LEGRAND Daker DK 4.5-6 kVA User manual

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Part. LE08927AA-09/15-01 GF
Daker DK 4.5-10 kVA
Parallel installation quick start

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ENGLISH 3
UK
Daker DK 4.5-10 kVA
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Daker DK 4.5-10 kVA
Index
Introduction 2
1 Important Safety Instructions 2
2 Parallel system installation 3
3 Single Unit Check 5
4 Parallel Setting 7
4 Parallel Mode Start up 8
5 Trouble Shooting 9

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Introduction
1 Important Safety Instructions
This document is a reference guide to install the Daker DK UPS 4,5-10kVA in parallel for N+1
redundancy operation. The parallel installation and configuration procedure is divided in 4 phases :
Parallel system installation – To physically connect each unit.
Single Unit check – To verify and confirm that each unit works properly with the correct
parameters and output voltage
Parallel Setting – To setup each units’ parameters to work in parallel mode.
Parallel Mode Start up – To verify that the parallel system works normally.
• Only qualified and trained electricians are allowed to install the UPSs in single unit or parallel
systems.
• Please read the Installation guide carefully before installing these UPSs to avoid electrical
hazards or damages to the UPS and the loads connected.
• To prevent potential leakage current hazard, ensure that the AC main supply is securely grounded.
• Please note that the Parallel function of the UPS can be enabled only in“Normal Mode”operation.
• Before to set a parallel installation, ensure that the output voltage tolerance for each UPS at
zero-load condition is less than 0.5Vac.Please consult your authorized dealer if any of the UPS
output voltage has the tolerance over 0.5Vac.
• Ensure that the communication cables plugged into the UPS RJ45 connectors are connected
securely to avoid damage to both the UPS and the output devices.
• Ensure that two and only two UPS units of the parallel system have the terminal resistors on the
rear set in “On” position.
• Only UPS with the same rating and type can be installed in parallel.
• Please ensure to add a 40Arms/250Vac and 30Arms/250Vac NFB(Non-fuse Breaker)at the input
and output of each UPS respectively.

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Daker DK 4.5-10 kVA
2 Parallel system installation
ACCESSORIES DESCRIPTION QUANTITIES
2 UPS 3 UPS 4 UPS
C1
Standard cat5 cable
with Rj45 connector
(max length: 1050mm)
x 1 x 2 x 3
C2
Standard cat5 cable
with Rj45 connector
(max length: 1900)
x 1
F1 Bracket to secure
C1 and C2 to the UPS box x 2 x 3 x 4
Accessories
The following accessories (included in the parallel kit) are requested to install the UPS in parallel mode.
• The design of the air flow for the convertible UPS is to flow in from the front ventilation holes
to the rear ventilation holes.
It is recommended to leave at least 30 cm around the UPS and Battery bank to allow good
ventilation conditions.
Please refer to the UPS manual for the detailed installation guide.
• To reduce noise interference do not cross or mix input , output, and battery cables.
• Please install the communication wires for parallel and control signal functions (including
cat5, serial, usb and EPO cables) keeping them away from input/output and battery cables.
• To prevent potential leakage current hazard, ensure that the AC main supply is securely
grounded.
• Please refer to the single UPS input/output current specifications and recommended conduc-
tors listed below:
AC input and output
MODEL MAXIMUM CURRENT CONDUCTOR SECTION
4,5-6KVA 33A AWG #9
10KVA 54,3A AWG #7
Battery Input
MODEL MAXIMUM CURRENT CONDUCTOR SECTION
4,5-6KVA 25A AWG #10
10KVA 41A AWG #10

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Recommended Circuit Breakers to be installed at the UPS input/output
MODEL INPUT CBi OUTPUT CBo
4,5-6KVA 40A 30A
10KVA 63A 63A
The breaker type should be “C” or “D” with the following current ratings:
• Install and connect the UPS units according to the diagrams in figure 2, 3, 4, 5.
CAUTION
The MTBS is an optional for maintenance.
2 Parallel system installation
CBi : installation input breakers
CBo : installation output breakers
CB1 : UPS utility input breaker
Utility input
UPS output
Figure 1

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Daker DK 4.5-10 kVA
1050mm RJ-45
communication
connecting wire
1900mm RJ-45
communication
connecting wire
Max. 25M; all Input
Power cables shall
be with the same
lenght
Figure 2 Figure 3
Figure 4
1900mm RJ-45
communication
connecting wire
• Connect the parallel CAT5E cables as a “Ring Network” (Figure 3) using the parallel kit plate to
fix them to the UPS rear panel (Figure 4)
2 units parallel
3 units parallel
4 units parallel
CAUTION
The maximum length of the communication connecting wires shall be less than 7M.
All the Input/ output power cable should have the same length (max 25m)

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Parameters Check
CAUTION
The following operations have to be done on each UPS separately and independently.
• Ensure that all the circuit breakers at the input (Cbi) and output (Cbo) are set to off position.
• Ensure that all the utility input breakers (CB1) for each UPS is set to off position
• Turn on the AC input of the UPS to be checked :
Turn on only the input breaker CBi connected to the UPS to be checked, and the utility breakers
CB1 on the rear panel of the UPS itself. DO NOT TURN ON THE INVERTER !
Figure 5
• Enter in setting mode by pressing <On> & < > keys simultaneously for 3 seconds (Figure 6).
• Verify that all the UPS’s parameters match with the default values (Table 1)
3 Single Unit Check

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Daker DK 4.5-10 kVA
Item
Press < >
to change
Display List
Default Press < > to change
Buzzer on/off
Self-Test
(Available in Line-Mode Only)
Bypass Voltage
Range
Inverter Synchronize
Frequency range
Inverter
Output Voltage *
Operation Mode
Output Voltage
Adjustment
Parallel ID
Number **
Parallel Function
On/Off ***
SAVE Press < > to Save
After Saved
UPS Locked Shut off AC input power to reset the UPS
Table 1
** Single unit ID number must be “01”, or UPS will have an Er17 error occurred.
*** Single unit Parallel function must be “OFF” (P 01), or UPS will have an Er21 error occurred.

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3 Single Unit Check
CAUTION
“Bypass Voltage Range”, “Inverter Synchronize Frequency Range”, “Inverter Output Voltage”
and“Output Voltage Adjustment“ are adjustable parameters but for parallel function eve-
ry unit must have the same settings
• Change item by pressing < > until the display shows the text “Save”. Press < Enter > to save the
setting.
• Turn off the UPS utility input breaker (CB1) while the LCD shows “LINE OFF” to reset the UPS.
Basic Function Check
• Turn on the AC input (UPS utility input breaker) and then turn on the UPS inverter (press <ON>)
• Test the UPS switching from normal mode to stored energy mode and viceversa
• Verify that the LCD panel works normally and doesn’t display errors.
Output Error Voltages Check
• Verify the output voltage for each UPS unit (at 0 load), and make sure the voltage difference
between each unit is under 0.5Vac.
• If the voltage difference is between 0.5~1.0Vac, the parallel error current will be higher.
• If the voltage difference is over 1.0Vac, a calibration should be performed on the unit(s) which
has over-limit error voltage otherwise the parallel could fail (If this condition occurs please con-
tact your local dealer for technical support)
Turn off the inverter (press <off>) and then the AC input (Turn off CBi and the UPS utility input
breaker) and restart the process for the next unit.