Dell 3750W User manual

DelltOnline 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

Notes and Warnings
NOTE: A NOTE indicates important information that helps you make better use of your software.
DANGER: A DANGER indicates an imminently hazardous situation which, if not avoided, will result in death or
serious injury.
WARNING: A WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or
injury.
CAUTION: A CAUTION indicates a potentially hazardous situation which, if not avoided, may result in minor or
moderate injury or in property damage incidents.
DANGER: Observe the following instruction to help prevent an imminently hazardous situation which, if not
avoided, will result in death or serious injury:
SThis UPS contains LETHAL VOLTAGES. All repairs and service should be performed by
AUTHORIZED SERVICE PERSONNEL ONLY. There are NO USER SERVICEABLE PARTS
inside the UPS.
Information in this document is subject to change without notice.
E2009 Dell Inc. All rights reserved.
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.
Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their
products. Dell Inc. disclaims any proprietary interest in trademarks and trade names other than its own.
September 2009 • 164201789 4

3
Table of Contents |
Table of Contents
1 Introduction
Finding Information 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Safety Warnings
3 Installation
Inspecting the Equipment 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unpacking the Cabinet 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Identifying the UPS Rear Panels 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Identifying the UPS Front Panel 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rackmount Setup 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing the EBM 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing the UPS 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing Remote Emergency Power-off 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hardwiring the UPS Input 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
UPS Initial Startup 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 Operation
UPS Startup and Shutdown 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Starting the UPS 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Starting the UPS on Battery 32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
UPS Shutdown 32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Control Panel Functions 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Changing the Language 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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|Table of Contents
Display Functions 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Startup Screen 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Screen Locked 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
UPS Status 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Event Log 38. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Measurements 39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Control Screens 40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Identification 41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Settings 42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transferring the UPS Between Modes 46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transferring from Normal to Bypass Mode 46. . . . . . . . . . . . . . . . . . . . . . . . . .
Transferring from Bypass to Normal Mode 47. . . . . . . . . . . . . . . . . . . . . . . . . .
Setting Power Strategy 47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Retrieving the Event Log 48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Behavior on Overload 48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Configuring Load Segments 49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Controlling Load Segments Through the Display 49. . . . . . . . . . . . . . . . . . . . .
Configuring Automatic Start Delay 50. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Configuring Automatic on Battery Shutdown 51. . . . . . . . . . . . . . . . . . . . . . . .
Configuring Battery Settings 52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Configuring the UPS for an EBM 52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Running Automatic Battery Tests 53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Configuring Automatic Battery Tests 53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Configuring Automatic Restart 53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 Additional UPS Features
RS-232 and USB Communication Ports 54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dell Network Management Card (Optional) 56. . . . . . . . . . . . . . . . . . . . . . . . .
Dell UPS Management Software 57. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5
Table of Contents |
6 UPS Maintenance
UPS and Battery Care 58. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transporting the UPS 58. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storing the UPS and Batteries 60. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
When to Replace Batteries 60. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Testing Batteries 61. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Updating the UPS Firmware 61. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7 Specifications
8 Troubleshooting
Accessing Alarms and Conditions 66. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
UPS Status Menu 66. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Event Log Menu 67. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Typical Alarms and Conditions 67. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Silencing the Alarm 71. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6
|Introduction
Introduction
The DelltOnline Rack uninterruptible power system (UPS) protects your sensitive electronic
equipment from basic power problems such as power failures, power sags, power surges, brownouts, and
line noise.
Power outages can occur when you least expect them and power quality can be erratic. These power
problems have the potential to corrupt critical data, destroy unsaved work sessions, and damage
hardware — 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.
Figure 1 shows the Dell Online Rack UPS.
Figure 1. The Dell Online Rack UPS
1

7
Introduction |
Providing outstanding performance and reliability, the UPS's unique benefits include:
SOnline UPS design with pure sine wave output. The UPS filters and regulates incoming AC power
and provides consistent power to your equipment without draining the battery.
STrue online double-conversion technology with high power density, utility frequency
independence, and generator compatibility.
SSelectable High Efficiency mode of operation.
S4U size that fits any standard 48 cm (19”) rack.
SStart‐on‐battery capability for powering up the UPS even if utility power is not available.
SMaintenance is simplified by allowing the safe replacement of batteries without powering down the
UPS.
SExtended runtime with an optional External Battery Module (EBM).
SEmergency shutdown control through the Remote Emergency Power-off (REPO) ports.
STwo standard communication ports (USB and DB-9 serial port).
SOptional Dell Network Management Card with enhanced communication capabilities for
increased power protection and control.
SAdvanced power management with the Dell UPS Management Software for graceful shutdowns
and power monitoring.
SSequential shutdown and load management through separate receptacle groups called load
segments.
SFirmware that is easily upgradable without a service call.
SBacked by worldwide agency approvals.

