Dell 3750W User Manual

Dell 3750W User Manual

Online rack ups 3750w and 4200w
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Dellt Online Rack UPS
3750W and 4200W
User's Guide
K804N, H952N, J730N, K805N
w w w . d e l l . c o m | s u p p o r t . d e l l . c o m


Table of Contents

Summary of Contents for Dell 3750W

  • Page 1 Dellt Online Rack UPS 3750W and 4200W User's Guide K804N, H952N, J730N, K805N J739N w w w . d e l l . c o m | s u p p o r t . d e l l . c o m...
  • Page 2 Reproduction in any manner whatsoever without the written permission of Dell Inc. is strictly forbidden. Trademarks used in this text: Dell and the DELL logo are trademarks of Dell Inc.; Greenlee is a registered trademark of Greenlee Textron; National Electrical Code and NEC are registered trademarks of National Fire Protection Association, Inc.; Phillips is a registered trademark of Phillips Screw Company.
  • Page 3: Table Of Contents

    Table of Contents Introduction Finding Information ..........Safety Warnings Installation Inspecting the Equipment...
  • Page 4 ....... . Dell Network Management Card (Optional) ......
  • Page 5 UPS Maintenance UPS and Battery Care ..........Transporting the UPS .
  • Page 6: Introduction

    — causing hours of lost productivity and expensive repairs. With the Dell Online Rack UPS, you can safely eliminate the effects of power disturbances and guard the integrity of your equipment. The UPS's flexibility to handle an array of network devices makes it the perfect choice to protect your LANs, servers, workstations, and other electrical equipment.
  • Page 7 S Optional Dell Network Management Card with enhanced communication capabilities for increased power protection and control. S Advanced power management with the Dell UPS Management Software for graceful shutdowns and power monitoring. S Sequential shutdown and load management through separate receptacle groups called load segments.
  • Page 8: Finding Information

    S Specifications Dell UPS User's Guide S How to configure UPS settings The user's guide is available on the Dell UPS disc and on S How to troubleshoot and solve problems S How to install REPO control...
  • Page 9: Safety Warnings

    S To reduce the risk of fire, connect only to a circuit provided with branch circuit overcurrent ® ® protection with an ampere rating in accordance with the National Electrical Code (NEC ANSI/NFPA 70 or your local electrical code: UPS Output Power 208V 230V 3750W 4200W Safety Warnings...
  • Page 10 S To reduce the risk of fire or electric shock, install this UPS in a temperature and humidity controlled, indoor environment, free of conductive contaminants. Ambient temperature must not exceed 40°C (104°F). Do not operate near water or excessive humidity (95% maximum). S Unpacking the cabinet in a low-temperature environment may cause condensation to occur in and on the cabinet.
  • Page 11 S Your rack kit has been approved only for the rack cabinet provided. It is your responsibility to ensure that installation of the equipment into any other rack complies with all applicable standards. Dell disclaims all liability and warranties with respect to combinations of equipment with any other rack.
  • Page 12: Installation

    Installation This chapter explains: S Equipment inspection S Unpacking the cabinet S UPS rear panels S UPS setup and installation, including the External Battery Module (EBM) S Remote Emergency Power-off (REPO) installation S Initial startup Inspecting the Equipment If any equipment has been damaged during shipment, keep the shipping cartons and packing materials for the carrier or place of purchase and file a claim for shipping damage.
  • Page 13: Unpacking The Cabinet

    Unpacking the Cabinet CAUTION: Unpacking the cabinet in a low-temperature environment may cause condensation to occur in and on the cabinet. Do not install the cabinet until the inside and outside of the cabinet are absolutely dry (hazard of electric shock). CAUTION: The cabinet is heavy (see page 62).
  • Page 14 With one person on each side, carefully lift the cabinet out of the outer carton using the handles on the cardboard and set it on a flat, stable surface (see Figure 3). Place the cabinet in a protected area that has adequate airflow and is free of humidity, flammable gas, and corrosion.
  • Page 15: Identifying The Ups Rear Panels

    Identifying the UPS Rear Panels This section shows the rear panels of the Dell Online Rack models. Two IEC 320-C19 and Two L6-20 Receptacles (Load Segment 2) RS-232 Port Communication Bay USB Port REPO Ports Output Circuit Breaker Ground Screw...
  • Page 16 REPO Ports Output Circuit Breaker Ground Screw Eight IEC 320-C13 Receptacles EBM Connector (Load Segment 1) Input Terminal Block Figure 5. 3750W, 230V Rear Panel One L6-30 Receptacles (Load Segment 2) RS-232 Port Communication Bay USB Port REPO Ports Output Circuit Breaker...
  • Page 17: Identifying The Ups Front Panel

