Minuteman EN350 User manual

User's Manual
Para Systems, Inc.
1455 LeMay Dr.
Carrollton, TX 75007
Phone: [phone]
Fax: [phone]
Internet: minutemanups.com
UPS Sizing: sizemyups.com
PN - 34000495 R3
Enspire Series UPS
EN350 / EN550

1
1. Introduction 2
2. Controls and Indicators 6
3. Installation 8
4. Operation 11
5. Troubleshooting 14
6. Replacing the Battery 15
7. Obtaining Service 18
8. Specifications 19
9. Limited Product Warranty 21
A1. Declaration of Conformity 22
Table Of Contents

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Thankyouforpurchasingthispowerprotectionproduct. Ithasbeendesigned
and manufactured to provide many years of trouble free service. Please read
thismanualbeforeinstallingyourEnspireSeriesUPS,modelsEN350,EN550
asitprovidesimportantinformationthatshouldbefollowedduringtheinstalla-
tion and the maintenance of the UPS system allowing you to correctly set up
your system for the maximum safety and performance. Included is informa-
tion on customer support and factory service, if it is required. If you experi-
enceaproblemwiththeUPSsystemplease refer to theTroubleshooting guide
in this manual to correct the problem or collect enough information so that the
Technical Support Department can assist you.
CAUTION! Themaximumambientoperatingtemperaturefor this UPS series
is 40°C (“0 ~ 40°C” for Ambient Operation).
Theexternalventsandopeningson the UPS are provided for ventilation.
To ensure reliable operation of the UPS and to protect the UPS from over-
heating,these vents andopeningsmustnot be blocked orcovered.Do not
insert any object into any of the vents or openings that may hinder the ve-
ntilation.
Installthe UPS system in awellventilatedarea, away from excess moistu-
re,heat,dust,flammablegasorexplosives.
Leaveadequate space (at least 20cm)aroundallsides of the UPS system
forproperventilation.
Before usage, you must allow the UPS system to adjust to room temper-
ature (20°C~25°C or 68°F~77°F) for at least one hour to avoid moisture
condensing inside the UPS.
IMPORTANT SAFETYINSTRUCTIONS
SAVE THESE INSTRUCTIONS !
CONSIGNES DE SÉCURITÉ IMPORTANTES
SAUVEGARDEZ CES CONSIGNES!
Chapter 1: Introduction
WARNING: Risk of Electrical Shock. Hazardous live parts inside these
power supplies are energized from the battery even when the AC input is
disconnected.
CAUTION! To de-energize the outputs of the UPS:
1. If the UPS is on press and release the On/Off Button.
2. Disconnect the UPS from theAC wall outlet.
3. To completely de-energize the UPS, disconnect the battery.
CAUTION! To reduce the risk of electrical shock in conditions where the
load equipment grounding cannot be verified, disconnect the UPS from the
AC wall outlet before installing a computer interface cable. Reconnect the
power cord only after all signaling connections are made.
CAUTION! Connect the UPS to a two pole, three wire, grounded, utility
power AC wall outlet. The receptacle must be connected to the appropriate
branch protection (circuit breaker or fuse). Connection to any other type of
receptaclemay result in a shock hazard and violate local electrical codes. Do
not use extension cords, adapter plugs, or surge strips.
CAUTION! To reduce the risk of electrical shock with the installation of this
UPS equipment and the connected equipment, the user must ensure that the
combined sum of theAC leakage current does not exceed 3.5mA.
WARNING: ThisUninterruptible PowerSupplycontainspotentially hazard-
ous voltages. Do not attempt to disassemble the UPS beyond the battery
replacement procedure. This UPS contains no user serviceable parts. Re-
pairs and battery replacement must be performed by QUALIFIED SERVICE
PERSONNELONLY.
CAUTION! To reduce the risk of fire, connect only to a utility power circuit
provided with 20 amperes maximum branch circuit over-current protection in
accordance with the National Electric Code,ANSI/NFPA70.
WARNING: Qualified Service Personnel ONLY must perform the Installa-
tion and Servicing of these UPS systems. MINUTEMAN accepts no liabilities
and is not limited to: injury to the Service Personnel, or damages to; the UPS,
or the connected equipment caused by the incorrect installation or servicing
of the UPS system.
Veuillezlirecemanuel avantl'installationde l'onduleurmodèlesEN350,EN550.
Il contient de l'information importante qui doit être respectée au cours de
l'installation et de l'entretien de l'onduleur et des batteries. Cette information
vous permettra de correctement installer le système pour atteindre son
rendementmaximum en toute sécurité.
CAUTION! This UPS series is ONLYintended to be installed in an indoor
temperature controlled environment that is free of conductive contaminants.
This UPS series is not intended for use in a computer room as defined in the
Standard for the Protection of Electronic Computer/Data Processing Equip-
mentANSI/NFPA75.

