenser Outlet Critical e Make sure the temperature sensor leaving the heat exchanger is Temperature Sensor Fault connected and placed properly If the problem persists contact Technical Support Condensing Temperature Waring e Verify that the chilled water temperature and flow is within High Violation specifications If the problem persists contact Technical Support Condensing Temperature Warning e Verify th
25. at the chilled water temperature and flow is within Low Violation specifications If the problem persists contact Technical Support CW Valve Actuator Fault Critical e Verify the actuator is connected properly e Tighten the linkage screw on the actuator shaft e Confirm that the rotary switch is pointing toward the top of the cooling unit when the valve is in the fully closed position e For assistance contact Technical Support DC Power Supply 1 Fault Critical e Contact Technical Support DC Power Supply 2 Fault Critical e Contact Technical Support Discrete Input Abnormal Warning e Contact Technical Support Entering Fluid Temperature Warning e Verify that the temperature sensor is properly installed High Violation e Make sure the chiller is operating properly If the problem persists contact Technical Support Inlet Water Temperature Warning e Make sure the temperature sensor is connected and placed properly Sensor Fault If the problem persists contact Technical Support Low Refrigerant Level Warning e Add necessary amount of refrigerant to maintain the minimum refrigerant level in the receiver No Redundant Pump Warning There are other Pump Faults that must be resolved If the problem persists contact Technical Support No Temperature Humidity Critical e Make sure the sensors are connected and configured properly Sensors Available e Make sure the CAN terminators are installed e Contact Technical Support Outlet Water Temperat
26. bmit your password Once the password is entered it remains in effect until the period of inactivity exceeds the Password Timeout setting See Password and timeout on page 1 Note Passwords are case sensitive Invalidate NOW Selecting this option will cause a logout immediately from either Admin or Device and the user must login again with the appropriate password to gain access Pumped Refrigerant System Operation and Maintenance 17 Start the RDU Path Main gt Operate gt Operate To start the RDU Select On The pumps will start when the pump starting conditions are met There must be a refrigerant reserve of at least 20 in the receiver The Subcooler Outlet Temperature must be less than or equal to 55 F and the Subcooler Outlet Temperature must be at least 0 3 F cooler than the Condensing Temperature The RDU will run according to the configured settings Q Note Operate only affects the local RDU You must set the Operate option for each RDU in the group Stop the RDU Path Main gt Operate gt Operate Select Standby The RDU will enter the standby mode and the CMs associated with the RDU will shut down This is not an alarm condition ADANGER HAZARD OF ELECTRIC SHOCK EXPLOSION OR ARC FLASH The Standby option does not remove power from the RDU You must disconnect power at the mains to remove power from the RDU Failure to follow these instructions can result in death or serious injury
27. d Persistent Receiver Pumped Dry Pump Fault Pumps Vapor Locked e If the problem persists contact Technical Support Subcooler Outlet Warning e Make sure the sensor is connected properly Temperature Sensor Fault If the problem persists contact Technical Support Temperature Humidity Warning e Inspect the DIP switches on the temperature humidity sensors and Sensor Duplicate CAN Address ensure that all the settings are unique Temperature Humidity Informational Notification that the addition of the new sensor has been recognized by Sensor N Added the RDU Temperature Humidity Informational Notification that the removal of the sensor has been recognized by the Sensor N Removed RDU Pumped Refrigerant System Operation and Maintenance 39 Alarm Message Severity Action Required Unit is in Maintenance Mode Critical e Service Technician may be troubleshooting the unit To return the unit to normal operation reset the unit Water Leak Detected Critical e Identify and isolate the source of the leak e For assistance contact Technical Support Water Leak Detected Warning e Identify and isolate the source of the leak Warning e For assistance contact Technical Support 40 Pumped Refrigerant System Operation and Maintenance CM alarm messages Alarm Number Alarm Message Severity Action Required 28 Air Filter Service Warning Clean or replace the air filter
28. d line interface use this command to disable the DHCP cookie requirement boot c disable OM Note To disable the requirement that a DHCP offer include the APC cookie clear the check Local access to the command line interface You can use a computer connected to the serial port on the front of the RDU to access the command line interface 1 Select a serial port at the local computer and disable any service that uses that port 2 Use the provided serial cable APC part number 940 0299 to connect the selected port to the serial port on the front panel of the InRow RD 3 Runa terminal program such as HyperTerminal and configure the selected port for 9600 bps 8 data bits no parity 1 stop bit and no flow control Save the changes 4 Press ENTER repeatedly if necessary to display the User Name prompt 5 Use ape for the user name and password See Command line interface on page 1 to finish the configuration Remote access to the command line interface From any computer on the same network as the RDU you can use ARP and Ping to assign an IP address to the RDU and then use Telnet to access its command line interface and configure the other TCP IP settings 46 Pumped Refrigerant System Operation and Maintenance Note After the RDU has its IP address configured you can use Telnet without first using Q ARP and Ping to access that RDU 1 Use the MAC address of the RDU in the ARP command to define the IP address
29. damage A WARNING DAMAGE TO EQUIPMENT OR PERSONNEL The equipment is heavy and can easily be tipped For safety purposes adequate personnel must be present when moving this equipment Failure to follow these instructions can result in death serious injury or equipment damage CAUTION HAZARD TO EQUIPMENT OR PERSONNEL All work must be performed by American Power Conversion APC by Schnieder Electric authorized personnel Failure to follow these instructions can result in death serious injury or equipment damage ANOTICE HAZARD TO EQUIPMENT Circuit boards contained within this unit are sensitive to static electricity Use one or more electrostatic discharge device while handling the boards Failure to follow these instructions can result in equipment damage 2 Pumped Refrigerant System Operation and Maintenance Commissioning After installation verify that all components are working properly and that the equipment is ready to begin operation Inspection Checklists Initial Inspection Checklist The initial inspection ensures that the equipment has been properly installed the location of the equipment has been properly prepared and the equipment is free of damage Note Although it is not necessary for the RDU to be installed in a room with a vapor barrier the computer room should have one as a vapor barrier minimizes moisture infiltration Without a vapo
