Unipower SLI 15 Installation instructions

SLI15 INVERTERS
Installation & Operating Manual
www.unipowerco.com
Document Number: SLI-15-5 © 2018 UNIPOWER LLC
All Rights Reserved
sli15-man-rev5-0718.indd
UNIPOWER LLC • 3900 Coral Ridge Drive, Coral Springs, Florida 33065, USA • [e-mail]
North America: [phone] • Europe: [phone]
POWERING TECHNOLOGY

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Manual No. sli-15-5 sli15-man-rev5-0718.indd
Copyright © 1999-2016 UNIPOWER LLC
All Rights Reserved
Restricted Rights Legend:
Use, duplication, or disclosure by the Government is subject to restrictions as set forth in
subparagraph © (1)(ii) of the Rights in Technical Data and Computer Software clause at DFARS
252.227-7013 or subparagraphs © (1) and (2) of Commercial Computer Software - Restricted
Rights at 48 CFR 52.227-19, as applicable.
For Contact Information, please go to https://www.unipowerco.com/contact/
Refer to the UNIPOWER License Agreement in this package before installing or using this product.
Unless specically noted, all addresses, data characters and persons referenced herein, and all
examples involving names of companies and products, are ctitious examples and are designed
solely to illustrate the use of UNIPOWER products.
Product names, logos, brands, and other trademarks featured or referred to within this product
manual are the property of their respective trademark holders. These trademark holders are not
aliated with UNIPOWER LLC or our products. They do not sponsor or endorse our products.
LIMITATIONS AND AUTHORIZATIONS FOR USE AND PERMITTED APPLICATIONS
UNIPOWER’s products are not designed, intended for use in, or authorized for use as critical
components in, human life support systems/equipment, equipment used in hazardous environments,
or equipment used in nuclear control equipment or systems. Any such use requires the prior
express written consent of an authorized executive ocer of UNIPOWER LLC, which consent
may be withheld by UNIPOWER LLC in its sole discretion. Users assume all risk and liability for,
and agree to indemnify and defend UNIPOWER from and against any claims for personal injury
(including death) or property damage resulting from any such use or application which is made in
the absence of such prior express written consent.
If you nd errors or problems with this documentation, please notify UNIPOWER. UNIPOWER
does not guarantee that this document is error-free. The information in this document is subject to
change without notice.

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Manual No. sli-15-5 sli15-man-rev5-0718.indd
Contents
Chapter 1 General Information....................................................................................................5
1.1 General 5
1.2 Feedback & Support ..................................................................................................................6
1.3 Disclaimer6
Chapter 2 Location Selection........................................................................................................7
Chapter 3 Instructions...................................................................................................................8
3.1 Package Inspection.....................................................................................................................8
3.2 Equipment Inspection ................................................................................................................8
3.3 Handling 8
3.4 Identication Label ....................................................................................................................9
3.5 Initial Settings ............................................................................................................................9
Chapter 4 Mounting Procedure..................................................................................................10
4.1 Rack mounting types................................................................................................................10
4.2 Connections..............................................................................................................................11
4.3 Step by Step procedure to turn on the unit...............................................................................20
Chapter 5 “User Guide” ..............................................................................................................27
5.1 The Display ..............................................................................................................................27
5.2 Startup sequence and the Standby Status.................................................................................28
5.3 Operating Modes......................................................................................................................29
5.4 Controller status.......................................................................................................................30
5.5 Main menus..............................................................................................................................30
5.6 The SETTINGS menu..............................................................................................................31
Appendix A Input Power Requirements and DC Input Wire Sizing....................................43
Appendix B Manual Bypass .....................................................................................................44
Appendix C Grounding Restrictions Summary .....................................................................46
Appendix D The SERVICE menu............................................................................................47
Appendix E Default Factory Settings ......................................................................................49
Appendix F Error State Behavior............................................................................................50
Appendix G SLI15 to ACX Translator ....................................................................................51