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Life Support Policy
Asa general policy,we do not recommend the use of any of our productsin life
supportapplications where failure ormalfunctionof the product canbereason-
ablyexpected to cause failure of the life supportdeviceortosignificantly affect
its safety or effectiveness. We do not recommend the use of any of our prod-
ucts in direct patient care. We will not knowingly sell our products for use in
suchapplicationsunlessPara Systems receives, in writing, assurances satis-
factory to us that (a) the risks of injury or damage have been minimized, (b)
the customer assumes all such risks, and (c) our liability is adequately pro-
tected under the circumstances.
Afterremoving yourUPSfrom itscarton,it should beinspected for damagethat
may have occurred in shipping. Immediately notify the carrier and place of
purchase if any damage is found. Warranty claims for damage caused by the
carrierwillnotbe honored. The packing materials that your UPS was shipped
in are carefully designed to minimize any shipping damage. In the unlikely
case that the UPS needs to be returned to the manufacturer, please use the
original packing material. Since the manufacturer is not responsible for ship-
pingdamageincurred when the system is returned, the original packing mate-
rialis inexpensive insurance. PLEASE SAVE THE PACKING MATERIALS!
Receiving Inspection
NOTE: TheseUPSsareshippedwiththebatteriesdisconnected. Thebatter-
ies must be connected before putting these UPSs into service. Refer to Sec-
tion 3 "Installation" for connecting the batteries.
NOTICE: Thisequipment has been tested and found to comply with the limits
for a Class B computing device in accordance with the specifications in Sub-
partJof Part 15 of FCC Rules and the Class Blimitsforradio noise emissions
fromdigital apparatussetout in theRadioInterference oftheCanadian Depart-
ment of Communications. These limits are designed to provide reasonable
protection against such interference in a residential installation. This equip-
mentgeneratesanduses radiofrequencyand ifnot installedand usedproperly,
that is, in strict accordance with the manufacturer's instructions, this equip-
ment may cause interference to radio and television reception. If this equip-
ment does cause interference to radio or television reception, which can be
determinedby turningthe equipment offand on,theuser isencouragedto tryto
correcttheinterferencebyoneormoreofthefollowingmeasures:
Reorientthereceivingantenna.
Relocatethecomputerwithrespect to the receiver.
Movethe computer awayfromthereceiver.
Plugthecomputerintoadifferent outlet so that the computer and receiver
areon different branch circuits.
Shieldedcommunications interface cables must beusedwiththis product.
WARNING: Changes or modifications to this unit not expressly approved by
thepartyresponsibleforcompliancecouldvoidthe user's authority to operate
theequipment.
ON / OFF BUTTON: To turn the UPS on: press and hold the
On/Off button until the alarm sounds one beep and then re-
lease. Theninaproximately twenty seconds the UPS will per-
form a five second self-test. Once the UPS has passed its
self-test the UPS will be ready for normal operation. To turn
the UPS off: press and hold the On/Off button until the alarm
sounds one beep and then release.
NOTICE! The output of this device is not sinusoidal. It has a total harmonic
distortionand maximum single harmonic as below:
© COPYRIGHT 2016 BY PARASYSTEMS, INC.
AllRightsReserved.All rightsof thisUserManual(“Manual”), including but not
limitedtothe content, information, and figures are solely ownedand reserved
by Para Systems, Inc. (“Para Systems”). The Manual can only be applied to
the operation or the use of this product.Any disposition, duplication, dissemi-
nation, reproduction, modification, translation, extraction, or usage of this
Manual in whole or in part is prohibited without the prior written permission of
Para Systems. Given that Para Systems will continuously improve and de-
velop the product, changes may be made to the information in this Manual at
any time without obligation to notify any person of such revision or changes.
Para Systems will make all possible efforts to secure the accuracy and the
integrity of this Manual. Para Systems disclaims any kinds or forms of war-
ranty, guarantee, or undertaking, either expressly or implicitly, including but
not limited to the completeness, faultlessness, accuracy, non-infringement,
merchantability or fitness for a particular purpose of the Manual.
Totalharmonic
Model EN350
28% EN550
26%
Singleharmonic 16%20%

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Chapter 2: Controls and Indicators TheAC normal (Green) LED will be on when the UPS is operating in
the normal AC mode and will turn off when the UPS is operating in
theBatterymode.
TheOn-Battery(Yellow)LEDwillturn on when the UPS is operating
inthe Battery mode and will turnoffwhenthe UPS is operating in the
ACnormalmode.
TheWarning/ Fault (Red) LED willturnonwhenthe UPS detects an
internal fault, an Overload, a Weak/Bad/Disconnected Battery or a
LowBattery Warning.TheLED will be offwhen the UPS is operating
normally.
TheOn/OffButtonfunctionsasfollows:
When the UPS is in the Off position, press and hold the On/Off
buttonuntilthe alarm sounds one beep and then release to turnthe
UPSOn.
When the UPS is in the On position, press and hold the On/Off
buttonuntilthe alarm sounds one beep and then release to turnthe
UPS Off.