30. e function is disabled Stop On Leak When set to Yes the RDU will stop if a Water Detection Fault activates Set to No to disable the RDU from stopping if a leak is detected Note The leak sensor APC part number AP9325 is optional Note There are several alarms that will cause the cooling unit to enter Stop mode e Water Detection Fault when Stop On Leak is set to Yes e Persistent Receiver Pumped Dry Pump 1 Fault must occur with Pump 2 fault to initiate Stop mode e Pump 2 Fault must occur with Pump 1 fault to initiate Stop mode e Persistent Pumps Vapor Locked See Alarm messages and suggested actions on page 1 for more information on alarms Pumped Refrigerant System Operation and Maintenance 19 20 Power Source The RDU has two AC inputs One input is redundant When Dual Feed is selected an alarm will initiate if either of the AC inputs fails If only one feed is used select Single Feed Fluid Temp High Thres Fluid Temperature High Threshold configure the entering fluid temperature high threshold An alarm will initiate when the inlet water temperature exceeds the threshold Bypass Mode Enable Disable Select Enable to operate the Bypass Valve Reset Options Run Hours resets the run hours for the two pumps or the two DC power supplies Pump Fault clears a pump fault Pump Fault must be selected to remove a Pump Fault Alarm Unassign RDU Removes the RDU from the group Any CMS associated to the unas
31. e sensors Return Air The temperature of the air entering the CM at the return temperature sensors 28 Pumped Refrigerant System Operation and Maintenance Service intervals Path Main gt Cooling Modules gt Select CM gt Configuration gt Service Intervals The service interval depends on environmental cleanliness Each component interval setting has an alarm If enabled the alarm will sound when the interval has elapsed The alarm is cleared by selecting Clear Alarms in the main menu Set the number of weeks to service the following Air Filter Maintenance Interval Only displays for CMs with air filters The default is 18 weeks Alarm gt Select gt Enabled Disabled Q Note The CM Air Filter interval alarm is enabled by default Pumped Refrigerant System Operation and Maintenance 29 Display Settings Set display interface settings including time and date units of measure passwords and time out settings You can also adjust the contrast key click beeper volume and beep on alarm settings Password and timeout Path Main gt Set Password information on how to enter the password Q Note The default user password is ape lowercase See Password entry on page 1 for more Change passwords Set the Admin and Device passwords D h ke 4 Move the selector arrow next to the Change Passwords option and press the ENTER key Select the password to change either Admin or Device Enter a new password
32. e sensors in the RDU Water In The temperature of the chilled water entering the RDU e Water Out The temperature of the chilled water leaving the RDU Condenser The temperature of the refrigerant leaving the condenser e Dew Point The temperature at which condensation will occur in the conditioned environment s Pump Outlet The temperature of the refrigerant leaving the pump e SubCool Out The temperature of the refrigerant leaving the sub cooler heat exchanger Cond Outlet The temperature of refrigerant leaving the heat exchanger e Cond Inlet The temperature of refrigerant entering the heat exchanger Pressures The pressure sensor readings e Cond Out The pressure of refrigerant leaving the heat exchanger Pump 1 Head The difference between the outlet pressure and the inlet pressure of Pump 1 e Pump 2 Head The difference between the outlet pressure and the inlet pressure of Pump 2 Speed and Volume The sensor readings displayed as RPMs or percentage of total capacity Pump 1 The speed of Pump 1 as a percentage of the total capacity e Pump 2 The speed of Pump 2 as a percentage of the total capacity e CW VLV The volume of chilled water passing through the valve expressed in percentage of total capacity e BypassVlv Pos The volume of chilled water passing through the bypass valve expressed in the percentage of the total capacity Power View power usage expressed in Amps DC Supply 1 The amo
33. ed Refrigerant System Operation and Maintenance Using the Path statement Select the main and sub menu options specified in the path statement to view or configure a setting The path statement lists the main and sub menu items you select to navigate to the item to view or modify The parts of the path statement are defined below Path Main gt Set Password gt Change Passwords Main gt Your starting point is the main menu Set Password gt Scroll to and select this option from the main menu Change Passwords gt Scroll to and select this option from the sub menu Subsequent options are listed and defined under the path statement Password entry The cooling unit has two levels of password protection Device password Allows Device Users to change basic and environmental settings Admin password Allows all privileges granted for Device Users and also allows the Administrator to modify settings that control the components in the RDU or CMS in the group or change advanced options When you try to change a setting the display interface prompts you to enter your Admin password The default value for both the Device and Admin password is ape lowercase To enter your password use the up or down arrow key to scroll through the available character set Press the ENTER key to select the current character and move the cursor to the next character position After selecting the last character of your password press the ENTER key once more to su
34. ens 15 Main menu screens 15 Navigating the screens 16 Sub menus 16 Using the Path statement 17 Password entry ciaci n Sen Td N rd N e tt TAR ae dia a 17 Start the RDU ue en ae ees ee tunes eu eos net 18 Stop the RDU 55 5 eee ees aii bai ee 18 Start a CM Remotely 18 Stop a CM Remotely 18 General Configuration 19 RDU configuration 19 CM Configuration 21 Identify the cooling modules 22 Pumped Refrigerant System Operation and Maintenance Group Configuration xx x x Spe e e rene dansent Modify a Cooling Module CM ID 23 View the groups 23 Unassign CMS tica it id ra E TA ed 23 Configure Modbus 23 Control the Environment Measurements 1 2 2 coterie ri nage mena mener regles 25 Group PIDS ii ia R ln mi et et Aan TRR alld 26 Tune the PIDIOGP tico ida aed ape Lane sms denis eee dune N 27 RDU component run hours 28 Reset RDU run hours
35. event log View event log Path Main gt View Event Log The event log keeps a record of all alarms and events The screen displays the following s The name of the event s The time and date the event occurred Use the arrow keys to scroll through the list of events and display the date and time for each event Clear event log Path Main gt Clear Event Log A confirmation screen is displayed when you select this option Enter the Admin password to erase the log Select YES to erase all of the events in the log Select NO to return to the main screen Respond to Alarms When an alarm is triggered the unit alerts you through the display by the following methods e Active alarm screen entry on scrolling status screens LEDs on the front panel display e An optional audible alarm every 30 seconds if enabled View active alarms Path Main gt View Alarms The View Alarms screen provides the number of alarms the severity and a brief description of the alarm Press the arrow keys to view the rest of the list Clear active alarms Path Main gt Clear Alarms A confirmation screen is displayed when you select this option Enter the Admin password to clear the alarm list Select YES to clear all of the alarms in the list Select NO to return to the main screen If the conditions that caused the alarm still exist those conditions cause the alarm to be regenerated Pumped Refrigerant System Operation and Maintenance 37 Al