    (Load Segment 2) Figure 7. 4200W, 230V Rear Panel Identifying the UPS Front Panel On/Off Button LCD Panel Scroll Button (Up or Back) Scroll Button (Down or Forward) Select Button Figure 8. The Dell Online Rack UPS Front Panel Installation...
  • Page 18: Rackmount Setup

    Rackmount Setup CAUTION: The cabinet is heavy (see page 62): 1) Dell strongly recommends to remove the battery tray from the UPS before lifting. 2) Lifting the cabinets into the rack requires a minimum of two people. CAUTION: Removing the batteries should be performed or supervised by personnel knowledgeable about batteries and the required precautions.
  • Page 19 Pull the battery trays out using the plastic tabs and remove the battery trays (see Figure 10). Figure 10. Removing the Battery Trays If installing additional UPSs, repeat Step 1 for each cabinet. NOTE: The instructions are the same for square-hole racks and unthreaded, round-hole racks. The rails fit both rack styles.
  • Page 20 Attach the rails to the rack: Engage the back end of the rail until it fully seats on the vertical rack flange and the hook latch locks in place (see Figure 11). Pull the rail toward the front. Push the front end of the rail until it fully seats on the vertical rack flange and the hook latch locks in place.
  • Page 21 Slide the cabinet into the rack (see Figure 12). Repeat for any additional cabinets. Figure 12. Installing the Cabinet Secure the front of the cabinet to the rack using the four thumbscrews on the mounting brackets (see Figure 13). Tighten by hand; do not use power tools. Repeat for any additional cabinets. Figure 13.
  • Page 22 Install the UPS battery trays (see Figure 14). Figure 14. Installing the Battery Trays Installation...
  • Page 23 Replace the battery retaining bracket (see Figure 15). Tighten the thumbscrew. Torque the screw to 0.7 Nm (6.2 lb in). NOTE: A small amount of arcing may occur when connecting the batteries. This is normal and does not damage the unit or present any safety concern. Connect the internal battery connectors and attach to the battery retaining bracket between the two studs.
  • Page 24: Installing The Ebm

    Install the UPS front cover (see Figure 16). Figure 16. Installing the UPS Front Cover Installing the EBM NOTE: A small amount of arcing may occur when connecting an EBM to the UPS. This is normal and will not harm personnel. Insert the EBM cable into the UPS battery connector quickly and firmly. To install the optional EBM: Plug the EBM cable into the UPS battery connector (see Figure 17).
  • Page 25: Installing The Ups

    Installing the UPS To install the UPS: If you plan to use Dell UPS Management Software, connect your computer to the USB port using the supplied cable. For more information about communication options, see page 54. If your rack has conductors for grounding or bonding of ungrounded metal parts, connect the ground cable (not supplied) to the ground bonding screw.
  • Page 26 CAUTION: To ensure the UPS stops supplying power to the load during any mode of operation, the input power must be disconnected from the UPS when the emergency power-off function is activated. NOTE: For Europe, the emergency switch requirements are detailed in Harmonized document HD-384-48 S1, “Electrical Installation of the Buildings, Part 4: Protection for Safety, Chapter 46: Isolation and Switching.”...
  • Page 27: Hardwiring The Ups Input

    The Dell Online Rack hardwired models require a dedicated branch circuit that meets the following requirements: S 250V/30A, 2-pole circuit breaker (25A for 3750W/230V UPS models) to provide short circuit and overcurrent protection S The protection device requires a two-pole disconnection device between the UPS output and the...
  • Page 28 Wall 2-pole Breaker Line AC Mains Neutral Figure 19. Circuit Breaker Diagram To hardwire the UPS input: Switch off utility power at the distribution point where the UPS will be connected. Be absolutely sure there is no power. Remove the terminal block cover (four screws) and retain. Figure 20.
  • Page 29: Ups Initial Startup

