Emerson SOLAHD S4KC Series User manual

Industrial On-Line UPS - 120 V, 700 VA - 3000 VA
S4KC Series
Instruction Manual

While every precaution has been taken to ensure accuracy and completeness in this manual, Appleton Grp LLC d/b/a
Appleton Group assumes no responsibility, and disclaims all liability for damages resulting from use of this information or
for any errors or omissions.
The SolaHD and Emerson logos are registered in the U.S. Patent and Trademark Oce. All other product or service names
are the property of their registered owners.
©2018 Appleton Grp LLC d/b/a Appleton Group. All rights reserved. Specications are subject to change without notice.

S4K2UC SERIES USER MANUAL | iii
Contents
Important Safety Precautions 6
Save these Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Battery Safety Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Electromagnetic Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Information for the Protection of the Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Glossary of Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.0 Product Description 9
1.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.2 Available Models. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.3 Appearance & Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.3.1 Front Panel & Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.3.2 Rear Panel Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.4 Major Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
1.4.1 Surge Protection Device (SPD) & EMI/RFI Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
1.4.2 Rectier/Power Factor Correction (PFC) Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
1.4.3 Inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
1.4.4 Battery Charger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
1.4.5 DC-DC Converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
1.4.6 Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
1.4.7 Dynamic Bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
1.5 Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
1.5.1 Utility (VAC) Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
1.5.2 Manual Bypass Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
1.5.3 Battery Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
1.5.4 Battery Recharge Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
1.5.5 Frequency Converter Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

iv | Contents
2.0 Installation 15
2.1 Unpacking & Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.2 What’s Included . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.3 Preparation for Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.3.1 Installation Environment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.3.2 Installation Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.4.1 Tower Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.4.2 Rack Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.5 Cable Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
2.5.1 Connecting Input Plug & Loads. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
2.5.2 AC Input/Output Hardwire Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
2.5.3 Connecting Battery Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
2.6 Connecting Communication Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
2.6.1 Connecting USB Communication Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
2.6.2 Installing the Optional IntelliSlot Card & Communication Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.0 Control & Indicators 26
3.1 Control Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3.1.1 On/Alarm Silence/Manual Battery Test Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3.1.2 Standby/Manual Bypass Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.2 Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.2.1 Battery Level Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.2.2 Load Level Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
3.2.3 UPS Status Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
4.0 Operation 29
4.1 Startup Checklist for the S4K2UC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.2 Starting the UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.3 Manual Battery Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.4 Manual Bypass. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
4.5 Shut Down the S4K2UC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
4.6 Disconnecting Input Power from the S4K2UC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

S4K2UC SERIES USER MANUAL | v
5.0 Communication 31
5.1 IntelliSlot Communication Cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5.1.1 MultiLink . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5.2 USB Port Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5.2.1 Conguration Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.3 Terminal Block Communication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.3.1 Any Mode Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.3.3 On Battery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.3.4 Low Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
6.0 Battery Cabinet 35
7.0 Maintenance 36
7.1 Replacing the Internal Battery Pack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
7.1.1 Battery Replacement Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
7.2 Battery Charging. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
7.3 Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
7.4 Checking UPS Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
7.5 Checking UPS Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
8.0 Troubleshooting 39
8.1 UPS Symptoms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
8.1.1 Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
8.1.2 Audible Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
8.2 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
9.0 Specications 42
10.0 Warranty & Support 47
10.1 Warranty Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
10.2 Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