36. f properly Ly The start up form was completed and sent to APC Pumped Refrigerant System Operation and Maintenance Operation The Pumped Refrigerant System System Operation The primary function of the Pumped Refrigerant System is to capture the heat generated by IT equipment and neutralize it before it mixes with the room air The pumped refrigerant system uses two circuits to remove heat In the first circuit water or a water glycol mixture is pumped from the chiller into a brazed plate heat exchanger located inside the RDU In the second circuit R134a refrigerant circulates from the RDU to Cooling Modules located either over the hot aisle or in the row Cooling Module fans draw in hot air across their micro channel coil completely evaporating the liquid refrigerant The refrigerant vapor then returns to the RDU There the vapor is condensed back into a liquid in the brazed plate heat exchanger which rejects the heat to the chilled water The system does only sensible cooling No energy is wasted in latent energy removal Less energy is used to satisfy the IT load A thermal containment system will further increase efficiency A conventional computer room air conditioner is used in conjunction with the pumped refrigerant system to provide humidity control The pumped refrigerant system is flexible Each system is configured to the user s specific requirements As cooling needs increase the system can be expanded A system may have
37. hnical Support Front OA Top RA 1 Return Air Temperature Critical Make sure the sensor is connected properly Sensor Fault If the problem persists contact Technical Support Middle 2 Return Air Temperature Critical Make sure the sensor is connected properly Sensor Fault e If the problem persists contact Technical Support Rear OA Bottom RA 12 Supply Air High Warning Make sure the sensor is connected properly Temperature Violation e Make sure the Supply Air High Temperature threshold is set correctly in the Thresholds screen e If the problem persists contact Technical Support 3 Supply Air Temperature Critical Make sure the sensor is connected properly Sensor Fault If the problem persists contact Technical Support Front OA only 4 Supply Air Temperature Critical e Make sure the sensor is connected properly Sensor Fault e If the problem persists contact Technical Support Rear OA only 33 Unit in Maintenance Critical Service Technician may be troubleshooting the unit To return the Mode unit to normal operation reset the unit 35 Upper Supply Critical Make sure the sensor is connected properly Temperature 1 Fault e If the problem persists contact Technical Support 36 Upper Supply Critical Make sure the sensor is connected properly Temperature 2 Fault e If the problem persists contact Technical Support 37 Upper Supply Critical Make sure the sensor is connected properly Temperature 3 Fault If
38. ick Enable or disable an audible tone that will sound every time a key is pressed on the display interface Beeper Volume Set the volume of the display interface alarm tone and for the audible tone that sounds every time a key is pressed on the display interface Beep On Alarm Set the cooling unit to sound an audible tone every 30 seconds when a new alarm occurs Silence the audible tone by pressing any key on the display interface When the alarm clears itself the tone will stop on its own Display units Path Main Menu gt Set Display Units Set the units of measure for the cooling unit to either US or Metric Pumped Refrigerant System Operation and Maintenance 31 Network Configuration The RDU is shipped with a Network Management Card that enables you to manage the RDU and attached CMs over your network Configure the network settings for the Rack PDU Network Management Card from the display interface The management card allows remote control and configuration of the equipment Configure the network 32 Path Main gt Configure Network MAC Address Displays the unique network identifier assigned to the Network Management Card of the RDU at the factory IP Address You will be prompted to enter an Admin password Enter the password and press ENTER to return to the IP screen Press ENTER again to change the following settings for Manual boot mode only s IP Enter the IP address assigned to the Network Management Card of
39. illed water supply Cooling modules Item Description Item Description O Sight glass ORD valve O Filter dryer Receiver Refrigerant pump output temperature sensor Liquid level sensor O Check valves Refrigerant HXGR output temperature sensor O Refrigerant pump 2 output pressure sensor MD Refrigerant HXGR output pressure sensor Refrigerant pump output pressure sensor Condenser O Isolation valves Refrigerant HXGR input temperature sensor Pump2 Two way water ball valves O Pump Leaving water temperature sensor Refrigerant subcooler output temperature sensor Entering water temperature sensor O Subcooler Pumped Refrigerant System Operation and Maintenance 11 OA Piping Diagram From RDU To RDU Item Description 6060000 12 Supply air temperature sensors Micro channel coil Fans Return air temperature sensors Electronic expansion valve EEV Remote rack inlet temperature sensor Supply air Return air Item Description 966000 Solenoid valve Supply liquid temperature sensor Refrigerant liquid pressure sensor Evaporator pressure regulator EPR Refrigerant vapor pressure sensor Return vapor temperature sensor Pumped Refrigerant System Operation and Maintenance RA Piping Diagram Naw 0017 YYY Y YY B Return Air Supply Air Item Description Item Description O Fan O Return air temperature sensors O Micro channel coil O Solenoid valve Retur
40. ion Press the up or down arrow key to interrupt the automatic scrolling and view a specific status screen Alarms Present If any alarms are present they will display IP The IP address of the RDU RDU Displays the current operating status of the RDU RDU ID Display the unique ID for this RDU User Defined Name The selected name is displayed User Defined Location The selected location is displayed s CMID Cooling Module ID Cool Out Output displayed in kW e Cool Stpt Displayed in F or C Rack Inlet Displayed in F or C Status Path Main gt RDU gt Status gt Overview View information specific to this RDU Op Mode The RDU is in one of the following modes e On The RDU is pumping refrigerant to the CMs at the proper condensing temperature Standby The RDU is receiving power but not enabled for pumping Stop The RDU has stopped due to an unrecoverable condition For more information see Stop On Leak on page 1 Lead Pump Specifies which refrigerant pump is operating presently either Pump 1 or Pump 2 RefLeak Specifies Calibration Status as Suspended Calibrating Operating or Disable Path Main gt RDU gt Status gt Active TH Sensors Displays a list of Temperature Humidity sensors by address present in the system Pumped Refrigerant System Operation and Maintenance 33 Path Main gt RDU gt Status gt Measurements Temperatures The temperature at each of th
41. ld arise based on the use of this Publication The information contained in this Publication is provided as is and has been prepared solely for the purpose of evaluating data center design and construction This Publication has been compiled in good faith by American Power Conversion Corporation However no representation is made or warranty given either express or implied as to the completeness or accuracy of the information this Publication contains IN NO EVENT SHALL AMERICAN POWER CONVERSION CORPORATION OR ANY PARENT AFFILIATE OR SUBSIDIARY COMPANY OF AMERICAN POWER CONVERSION CORPORATION OR THEIR RESPECTIVE OFFICERS DIRECTORS OR EMPLOYEES BE LIABLE FOR ANY DIRECT INDIRECT CONSEQUENTIAL PUNITIVE SPECIAL OR INCIDENTAL DAMAGES INCLUDING WITHOUT LIMITATION DAMAGES FOR LOSS OF BUSINESS CONTRACT REVENUE DATA INFORMATION OR BUSINESS INTERRUPTION RESULTING FROM ARISING OUT OR IN CONNECTION WITH THE USE OF OR INABILITY TO USE THIS PUBLICATION OR THE CONTENT EVEN IF AMERICAN POWER CONVERSION CORPORATION HAS BEEN EXPRESSLY ADVISED OF THE POSSIBILITY OF SUCH DAMAGES AMERICAN POWER CONVERSION CORPORATION RESERVES THE RIGHT TO MAKE CHANGES OR UPDATES WITH RESPECT TO OR IN THE CONTENT OF THE PUBLICATION OR THE FORMAT THEREOF AT ANY TIME WITHOUT NOTICE Copyright intellectual and all other proprietary rights in the content including but not limited to software audio video text and photographs rests with American Power Conversion