When the unit is operating in Battery mode, pressing the Alarm
SilencerButtonwill silencetheaudiblealarm. OncetheUPSreaches
the LBW (Low Battery Warning) threshold the alarm will start beep-
ing. The alarm cannot be silenced during the LBW alarm. Once
the UPS transfers back to theAC normal mode the alarm will reset
backtothe default setting.
OutputPower Receptacles
NEMA5-15PW/4ftcord
Model# Input Power Cord
4-NEMA5-15R Battery Backup & Surge
4-NEMA5-15RSurgeOnly
1. Alarm Silencer Button: Silences the alarm during the Battery mode.
2. Battery Backup & Surge output receptacles: Mission critical equipment.
3. Input circuit breaker: Protection against an excessive overload.
4. AC normal (Green) LED.
5. On/Off Button: Turns the UPS On or Off.
6. On-Battery (Yellow) LED.
7. Warning / Fault (Red) LED.
8. Input power cord: Connecting to Utility Power.
9. Surge-only output receptacles: Noncritical equipment.
10.USB Communications Port (EN550 only): UPS monitoring and control.
11.RJ11/45 Single line Phone/Network protection port.
EN350
EN550
NOTE: See the LED andAlarm functions table for more information.
NOTE: With the exceptionoftheOn-BatteryalarmalltheotherWarning/Fault
alarms cannot be silenced. Once the Warning/Fault condition has been cor-
rectedthe alarm will reset to default.

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INSTALLATION
(QUALIFIED SERVICEPERSONNELONLY)
Besure to read the installation placement and all the cautions before installing the
UPS. Place the UPS in the final desired location and complete the rest of the
installationprocedure. These UPSs are shipped with the internalbatteries discon-
nected. The batteries must be connected before putting these UPSs into service.
See Connecting the Battery. The primary installation is the Desktop / Office type.
These UPSs can be wallmounted. The wallmount configuration allows the user to
mountthe UPS on the wall. There is a wallmount kit that comes with the UPS. The
kitincludesthe wallmounttemplate andtwowallmount screws. Seethe Wallmount
Templatefor the wallmountinstallationinstructions.
INSTALLATIONPLACEMENT
ThisUPS series is ONLYintended to be installinan indoortemperature controlled
environmentthat isfree ofconductive contaminants. DONOT operatethe UPSin:
extremelydusty and/or unclean areas, locationsnear heatingdevices, wateror ex-
cessivehumidity,or wherethe UPS is exposed todirect sunlight. Selecta location,
whichwill provide good air circulation for theUPS at all times. Routepower cords
sothey cannot be walked on or damaged. Typicalbattery lifeis 3 to5 years. Envi-
ronmentalfactors do affect battery life. High temperatures, poorutility power, and
frequent, short duration discharges have a negative impact on battery life. This
UPS series is not intended for use in a computer room as defined in the Standard
forthe Protectionof ElectronicComputer/DataProcessing EquipmentANSI/NFPA
75.
Operating Temperature (Maximum): 0 to 40°C (+32 to +104°F)
Operating Elevation: 0 to 3,000m (0 to +10,000 ft)
Operatingand Storage Relative Humidity: 95%, non-condensing
Storage Temperature: -15 to +50°C (+5 to +122°F)
Storage Elevation: 0 to 15,000m (0 to +50,000 ft)
Chapter 3: Installation 4. Verify proper polarity. Connectthe battery positive (Red) wireto the battery
positive(Red) terminal. (FIG 3)
5. Reinstallthebattery.
6. Reinstallthe battery door onto theUPS and slide inward.
7. Continuewiththe restof the Installation.
FIG. 1
FIG. 2
CONNECTING THE BATTERY
(QUALIFIED SERVICEPERSONNELONLY)
Please read all of the WARNINGS and CAUTIONS before attempting to connect
thebattery.
1. Use CAUTION, the UPS is heavy. Remove the UPS from the shipping box
and set upside down on a desk or a bench top.
NOTE: No tools are required for removing or installing the battery door.
2. Graspthe battery door handle and slide thebattery door outward.(FIG. 1)
3. Liftthebattery door upwardsand then removethe battery bypullingthe pull-tab.
(FIG. 2)
FIG. 3

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CHARGING THE BATTERY
TheUPSwill charge theinternal batteries wheneverthe UPS isconnected to anAC
source and there is an acceptableAC voltage present (95 - 140VAC). It is recom-
mendedthat the UPS'sbatteries be chargedfor a minimumof 4 hours before use.
TheUPSmay beused immediately,however,the“On Battery”runtime may beless
thannormally expected. Typicalbattery life is 3 to5 years. Environmental factors
do affect battery life. High temperatures, poor utility power, and frequent, short
duration discharges have a negative impact on battery life. NOTE: If the UPS is
going to be out of service or stored for a prolonged period of time, the batteries
mustbe recharged for at least twenty-four hours every ninety days.