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Manual No. sli-15-5 sli15-man-rev5-0718.indd
FIGURES
Figure 1-1 Input Current Absorption .............................................................................................................5
Figure 1-2 Input Breaker Delay .....................................................................................................................6
Figure 4-1 Fitting Mounting Brackets .........................................................................................................10
Figure 4-2 Mounting Dimensions................................................................................................................11
Figure 4-3 Rear View...................................................................................................................................11
Figure 4-4 Input Connection Bus Bars ........................................................................................................11
Figure 4-5 DC Input Clips in sub-rack ........................................................................................................12
Figure 4-6 Plug Connections .......................................................................................................................12
Figure 4-7 Screw Terminal Connections .....................................................................................................12
Figure 4-8 AC Output Connections for n-inverters in parallel conguration - plug connectors .................13
Figure 4-9 AC Output Connections for n-inverters in parallel conguration - screw terminals .................13
Figure 4-10 AC grid input connections for parallel conguration - plug connectors..................................14
Figure 4-11 AC grid input connections for parallel conguration - screw terminals ..................................14
Figure 4-12 Signal Connector Type .............................................................................................................15
Figure 4-13 Parallel Conguration Signal Connections ..............................................................................16
Figure 4-14 Parallel Adapter for Standalone Units......................................................................................17
Figure 4-15 Parallel Adapter for Hot-Plug Units.........................................................................................18
Figure 4-16 Signal Connections for 3-phase Y Output Conguration.........................................................19
Figure 5-1 Front Panel Display/Touch Pad..................................................................................................27
Figure 5-2 Startup and Status Menu ............................................................................................................29
Figure 5-3 Main Menu Structure .................................................................................................................30
Figure 5-4 Settings Menu Navigation..........................................................................................................32
Figure 5-5 Settings Menu Structure.............................................................................................................33
Figure 5-6 Protections Sub-menu Structure.................................................................................................36
Figure 5-7 Transfer Switch Sub-menu Structure .........................................................................................37
Figure 5-8 STS Voltage Mask......................................................................................................................38
Figure 5-9 STATUS Menu ...........................................................................................................................40
Figure 5-10 INFO Menu ..............................................................................................................................41
Figure B-1 Manual Bypass Scematic...........................................................................................................44
Figure C-1 Grounding of Neutral for Inverters with Transfer Switch .........................................................46
Figure C-1 SERVICE sub-menu structure ...................................................................................................47
Figure F-1 SLI to ACX Translator Connectors............................................................................................51
Figure F-2 Typical System Schematic .........................................................................................................53
TABLES
Table 4-1 Signal Description .......................................................................................................................15
Table 5-1 Front Panel LED Status Indications ............................................................................................28
Table A-1 Input Requirements .....................................................................................................................43
Table A-2 Input Wire Size............................................................................................................................43
Table C-1 Grounding Restrictions ...............................................................................................................46
Table E-1 Factory Settings...........................................................................................................................49
Table F-1 SLI to ACX Translator Signal Connections ................................................................................51
Table F-2 SLI to ACX Translator Power Connections ................................................................................52

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Manual No. sli-15-5 sli15-man-rev5-0718.indd
1.1 General
The SLI15 inverter is designed to operate from a DC Source, its input current features a very
low ripple. Its psophometric value is 31dBnrc (without battery). The above feature allows
the inverter to be supplied by a charger or power supply even without a battery in the circuit,
as long as the DC source has the necessary current capacity to sustain the inverter’s inrush
current and the current variations induced by load changes of which the following diagram
shows the worst case.
Figure 1-1 Input Current Absorption
Figure 1-1 shows the input current absorption with a 1500W resistive load step. Scale is
25mSec/div; 20A/div (48V input model) or 40A/div (24V input model). Input and Output
Voltages are oating; even though it is possible to refer to GND one Input or Output terminal
this connection is not required.
CAUTION It is essential to read and understand all Warnings, Cautions and Notes before
any connections are made to the Unit or System.
CAUTION Before any connections are made to the Unit or the System, be sure to
disconnect any AC load and any DC Input source. If the DC Input source is a battery, make
all connections to the inverter BEFORE connecting DC leads to the battery.
WARNING The unit is not protected from Polarity Inversion: correct polarity of DC input
leads is critical to avoid damage to the unit or system. Check DC Input source cables for
correct polarity and voltage. The inverter features an internal reverse polarity protection
diode and an upstream, non replaceable, fuse. The application of a reverse polarity may
blow the fuse and make the inverter non operating. To prevent damage a proper circuit
breaker should be installed between the DC source and the inverter’s input. Refer to the
following gure to determine the type of delay of the breaker.
Chapter 1 General Information

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Manual No. sli-15-5 sli15-man-rev5-0718.indd
Figure 1-2 Input Breaker Delay
The curve to be used is the one indicated by “70”.
1.2 Feedback & Support
For technical support or feedback, please visit https://www.unipowerco.com/contact/.
1.3 Disclaimer
UNIPOWER is not responsible for system problems that are the result of installation or
modication of the instructions provided in this manual.