42. lowing ranges Cool Stpt 22 2 C 66 90 F This setting is only available in InRow mode Supply Stpt 17 8 29 4 C 64 0 84 9 F Note The Supply Stpt setting is defined by APC authorized personnel only when the group is commissioned Note The Supply Stpt setting must never be set higher than the Cool setpoint Fan Speed When the CM is programmed for HACS or RACS mode and Air Flow is set to Auto the Air Flow property specifies the desired temperature difference dT across the IT equipment When the CM is programmed for InRow HACS or RACS with Air Flow set to Manual select the Fan Speed from the following options s Low 16 7 C 30 F DT 60 of maximum fan speed e Med Low 13 9 C 25 F DT 70 of maximum fan speed Med 11 1 C 20 F DT 80 of maximum fan speed e Med High 6 3 C 15 F DT 90 of maximum fan speed High 5 6 C 10 F DT 100 of maximum fan speed The Fan Speed setting is ignored when the CM is set to the InRow mode and Air Flow is set to Auto 24 Pumped Refrigerant System Operation and Maintenance Air Flow Manual Auto RA only Cfg Type Select the cooling configuration from the following options In Row The air flow is not ducted The hot aisle air is cooled and the cooled air supply is shared by all loads in the row e RACS Rack Air Containment System Air flow in the enclosure is controlled by a ducting system fitted to the enclosure HACS Hot Aisle Containment Syste
43. m Air flow in the room is controlled by enclosing the hot air aisle The loads share an enclosed common hot aisle Light On Time The number of minutes the task lights will remain on after movement is detected OA only Dsp Units US Metric Measurements Path Main gt Groups gt Select Group gt Measurements View sensor readings from the CMs as a combined average from the display interface of the RDU Cool Output Capacity output in kW Avg Sply Air The combined average supply air temperature of all CMs in the group in C F Avg Ret Air The combined average return air temperature of all the CMs in the group displayed in C F Avg Fan The combined average fan speed of all the CMs in the group displayed in percent of full scale 0 100 Airflow Avg CFM The combined average cubic feet per minute CFM of air flow that the CMs are creating Total CFM The combined total CFM of all CMs in the group Pumped Refrigerant System Operation and Maintenance 25 Group PIDs 26 Path Main gt Groups gt Select Group Set Cool PID Tune the Rack Inlet Temperature Controller InRow mode only Reset to Defaults Resets to the default settings The Proportional plus Integral plus Derivative PID loop controls the output of the fans ANOTICE HAZARD TO EQUIPMENT This procedure is to be performed by APC authorized personnel only Improperly set PID controls could result in equipment damage
44. m LED Menu selection scroll up key Enter key Alarm code LED Rack inlet temperature LED Pumped Refrigerant System Operation and Maintenance Menu selection scroll down key Display Operation The display scrolls automatically through the sensor readings and alarms from the items listed to the right side of the display screen To view information from the items listed to the left of the display screen press the ENTER key and use the up or down keys to move through the display All CMs have a three digit LED display The capability of the display is limited to relaying sensor readings the identification number of the CM and alarms by number only Alarm levels are indicated by the LEDs See the display interface on the RDU for alarm descriptions or for interactive ability The RDU comes with an infrared remote control which is used to operate the OAs The remote has a menu selection scroll up scroll down and enter key OAs only have a motion sensor to activate the lights Cooling Modules are powered on or off from the individual CM not from the RDU Cooling On Off press the ENTER key on the display interface The Status LED will illuminate The display interface will read On Press the Enter key once more to turn cooling to Standby Disable On Off lights OA only Press the ENTER key on the display interface Press the Menu selection Scroll Down key once The Lights LED will illuminate The display interface screen will read
45. multiple RDUs One RDU can supply OA Cooling Modules and RA Cooling Modules Q Note Only APC certified technicians should service the pumped refrigerant system Refrigerant Circulation Each cooling module is connected to the RDU by overhead or under floor refrigerant distribution piping Q Note Under floor refrigerant piping is not recommended Multiple electronic valves in each CM automatically regulate the refrigerant flow and coil temperature to met the IT load at the desired supply air set point See the OA Piping Diagram on page 1 for the locations of the valves and sensors on the OA Cooling Modules See RA Piping Diagram on page 1 for the locations of the valves and sensors on the RA Cooling Module Refrigerant is circulated through the system by two fully redundant refrigerant pumps The RDU display interface allows you to program the number of run hours a pump will operate before switching to the second pump Pump redundancy ensures that the cooling modules continue to run uninterrupted The RDU is equipped with a subcooler to further cool the refrigerant leaving the brazed plate heat exchanger This additional subcooling allows the refrigerant pumps to operate correctly and efficiently while responding to varying IT loads 8 Pumped Refrigerant System Operation and Maintenance In the absence of an IT load or when all the CMs are turned off the RDU refrigerant pumps continue to operate by bypassing the refrigera
46. n vapor temperature sensor Refrigerant liquid pressure sensor O Refrigerant vapor pressure sensor Supply liquid temperature sensor O Evaporator pressure regulator EPR Electronic expansion valve EEV Service port Remote rack inlet temperature sensor O Rotalock adapter Supply air temperature sensors Pumped Refrigerant System Operation and Maintenance 13 Display Interface The display interface in the RDU also displays information pertinent to itself and to other system components OAs RAs and other Cooling Modules are identified as CMs on the display interface screens i CD T Item Description Function O Critical Alarm LED red When lit a critical alarm condition exists and requires your immediate attention 0 Warning Alarm LED yellow When lit a warning alarm condition exists Failure to correct this condition could cause a critical alarm Check Log LED yellow When lit at least one new event has been logged since the last time the log was checked Only events that pertain to the operation of the RDU or cooling modules in the group will activate the LED G Status LED green When lit the RDU is receiving electrical power When flashing green the RDU is downloading firmware for the controller This may take several minutes 5 Liquid Crystal Display LCD View alarms status data context sensitive help and modify configurable items G Up and down arrow keys