    Insert the conduit through the wiring access entry and attach the conduit fitting to the panel. Strip 0.5” (1.5 cm) of insulation from the end of each incoming wire. Connect the input and ground wires to the terminal block according to Figure 21 and Table 1. Figure 21.
  • Page 30 NOTE: The internal batteries charge to 90% capacity in less than 4 hours. However, Dell recommends that the batteries charge for 48 hours after installation or long-term storage. If an optional EBM is installed, see the recharge time listed in Table 14 on page 65.
  • Page 31: Operation

    Verify that the UPS power cord is plugged in. Switch on utility power where the UPS is connected. The UPS front panel display illuminates. The Dell startup screen changes to the UPS status summary screen. The UPS front panel display shows the Standby mode icon Press the button on the UPS front panel.
  • Page 32: Starting The Ups On Battery

    On the UPS status summary screen, press the button to check for active alarms or notices. Resolve any active alarms before continuing. See “Troubleshooting” on page 66. If there are no active alarms, a “No Active Alarms” message appears. Verify that the Normal mode icon appears on the UPS status summary screen, indicating that the UPS is operating normally and any loads are powered.
  • Page 33: Control Panel Functions

    When the UPS has a critical alarm, the backlight changes the text to dark amber and the background to amber. See Figure 22. Figure 22. Dell Online Rack UPS Control Panel There are three buttons on the control panel:...
  • Page 34: Changing The Language

    Startup Screen During startup, the Dell logo is the default screen. This startup screen displays for five seconds and then defaults to the UPS status summary screen. The display automatically returns to the UPS status summary screen when no button has been pushed for 15 minutes and no other screen has been locked by a user.
  • Page 35: Screen Locked

    Screen Locked To lock a screen, press the button. The current view stays locked and does not automatically return to the default screen after time-out. When the screen is locked, the image of a key appears on the UPS status summary screen just to the left of the status icon. See Figure 23. Pushing any button returns the normal button function, unlocks the screen, and removes the lock symbol.
  • Page 36 Table 3. Status Summary Screens Status Summary Screen Description UPS Critical Failure The UPS is in Fault mode. The status icon and background are flashing. Battery Mode The status icon and background of the icon are flashing. An audible alarm (0.5 seconds on/4.5 seconds off) accompanies the switch to Battery mode.
  • Page 37 Table 3. Status Summary Screens (continued) Status Summary Screen Description Battery Test Status The status when the UPS is performing a battery test. Normal Mode The UPS is operating in Normal mode from utility power. The UPS monitors and charges the batteries as needed and provides filtered power protection to your equipment.
  • Page 38: Event Log

    Table 4 describes the available battery status screens. Only one battery status is available at a time. Table 4. Battery Status Screens Battery Status Screen Description Battery charging Batteries are charged in constant current mode. Battery floating Batteries are charged in constant voltage mode. Battery resting Batteries are connected but are not being charged or discharged.
  • Page 39: Measurements

    Measurements The measurements screens provide useful measurement information on: S Output watts VA, current, power factor, voltage, and frequency S Input voltage and frequency S Battery voltage and percentage charged S Instantaneous Headroom Watts remaining S Peak Headroom Watts (the remaining watts available to support the load at peak demand, includes the date and timestamp of the peak demand) S Peak Consumption Watts (the peak power demand on the UPS, includes the date and timestamp of the peak demand)
  • Page 40: Control Screens

    Control Screens Table 5 describes the available control screens. Table 5. Control Screens Control Screens Description Go to Bypass Transfers the UPS system to internal Bypass mode. When the Go to Bypass command is issued, the screen immediately shows the message for five seconds: Manual Bypass Command.
  • Page 41: Identification

    S Type and model S Part number S Serial number S UPS firmware S Network Management Card (NMC) firmware NOTE: The NMC firmware screen displays only if the NMC is installed. See “Dell Network Management Card“ on page 56. Operation...
  • Page 42: Settings

