NXT Power NPTU250-GL-N User manual

NXT Power Desktop UPS
User Manual
250 / 400 VA
NPTU250-GL-N
NPTU400-GL-N

Table of Contents
1. Safety Instructions and Storage/ Battery Care ..................................................... 1
2. UPS System Block Diagram .................................................................................... 1
3. Front Panel Display ................................................................................................. 1
4. Product Features...................................................................................................... 2
5. Button Function ....................................................................................................... 2
6. Installation and Power On ....................................................................................... 2
7. Alarms and Status Icons ......................................................................................... 3
8. Specifications ........................................................................................................... 3
9. 24VDC 3A Output Installation ................................................................................. 4
10. Battery Replacement Procedure .......................................................................... 4

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1. Safety Instructions and Storage/ Battery Care
SAVE THESE INSTRUCTIONS. - This manual contains important instructions that should be followed during installation and
maintenance of the UPS and batteries.
Read the instructions carefully to become familiar with the equipment before starting the install.
Notify the carrier and dealer if there is any damage.
 Adhere to all national and local electrical codes.
 This UPS is intended for indoor use only.
 Do not operate this UPS in direct sunlight, in contact with liquids, or where there is excessive dust or humidity.
 Be sure the air vents on the UPS are not blocked. Allow adequate space for proper ventilation. Keep rear panel a minimum of 8 inches
(20cm) from any obstructions.
 For a UPS with a factory installed power cord, connect the UPS power cable directly to a wall outlet. Do not use surge protectors or
extension cords.
 The battery typically lasts for three to five years. Environmental factors will impact battery life. Elevated ambient temperatures, poor quality
utility power, and frequent short duration discharges will shorten battery life.
 The equipment and batteries are heavy. Remove the batteries before installing the UPS and practice safe lifting techniques adequate for
the weight of the equipment.
 Before installing or servicing the equipment check that the Disconnecting from the AC mains and load. The UPS contains internal batteries
and may present a shock hazard even when disconnected from the branch circuit (mains).
 Doing wiring, maintenance service and batteries replacement should be performed or supervised by personnel knowledgeable about
batteries and the required precautions.
 When replacing batteries, replace with the same type and number of batteries or battery packs.
 CAUTION: Do not dispose of batteries into fire. The batteries may explode.
 CAUTION: Do not open or mutilate batteries. Released electrolyte is harmful to the skin, eyes, and may be toxic.
 CAUTION: A battery can present a risk of electrical shock and high short-circuit current through conductive materials could cause severe
burns. The following precautions should be observed when working on batteries:
Before installing or replacing the batteries, remove jewelry such as wristwatches and rings, or other metal objects.
When working on batteries should wear rubber gloves and boots. Also, must use tools with insulated handles, and do not lay tools or metal
parts on top of batteries.
Remove battery grounds during installation and maintenance to reduce likelihood of shock. Remove the connection from ground if any
part of the battery is determined to be grounded.
2. UPS System Block Diagram
3. Front Panel Display
LCD
Status
1. AC mains mode
2. Battery/inverter mode
3. Automatic Voltage Regulation (Buck or Boost)
4. Battery capacity
5. Load capacity
6. UPS status
7. Power ON/OFF button

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4. Product Features
NPTU250-GL-N
NPTU400
-
GL
-
N
A: Wiring Fault
B: USB Port
C: DC 24V Output
D: AC Power Cord
E: Input Breaker
F: AC Outlet
G: Intelligent Slot (Optional)
5. Button Function
Status
Action
Description
LCD Display
Power ON
Press the on/off button for 5~8 seconds,
release the button when the alarm sounds
The UPS will now turn on.
The (2) icons highlighted in red will flash
Power OFF
Press the on/off button for 5~8 seconds,
release the button when the alarm sounds
The UPS will now turn off.
The (2) icons highlighted in red will flash
Alarm silence
When the UPS is in an abnormal state, the
alarm will sound. Press on/off button for ½
second (Do not hold the button longer that
1 second). This will silence the alarm
Self-Test
(With the UPS in AC mains operation)
press the on/off button for 1~2 seconds,
release the button when the alarm sounds
a short beep. The UPS will perform a self-
test.
The icon highlighted in red will flash
To clear the error icon
Hold down the on/off button for 5~8
seconds, release the button when the
alarm beeps. The error icon will be
removed.
6. Installation and Power On
1. Installation:
 Please read Section 1. Safety Instructions and Storage/ Battery Care before installing.
2. Connect equipment to the UPS. Avoid using extension cords.
 Do NOT connect printers, heaters, or copiers to the UPS.
 During a power outage or other AC problems, the AC outlets receive power for a limited time from
the UPS.
ABG
F
C
E
D