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Manual No. sli-15-5 sli15-man-rev5-0718.indd
The SLI15 Inverter is designed for indoor applications, away from heat and moisture. The inverter
will provide its full performance with internal forced ventilation at ambient temperatures ranging
from -25°C to +55°C (+65°C with power derating, see also Technical Specications).
The following requirements must be considered when choosing a mounting location:
1. The Inverter must be sheltered from the elements. Select a clean, dry location.
2. The Inverter requires proper ventilation for cooling. It can be installed vertically as well
as horizontally provided there is a 10” (254mm) minimum clearance on the rear side to
provide adequate airow. The fans suck in the air from the front ventilation holes and blow
it through the rear holes.
3. The Inverter should be mounted as close to the DC Input source as possible to minimize
losses in the DC Input cables.
Chapter 2 Location Selection

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Manual No. sli-15-5 sli15-man-rev5-0718.indd
Chapter 3 Instructions
NOTE For your protection, the following information and the rest of this manual should
be read and thoroughly understood before unpacking, installing or using the equipment.
All UNIPOWER products are handed over to the delivering carrier securely packed and in
perfect condition. Upon acceptance of the package from us, the delivering carrier assumes
responsibility for its safe arrival to you.
Once you receive the product, it is your responsibility to document any damage the carrier
may have inicted, and to le your claim promptly and accurately.
3.1 Package Inspection
1. Examine the shipping crate or carton for any visible damage: punctures, dents or any
other signs of possible internal damage.
2. Describe any damage or shortage on the receiving documents and have the carrier sign
their full name.
3.2 Equipment Inspection
1. Within fteen days, open crate or carton and inspect the contents for damages. While
unpacking, be careful not to discard any equipment, parts or manuals. If any damage
is detected, call the delivering carrier to determine the appropriate action. They may
require an inspection.
Save all shipping material for the inspector to see!
2. After the inspection has been made, call us. We will determine if the equipment should
be returned to our plant for repair or if some other method would be more expeditious. If
it is determined that the equipment should be returned to us, ask the delivering carrier to
send the packages back at the delivering carrier’s expense.
3. If repair is necessary, we will invoice you for the repair so that you may submit the bill
to the delivering carrier with your claim forms.
4. It is your responsibility to le a claim with the delivering carrier. Failure to properly le
a claim for shipping damages may void warranty service for any physical damages later
reported for repair.
3.3 Handling
Handle the inverter with care. Do not drop or lean on front panel or connector. Keep away
from moisture.

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Manual No. sli-15-5 sli15-man-rev5-0718.indd
3.4 Identication Label
The model number and serial number located on the label on the cover identify the unit.
Please refer to these numbers in all correspondence with UNIPOWER.
3.5 Initial Settings
All inverters are shipped from our production facility fully checked and adjusted. Do not
make any adjustments until you have read this manual.

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Manual No. sli-15-5 sli15-man-rev5-0718.indd
Chapter 4 Mounting Procedure
NOTE Mounting brackets are included with the inverter when they are shipped from
the factory. Failure to follow proper mounting procedures could result in the unit failing
causing personal injury and equipment damage.
4.1 Rack mounting types
1. The inverters t either a 19” or a 23” inch relay rack.
2. The mounting brackets can be installed either as a ush mount or a center mount on the
inverters using the proper holes and tools as illustrated below.
3. Leave adequate clearance between this shelf and any existing shelves: a 10” (254mm)
minimum clearance is required in the rear.
4. Connect the protective earth (PE) stando located on the rear of the unit to the safety
earth connection by the proper nut and washer provided in the package of the unit.
The mounting kit provided consists of:
• 2 x 19” mounting brackets.
• 2 x 23” mounting brackets if these have been ordered.
• 8 x M4 screws to connect the brackets to the unit (4 + 4).
• 2 x handles.
• 4 x screws to connect the handles to the brackets (2 + 2).
16.7” (425mm)
15” (382mm)
Flush Mount Bracket Holes
Center Mount Bracket Holes
1.25”
31.7mm
18.3” | 465.1mm
19” | 485mm
1.75”
44.45mm
Figure 4-1 Fitting Mounting Brackets