POWER MONITORING SOFTWARE
The EN550 supports Minuteman's SentryHD power monitoring software. Please
gotoourweb site atwww.minutemanups.com/support,thenlook under Downloads,
andthen SoftwareDownload Center. Please download(Free ofCharge) thelatest
versionof the Minuteman SentryHD software.
CONNECTING THE UPS TO AN AC SOURCE
CAUTION- To reducetherisk offire,connect onlytoa utilitypoweredcircuit with20
amperes maximum branch circuit over-current protection in accordance with the
National Electric Code,ANSI/NFPA70. Plug the UPS into a two pole, three wire,
groundedreceptacleonly. DO NOTPLUGTHE UPS INTOEXTENSIONCORDS,
ADAPTER PLUGS, SURGE STRIPS OR POWER STRIPS. DO NOT CUT THE
INPUT PLUG OFFANDATTEMPT TO HARDWIRE THIS UPS, DOING SO WILL
VOIDTHEWARRANTY.
PHONE/FAX/NETWORK PROTECTION CONNECTION (OPTIONAL)
Connect a 10/100 Base-T network, single line phone, or fax line to the RJ11/45
modular connectors on the side panel of the UPS. This connection will require
anotherlengthoftelephone or networkcable. Thecable coming fromthetelephone
serviceor networkedsystem is connected to theport marked“IN”. The equipment
tobe protected isconnected to the port marked "OUT". NOTE: Connecting to the
Phone/Fax/Networkmodularconnectors isoptional. TheUPS worksproperlywith-
outthis connection.
USB COMMUNICATIONS PORT CONNECTION (OPTIONAL)
The EN550 supports USB communications. The power monitoring software and
interface cable can be used with the UPS. Use only the interface cable that come
withthese UPSs. The USBcommunications protocol is HID. The HID USB driver
comes standard in the Windows OS. Simply connect the USB cable to the USB
communications port on the side panel of the UPS. Connect the other end of the
USBcable tothe devicethat will be monitoring/controlling theUPS andthen follow
theprompts on thescreen. NOTE: When usingthe UPS'sUSB portwith Windows
XP, 7, 8 or 10 the Power Options in the Control Panel may need to be configured.
Connectingto the Communications Port is optional. The UPS works properly with-
outthis connection.
SYSTEM OVERVIEW
This Standby UPS protects computers, servers, telecom systems, VoIPsystems,
securitysystems, and avariety ofelectronic equipmentfrom blackouts, brownouts,
overvoltages, and surges. During normalAC operation, the UPS will quietly and
confidentlyprotect yoursystem from power anomalies.
The UPS will charge the batteries with the UPS in the on or off position as long as
theUPSispluggedintothewall outlet andthereisanacceptableACvoltagepresent
(95 - 140VAC). When a blackout, brownout, or an overvoltage condition occurs;
theUPSwill transfer tothebattery mode,theOn Batteryindicatorwill illuminate and
theaudiblealarm willsoundonce everyfiveseconds indicatingthatthe commercial
power is lost or unacceptable. When the commercial power returns or is at an
acceptable level, the UPS will automatically transfer back to theAC normal mode
and start recharging the batteries. During an extended outage when there is ap-
proximately two minutes of backup time remaining the audible alarm will sound
twiceevery fiveseconds. This Low Battery Warningisinforming the user thatthey
shouldsave all open files, turnoff their computerand then turn off theUPS. When
the batteries reach the predetermined level the UPS will automatically shutdown
protecting the batteries from over discharging. Once the commercial power re-
turns the UPS will automatically restart, providing safe usable power to the con-
nectedequipment and startrecharging the batteries.
Chapter 4: Operation
CONNECTING YOUR EQUIPMENT
Plugthe mission criticalequipment into the Battery Backup & Surgeoutput recep-
tacles on the top panel of the UPS. Plug the noncritical equipment into the Surge
Only output receptacles on the top panel of the UPS. Ensure that the connected
equipment does not exceed the maximum output rating of the UPS (refer to the
information label on the UPS or the electrical specifications in this manual). DO
NOT PLUG EXTENSION CORDS, ADAPTER PLUGS, SURGE STRIPS OR
POWER STRIPS INTO THE OUTPUT RECEPTACLES OF THE UPS, there is a
risk of damaging the UPS and/or connected equipment. CAUTION! DO NOT
connecta laser printer, copier, vacuum cleaner or anyother large electricaldevice
intothe outputof the UPS.
