Dell 3750W Operating instructions

Dell UPS Site Preparation Guide, EMEA (230V) Revision 1, February 2012
Dell UPS Site Preparation Guide, EMEA.
Applies Dell Rackmount UPS Models, 3750W, 4200W & 5600W
Note: This document is for guidance only. Actual installation instructions and safety cautions are included within the UPS User
Guide.
Site Preparation Checklist
Installation site meets minimum environmental requirements.
Ensured all required accessories have been ordered with the UPS
Electrical Preparation
Required electrical supply is available.
Scheduled an electrician to install the Dell UPS.
Provided a copy of this preparation guide to the electrician.
Made electrician aware of the electrician’s checklist in the User Manual.

Dell UPS Site Preparation Guide, EMEA (230V) Revision 1, February 2012
Site Preparation:
Physical Requirements for the Dell UPS
UPS Model
UPS Technology
Dimensions (mm, W x D x H)
Weight (installed, no battery)
3750W Rack
Online
4U, 438 x 790 x 171.5
65kg, 23kg
4200W Rack
Online
4U, 438 x 790 x 171.5
65kg, 23kg
5600W Rack
Line-Interactive
4U, 438 x 790 x 171.5
72kg, 24kg
5600W Rack
Online
4U, 438 x 790 x 171.5
64kg, 24kg
EBM* for 3750W/4200W UPS
n/a
3U, 438 x 735 x 127
61kg, n/a
EBM* for all 5600W UPS
n/a
4U, 438 x 735 x 171.5
66kg, n/a
* EBM is an optional ‘external battery module’.
Environmental Requirements for the Dell UPS
Environmental Condition
Suitable Range
Temperature (Operation)
0 - 40C (32 - 104F)
Temperature (Storage, 24hr)
-15 - 60C (5 - 140F)
Temperature (Long-term Storage)
- 15 - 45C (5 - 113F)
Relative Humidity
0 - 95% (non-condensing)
Elevation (Operation)
0-3048m (0 - 10,000ft)
Elevation (Storage)
0 - 15,340m (0 - 50,000ft)
Heat Output for the Dell UPS
UPS Model
UPS Technology
Heat Loss, Watts / BTU (normal mode)
Heat Loss, Watts / BTU (battery mode)
3750W Rack
Online
188 / 640
375 / 1281
4200W Rack
Online
210 / 717
420 / 1434
5600W Rack
Line-Interactive
280 / 956
560 / 1921
5600W Rack
Online
390 / 989
420 / 1433
Optional accessories for Dell UPS
Optional Accessory
Importance
Purpose & Use
External Battery Module
Optional
Increases the battery runtime (autonomy) by approximately 3 times
Network Management Card
Recommended
Improves communication with >1 server and is mandatory for
virtualization
Environmental Monitoring Probe
Recommended
Measures rack temperature and humidity (plus 2 x relay contacts).
Requires network management card. Data rolls up into UPS Management
software.
32A, 3m Electrical Input Cord
Highly Recommended
UPS input cable pack providing a 3m cord with IEC309 32A Commando
plug. Also includes plastic stuffing gland (strain relief).

Dell UPS Site Preparation Guide, EMEA (230V) Revision 1, February 2012
Electrical Preparation:
Electrical Requirements for the Dell UPS
UPS Model
UPS Technology
Input Voltage (VAC)
Power Draw
(standby)
Overcurrent
Protection
Minimum Wire Size
(LiveNeutral/Ground)
3750W Rack
Online
208, 220, 230, 240
186W
25A 1-phase
10 / 10 AWG
4200W Rack
Online
208, 220, 230, 240
210W
30A 1-phase
10 / 10 AWG
5600W Rack
Line-Interactive
208, 220, 230, 240
224W
32A 1-phase
10 / 10 AWG
5600W Rack
Online
208, 220, 230, 240
143W
32A 1-phase
8 / 10 AWG
Note: Overcurrent protection should be ‘slow-break’, suitable for devices with a high inrush current. Normally this should be a fuse or
circuit breaker with a Type-C or Type-3 rating.
Electrical Requirements for the REPO Switch (Remote Emergency Power Off)
REPO is used to shut down the UPS from a distance. For example, this feature can be used for shutting down the
load and the UPS by thermal relay, in the event of room over-temperature. When REPO is activated, the UPS shuts
down the output and all its power converters immediately. The UPS logic power remains on to issue an alarm.
The REPO feature shuts down the protected equipment immediately and does not follow the orderly shutdown
procedure initiated by any power management software. Any devices that are operating on battery power are also
shut down immediately. When the REPO switch is reset, the equipment will not return to utility or battery power
until the UPS is manually restarted.
There are two REPO ports on each UPS in order to support cascaded REPO functionality. This allows a single cable to
be cascaded between multiple Dell UPS, eliminating the need for a dedicated REPO cable for each UPS & simplifying
installation.
The REPO contacts are normally open.
Wire Function
Terminal Wire Size Rating
Suggested Wire Size
Remote Emergency Power Off (REPO)
4-0.32mm2(12-22 AWG)
0.82mm2(18 AWG)
WARNING: The REPO circuit is an IEC 60950 safety extra low voltage (SELV) circuit. This circuit must be separated from any
hazardous voltage circuits by reinforced insulation.
CAUTION: The REPO must not be connected to any utility connected circuits. Reinforced insulation to the utility is required. The
REPO switch must have a minimum rating of 24Vdc and 20 mA and be a dedicated latching-type switch not tied into any other
circuit. The REPO signal must remain active for at least 250ms for proper operation.
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.”
NOTE: The pins must be open to keep the UPS running. If the UPS shuts down because the REPO connector pins are shorted,
restart the UPS by re-opening the REPO connector pins and turning on the UPS manually.
Maximum resistance in the shorted loop is 10 ohm.
NOTE: Always test the REPO function before applying your critical load to avoid accidental load loss.