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Manual No. sli-15-5 sli15-man-rev5-0718.indd
16.7” (425mm)
15” (382mm)
Flush Mount Bracket Holes
Center Mount Bracket Holes
1.25”
31.7mm
18.3” | 465.1mm
19” | 485mm
1.75”
44.45mm
Figure 4-2 Mounting Dimensions
4.2 Connections
DC/AC Power Inveter
SLI-48-230
ESC
ENTER
ON
I
O
OFF
AC
OUTPUT
POWER O.T. FAN FAIL FAULT
+
-
L1 PE L2 L PE N
19.1 (485)
18.3 (465.1) [19” mounting centres]
Overall Height: 1.7 (43.6)
16.7 (425)
1.4
(35.6)
1.0
(25.4)
1.01
(25.65)
14.9
(379.5)
0.4
(11)
AC Output Protective Earth (PE)
Signal Connector
AC Input (Utility)
Terminal Block
Option -SC
FRONT VIEW
TOP VIEW
REAR VIEW
Standby Status LEDs
& Display
Keypad Output Isolation
Breaker
-Ve +Ve
DC Input Busbars
Figure 4-3 Rear View
4.2.1 Input Connections (all models)
Positive (+) and Negative (-) input terminals consist of two bars located on the rear side of
the chassis, see Figure 4-4. The bars can be mated with clips or bolted to bus bars or cables.
To facilitate connection the input bars have M6 holes. Polarity identiers are marked on the
chassis.
A plastic protection screen can be provided as an accessory to protect against accidental
contact with the input terminations.
Figure 4-4 Input Connection Bus Bars
NOTE Consult Appendix “A” to set the proper wire size, length and terminal types for the
24V or 48V inverters models vs. distance from the source.

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4.2.1.1 Inserting a Hot-Plug Inverter Module Into The Sub-Rack
Before inserting the SLI15 inverter module into the sub-rack coat the inner DC input
clips with conducting paste for better electrical conduction and easier manipulation
during insertion, see Figure 4-5.
Figure 4-5 DC Input Clips in sub-rack
4.2.2 Output and Grid Connections
4.2.2.1 Models with Plug Connections
These models are equipped with the following connector types:
• Output: AC Appliance Outlet - IEC 320 socket
• Input Grid: AC Appliance Inlet - IEC 320 socket
(for inverters with Static Transfer Switch option only)
AC Output AC Grid Input
Figure 4-6 Plug Connections
4.2.2.1 Models with Screw Terminal Connections
AC Output AC Grid Input
L1 PE L2 L1 PE L2
Figure 4-7 Screw Terminal Connections

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Manual No. sli-15-5 sli15-man-rev5-0718.indd
4.2.2.3 AC Output Connections for Parallel Conguration
When connecting multiple units in parallel, pay attention to the following:
1. Observe the correct pin-to-pin correlation between the terminals avoiding cross
connections (pin 1 to pin 1, pin 2 to pin 2, etc.).
2. Take care to use cables with the same section and length for each inverter, from the
outlet terminals to the common points A, B, GND, as shown in Figures 4-8 and 4-9.
Longer cables improve the sharing current accuracy. Sharing performance is guaranteed
with 10” (250mm) minimum cable length.
1
3
2
1
3
2
LOAD
GND
AC Outlet
On
UNIT 1
AC Outlet
On
UNIT “n”
A
B
Figure 4-8 AC Output Connections for n-inverters in parallel conguration
(models with plug connectors - Note: L1=1; L2=2 ; PE=3)
LOAD
GND
AC Outlet
On
UNIT 1
AC Outlet
On
UNIT “n”
A
B
L1
L1
L2
L2
PE
PE
Figure 4-9 AC Output Connections for n-inverters in parallel conguration
(models with screw terminals)