Block Diagram of the Basic Wiring and Internal Circuit Configuration

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ACMode
AudibleAlarm
OFF
Description ACNormal
(Green) LED On-Battery
(Yellow)LED
OFF
Warning / Fault
(Red) LED
OFF
ON
BatteryMode 1-Beep every
5-seconds
OFF
OFF
LowBattery
Warning 2-Beeps every
5-seconds
ON ON
OFF
OverloadAC
Mode 1-Beep every
0.5-seconds
OFF ON
ON
ON
Overload
BatteryMode 1-Beep every
0.5-seconds
ON ON
OFF
Weak / Bad /
Disconnected
Battery
3-Beepsevery
5-minutes
OFF(AC Mode) ON(AC Mode)
ON(AC Mode)
InternalFault Constant
Beeping
OFF ON
OFF
The unit is off,
pluggedinto
thewalloutlet
and charging
thebattery
OFF
OFF OFF
OFF
LED andALARM FUNCTIONS WEAK / BAD / DISCONNECTED BATTERY
TheUPS automatically tests the battery’s condition. If thebatteryisweak,bad
or disconnected, the Warning/Fault LED will turn on and the alarm will sound
three beeps every five minutes until the battery is either reconnected, re-
placedor passes a self-test. The audible alarm cannot be silenced during the
Weak/Bad/Disconnected Battery alarm. It is recommended that the UPS be
allowed to charge overnight before performing a battery test to confirm a
Weak/Bad Battery condition.
OVERLOAD
When the amount of load attached to the UPS exceeds its power rating, the
Warning/FaultLED will turn on and the alarm will sound one beep every half a
second (AC and Battery modes). This alarm will remain on until the excess
loadisremovedortheUPS’sselfprotectioncircuitshutstheUPSdown. Ifthe
UPS has shutdown, remove part of the load and then press the On/Off button
toturn the UPS on. The audible alarm cannot be silenced during the Overload
alarm.
ALARMS
BATTERYMODE
When the UPS is operating in the Battery mode, theAC normal LED will turn
off, the On-Battery LED will turn on and the alarm will sound one beep every
five seconds. Once the UPS returns to the normal AC mode, the alarm will
stop, the On-Battery LED will turn off and theAC normal LED will turn on.
LOW BATTERYWARNING
Whenthebatteries reach the predetermined level, the Warning/FaultLED will
turn on and the alarm will sound two beeps every five seconds. The audible
alarm cannot be silenced during the LBW alarm. This information is to inform
the user that there is approximately two minutes of runtime remaining before
theUPSshutsdown. This condition willcontinueuntileitherAC returns or the
UPS’s self protection circuit shuts the UPS down to protect the battery from
over discharging.
UPS FAULT
When the UPS detects an internal fault, the Warning/Fault LED will turn on
and the alarm will sound continuously and the output will be turned off. The
audiblealarmcannot be silenced during the Fault alarm.The fault condition, in
some instances, may be cleared by turning the UPS off and then back on
again. IfthefaultconditiondoesnotcleartheUPSmustbesentinforservice.
SeetheTroubleshootingsection.
TURNING THE UPS ON / OFF
To turn the UPS on: press and hold the On/Off button until the alarm sounds
onebeep and then release. Theninaproximately twenty seconds theUPSwill
perform a five second self-test. Once the UPS has passed its self-test the
UPS will be ready for normal operation. To turn the UPS off: press and hold
theOn/Off button until the alarm soundsonebeepand then release. The UPS
will continue to charge the batteries whenever it is plugged into a wall outlet
and there is an acceptableAC voltage present (95 - 140VAC).
ALARM SILENCER BUTTON
When the unit is operating in Battery mode, pressing theAlarm Silencer But-
ton will silence the audible alarm. Once the UPS reaches the LBW (Low
Battery Warning) threshold the alarm will start beeping. The alarm cannot be
silenced during the LBW alarm or any fault condition. Once the UPS trans-
fers to theAC mode the alarm will be reset to default.
OFF(Unitoff,
butplugged in) OFF(Unit off, butplugged in) ON(Unitoff, butplugged in)

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Chapter 5: Troubleshooting
Symptom / Error Code Cause / What To Do
Pressthe On/Off button and release afteronebeep.
UPS will not turn on.
Reset the input circuit breaker by pressing the
plunger back in. If the input circuit breaker trips af-
ter the UPS restarts, reduce the load on the UPS.
UPSoperatesinbattery
modeonly,eventhough
there isAC present.
The AC normal LED is
illuminated,but thereis
nooutput.
Disconnectthecomputercable from the UPS, press
the On/Off button. If UPS works normally, the soft-
ware had control of the UPS.
Charge the batteries for 8-hours and retest. If the
runtimeisstilllessthanexpected,thebatteriesmay
need to be replaced.
UPS does not provide
expectedruntime.
The UPS has an internal problem. Call for service.
The Warning / Fault
LED is illuminated and
the alarm is sounding
continuously.
The Warning / Fault
LED is illuminated and
the alarm is sounding
1-beep every 0.5 sec-
onds.
Checkthe specificationsand removepartof theload.
If the UPS shuts down because of an Overload, re-
movepart of the load and then press the On/Off button
toturn theUPS on.
The Warning / Fault
LED is illuminated and
the alarm is sounding
3-beeps every 5 min-
utes.
Check the battery connections, charge the batteries
for 8-hours and retest, or replace the batteries.
Low Battery Warning. TheUPS's battery reserve is low. This condition will
continueuntilACreturns ortheUPS shutsdown from
batteryexhaustion.