47. nt through a pump head pressure control valve This head pressure control valve allows continuous operation of the pumps regardless of the load While in bypass the refrigerant pumps reduce to a minimum speed allowing minimal power consumption and avoid the wear of frequent starts and stops See the Pumped Refrigerant System Piping Diagram on page for the locations of the RDU components discussed above The RDU monitors room conditions to control the refrigerant condensing temperature relative to the room dew point See the RDU Installation Manual OA Installation Manual and RA Installation Manual for more information System Architecture The pumped refrigerant system can be configured based on the customer requirements Examples below illustrate group usage with a single RDU One RDU One Group CAN Bus asees Liquid Supply Vapor Return na3393a One RDU Two Groups Pumped Refrigerant System Operation and Maintenance The example below shows two R DUS employed to control three groups of CMs CAN Bus Liquid Supply Two RDUs Three Groups Vapor Return 10 Pumped Refrigerant System Operation and Maintenance Pumped Refrigerant System Piping Diagram Ch
48. ny Alarm or Critical that causes the output to change from its normal state Output Normal State Set the normal state of the contact open or closed If the state of an alarm or event mapped to this contact changes from the normal state the contact also changes state Reboot the Network Management Card Path Main gt RDU gt Configuration gt ResetOptions Reset NMC The NMC is rebooted This is done without interrupting the operation of the pumped refrigerant system You will be prompted for a confirmation Yes No Pumped Refrigerant System Operation and Maintenance CM Configuration Path Main gt Cooling Modules gt Select CM gt Configuration gt Parameters Startup Dly Enter a value for the delay The startup delay begins when the unit is started and initialized The CM cannot begin operation until this delay expires Use the startup delay to restart equipment sequentially after a scheduled downtime or a power outage Power Source The CM has two AC inputs One input is redundant When Dual Feed is selected an alarm will initiate if either of the AC inputs fails If only one feed is used select Single Feed Disp On Off Enables Disables the On Off control on the local display of the CM Stop Cool Fail If enabled the unit will shut down if a Cool Fail condition is detected Cool Fail is a condition where the difference between the supply air temperature of the CMs and 90 F integrated over time exceeds 300 seconds given
49. of its components has operated When a component is replaced use the Reset Run Hours option to reset the run hours for the displayed component to zero Path Main gt RDU gt Status gt Run Hours Run Hours View the run hours for the Refrigerations Pumps 1 and 2 and for the DC Power Supplies 1 and 2 Reset RDU run hours Path Main gt RDU gt Configuration gt Reset Options gt Run Hours Reset Run Hrs Reset the run hours for the Refrigerations Pumps 1 and 2 and for the DC Power Supplies 1 and 2 when one of these components is replaced CM component run hours Path Main gt Cooling Modules gt Select CM gt Status gt Run Hours Run Hrs View the run hours for the fans and fan air filters RA only of the selected CM Reset CM run hours Path Main gt Cooling Modules gt Select CM gt Configuration gt Reset Run Hours Reset Run Hrs Reset the run hours for the fans and fan air filters RA only of the selected CM after they are replaced Thresholds Set alarms to alert you to threshold violations Path Main gt Cooling Modules gt Select CM gt Configuration gt Alarm Threshlds When the monitored input violates the set temperature threshold of the CM an alarm will occur Set thresholds for the following sensors Rack Inlet The temperature of the air entering the rack at the rack inlet sensor Supply Air The average temperature of the air output from the CM measured by the supply air temperatur
50. oling Modules Each RDU can support multiple overhead or in row Cooling Modules Cooling Modules are identified as CMs on the display interface screens of the RDU and in this manual The exact type of Cooling Module is identified where specificity is required on both the display interface and in this manual Note the definitions for the icons here and be observant for them throughout this manual They are intended to call attention to potential hazards and important information Save these instructions This manual contains important instructions that must be followed during installation operation and maintenance of the Rack PDU Pumped Refrigerant System Operation and Maintenance Safety Read and adhere to the following important safety considerations when working with this unit ADANGER HAZARD OF ELECTRIC SHOCK EXPLOSION OR ARC FLASH Turn off all power supplying this equipment before working on the equipment All electrical work should be performed by licensed electricians Practice lockout tagout procedures Do not wear jewelry when working with electrical equipment Failure to follow these instructions can result in death or serious injury A WARNING HAZARD FROM MOVING PARTS Keep hands clothing and jewelry away from moving parts Check the equipment for foreign objects before closing the doors and starting the equipment Failure to follow these instructions can result in death serious injury or equipment
51. r BMS start calibration from the above path Choose Calibrating to initiate the feature When Calibration is complete the leak detector will automatically start leak monitoring Leak monitoring will continue as long as the RDU is on the configuration of the system has not changed and the total system load exceeds 3 kW Note Leak detection is Suspended and a Warning alarm will come on when Q 1 Refrigerant is added to the system 2 CMs are added or removed from the system 3 CMs are placed into Standby Evacuation Stop or Maintenance modes Pumped Refrigerant System Operation and Maintenance 51 Monthly Preventive Maintenance Photocopy the following pages and use them during the maintenance procedures After they have been completed save them for future reference Prepared By Model Number Serial Number Date Environment q In what type of room is the equipment located q Is the equipment maintaining the temperature setpoint Temperature setpoint q Is there visible damage to the equipment dents scratches q Check for environmental damage dirt dust debris liquid stains around the installation area q Record the room temperature near the returns of the cooling modules Temperature q Record the alarm history for the last month Cleanliness q Check the condition of the area around the unit Clean if necessary q Check for accumulation of deb
52. r DHCP server from the Utility CD or the APC Web site www apc com If neither of these servers is available see APC Device IP Configuration Wizard on page 1 Local access to the command line interface on page 1 or Remote access to the command A user configuration ini file can function as a BOOTP or DHCP boot file For more Es information see the TCP IP configuration section of the InRow RD User s Guide available line interface on page 1 to configure the needed TCP IP settings BOOTP For the Rack PDU to use a BOOTP server to configure its TCP IP settings it must find a properly configured RFC951 compliant BOOTP server In the BOOTPTAB file of the BOOTP server enter the RDU s MAC address IP address subnet mask and default gateway and optionally a bootup file name Look for the MAC address on the bottom of the RDU or on the Quality Assurance slip included in the package When the RDU reboots the BOOTP server provides it with the TCP IP settings e If you specified a bootup file name the RDU attempts to transfer that file from the BOOTP server using TFTP or FTP The RDU assumes all settings specified in the bootup file e If you did not specify a bootup file name you can configure the other settings of the RDU remotely through its Web interface or command line interface the user name and password are both ape by default To create a bootup file see your BOOTP server documentation Pumped Ref