8
|Introduction
Finding Information
CAUTION: The Safety, Environmental, and Regulatory Information document provides important safety and
regulatory information.
What are You Looking For? Find It Here
SThe user's guide for my UPS
SThe user's guide for the Dell Network Management
Card
SDell UPS Management Software
NOTE: Documentation and software updates can be
found at support.dell.com.
Dell UPS Disc
SSpecifications
SHow to configure UPS settings
SHow to troubleshoot and solve problems
SHow to install REPO control
Dell UPS User's Guide
The user's guide is available on the Dell UPS disc and
on support.dell.com.
SSafety instructions
SRegulatory information
SRecycling information
Safety, Environmental, and Regulatory Information
SWarranty information
STerms and Conditions (U.S. only)
SEnd User License Agreement
Dell Warranty and Support Information
SSupport information Dell Support Website — support.dell.com
NOTE: Select your region or business segment to view
the appropriate support site.

9
Safety Warnings |
Safety Warnings
CAUTION: Before performing the procedures in this document, read and follow the safety instructions and
important regulatory information in your Safety, Environmental, and Regulatory Information document.
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
This manual contains important instructions that you should follow during installation and
maintenance of the UPS and batteries. Please read all instructions before operating the equipment and
save this manual for future reference.
DANGER: Observe the following instruction to help prevent an imminently hazardous situation which, if not
avoided, will result in death or serious injury:
SThis UPS contains LETHAL VOLTAGES. All repairs and service should be performed by
AUTHORIZED SERVICE PERSONNEL ONLY. There are NO USER SERVICEABLE
PARTS inside the UPS.
WARNING: Observe the following instructions to help prevent a potentially hazardous situation which, if not
avoided, could result in death or injury:
SOnly qualified service personnel (such as a licensed electrician) shall perform the electrical
installation. Risk of electrical shock.
SFor UPS models with hardwired input, overcurrent protection for the output AC circuit(s) is to be
provided by others.
SFor UPS models with hardwired input, suitably rated disconnect switches for the output AC
circuit(s) are to be provided by others.
SOutput overcurrent protection and disconnect switch must be provided by others.
SThis UPS contains its own energy source (batteries). The output receptacles may carry live voltage
even when the UPS is not connected to an AC supply.
SDo not remove or unplug the input cord when the UPS is turned on. This removes the safety
ground from the UPS and the equipment connected to the UPS.
STo 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 30A 25A
4200W 30A 30A
2

10
|Safety Warnings
STo 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).
SUnpacking 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).
SIf the UPS requires any type of transportation, disconnect the internal UPS batteries before
transporting (see page 58).
CAUTION: Observe the following instructions to help prevent a potentially hazardous situation which, if not
avoided, may result in minor or moderate injury or in property damage incidents:
SFor PLUGABLE EQUIPMENT, the power outlet shall be installed near the equipment and shall
be easily accessible.
SServicing of batteries should be performed or supervised by personnel knowledgeable about
batteries and the required precautions. Keep unauthorized personnel away from batteries.
SBatteries can present a risk of electrical shock or burn from high short-circuit current. The
following precautions should be observed: 1) Remove watches, rings, or other metal objects; 2) Use
tools with insulated handles; 3) Wear rubber gloves and boots; 4) Do not lay tools or metal parts on
top of batteries; 5) Disconnect the charging source prior to connecting or disconnecting battery
terminals.
SDetermine if the battery is inadvertently grounded. If inadvertently grounded, remove the utility
source from the ground. Contact with any part of a grounded battery can result in electrical shock.
The likelihood of such shock can be reduced if such grounds are removed during installation and
maintenance (applicable to equipment and remote battery supplies not having a grounded supply
circuit).
SELECTRIC ENERGY HAZARD. Do not attempt to alter any battery wiring or connectors.
Attempting to alter wiring can cause injury.
SReplace batteries with the same number and type of batteries as originally installed in the UPS.
SProper disposal of batteries is required. Refer to your local codes for disposal requirements.
SNever dispose of batteries in a fire. Batteries may explode when exposed to flame.
SDo not open or mutilate the battery or batteries. Released electrolyte is harmful to the skin and
eyes and may be extremely toxic.
SThe UPS may be connected to a maximum of one External Battery Module (EBM).