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Manual No. sli-15-5 sli15-man-rev5-0718.indd
4.2.2.4 AC Grid Input Connections for Parallel Conguration
(models with Static Transfer Switch)
It is important to note that the cables for the AC Grid connection must be the same size
and length, see Figures 4-10 and 4-11.
It is recommended to use 11AWG / 4mm2gauge wire for 115VAC models and 13AWG
/ 2.5mm2gauge wire for 230VAC models.
1
3
2
1
3
2
AC Grid
Inlet On
UNIT 1
AC Grid
Inlet On
UNIT “n”
A
B
GRID
GRID
Length A = Length B
Figure 4-10 AC grid input connections for parallel conguration
(models with plug connectors - Note: L1=1; L2=2 ; PE=3)
AC Grid
Inlet On
UNIT 1
AC Grid
Inlet On
UNIT “n”
A
B
GRID
GRID
Length A = Length B
Figure 4-11 AC grid input connections for parallel conguration
(models with screw terminals)

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Manual No. sli-15-5 sli15-man-rev5-0718.indd
4.2.3 Signal Connections
A 15 pole connector or the optional signal connector adapter can be used for connecting
the signals.
1112131415
54321
109876
Figure 4-12 Signal Connector Type : Molex 89263-6065 (CON SUB 15HD)
Pin Name Description
1 General Failure Normally open; active low. It provides a general failure indication related
to any fault condition (see “General failure” Table in section 5 “User’s
Guide”). It is referenced to Pin 4 “Signal Return”.
2 +T/R Dedicated to the serial link for RS485. They are referenced to Pin 4,
“Signal Return”.
3- T/R
4 Signal Return Signal return for signals on Pins 1-3. This pin can be connected to an
external ground.
5 Master Indicator Master indicator: For parallel mode only.
6 Chassis Ground Common GND (chassis) for all the signals from Pin 7 to pin 15.
7 Remote ON/OFF Remote ON/OFF. Active low. It must be connected to Pin 6 (through
a switch or relay), to turn on or o󰀨 the unit remotely. The pin must be
enabled from the front panel. Go to the settings menu and turn ON the
remote ON/OFF option.
Please note: If you do not use remote ON/OFF capability then you
must leave the pin unconnected. Otherwise the Remote OFF option set
through front panel will not have any e󰀨ect.
8 Sync-120 Dedicated to the synchronization of units Y connected for 3-phase
voltage generation.
9 - Not used.
10 -TR/I (Reserved) Reserved (do not connect to this pin).
11 Transfer Sync For parallel mode between units with Static Transfer Switch option only.
12 Output Sync For parallel mode only.
13 Sync-240 Dedicated to the synchronization of units Y connected for 3-phase
voltage generation.
14 Sync For parallel mode only.
15 +TR/I (Reserved) Reserved (do not connect to this pin).
Table 4-1 Signal Description

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Manual No. sli-15-5 sli15-man-rev5-0718.indd
4.2.3.1 Connecting units in parallel using the 15-pole connector
To operate two or more (max. 6) SLI15 inverters in parallel, pins 5, 6, 12, 14 of each
unit must be connected together as shown in Figure 4-13.
Pins 1, 4, 6, 7 should also be connected between the units.
For inverters with the Static Transfer Switch option, pin 11 of each unit must also be
connected together to ensure synchronization of the Static Transfer Switches in each
unit.
Pins 5
Pins 6
Pins 14
Pins 12
Pins 11
InverterA
Inverter B
Inverter C
Figure 4-13 Parallel Conguration Signal Connections

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Manual No. sli-15-5 sli15-man-rev5-0718.indd
4.2.3.4 Connecting standalone units in parallel using the optional Paralleling Adapter
By using the Paralleling Adapter shown in Figure 4-14, parallel connections between several
units as shown in Figure 4-13 is simplied. Pin assignment is the same as described in Table
4-1 on page 16 for the 15-pole connector.
If units are paralleled and pin-to-pin connection of the signal connectors is done, it is not
possible to discriminate signals coming from each individual unit.
If such discrimination is needed, the signal connector on the adapter should be used by
removing the jumper on the board (see Figure 4-15D) and taking the fault signal individually
from the associated connectors.
Figure 4-14 Parallel Adapter for Standalone Units
UNIPOWER provides a paralleling adapter kit which consists of one board assembly and
one link cable/ferrite assembly. One kit is required for plugging into each inverter in a
paralleled set. The part number for ordering this kit is 3C35000KIT7G, see the data sheet.