53. r barrier it will be difficult to maintain the humidity in the room Do not introduce unconditioned outside air into the computer room Note minimum of 900 mm 36 in of clear floor space in front of the RDU is required for service access Ensure the installation procedure is complete according to the installation manual If the RDU is installed in the computer room ensure that the walls floor and ceiling of the room where the equipment is located are sealed with a vapor barrier Ensure there is no evidence of damage to the equipment Ensure the equipment is level Ensure that the equipment is joined to the adjacent racks if it is installed at the end of a row DO DD oC Ensure the clearance around the equipment is in accordance with local and national codes and regulations as well as the installation manual Pumped Refrigerant System Operation and Maintenance Electrical Inspection Checklist The electrical inspection verifies that all electrical connections are secure and correct and that the equipment is properly grounded ADANGER HAZARD OF ELECTRIC SHOCK EXPLOSION OR ARC FLASH Turn off all power supplying this equipment before working on the equipment All electrical work should be performed by licensed electricians Practice lockout tagout procedures Do not wear jewelry when working with electrical equipment Failure to follow these instructions can result in death or serious injury Ensure
54. rSubnetMask c tcpip g yourDefaultGateway For each variable type a numeric value that has the format xxx xxx xxx xxx For example to set a system IP address of 156 205 14 141 type the following command and press ENTER tcpip i 156 205 14 141 3 Type exit The RDU restarts to apply the changes Pumped Refrigerant System Operation and Maintenance 47 How to Recover from a Lost Password You can use a local computer that connects to the RDU through the serial port to access the command line interface 48 1 2 Select a serial port at the local computer and disable any service that uses that port The APC serial cable not provided is used to connect the console port at the RDU and to your computer This cable is available to order from APC Run a terminal program such as HyperTerminal and configure the selected port for 9600 bps 8 data bits no parity 1 stop bit and no flow control Press ENTER repeatedly if necessary to display the User Name prompt If you are unable to display the User Name prompt verify the following The serial port is not in use by another application The terminal settings are correct as specified in step 3 The correct cable is being used as specified in step 2 Press the Reset button The Status LED will flash alternately orange and green Press the Reset button a second time immediately while the LED is flashing to reset the user name and password to their default
55. rigerant System Operation and Maintenance 45 DHCP You can use an RFC2131 RFC2132 compliant DHCP server to configure the TCP IP settings for the RDU This section summarizes the RDU s communication with a DHCP server For more detail about how a DHCP server can configure the network settings for a RDU see DHCP Configuration in the RDU User s Guide on the Utility CD 1 The RDU 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 MAC address of the RDU A User Class Identifier by default the identification of the application firmware installed on the RDU 2 A properly configured DHCP server responds with a DHCP offer that includes all the settings that the RDU needs for network communication The DHCP offer also includes the Vendor Specific Information option DHCP option 43 By default the RDU ignores DHCP offers that do not encapsulate the APC cookie in DHCP option 43 using the following hexadecimal 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 cookie See your DHCP server documentation to add code to the Vendor Specific Information option box Require vendor specific cookie to accept DHCP Address in the Web interface Administration gt Network gt TCP IP gt DHCP Alternately at the comman
56. ris Clean as required 52 Pumped Refrigerant System Operation and Maintenance Mechanical ADANGER HAZARD OF ELECTRIC SHOCK EXPLOSION OR ARC FLASH Turn off all power supplying this equipment before working on the equipment All electrical work should be performed by licensed electricians Practice lockout tagout procedures Do not wear jewelry when working with electrical equipment Failure to follow these instructions can result in death or serious injury q Which refrigerant pump is operating Pump 1 run hours Pump 2 run hours q Record the refrigerant pump operating information Pressure Speed q Record the inlet and outlet temperatures for the heat exchanger Inlet temperature Outlet temperature Electrical ADANGER HAZARD OF ELECTRIC SHOCK EXPLOSION OR ARC FLASH Turn off all power supplying this equipment before working on the equipment All electrical work should be performed by licensed electricians Practice lockout tagout procedures Do not wear jewelry when working with electrical equipment Failure to follow these instructions can result in death or serious injury q Inspect the electrical panel for tight connections and for overheated connections from loose contact terminals q Confirm the incoming main voltage matches the equipment nameplate The measurement should be within 10 of the nameplate listing Pumped Refrigerant S
57. s detect less or more CMs than this value Unassign CMs Two menu paths are available to unassign cooling modules 1 From this menu select the CM ID to unassign Press the ENTER key and Select Yes Path Main gt CMs in Network gt All Assigned CMs 2 From this menu press the ENTER key and select Path Main gt Cooling Modules gt Select CM gt Configuration gt Unassign CM Configure Modbus Path Main gt Configure Modbus Modbus Enable or Disable the Modbus communication protocol Target Id Each Modbus device must have a unique target identification number Enter a unique number from to 247 for the RDU Baud Rate 9600 bps Pumped Refrigerant System Operation and Maintenance 23 Control the Environment The primary function of the Pumped Refrigerant System is to capture the heat generated by IT equipment and neutralize it before it mixes with the room air Controls in the RDU monitor room conditions to ensure the leaving refrigerant temperature to the CMs is always above the room dew point Ina HACS or RACS environment the CMs neutralize the heat accumulated in the common hot aisle and expel it into the surrounding environmental space at the desired temperature Path Main gt Groups gt Select Group gt Setpoints A setpoint is the target value that a cooling group tries to maintain The default setpoints are appropriate for most cooling applications The setpoints for each mode must be within the fol
58. s temporarily O Note Pressing the Reset button will reboot the controller causing a temporary loss of cooling Press ENTER repeatedly if necessary to display the User Name prompt again then use the default 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 repeat step 5 and log on again At the command line interface use the following commands to change the User Name and Password settings both of which are now ape user an yourAdministratorName user ap yourAdministratorPassword For example to change the Administrator user name to Admin type user an Admin Type quit or exit to log off reconnect any serial cable you disconnected and restart any service you disabled Pumped Refrigerant System Operation and Maintenance CM Display OA display Cooling RA display a3134b ni wo evan TEMP ae System na3132a Item Description 6006600006000000 na3392a 90000000 Infrared remote control receiver Status LED Lights LED Warning LED Critical alarm LED Menu selection scroll up key Enter key Menu selection scroll down key Alarm code LED Rack inlet temperature LED Supply air temperature LED Unit ID LED Motion sensor for lights Infrared remote control Item Description Status LED Warning LED Critical alar