6| Important Safety Instructions
IMPORTANT SAFETY PRECAUTIONS
!WARNING
Observe all cautions and warnings in this manual. Failure to do so may result in serious injury or death.
Refer all UPS and battery service to properly trained and qualied service personnel. Do not attempt to service this
product yourself and never work alone.
Opening or removing the cover may expose you to lethal voltages within this unit, even when it is apparently not
operating and the input wiring is disconnected from the electrical source.
SAVE THESE INSTRUCTIONS
This manual contains important safety instructions that must be followed during the installation and maintenance of the
UPS and batteries. Read this manual thoroughly before attempting to install or operate this UPS.
This UPS contains no user-serviceable parts. The O/Bypass push button does not electrically isolate internal parts. Under
no circumstances should you attempt to gain internal access other than to replace the batteries due to risk of electric
shock or burn. Do not continue to use the UPS if the front panel indicators are not in accordance with these operating
instructions or if the UPS performance alters in use. Refer all faults to your local distributor, SolaHD representative or
SolaHD Technical Support.
This UPS has an internal battery, and the output receptacles of the UPS may carry live voltage even if the UPS is not
connected to utility input power.
Before moving or rewiring this UPS, disconnect utility input power and the battery and make sure that the UPS is
completely shut down. Otherwise, the output terminal may carry live voltage, presenting an electric shock hazard.
To ensure human safety and normal UPS operation, the UPS must be properly grounded before use.
When the UPS is connected to an IT power distribution system, a short-circuit protection device must be installed on the
neutral line.
Install and use the S4K2UC in the following environments:
• Temperature: 0°C – 40°C (32°F – 104°F); Relative humidity: 0% – 95%, non-condensing
• Out of direct sunlight
• Away from heat sources
• Stable surface, not subject to vibrations or shocks
• Away from dust and other particulates
• Away from corrosive substances, salts and ammable gases
Keep the air inlet and outlet of this UPS unobstructed. Poor ventilation will increase the internal temperature of the UPS
and can adversely aect the UPS and its batteries.
Keep liquid and foreign objects away from the UPS.
In case of re, use a dry chemical re extinguisher to put out the re. Using a uid re extinguisher may cause electric shock.
This UPS is not intended for use with life support and other designated critical devices. Maximum load must not exceed
that shown on the UPS rating label. This UPS is designed for data processing equipment. If uncertain, consult your local
dealer or SolaHD representative.

S4K2UC SERIES USER MANUAL | 7
This UPS is not for use in a computer room as dened in the standard for the Protection of Electronic Computer/Data
Processing Equipment, ANSI/NFPA 75.
The S4K2U3000-C was investigated under 30 A branch circuit in accordance with the National Electrical Code, ANSI/NFPA
70, to reduce the risk of re; connect only a circuit provided with 30 A maximum branch overcurrent protection.
Battery Safety Notes
!CAUTION
Do not dispose of batteries in a re; they may explode. Dispose of used batteries according to local regulations.
Do not open or mutilate the batteries. Released electrolyte is toxic and harmful to skin and eyes. If electrolyte comes
into contact with the skin, wash the aected area immediately and get medical attention.
!CAUTION
A battery can present a risk of electrical shock and high short circuit current. The following precautions should be
observed when working with batteries:
• Remove watches, rings and other metal objects.
• Use tools with insulated handles.
• Wear rubber gloves, boots, and safety glasses.
• Do not lay tools or metal parts on top of batteries.
• If the battery pack is damaged in any way or shows signs of leakage, please contact your SolaHD representative
immediately.
• Disconnect charging source prior to connecting or disconnecting battery terminals.
• Determine if the battery is inadvertently grounded. If it is inadvertently grounded, remove the source of the
ground. Contact with any part of a grounded battery can result in electrical shock. The likelihood of such shock
will be reduced if grounds are removed during installation and maintenance (applicable to a UPS and a remote
battery supply not having a grounded supply circuit).
• When replacing batteries, replace with the same type and number of batteries or battery packs.
Electromagnetic Compatibility
The S4K2UC complies with the limits for a CLASS A DIGITAL DEVICE, PURSUANT TO Part 15 of FCC rules. Operation is
subject to the following two conditions: (1) This device may not cause harmful interference and (2) This device must
accept any interference received, including interference that may cause undesired operation. Operating this device in a
residential area is likely to cause harmful interference that users must correct at their own expense.
The S4K2UC Series complies with the requirements of EMC Directive 2004/108/EC and the published technical standards.
Continued compliance requires installation in accordance with these instructions and use of accessories approved by
SolaHD.
NOTICE: This product is for restricted sales distribution to informed partners. Installation restrictions or additional
measures may be needed to prevent radio interference.
Information for the Protection of the Environment
UPS Servicing: The UPS makes use of components dangerous for the environment (e.g. batteries, electronic cards, and
electronic components). The components removed must be taken to specialized collection and disposal centers.