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 Press the ON/OFF button for 5~8 seconds to turn the unit on.
 The UPS should charge the battery for at least 6 hours to ensure sufficient runtime.
 Press ON/OFF button in 5~8 seconds. The alarm sounds to confirms that the UPS is on and provide
power to outlets.
3. Cold start the UPS
 Use cold start feature to supply power to connected equipment from the UPS batteries when there is no
utility power. To turn on the UPS see step 2 above.
4. Connect and install management software
 UPS is provided with management software for unattended system shutdown, UPS monitoring, and UPS
configuration.
7. Audible Indicators and Status Icons
If the UPS
…
Possible cause...
In Battery Mode: Alarm sounds every 2 seconds.
(alarm for 0.5 second and stops for 1.5 seconds)
UPS is running on battery. You should consider saving any work in
progress.
a. Low Battery: alarm sounds every 0.2 seconds
b. Low Battery power off: Continuous alarm
Low battery condition and battery run-time is very low. Promptly save
any work in progress, exit all open applications, and shut down the
operating system.
Continuous tone with flashing. UPS is overloaded.
Continuous tone with illuminated.
a. Press ON/OFF button one time to mute the alarm.
b. Continuous tone will persist until battery LOW.
(<11Vdc each battery)
: Inverter short
: Inverter over voltage
: Transformer over temperature
: DC power output short circuit
Battery Replacement Alarm: alarms every 4 seconds (alarms
for
1 second and stop
s for
3 seconds)
The battery is near the end of useful life or damaged and should be
replaced.
8. Specifications
Model NPTU250-GL-N NPTU400-GL-N
Input
Voltage range 120VAC
Voltage range 96-144Vac (±5Vac)
Connection NEMA5-15P
Frequency 60 Hz
Output
UPS Capacity (total) 250VA / 200W 400VA / 320W
Rated Voltage 120VAC
Transfer time Typical 2 - 6 ms
Waveform Pure sine wave
DC
Power
Output Voltage 24VDC
Output Current 3A (max)
Physical
Dimension
(
D x W x H
)
12 x 5.9 x 10.5 inch
304.8 x 149.9 x 266.7 mm
Net Weight 38.6 lb
17.5 kg
Packaging
Dimension
(D x W x H)
16.1 x 9.8 x 15.5 inch
408.9 x 248.92 x 393.7 mm
Gross Weight 41.9 lb
19 kg
Environm
ent
Operating
temperature
32 - 104 °F (0 - 40 °C)
Humidity Operating Humidity: 5% to 90%
Noise level <40dB, convection cooling

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9. 24VDC 3A Output Installation
Must use external wires or CL2 equivalent wire. The wire diameter which not less than 22AWG can be used, and the length must be less than
3.0 meter (10ft). Insure positive is connected to (+) and negative is connected to (-) as marked on the UPS.
10. Battery Replacement Procedure
Qualified Service Personnel Only
PLEASE READ ALL OF THE CAUTIONS AND WARNINGS BEFORE ATTEMPING TO REPLACE THE BATTERY MODULE
Warning: Lead-acid battery could be drained and damaged by long-term self-discharge naturally without maintenance.
Step1 Step2 Step3
Recycling the Used battery
Contact your local recycling or hazardous waste center for information on proper disposal of the used battery.
Battery safety assembly:
1. Please tear off the double-sided tape.
2. Please install the cover in battery negative
connector (black).

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