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Manual No. sli-15-5 sli15-man-rev5-0718.indd
4.2.3.5 Connecting hot-plug units in parallel using the Hot-Plug Sub-Rack
The Paralleling Adapter shown in Figure 4-15 is an integral part of the hot-plug sub-rack.
Interconnection of the signals between units is achieved by plugging in the link cable/ferrite
as assembly shown. Pin assignment is the same as described in Table 4-1 on page 16 for the
15-pole connector.
If units are paralleled and pin-to-pin connection of the signal connectors is done, it is not
possible to discriminate signals coming from each individual unit.
If such discrimination is needed, the signal connector on the adapter should be used by the
jumper on the board (see Figure 4-15 C & D ) and taking the fault signal individually from
the associated connectors.
Figure 4-15 Parallel Adapter for Hot-Plug Units
One link cable/ferrite assembly, order part number 3C3500KITHPG, will be required for for
connecting between each shelve, e.g. for 3 units in parallel two are required.

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Manual No. sli-15-5 sli15-man-rev5-0718.indd
4.2.3.3 Generation of a 3-phase Y voltage
To generate a 3-phase voltage 3 SLI15 inverters can be connected in a Y conguration.
Figure 4-16 shows an example of the necessary connections. Be aware that the 3-phase
conguration needs to be enabled via the service menu of the unit (see section 5 “User’s
Guide”).
Master indicator (pin 5)
Sync (pin 14)
Sync_120 (pin 8)
Sync_240 (pin 13)
Chassis ground (pin 6)
Chassis ground (pin 6)
Chassis ground (pin 6)
Output Sync (pin 12)
Output Sync (pin 12)
Inverter
#3b
Inverter
#2b
Inverter #1b
Inverter #3a
Inverter #2a
Inverter #1a
Output Sync (pin 12)
Master indicator Master indicator
Master indicator
Master indicator
R
R
Y
Y
B
B
N
Figure 4-16 Signal Connections for 3-phase Y Output Conguration
NOTE 3 paralleled pairs of SLI15 inverters may also be congured in this way to provide
a total of 3000W per output phase.

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Manual No. sli-15-5 sli15-man-rev5-0718.indd
4.3 Step by Step procedure to turn on the unit
4.3.1 Models without the optional Static Transfer Switch, in stand-alone conguration
1. Make sure every AC load is disconnected and the AC Output Breaker on the front panel
is turned OFF.
2. Connect the signal connector according to paragraph 4.2.3.
3. Make DC input connections to the inverter as described in paragraph 4.2.1. The display
unit lights up and shows “STAND BY…” Refer to section 5 “User’s Guide”, page 3.
4. Press ENTER to show the status of the unit and verify on the display that the current
Mode is “Stand Alone Mode” (you can change the settings for Frequency, Voltage,
Current Limit and Remote ON/OFF only if the unit’s Mode is “Stand Alone”. Refer to
section 5 “User’s Guide”, Note on page 9).
5. Optional: Change factory settings as desired for the following: Frequency, Voltage,
Current Limit and Remote ON/OFF through the “SETTINGS MENU” (for procedures
and factory settings see section 5 “User’s Guide”, page 8).
6. Switch the AC Output Breaker ON (the “Power” LED lights up GREEN) and check on
the display that the output voltage from the inverter is 230Vac (115Vac). Turn the AC
Breaker OFF.
7. Press the ON/OFF button to place the inverter in stand-by.
4.3.1.1 Turning on the Load
Check that the rated input power of the load is less or equal to the rated output power of
the inverter.
Connect the load to the inverter as described in paragraph 4.2.2.
Press the ON/OFF key to turn the unit ON.
Switch the front panel AC Output Breaker ON. The unit should now be feeding the load.
4.3.2 Models without the optional Static Transfer Switch, in parallel conguration
4.3.2.1 Setting up the units
Make sure every AC load is disconnected and the AC Output Breaker on front panel of
each inverter is turned OFF.