    Settings Only available options are displayed. User settings are not protected by default. You can enable the password through the User Password setting. Table 6 displays the options that can be changed by the user. Table 6. Settings Description Available Settings Default Setting Change Language [English] [French] [German] [Spanish] [Japanese]...
  • Page 43 Table 6. Settings (continued) Description Available Settings Default Setting Overload Alarm Level [10%] [20%] [30%]...[100%] 100% If 100%, the UPS issues an Output Overload alarm at load > 100%. Output Overload Level 1 by default is set to NOTE: 100% and is configurable from 10% to 100% in 10% increments through the LCD setting menu.
  • Page 44 Table 6. Settings (continued) Description Available Settings Default Setting Bypass Voltage Low Limit [-6%] [-7%]...[-20%] of nominal -15% of nominal The Bypass operation is disabled if the measured bypass voltage level is below the nominal output voltage (-15%). The Qualify Bypass setting may overrule the NOTE: Bypass Voltage Low Limit setting.
  • Page 45 Table 6. Settings (continued) Description Available Settings Default Setting Unsynchronized Transfers [Enabled] [Disabled] Enabled If Enabled, unsynchronized transfers to the Bypass are allowed. If Disabled, unsynchronized transfers to the Bypass are not allowed. The Qualify Bypass setting may overrule the NOTE: Unsynchronized Transfers setting.
  • Page 46: Transferring The Ups Between Modes

    Table 6. Settings (continued) Description Available Settings Default Setting Reset Peak Headroom Watts [No] [Yes] If No, no action. If Yes, the Peak Headroom Watts value is cleared and the date and time stamp for this statistic is set to the current date and time. Clear Event Log —...
  • Page 47: Transferring From Bypass To Normal Mode

    Transferring from Bypass to Normal Mode To transfer from Bypass to Normal mode: Press the button for one second to go to the main menu selection and scroll down to the Control menu using the button. Press the button to enter the Control menu. Select Go to Normal.
  • Page 48: Retrieving The Event Log

    Retrieving the Event Log To retrieve the Event Log through the display: Press the button for one second to go to the main menu selection and scroll down to the Event Log menu using the button. Press the button to enter the Event Log list. Scroll through the listed events, notices, and alarms using either the button or the button.
  • Page 49: Configuring Load Segments

    Configuring Load Segments Load segments are sets of receptacles that can be controlled by the Dell UPS Management Software, the Dell Network Management Card, or through the LCD display, providing an orderly shutdown and startup of your equipment. For example, during a power outage, you can keep key pieces of equipment running while you turn off other equipment.
  • Page 50: Configuring Automatic Start Delay

    Configuring Automatic Start Delay You can configure the load segment to turn on automatically after the utility power returns, if it was shut down by: S The button S An external command with auto-restart option S Battery under voltage state S Automatic on battery shutdown command You can specify the restart delay time for each load segment: select zero seconds (0s is the default) to restart immediately, select 1–32767 seconds to delay for the specified time, or select Off.
  • Page 51: Configuring Automatic On Battery Shutdown

    Configuring Automatic on Battery Shutdown If set to Off (default), the load segment turns off only when commanded manually by the button, an external command, or through the display (Control > Load Segments). If set to zero seconds (0s), the load segment turns off automatically when the UPS on Battery state activates.
  • Page 52: Configuring Battery Settings

    Configuring Battery Settings Configure the UPS settings for an installed EBM, including whether to run automatic battery tests and automatic restart configuration. Configuring the UPS for an EBM If the UPS is not configured for the EBM, the UPS reports less battery time remaining on the UPS front panel and to any remote software.
  • Page 53: Running Automatic Battery Tests

    Running Automatic Battery Tests The automatic discharge test, enabled by default, runs during the transition from Float to Rest mode. After the test completes, the charge cycle restarts to completely charge the batteries and then continues to Rest mode normally. The automatic test runs approximately once every three months and does not run again until after three more Float to Rest mode transitions.
  • Page 54: Additional Ups Features

    Additional UPS Features This chapter describes: S Communication ports (RS-232 and USB) S Dell Network Management Card S Dell UPS Management Software RS-232 and USB Communication Ports To establish communication between the UPS and a computer, connect your computer to one of the UPS communication ports using an appropriate communication cable (RS-232 cable not supplied).
  • Page 55 Table 8. RS-232 Communication Port Pin Assignment Signal Name Function Direction from the UPS Unused — Transmit to external device Receive from external device Unused — Signal common (tied to chassis) — Unused — Unused — Unused — Unused — *Unused pins must be left free on all models.
  • Page 56: Dell Network Management Card (Optional)

    Dell Network Management Card (Optional) The Dell Online Rack UPS has one available communication bay, which supports the optional Dell Network Management Card. See Figure 25 for the location of the communication bay. It is not necessary to shut down the UPS before installing a communication card.
  • Page 57: Dell Ups Management Software

    It also gives you a complete record of critical power events, and it notifies you of important UPS or power information. If there is a power outage and the Dell Online Rack UPS battery power becomes low, the software can automatically shut down your computer system to protect your data before the UPS shutdown occurs.
  • Page 58: Ups Maintenance