11
Safety Warnings |
WARNING: Additional instructions for Rack-Mounted Systems
SYour 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.
SBefore installing your equipment in a rack, install all front and side stabilizers. Failure to install
stabilizers can allow the rack to tip over.
SAlways load from the bottom up, and load the heaviest items first.
SDo not overload the AC power supply branch circuit that provides power to the rack.
SDo not stand or step on any components in the rack.
WARNING: Slide/rail mounted equipment is not to be used as a shelf or work space.
Do not add weight to slide/rail mounted equipment.

12
|Installation
Installation
This chapter explains:
SEquipment inspection
SUnpacking the cabinet
SUPS rear panels
SUPS setup and installation, including the External Battery Module (EBM)
SRemote Emergency Power-off (REPO) installation
SInitial 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. If you discover damage after
acceptance, file a claim for concealed damage.
To file a claim for shipping damage or concealed damage: 1) File with the carrier within 15 days of
receipt of the equipment; 2) Send a copy of the damage claim within 15 days to your service
representative.
NOTE: Check the battery recharge date on the shipping carton label. If the date has passed and the batteries
were never recharged, do not use the UPS. Contact your service representative.
3

13
Installation |
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). Use caution to unpack and move the cabinet.
Use care when moving and opening the carton. Leave the components packaged until ready to install.
To unpack the system:
1Open the outer carton and remove the accessories packaged with the cabinet (see Figure 2).
Figure 2. Unpacking the Cabinet

14
|Installation
2With 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.
Figure 3. Lifting the Cabinet
3Discard or recycle the packaging in a responsible manner, or store it for future use.

15
Installation |
Identifying the UPS Rear Panels
This section shows the rear panels of the Dell Online Rack models.
UPS
Communication Bay
2m, L6-30P Power Cord
USB Port
One L6-30 Receptacle
(Load Segment 1)
REPO Ports
RS-232 Port
Ground Screw
Two IEC 320-C19 and Two L6-20 Receptacles
(Load Segment 2)
EBM Connector
Output Circuit Breaker
Figure 4. 3750W, 208V Rear Panel

16
|Installation
UPS
Communication Bay
Input Terminal Block
USB Port
Eight IEC 320-C13 Receptacles
(Load Segment 1)
REPO Ports
RS-232 Port
Ground Screw
Two IEC 320-C19 Receptacles
(Load Segment 2)
EBM Connector
Output Circuit Breaker
Figure 5. 3750W, 230V Rear Panel
UPS
Communication Bay
Input Terminal Block
USB Port
Four IEC 320-C19 and
Two L6-20 Receptacles
(Load Segment 1)
REPO Ports
RS-232 Port
Ground Screw
One L6-30 Receptacles
(Load Segment 2)
EBM Connector
Output Circuit Breaker
Figure 6. 4200W, 208V Rear Panel

17
Installation |
UPS
Communication Bay
Input Terminal Block
USB Port
Six IEC 320-C13 Receptacles
(Load Segment 2)
REPO Ports
RS-232 Port
Ground Screw
Four IEC 320-C19 Receptacles
(Load Segment 1)
EBM Connector
Output Circuit Breaker
Figure 7. 4200W, 230V Rear Panel
Identifying the UPS Front Panel
On/Off Button LCD Panel
Scroll Button (Down or Forward)
Select Button
Scroll Button (Up or Back)
Figure 8. The Dell Online Rack UPS Front Panel

18
|Installation
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. Keep unauthorized personnel away from batteries.
CAUTION: If installing an optional EBM, install the EBM directly below the UPS.
NOTE: Mounting rails are required for each individual cabinet.
To install the UPS and optional EBM in a rack:
1Remove the internal battery trays from the UPS:
Loosen the thumbscrew on the battery retaining bracket and remove (see Figure 9).
Figure 9. Removing the Battery Retaining Bracket

19
Installation |
Pull the battery trays out using the plastic tabs and remove the battery trays (see Figure 10).
Figure 10. Removing the Battery Trays
2If 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. The square-hole rack is shown in the illustrations.
3Select the proper holes in the rail for positioning the cabinet in the desired location in the rack.
The rails should be located at the bottom of the 4U space allocated for the UPS or 3U for the
EBM.
4Position the end of the left and right rails labeled FRONT facing inward.

20
|Installation
5Attach 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.
Figure 11. Installing the Rails