8| Important Safety Instructions
Glossary of Symbols
Risk of electrical shock
Indicates caution followed by important instructions
AC input
AC output
Requests the user to consult the manual
Indicates the unit contains a valve-regulated lead acid battery
Recycle
DC voltage
Equipment grounding conductor
Bonded to ground
AC voltage
ON/Alarm Silence/Battery Test
OFF/Bypass
WEEE
!
i
PbH2SO4
-
+
R

S4K2UC SERIES USER MANUAL | 9
1.0 Product Description
The SolaHD S4K2UC Series is a compact, on-line uninterruptible power system (UPS) that continuously conditions and
regulates its output voltage. It is designed to supply microcomputers and other sensitive equipment with clean sine
wave input power.
Upon generation, AC power is clean and stable. However, during transmission and distribution it is subject to voltage
sags, spikes and complete failure that may interrupt computer operations, cause data loss and damage equipment. The
S4K2UC protects equipment from these disturbances. The S4K2UC continuously charges its batteries from utility power,
enabling it to supply power to connected loads even when utility power fails.
This section describes the UPS, its features, models, appearance, components, operating principles, and operating modes.
1.1 Features
• Intelligent battery management to extend the battery life
• Operation and display panel with LED for monitoring load percentage and battery capacity independently
• Flexible network management with MultiLink™ software
• Fan fault self-inspection and automated diagnostic function
• Intelligent fan operation, automatically changing rotation speed depending on system requirements to decrease
power consumption and noise
• Input circuit breaker to ease recovery from overloads
• Safety approval from UL and cUL
• Communication options: USB port, IntelliSlot® port and terminal block communication
• Dry contacts for remote monitoring
• Input power factor greater than 0.99 at 100% load
• Output voltage selection function using the conguration software
1.2 Available Models
Available models of the UPS are shown in Table 1:
Table 1: UPS Models & Power Ratings
Model Nominal Power Rating
S4K2U700C 700 VA/630 W
S4K2U1000C 1000 VA/900 W
S4K2U1500C 1500 VA/1350 W
S4K2U2000C 2000 VA/1800 W
S4K2U3000C 3000 VA/2700 W

10 | 1.0 Product Description
1.3 Appearance & Components
1.3.1 Front Panel & Controls
The SolaHD S4K2UC rack/tower models, in various power ratings, have the same general appearance, controls and
features (see Figure 1). The various rack/tower models dier largely in the receptacle type.
Operation and Display Panel
VentilationSlots
Figure 1: S4K2UC rack/tower models—front view
1.3.2 Rear Panel Features
The rear panel of the S4K2UC has these features (see Figure 2):
• USB port
• Cooling fan
• Power output receptacles
• Input circuit breaker
• IntelliSlot port
• Communication terminal block
• Input power cable

S4K2UC SERIES USER MANUAL | 11
Input Power Plug
and Cable 5-15P
External
Battery
Connector
Terminal Block
Communication
USB Port Input Circuit
Breaker
Output
Receptacles,
5-15R
700 VA, 1000 VA, 1500 VA Models
Input Power Plug
and Cable, 5-20P
External
Battery
Connector
USB Port Input Circuit
Breaker
Output
Receptacles,
5-15/20R
2000 VA Model
Input Power Plug
and Cable, L5-30P
USB Port
External
Battery
Connector
Input Circuit
Breaker
Output Receptacles,
5-15/20R
Output
Circuit
Breakers
3000 VA Model
IntelliSlot
Port
IntelliSlot
Port
IntelliSlot
Port
Terminal Block
Communication
Terminal Block
Communication
Output Receptacle,
L5-30R
Cooling
Fan
Cooling
Fan
Cooling
Fan
Figure 2: S4K2UC 120 V rack/tower models—rear panel components