REPLACING THE BATTERY
WARNING! This UPS contains potentially hazardous voltages. Do not at-
tempt to disassemble the UPS beyond the battery replacement procedure.
This UPS contains no user serviceable parts. Repairs and battery replace-
ment must be performed by QUALIFIED SERVICE PERSONNEL ONLY.
CAUTION: Donotopenormutilatebatteries. Released electrolyte is harmful
to the skin and eyes and may be toxic.
(QUALIFIEDSERVICEPERSONNELONLY)
CAUTION: Do not dispose of batteries in a fire. The batteries may explode.
The batteries in this UPS are recyclable. Dispose of the batteries properly.
The batteries contain lead and pose a hazard to the environment and human
health if not disposed of properly. Refer to local codes for proper disposal
requirements or return the battery to the supplier.
CAUTION: The battery system can present a risk of electrical shock. These
batteries produce sufficient current to burn wire or tools very rapidly, produc-
ingmoltenmetal. Observetheseprecautions when replacing the batteries:
1. Remove watches, rings, or other metal objects.
2. Use handtoolswithinsulated handles.
3. Wear protective eye gear (goggles), rubber gloves and boots.
4. Do not lay tools or other metal parts on top of batteries.
5. Disconnect the charging source prior to connecting or disconnecting the
batteryterminals.
6. Determineif the battery is inadvertently grounded. If the battery is, remove
the source of the grounding. Contact with any part of a grounded battery
can result in an electrical shock. The likelihood of such shock will be redu-
ced, if such grounds are removed during installation and maintenance.
Please read all of the WARNINGS and CAUTIONS before attempting to ser-
vice the batteries. Typical battery life is 3 to 5 years. Environmental factors
do affect battery life. High temperatures, poor utility power, and frequent,
short duration discharges have a negative impact on battery life.
Chapter 6: Replacing the Battery
CAUTION: Replacethebatterieswiththesamenumberandtypeasoriginally
installed in the UPS. These batteries have pressure operated vents. These
UPSscontainsealednon-spillablemaintenance-freelead acid batteries.
BatteryModule
Part #
Model# EN350
BM0067
EN550

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7. Liftthe battery doorupwards, removethe batterymodule by pullingthe pull-tab,
andthen set aside . (FIG. 2)
CAUTION: DO NOT pull the battery module out by pulling on the battery
wires.
8. Disconnect the battery positive (Red) wire. (FIG. 3)
9. Disconnect thebatterynegative(Black) wire and set the oldbatterymodule
aside. (FIG. 3)
CAUTION: Do not short the battery positive wire to the battery negative wire.
10.Verify proper polarity. Connect the battery negative (Black)wire to thebattery
negative(Black) terminalon the new battery module.(FIG 3)
11. Verify proper polarity. Connectthe batterypositive (Red) wire to the battery
positive(Red) terminalon the newbattery module. (FIG 3)
BATTERYREPLACEMENT PROCEDURE
(QUALIFIEDSERVICEPERSONNELONLY)
PLEASE READ THE CAUTIONSAND WARNINGS BEFOREATTEMPTING
TO REPLACE THE BATTERYMODULE.
Hot-swappablebatteries meanthatthe battery modulecanbe replacedwithout
poweringdown the whole UPS system.
NOTE: If there is a power interruption while replacing the hot-swappable
battery module, with the UPS on, the load will not be backed up. To hot-swap
thebatterymodule start with step number 6.
1. Turn off the equipment that is plugged into the output of the UPS.
2. Turn off the UPS.
3. Unplug the UPS'sAC power cord from theAC wall outlet.
4. Unplug the equipment from the output receptacles of theUPS.
5. Unplug the computer interface cable from the side panel of the UPS.
NOTE: No tools are required for removing or installing the battery door.
6. Graspthe battery door handle and slide the battery door outward. (FIG. 1)
FIG. 1
FIG. 2
FIG. 3
12.Slide the new battery module into the UPS.
13.Reinstall the battery door on the UPS.
NOTE: Some sparking might occur this is normal.
14.Properly dispose of the old battery module at an appropriate recycling
facility or return them to the supplier in the packing material for the new
batterymodule.
15.The UPS is now ready for the normal operation.
NOTE: If the UPS has a Weak/Bad BatteryAlarm after replacing the battery
module,a battery testmustbe performed to cleartheWeak/BadBatteryAlarm.
A battery test can be performed by using the software or by disconnecting the
power cord from the wall outlet for 10-seconds and then reconnecting the
power cord back to the wall outlet.

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IF THE UPS REQUIRES SERVICE
Chapter 7: Obtaining Service
1. Use theTroubleshootingsection to eliminate obvious causes.
2. Verify there are no tripped circuit breakers and that the batteries are good.
A tripped circuit breaker and defective batteries are the most common iss-
ues.