Dell UPS Site Preparation Guide, EMEA (230V) Revision 1, February 2012
Electrical Wiring, Basic Installation Schematics
Basic Installation Schematic of Dell UPS using optional power input cord.
Suitable for all models except 5600W Online
Basic Installation Schematic of Dell UPS, hardwired to overcurrent protection device
Suitable for all models including 5600W Online

Dell UPS Site Preparation Guide, EMEA (230V) Revision 1, February 2012
Overcurrent Protection Devices:
All Dell UPS Rack Mount Models (except 5600W Online):
In all cases the installation should include a dedicated electrical branch circuit with a 2-pole overcurrent protection
device. The breaker should be wall-mounted and accessible to the operator.
5600W Online UPS only:
The 5600W online UPS does not have an automatic protection device against current backfeed. Dell recommends
installing an external isolating device (see illustration below). After the device is installed, you must add a warning
label with the following wording or the equivalent on the external AC contactor:
“RISK OF VOLTAGE BACKFEED. Isolate the UPS before operating on this circuit, then check for hazardous voltage between all
terminals.”
The following table lists AC contactors that can be used as backfeed protection devices.
Manufacturer
Type
Rating
Moeller GMBH
DILM(C)32-10
600 V, 40A
Tianshui Electrical Aparatus Co. Ltd (E203071)
GSC1(CJX4-d)-4011
220-240 Vac, 42 FLA
LS Industrial Systems Co., Ltd. (E108780)
GMC(D)-32
600 Vac, 45A

Dell UPS Site Preparation Guide, EMEA (230V) Revision 1, February 2012
Optional 32A 1phase, 3m, UPS Input Cord Kit
If you ordered the optional 32A input cord kit, refer to the below drawings for advice on fitting the cable:
Step 1: Remove the cover-plate from the rear of the UPS
to access rear-plate terminals and cable access port
Step 2: Remove the back (side nearest cable bare ends)
of the plastic stuffing gland from the input cord kit
Step 3: Thread the input cord through the UPS back-
plate and secure with the plastic stuffing gland. Ensure
you leave enough free cord to connect to the UPS
terminals.
Step 4: Secure the bare cable ends to the UPS terminals
& replace the cover-plate.
Wire Colour
Terminal Position
UPS Wire Function
Terminal Wire Size Rating
Tightening Torque
Grey/Yellow Stripe
G
Input Ground
5.26-16mm2
(10-6AWG)
2.26Nm
(20 lb in)
Blue
N
Neutral In
Brown
L
Line (Live) In

Dell UPS Site Preparation Guide, EMEA (230V) Revision 1, February 2012
Receiving the Dell UPS
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.
Unpacking the Dell UPS
Remove all parts before beginning the installation. For a complete list of “what’s in the box” either refer to the user
guide or visit www.dellups.com -> Configure UPS –> List All UPS -> Your model.
Note that for some Dell UPS models the rack-mount rails may be packed below the UPS in the box.
CAUTION: Refer to the user guide for complete instructions including important Health & Safety advice.
CAUTION: This equipment is heavy; refer to the user guide for advice on unpacking and safe installation.
Installing the Dell UPS into the rack:
Install the ReadyRails followed by the UPS chassis. Finally install the battery modules into the UPS chassis & connect
the DC leads. Finish by installing the UPS front panel.
Install the optional external battery module (EBM), Network Management Card (NMC), Environmental Monitoring
Probe (EMP) and PDU(s), if ordered.
Note: The Dell UPS equipment is heavy. Refer to the user guide for complete guidance on safety. Some key points
are:
You should typically place the UPS at the bottom of the rack for a lower centre of gravity
Extend the rack stabilization feed during installation to prevent the rack tipping
Ensure you follow health & safety recommendations for working with heavy & electrical equipment

Dell UPS Site Preparation Guide, EMEA (230V) Revision 1, February 2012