12 | 1.0 Product Description
1.4 Major Components
The operating principle of the UPS is illustrated in Figure 3.
L1
Dynamic
Bypass
Input
DC-DC
Converter
Rectifier /
PFC Inverter
Battery
Battery
Charger
L1 SPD & EMI/
RFI Filters
L2/N
Output
L2/N
GG
Figure 3: Operating principle diagram
The UPS is composed of utility input, SPD and EMI/RFI lters, rectier/PFC, inverter, battery charger, DC-DC converter,
battery, dynamic bypass, and UPS output.
1.4.1 Surge Protection Device (SPD) & EMI/RFI Filters
The S4K2UC has surge protection and lters that protect the connected load from power surges, electromagnetic inter-
ference (EMI) and radio frequency interference (RFI). These features can minimize any surges or interference present in
the utility power. The lters also prevent surges or interference generated by the UPS from adversely aecting devices
connected on the same branch as the UPS.
1.4.2 Rectier/Power Factor Correction (PFC) Circuit
In normal operation, the S4K2UC’s rectier/power factor correction (PFC) circuit converts utility power to regulated DC
power for use by the inverter, while ensuring that the wave shape of the input current used by the UPS is near ideal.
Extracting this sine wave input current achieves two objectives:
• Ecient power use by the UPS
• Reduced reected harmonics
This results in cleaner power being available to other devices in the building not protected by the S4K2UC.

S4K2UC SERIES USER MANUAL | 13
1.4.3 Inverter
In normal operation, the S4K2UC’s inverter utilizes the DC output of the PFC rectier to produce precise, regulated sine
wave AC power. When utility power fails, the inverter receives DC power from the DC-DC converter. In either operation
mode, the UPS inverter is online, continuously generating clean, precise, regulated AC output power.
1.4.4 Battery Charger
The battery charger utilizes energy from the utility power and precisely regulates it to continuously oat charge the
batteries. The batteries are being charged whenever the S4K2UC is plugged in, even when the UPS is not turned on.
1.4.5 DC-DC Converter
The DC-DC converter raises the DC voltage from the battery to the optimum operating voltage for the inverter. This
allows the inverter to operate continuously at its optimum eciency and voltage, thus increasing reliability.
1.4.6 Battery
The S4K2UC uses valve-regulated, non-spillable, lead acid batteries. To maintain battery design life, operate the S4K2UC
in an ambient temperature of 0°C to 25°C (32°F to 77°F).
NOTE: Optional external battery cabinets are available to extend battery run times.
1.4.7 Dynamic Bypass
The S4K2UC provides an alternate path for utility power to the connected loads in the unlikely event of a UPS malfunc-
tion. Should the S4K2UC have an overload, overtemperature or UPS failure condition, the UPS automatically transfers the
connected loads to bypass.
NOTE: The bypass power path does not protect the connected loads from disturbances on the utility.
1.5 Operating Modes
The UPS operating modes include: Utility (VAC) Mode, Bypass Mode, Battery Mode, Battery Recharge Mode, and
Frequency Converter Mode. For descriptions of indicators and control buttons, refer to“3.0 Controls & Indicators”.
1.5.1 Utility (VAC) Mode
During Utility (VAC) Mode, utility power provides energy to the S4K2UC. The lters, PFC rectier and the inverter process
this power to provide computer-grade power to connected loads. Meanwhile, the UPS maintains the batteries in a fully
charged state.
1.5.2 Manual Bypass Mode
Manual Bypass Mode occurs when the Standby/Manual Bypass button is pressed and held for about 2 seconds while
the S4K2UC is in Utility (VAC) Mode. Bypass operation is indicated by an audible alarm and illuminated amber bypass
indicator. (If other indicators are illuminated, refer to “8.0 Troubleshooting”). During Manual Bypass Mode, utility power
bypasses the inverter and provides energy to the connected load.
!CAUTION
Turning o the UPS in Manual Bypass Mode will result in loss of output power and dropped loads.

14 | 1.0 Product Description
1.5.3 Battery Mode
The S4K2UC enters Battery Mode when utility power fails or is outside acceptable values. The battery system supplies
power through the DC-DC converter to the inverter to generate clean AC power for the connected loads.
When the S4K2UC enters Battery Mode, the UPS sounds a half-second beep at 10-second intervals.
When approximately 2 minutes of run time remains, the beeps sound every 5 seconds to warn that the battery is getting
low (this low battery warning is user-congurable).
In Battery Mode, the AC Input indicator goes o and the Battery Level indicators illuminate. Each Battery Level indicator
represents a 20% capacity level. As capacity decreases, fewer indicators remain illuminated. Refer to“8.0 Troubleshooting”.
For approximate battery run times, refer to“9.0 Specications—Table 13”. The times in Table 13 are approximate. They are
based on resistive loads and an ambient temperature of 25°C (77°F). To increase this time, turn o non-essential loads
(such as idle computers and monitors) or add optional external battery cabinets.
!CAUTION
Turning o the S4K2UC while in Battery Mode will result in loss of output power. If the UPS is turned o manually, it
must be manually restarted after utility power returns. If the UPS is turned o by a communication signal or because
the batteries are depleted, it will operate as selected in the conguration program for Auto-Restart (refer to “5.2.1
Conguration Program”).
1.5.4 Battery Recharge Mode
Once utility power is applied to the S4K2UC, the battery charger begins charging the batteries.
1.5.5 Frequency Converter Mode
All models of the S4K2UC are capable of frequency conversion. Frequency Conversion Mode can be selected using the
conguration program. Allowable frequency operating modes include:
• Auto Sensing— 50 Hz or 60 Hz — Bypass Enabled
• Auto Sensing— 50 Hz or 60 Hz — Bypass Disabled
• Frequency Converter — 50 Hz — Bypass Disabled
• Frequency Converter — 60 Hz — Bypass Disabled
NOTE: The default for all models of the S4K2UC is“Auto Sensing — 50 Hz or 60 Hz — Bypass Enabled.”
!CAUTION
Do not touch the AC input receptacle when the UPS is operating. AC input voltages may still be present, even when
the AC input indicator is o.

S4K2UC SERIES USER MANUAL | 15
2.0 Installation
2.1 Unpacking & Inspection
Unpack the UPS and conduct the following checks:
• Inspect the UPS for shipping damage. If any shipping damage is found, report it to the carrier and your local dealer
or SolaHD representative immediately.
• Check the accessories against the delivery list. If there are any discrepancies, contact your local dealer or SolaHD
representative immediately.
2.2 What’s Included
• Compact disk containing: MultiLink, conguration program and user manual
• One, 6-1/2 ft. (2 m) long USB cable
• Mounting hardware, including screws and handles
• Two plastic tower stand sets (four pieces total)
• Terminal block communication terminals
• Warnings, Safety Instructions booklet and WEEE recycling sheet (ISO 14001 compliance)
NOTE: The S4K2UC external battery cabinet shipping package includes one battery cabinet, two spacers for tower
conguration and one DC power cable.
2.3 Preparation for Installation
2.3.1 Installation Environment
• Install the UPS indoors in a controlled environment, where it cannot be accidentally turned o. The installation envi-
ronment should meet the specications listed in“9.0 Specications”.
• Place the UPS in an area of unrestricted airow around the unit, away from water, ammable liquids, gases, corro-
sives, and conductive contaminants. Avoid direct sunlight.
NOTE: Operating the UPS in temperatures above 25°C (77°F) reduces battery life.
2.3.2 Installation Clearances
Maintain at least 4 inches (100 mm) clearance in the front and rear of the UPS. Do not obstruct the air inlets on the front
panel and rear panel of the UPS; blocking the air inlets reduces ventilation and heat dissipation, shortening the service
life of the unit.

16 | 2.0 Installation
2.4 Mechanical Installation
The S4K2UC may be installed as a tower or in a rack, depending on space and use considerations. The S4K2UC may be
used alone, as a single UPS, or with up to four battery cabinets.
NOTE: When installing the UPS or making input/output connections, comply with all relevant safety codes and standards.
2.4.1 Tower Installation
To install the S4K2UC as a tower:
1. Take out support bases from the accessories (see Figure 4).
Support Bases
Spacers
Connectors
Figure 4: Support bases
2. If optional external battery cabinets will be connected to the UPS, take out the spacers shipped with the battery
cabinet.
3. Connect the spacers and the support bases as shown in Figure 4. Each S4K2UC needs two assembled support bases,
one in the front and one in the rear.
4. Adjust the direction of the operation and display panel on the S4K2UC.
a. Remove the front metal bezel cover as shown in Figure 5.
Front Metal Bezel Cover
Screws (2 pcs)
Figure 5: Remove the front metal bezel cover

S4K2UC SERIES USER MANUAL | 17
b. Using the nger grips on the display panel, gently pull and rotate 90 degrees clockwise and snap it back into posi-
tion as shown in Figure 6.
Operation and Display Panel
Rotated Clockwise 90 Degrees
Figure 6: Rotate the operation and display panel
c. Replace the front metal bezel cover on the S4K2UC. At this point, the UPS operation and display panel has been
rotated 90 degrees clockwise, which provides upright viewing for users.
5. Place the S4K2UC and any battery cabinets on the support bases. Each S4K2UC needs two support assemblies as
shown in Figure 7.
Operation and
Display Panel
Rotated for
Tower Operation
Support Bases Support Bases
S4K2UC UPSS4K2UC UPS and
External Battery Cabinet
Figure 7: Tower installation

18 | 2.0 Installation
2.4.2 Rack Installation
NOTES:
• When the S4K2UC is installed in a rack, it must be supported by a shelf, xed rails or slide rails on each side. The
factory-supplied rack mount handles cannot support the weight of the UPS. They are used to move the UPS into
and out of the rack and to attach the UPS to the rack.
• Mounting hardware and slide rails are sold separately. Contact your local SolaHD representative for these options.
To install a S4K2UC in a rack:
1. Unpack the two slide rail assemblies and mounting hardware from the rack mounting kit (P/N: SRS1832). Slide rail
assembly includes inner member and front and rear members. They are interchangeable between left-hand or right-
hand. Mounting hardware includes M4 screws and M5 screws.
2. Remove inner member of each slide rail assembly by extending it to its outermost position, depressing the retaining
latch and then pulling inner member from bracket assembly (see Figure 8).
Inner member
Bracket assembly
Pullout
Retaining latch
Figure 8: Pulling inner member from each bracket assembly
3. Determine the S4K2UC’s mounting position inside the racks vertical rails.
!CAUTION
Install the S4K2UC as low as possible in the rack to reduce the risk of tipping.
4. Attach the rear member of each slide rail assembly to the rack’s rails with two factory-supplied M5 screws (see Figure 9).
M5 screw (4 pcs)
Vertical pole
Rear member
Front member
Figure 9: Installing rear member of each slide rail assembly

S4K2UC SERIES USER MANUAL | 19
5. Extend the slide rail assembly by sliding the front member forward until it touches the rack’s front vertical rails
(adjustable length: 18–32 inches/457–813 mm). Use two M5 screws to x each front member onto the front vertical
rails through the installation holes. Make sure that slide rail assemblies are at the same mounting height on all four
rack rails, as shown in Figure 10.
Rear
Member
Front
Vertical
Pole
Front
Member
M5 Screw
(4 pcs)
Slide
Figure 10: Installing front member of each slide rail assembly
6. Fasten rear member and front member together using four M4 screws and four M4 nuts (M4 nuts have been installed
on the rear member before delivery) per slide rail assembly as shown in Figure 11.
M4 Screw (8 pcs)
Rear Member
Front member M4 Nut (8 pcs)
Figure 11: Fastening rear member and front member together

20 | 2.0 Installation
7. Fasten inner members (pulled from the slide rail assemblies in Step 2) to both sides of the UPS with eight M4 screws
provided in this kit. Make sure that the retaining latch is near the rear of the UPS as shown in Figure 12.
M4 screw (8 pcs)
Retaining latch
Inner member
UPS
Figure 12: Installing inner members
8. Use M4 screws to install ears on both sides of the UPS as shown in Figure 13.
M4 screw (8 pcs)
Rack mount handles (2 pcs)
UPS
Figure 13: Installing rack mount handles
9. Insert the UPS, with inner members attached, into the slide rail assemblies by inserting the top and bottom edges of
the inner members into the top and bottom curved tracks of the front members. Slide the UPS into the rack as shown
in Figure 14.
NOTE: The ends of the inner members are tapered to allow the rear of the UPS to be angled upward before insertion,
if space allows. Do not use the factory supplied rack handles to lift the UPS; their intended use is to slide the UPS in
and out of the rack.
NOTE: The UPS should move smoothly into the slide rail assemblies. If not, recheck the alignment of the front and rear
members from Steps 4 through 6.