    UPS Maintenance This chapter explains how to: S Care for the UPS and batteries S Transport the UPS S Store the UPS and batteries S Test the batteries S Update the UPS firmware UPS and Battery Care For the best preventive maintenance, keep the area around the UPS clean and dust‐free. If the atmosphere is very dusty, clean the outside of the system with a vacuum cleaner.
  • Page 59 Remove the UPS front cover (see Figure 26). Figure 26. Removing the UPS Front Cover Disconnect the internal battery connectors (see Figure 27). Figure 27. Disconnecting the Internal Battery Connector UPS Maintenance...
  • Page 60: Storing The Ups And Batteries

    Replace the UPS front cover (see Figure 28). Figure 28. Replacing the UPS Front Cover Storing the UPS and Batteries If you store the UPS for a long period, recharge the battery every 6 months by plugging the UPS into a power outlet.
  • Page 61: Testing Batteries

    The results display on the UPS front panel when complete. Updating the UPS Firmware To keep the UPS firmware updated with the latest improvements and benefits, visit for updates. You can download the latest firmware version and the instructions for installing it.
  • Page 62: Specifications

    S UPS block diagram Table 9. UPS Model List 208V Model 230V Models UPS Models 3750R OL (K804N), 3750W 3750R OL (H952N), 3750W 4700R OL (J730N), 4200W 4200R OL (K805N), 4200W 3750R and 4200R EBM (J739N), 192 Vdc/30A External Battery Module (EBM) Table 10.
  • Page 63 NOTE: This varies based on auto-detected input voltage or customer settings. Sine wave Voltage Waveform 3750W: (2) L6-20R; 20A 3750W:(8) IEC 320-C13; 10A for IEC, Output Receptacles (1) L6-30R, 30A 15A for UL (2) IEC 320-C19, 20A (2) IEC 320-C19, 16A for IEC, 20A for UL 4200W: (2) L6-20R;...
  • Page 64 Table 13. Environmental and Safety 208V Models 230V Models Up to 1,500 meters: 0°C to 40°C (32°F to 104°F); UL tested 25°C (77°F) Operating Temperature Above 1,500 meters: 0°C to 35°C (32°F to 95°F) Transit/Storage -15°C to 60°C (5°F to 140°F) Temperature Relative Humidity 0–95% noncondensing...
  • Page 65 4200W internal batteries: 5 minutes at full load/16 minutes at half load 3750W with one EBM attached: 14 minutes at full load/43 minutes at half load 4200W with one EBM attached: 11 minutes at full load/35 minutes at half load *Battery runtimes are approximate and vary depending on the load configuration and battery charge.
  • Page 66: Troubleshooting

    Troubleshooting The Dell Online Rack UPS is designed for durable, automatic operation and issues alarms to alert you whenever potential operating problems occur. Usually the alarms shown by the control panel do not mean that the output power is affected. Instead, they are preventive alarms intended to alert the user.
  • Page 67: Event Log Menu

    Event Log Menu From the Event Log menu, you can access the last 50 events, which includes events, notices, and alarms, arranged from newest to oldest. Events are silent conditions that are recorded in the Event Log as status information, such as “Clock Set Done.”...
  • Page 68 Table 15. Typical Alarms and Conditions (continued) Alarm or Condition Possible Cause Action Battery test did not run or One of the conditions listed in Resolve the condition, then restart the test. was interrupted. “Running Automatic Battery Tests” on page 53 was not present.
  • Page 69 Battery Test Failed A weak battery string was This is a warning notice. Dell recommends detected during the last battery that you replace the batteries soon. (Alarm 191) test. Intermittent Alarm...
  • Page 70 Table 15. Typical Alarms and Conditions (continued) Alarm or Condition Possible Cause Action Output Overload The load level is at or has The UPS can support the load indefinitely at exceeded the configurable this load level. (Alarm 25) threshold limit for a Level 1 The alarm clears when the load drops below Continuous Alarm Overload condition.
  • Page 71: Silencing The Alarm

    Table 15. Typical Alarms and Conditions (continued) Alarm or Condition Possible Cause Action DC Link Over Voltage The link or rail voltage has The UPS transfers to Bypass mode if exceeded its upper threshold supporting the load. (Alarm 28) limit. Continuous Alarm DC Link Under Voltage The link or rail voltage has...

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