59. signed RDU will also become unassigned RefrigLeak Enable Enable or disable refrigerant leak detection When enabled a Critical alarm will alert you if a loss is detected A Warning alarm will alert you if leak detection is suspended Leak monitoring will continue as long as the RDU is ON the configuration of the system has not changed and the total system load exceeds 3 kW Refrigerant Cal Calibrates the refrigerant leak detector The refrigerant leak detector must be calibrated before use Additionally the refrigerant leak detector function must be Enabled before it can be calibrated See RefLeak on page 1 for information on Calibration Status settings The RDU and CMs must be ON with a minimum system load of 5kW When calibration is complete the leak detector will automatically start leak monitoring Calibrate e following the addition or removal of CMs e anytime refrigerant is added to the system Lead Pump Assigns the lead pump of the two refrigerant pumps in the RDU When the pump rotation time is reached the RDU will change the assignment of Lead Pump to the lag pump See Pump Changeover on page to set up pump rotation time View and edit the state of input and output contacts Input Normal State Set the normal state of the contact open or closed The RDU changes its operating mode to Standby when the actual state differs from the normal state Output Source Define the type of output source alarm either A
60. temperature reaches a stable value increase the proportional constant by 0 5 Ifthe temperature does not respond to this change adjust the setpoint 4 Repeat step 3 until the temperature value starts to oscillate and the peak amplitude of the oscillations is constant 5 Note the time in minutes between the peaks of the oscillations This is the Ultimate Period PU 6 Note the value of the proportional constant This is the Ultimate Gain GU 7 Compute the PID constants using the table below Use the equations for that control method in the row to compute the values for each constant Control Method Proportional Integral Derivative P 0 5 GU P I 0 45 Gy 0 54 Gy PU P I D 0 6 GU 1 2 GU PU 0 075 GU PU 8 Set each constant according to these calculations Pumped Refrigerant System Operation and Maintenance Further tune the PID loop in the following ways to account for changes in the room load Loop Behavior PID Tuning Correction Slow response to temperature changes Increase the proportional multiplier or increase the derivative multiplier Overcooling undercooling after changes in the Increase the derivative or the proportional multiplier room load or changes in setpoint Environmental temperature never reaches the Increase the integral multiplier setpoint Overcooling undercooling on constant room load Decrease the integral multiplier RDU component run hours The RDU records the number of hours each
61. that the Incoming voltages match the phase and voltage listing on the nameplate Electrical wiring complies with local and national codes and regulations Equipment is properly grounded Access doors are properly grounded Electrical connections are tight including contactors terminal blocks controllers switches relays auxiliary devices and field connections oO D O O D C Circuit breakers are properly connected and securely attached Pumped Refrigerant System Operation and Maintenance Mechanical Inspection Checklist The mechanical inspection verifies that all mechanical components and connections are secure and tight and ready for start up and system charging the cooling unit or surrounding equipment Q Note Improperly installed piping may result in improper operation and possible damage to Ensure that the R Chilled water pipe fittings are tight and have been leak checked Leak check pressure can not exceed 300 psi 2068 kpa Air is bled from the water system If air remains in the system bleed it out now Mechanical connections are tight Supply chilled water temperature is recorded Chilled water flow is correct based on the performance requirements of the RDU Field installed traps and piping are in accordance with the installation manual Strainers are in place in the chilled water supply loop Proper piping practices have been followed Piping is adequatel
62. unt of current used by DC power supply 1 e DC Supply 2 The amount of current used by DC power supply 2 Total DC PS The amount of current used by both DC power supplies Contacts View the state of input and output contacts Input State Open or Closed Output State Open or Closed 34 Pumped Refrigerant System Operation and Maintenance Path Main gt Cooling Modules gt Select CM gt Status gt Overview Temperature The temperature at each of the sensors in the selected CM Rack Inlet The temperature of the air entering the rack at the remote temperature sensor Supply Air The average temperature of the air entering the CM as measured by the supply air temperature sensors Return Air The average temperature of the air leaving the CM as measured by the return air temperature sensors Liquid In The temperature of the pumped refrigerant entering the CM as measured by the liquid refrigerant temperature sensor Vapor Out The temperature of the pumped refrigerant leaving the CM as measured by the vapor refrigerant temperature sensor Evaporator The evaporation temperature of the refrigerant as it leaves the evaporator Pressures The pressure sensor readings Liquid In The pressure of the pumped refrigerant entering the CM as measured by the liquid refrigerant pressure transducer Vapor Out The pressure of the pumped refrigerant leaving the CM as measured by the vapor refrigerant pressure transducer Valve
63. up to 8 characters Press the ENTER key to confirm Timeout Set the length of time which can elapse when no keys are pressed before the display interface returns to the scrolling screen status The password must then be entered to regain access Invalidate Override the password timeout and require password entry immediately Date and time Path Main gt Set Date amp Time Set the time Enter the correct time and press the ENTER key The Time is displayed on some status screens and is also used in the alarm and event logs to time stamp events Set the date Enter the day month and year and press the ENTER key The Date is displayed on some status screens and is also used in the alarm and event logs to date stamp events Set the format Use the up or down arrow key to select the date Format setting mm dd yyyy 11 16 2009 Default yyyy mm dd 2009 11 16 dd mmm yy 16 Nov 09 mmm dd yy Nov 16 09 dd mm yyyy 16 11 2009 Identify the RDU by Name and Location Path Main gt Set Identification User Defined Name Use this to identify the unit by giving the unit a name User Defined Loc Use this to identify the unit by its location 30 Pumped Refrigerant System Operation and Maintenance Adjust display Path Main Menu gt Configure Display Contrast Adjust the visibility of the screen text Lower numbered settings provide darker text higher numbers provide lighter text Settings range from 0 7 Key Cl