3. Call your dealer for assistance. If you cannot reach your dealer, or if they
cannotresolve the issue callorfaxtheTechnicalSupport departmentat the
following numbers; Voice phone [phone], FAX line [phone]
or visit our Web site at www.minutemanups.com the "Discussion Board".
Before calling the Technical Support Department have the following infor-
mationavailable:
a) Contact name and address.
b) Where and when the unit was purchased.
c) All of the model information about your unit.
d) The serial number of your unit.
e) Any information on the failure, including LEDs that may be illuminated
or error codes displayed.
f) A description of the protected equipment including model numbers, if
possible.
g) A technician will ask you for the above information and if possible,
helpsolve the issue over the phone. In the event thattheunitrequires
factoryservice,theTechnical Support Representativewillissueyoua
Return MaterialAuthorization Number (RMA#). NOTE: We must
have the model number and the serial number of the product to
issue an RMA #.
h) If the unit is under warranty, the repairs will be done at no charge. If
the unit is not under warranty there will be a charge for the repair.
4. Pack the unit in its original packaging. If the original packaging is no lon-
geravailable,asktheTechnicalSupport Representative about obtaininga
new set. It is important to pack the unit properly in order to avoid damage
in transit. Never use Styrofoam beads for a packing material.
a) Include a letter with your name, address, day time phone number,
RMAnumber, a copy of your original sales receipt, and a brief desc-
ription of the problem.
5. MarktheRMA#onthe outside of all packages. The factory cannot accept
any package without the RMA # marked on the outside of the package.
6. Return the unit by insured, prepaid carrier to:
Para Systems Inc.
MINUTEMANUPS
1809 W. Frankford Road, Suite 150
Carrollton,TX 75007
ATTN: RMA#_______
120VAC
Protection
WaveformType
Over-Current,Short-Circuit Protected andLatching Shutdown
SimulatedSine Wave
Frequency 60Hz, +/-0.5Hz (unless synchronized to utility)
NominalVoltage
MaximumPower Capacity
6 ms Typical
>96%(Full Load)
ResettableCircuit Breaker
60 Hz, +/-6Hz
0- 150VAC
95- 140VAC
95- 140VAC
TransferTime
Efficiency(Line Mode)
InputProtection
FrequencyLimits
VoltageRange
AcceptableInput voltage
ModelNumber
SYSTEMSPECIFICATIONS
VoltageRange
Topology Standby,SimulatedSine Wave
OUTPUT NON-BATTERY OPERATION
INPUT
Numberof Phase Single (1∅2W +G)
NominalVoltage 120VAC
LowVoltageTransferPoint 95V resets to Utility Power at 99V or higher
HighVoltageTransferPoint 140V resets to Utility Power at 136V or lower
VoltageRegulation 120VAC: -20.8% - +16.7%
FrequencyRange 60Hz: 54 - 66Hz
OUTPUT BATTERY OPERATION
VoltageRegulation +/-5% (until Low Battery Warning)
OverloadCapacity AC Mode: 105% for 1-minute then shutdown, 115% Shutdown Immediately
EN550
550VA
300W
REGULATORYCOMPLIANCE
SafetyandApprovals cTUVus (Conforms toUL1778 5th Edition& CSA22.2no. 107.3-
14 / R: 2014), FCC Class B, CE certified, RoHS2 (EU Directive
2011/65/EU&2015/863/EU)
EN350
350VA
200W
DC Mode: 105% for 20-seconds then shutdown, 115% Shutdown Immediately
Chapter 8: Specifications

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20
BATTERYSYSTEM
TypicalRechargeTime
Typical BatteryLife 3 to 5 years. Environmental factors do affect battery life. High
temperatures, poor utility power, and frequent, short duration
discharges have a negative impact on battery life.
8-hours to 90% capacity from a full load discharge
BatteryType Sealed,Non-Spillable, MaintenanceFree,Value RegulatedLeadAcid
Runtime:Half Load(minutes)
Runtime:Full Load(minutes)
SURGE PROTECTIONAND FILTERING
Audible Noise at 1 m (3 ft.)
NoiseFilter
Surgevoltage let-through (asa
percentageof anappliedANSI
C62.41 Cat.A+/-6 kV)
SurgeResponseTime
SurgeCurrent Capability
SurgeEnergy Rating 500J
0 ns (instantaneous) normal mode; <5 ns common mode
< 14%
>45dbnormal andcommon modeEMI/RFI suppression
<45 dBA
10000Amps total(one time 8 to 20us waveform)
PHYSICAL
Weight - Net
Size - Net
L X W X H
Size - Shipping
L X W X H
Weight- Shipping
12.4 x 5.1 x 3.7"
316 x 130 x 94 mm
14.7 x 5.6 x 8.3"
374 x 143 x 210 mm
6.4 lbs
2.9 Kgs
7.0 lbs
3.2 Kgs
ENVIRONMENTAL
Operating/Storage Humidity 0-95% Non-Condensing
Storage Elevation 0 to 15,000m (0 to +50,000 ft)
StorageTemperature -15 to +45°C (+5 to +113°F)
OperatingTemperature
6.2 lbs
2.8 Kgs
6.8 lbs
3.1 Kgs
3
11
3
12
Battery Module Part # BM0067
OperatingElevation 0 to 40°C (+32 to +104°F)
0 to 3000m (0 to +10,000 ft)
OutputReceptacles
NEMA 5-15P W/4 ft cord
PowerCord
4 - NEMA 5-15R Battery Backup & Surge
4- NEMA5-15R Surge Only
ParaSystems,Inc.(ParaSystems)warrantsthisequipment,whenproperlyapplied and
operatedwithinspecifiedconditions,againstfaultymaterials(excludingthebatteries)or
workmanshipfor a periodof three yearsfrom the dateof purchase. Para SystemsInc.