64. ure Modbus Set Date amp Time Set Password gt T na162 Sub menus Selecting a main menu option displays the sub menu screen for that option In this example the selector arrow is on the top line of the Set Date and Time sub menu screen DTime 13 15 23 Date 18 Nov 2010 Format dd mm y yyy na1623c Use the up or down arrow key to move the selector arrow to an option and press the ENTER key e List of choices If the setting is a list of choices an input arrow displays next to the setting Press the up or down arrow key to select the menu option to change Then press the ENTER key to exit the input mode and save the setting Press the Esc key to exit without saving e Numbers or text fields If the setting is a number or text field use the arrow keys to select the value of the first character and press the ENTER key to move to the next character Press the ENTER key after the last character is set to exit the input mode and save the setting Press the ESC key to exit without saving If an invalid value is entered the display interface beeps and restores the previous valid value to the field Input arrows Input arrows next to a selected setting indicate that the setting can be modified by pressing the up or down arrow key Press the ENTER key to save the change or the Esc key to cancel the change Time 13 15 23 Date 118 Nov 2010 ee dd mm yyyy na1622a 16 Pump
65. ure Warning e Make sure the sensor is connected properly Sensor Fault e Make sure the Water Out temperature threshold is set correctly in the Sensor Measurements screen If the problem persists contact Technical Support Persistent Pumps Vapor Critical e Contact Technical Support Locked 38 Pumped Refrigerant System Operation and Maintenance Alarm Message Severity Action Required Persistent Receiver Pumped Critical Dry e Verify that there is adequate refrigerant in the system e Verify that the Cooling Modules are functioning properly e If the problem persists contact Technical Support Primary Power Source Failure Warning Ensure that the power source is connected properly and within specifications e If the problem persists contact Technical Support Secondary Power Source Warning Failure Ensure that the power source is connected properly and within specifications e If the problem persists contact Technical Support Pump 1 Discharge Pressure Critical Sensor Fault e Make sure the pressure sensor is connected properly e If the problem persists contact Technical Support Pump 1 Fault Warning e Contact Technical Support Pump 1 High Head Pressure Warning e Contact Technical Support Pump 2 Discharge Pressure Critical Sensor Fault e Make sure the pressure sensor is connected properly If the problem persists contact Technical Support Pump 2
66. vity at the keys of the display Operate interface exceeds the Password Timeout setting the display Braoa interface returns to the scrolling status screens PEU Cooling Modules For information on setting the time out duration de 4 35 CMs in Network see Password and timeout on page 30 View Alarms Clear Alarms View Event Log All main menu choices are displayed on a series of main menu screens as ler Event Gee shown Configure Modbus i Set Date amp Time Set Password Set Display Unit Configure Display Configure Network Set Identification na3119a Pumped Refrigerant System Operation and Maintenance Navigating the screens Selector arrow Press the up or down arrow key to move the selector arrow to a menu option Press the ENTER key to view the selected sub menu screen In the example shown below the selector arrow points to the Set Date and Time setting To select that item press the ENTER key Clear Event Log 4 el Configure Modbus Set Date amp Time Set Password y na1623d Note If the selector arrow is on the top line of a main menu screen press the up arrow key to move the selector arrow to the top line of the previous screen Continue arrows Continue arrows indicate that additional options or settings are available on a menu or status screen Press the up or down arrow key to view the additional items Clear Event Log Config
67. y high rate of speed Upper or lower supply air sensor e Either the upper or lower supply air temperature sensor has a fault Verify that both supply air temperature sensors are installed and working properly Pumped Refrigerant System Operation and Maintenance 55 APC Worldwide Customer Support Customer support for this or any other APC product is available at no charge in any of the following ways e 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 e Contact the APC Customer Support Center by telephone or e mail Local country specific centers go to www apc com support contact for contact information For information on how to obtain local customer support contact the APC representative or other distributors from whom you purchased your APC product O 2012 APC by Schneider Electric APC the APC logo and InRow are owned by Schneider Electric Industries S A S American Power Conversion Corporation or their affiliated companies All other trademarks are property of their respective owners 990 3421B 001 1 2012
68. y supported and isolated when necessary Field installed service valves are open Water outlet temperature sensor is positioned correctly See the installation manual for correct positioning Piping in the building and on the roof is properly insulated Pumped refrigerant piping joints are tight and have been leak checked Leak check pressure can not exceed 150 psi 1034 kpa Pressure relief valve is installed in accordance with the installation manual as well as local and national codes and regulations Refrigerant lines have been evacuated to ensure foreign particles have been removed from the system Evacuation level must be at a minimum 500 microns for 2 hours All piping chilled water and refrigerant vapor is properly insulated ooo E 0 O O O O Di O D O C Covers and guards are in place Pumped Refrigerant System Operation and Maintenance User Interface Inspection Checklist The user interface inspection verifies that the sensors and internal communication links are installed properly Check that the outdoor heat exchanger is connected to the RDU s Ensure that R An A Link bus is connected to each RDU or cooling module CM and a terminator is plugged into all unused A Link connectors An A Link bus is connected to the external temperature and humidity sensor APC part number AP9520TH The input contacts and output relays are connected correctly The building management system is
69. ystem Operation and Maintenance 53 Quarterly Preventive Maintenance Perform all the Monthly Preventive Maintenance items and the items below Prepared By Model Number Serial Number Date Mechanical ADANGER HAZARD OF ELECTRIC SHOCK EXPLOSION OR ARC FLASH Turn off all power supplying this equipment before working on the equipment All electrical work should be performed by licensed electricians Practice lockout tagout procedures Do not wear jewelry when working with electrical equipment Failure to follow these instructions can result in death or serious injury q Clean the dust from door perforations Functional tests q Verify the cooling operation mode is functioning properly Semi Annual Preventive Maintenance Perform all the Monthly Quarterly Preventive Maintenance items and the items below Prepared By Model Number Serial Number Date Cleanliness q Check the cleanliness of the unit Clean if required 54 Pumped Refrigerant System Operation and Maintenance Troubleshooting Corrective Action e Verify that the display interface cable is connected properly Possible Cause e Display interface not connected properly Alarms do not show up External on monitoring equipment monitoring Customer Output equipment is not Contact receiving power or is not functioning Problem Display interface not operational but equipment operates

APC ACRA100 hardware cooling accessory

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