(Para Systems) warrants the batteries for a period of two years from the date of pur-
chase. Forequipment sites within theUnited StatesandCanada,this warranty covers
depot repair or replacement of defective equipment at the discretion of Para Systems.
Depotrepairwillbe from the nearest authorized service center. Thecustomer paysfor
shipping the product to Para Systems. Para Systems pays ground freight to ship the
product back to the customer. Replacement parts and warranty labor will be borne by
Para Systems. For equipment located outside of the United States and Canada, Para
Systems only covers faulty parts. Para Systems products that are depot repaired or
replaced pursuant to this warranty shall only be warranted for the unexpired portion of
the warranty applying to the original product. This warranty applies only to the original
purchaserwho must have properlyregistered the product within10 days of purchase.
Thewarranty shall be voidif (a) the equipment is damaged bythe customer,isimprop-
erlyused, is subjected to anadverse operating environment, or is operated outside the
limitsofitselectricalspecifications; (b) the equipment is repaired ormodifiedbyanyone
otherthanParaSystems or Para Systems approved personnel; or(c)has been used in
amanner contrary to the product’s User's Manual or other written instructions.
Anytechnical advice furnished before orafter delivery in regardto use or application of
ParaSystems’equipmentisfurnishedwithoutchargeandonthebasis that it represents
Para Systems’ best judgment under the circumstances, but it is used at the recipient’s
solerisk.
EXCEPTAS PROVIDED HEREIN, PARASYSTEMS MAKESNO WARRANTIES,EX-
PRESSEDORIMPLIED,INCLUDINGWARRANTIESOFMERCHANTABILITYANDFIT-
NESSFORAPARTICULARPURPOSE. Somestatesdonotpermitlimitationof implied
warranties;therefore,the aforesaid limitation(s)maynot apply to the purchaser.
EXCEPTAS PROVIDED ABOVE, IN NO EVENT WILL PARASYSTEMS BE LIABLE
FORDIRECT,INDIRECT,SPECIAL,INCIDENTAL,OR CONSEQUENTIALDAMAGES
ARISINGOUTOFTHE USE OF THIS PRODUCT, EVEN IFADVISEDOFTHE POSSI-
BILITYOFSUCHDAMAGE. Specifically,ParaSystemsisnotliableforanycosts,such
as; labor for on-site installation, on-site maintenance or on-site service, lost profits or
revenue,lossofequipment,lossofuseofequipment,lossofsoftware,lossofdata,cost
ofsubstitutes, claims by third parties, or otherwise. The sole and exclusive remedy for
breachof any warranty, expressed or implied,concerning Para Systems’productsand
theonly obligation of Para Systems hereunder, shall be depot repairorreplacement of
defective equipment, components, or parts; or, at Para Systems’ option, refund of the
purchase price or substitution with an equivalent replacement product. This warranty
givesyouspecific legal rights and youmay also have other rightswhich vary from state
tostate.
No employee, salesman, or agent of Para Systems is authorized to add to or vary the
terms of this warranty.
Chapter 9: Limited Product Warranty

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22
A1. DECLARATION OF CONFORMITY
Application of Council Directive(s): 2004/108/EC, 2006/95/EC, cTUVus (for
UL1778)
Standard(s) to which Conformity is declared: EN61000-3-2, EN61000-3-3,
EN62040-2, IEC61000-2-2 IEC61000-4-2, IEC61000-4-3, IEC61000-4-4,
IEC61000-4-5, IEC61000-4-6, IEC61000-4-8, IEEE C62.41 Category A1,
UL1778, CSA 22.2 no. 107.3-14 / R: 2014, FCC Class B
Manufacturer’s Name: Para Systems, Inc. (MINUTEMAN UPS)
Manufacturer’sAddress: 1455LeMay Drive
Carrollton,Texas75007 USA
Type of Equipment: Uninterruptible Power Supplies (UPS)
Model No: EN350, EN550
I hereby declare that the equipment specified above conforms to the above
Directive(s).
Place:Carrollton,Texas,USA Date: July 1, 2016
RobertCalhoun
(Name) ManagerEngineering
(Position)
Year of Manufacture: Beginning July 1, 2016
Notes:

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Notes:Notes: