American Power Conversion 250-450 User Manual
APC PowerStack 250/450
Uninterruptible Power Supply User’s Manual
To obtain warranty coverage, please fill out and return the warranty registration card now.
Inspect the APC PowerStack 250/450 Uninterruptible Power Supply (UPS) upon receipt. Notify the carrier and dealer if there is damage. The packaging is recyclable; save it for reuse or dispose of it properly.
Before beginning installation of the UPS, please follow the Battery Connection instructions on the front of the unit, or follow the steps under Replacing the Battery Pack.
Warning! Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the warranty.
The UPS comes with standard 19" (46.5 cm) rack mount brackets. It is supplied with four (4) screws to attach the mounting brackets (ears) to the chassis.
Select a rack location with adequate air flow that is free from excessive dust. Ensure that the air vents on the sides of the UPS are not blocked. Do not operate the UPS where temperature or humidity are outside the limits in the Specifications section of this manual.
The brackets on the UPS can be rotated 90 ° for wall mounting. Remove the screws, rotate the brackets, and insert the screws in the appropriate holes.
The illustrations above show the proper positions for wall mounting the unit
Do not mount the unit on the wall as shown in the illustrations at left. Doing so could result in a safety hazard.
Once the UPS is mounted, please follow the installation instructions in the
This UPS is provided with four
The recommended placement of the feet is shown by a small + on the bottom corners of the unit:
Check the Site Wiring Fault Indicator
Caution! If the site wiring fault indicator lights, get a qualified electrician to correct the building wiring.
Computer Interface Port
The interface port is used for communicating with the UPS. See enclosed documentation for details.
Connect the Battery Pack
The UPS is shipped with the battery pack disconnected. To connect the battery pack, follow the procedure in Replacing the Battery Pack, below.
Charge the battery pack
The UPS charges its battery pack whenever it is connected to utility power. The battery pack will charge fully during the first 4 hours of normal operation. Do not expect full battery
Switch On — Switch Off
With the UPS plugged in, press and release the on/off/test button to supply power to the loads.
The loads are immediately powered while the UPS performs a
The UPS performs a
If the UPS turns off during the
The loads are not affected by a failed test. Recharge the battery pack overnight and perform the
When the UPS is operating
If the battery pack fails a
The UPS repeats the alarm every five hours. Perform the
Note: Cold start is not a normal operating condition.
When the UPS is off and there is no utility power, it is possible to cold start the UPS to power the loads from the UPS’s battery pack.
· Press and hold the on/off/test button until the UPS emits a constant tone.
·Release the on/off/test button during the tone to start the UPS.
When loads exceed the UPS’s capacity, the red overload LED illuminates and the UPS emits a sustained tone. The alarm remains on until the overload is removed. Disconnect nonessential load equipment from the UPS to eliminate the overload.
If the overload is severe, the input circuit breaker may trip (the resettable center plunger of the circuit breaker pops out). Disconnect nonessential load equipment from the UPS to eliminate the overload and press the plunger back in.
If there is AC power and the circuit breaker does not trip during overload, the loads are still powered. If the circuit breaker trips or the UPS attempts to transfer to battery, the loads’power will be shut off. Turn the UPS off then back on to power the loads.
Before storing, charge the UPS for at least 8 hours. Cover the UPS and store it lying flat in a cool, dry location, with its battery pack fully charged.
At +30 to +45 °C (+86 to +113°F), charge the UPS’s battery pack every 3 months.
Replacing the Battery Pack
This UPS has an easy to replace
Note: Please read the cautions in the APC Safety Guide.
See your dealer or call the number in this manual for information on replacement battery pack kits. For 250 models, order RBC17. For 450 models, orderRBC18.
Battery Pack Replacement Procedure
Battery pack replacement is a safe procedure, isolated from electrical hazards. You may leave the UPS and loads on for the following procedure.
·Once the battery pack is disconnected, the loads are not protected from power outages.
·Be careful removing the batteries - they are heavy.
·Small sparks at the battery connectors are normal during connection.
1.Reach into the finger pull and remove the front cover.
3.Grasp the clear plastic tab and gently pull the battery pack out of the UPS until the battery connector is visible.
Warning! Do not force the battery pack out. This may damage internal wiring!
4.Disconnect the battery connector by gripping both sides of the connector and firmly pulling them apart.
5.Slide the battery pack out of the UPS.
6.Slide the new battery pack
7.Connect the battery connector attached to the unit to the connector attached to the new battery pack.
8.Push the battery pack in as far as it will go. There are stops in the back to prevent it from going too far.
9.Close the battery door, turn the battery compartment screws ¼ turn clockwise, and replace the front cover.
10.Dispose of the old battery pack properly at an appropriate recycling facility or return it to the supplier in the packing material for the new battery pack. See the new battery pack instructions for more information.
Acceptable input voltage
0 - 160 VAC
Input Over Current Protection
Resettable circuit breaker
47 - 63 Hz
4 ms typical, blackout response time
250 VA 165 W
450 VA 280 W
60 Hz, ±0.1 Hz; unless synchronized to utility
Output Over Current Protection
shutdown on overload
Spill proof, maintenance free, sealed
Typical battery life
3 to 6 years, depending on number of discharge
cycles and ambient temperature
Typical recharge time
4 to 8 hours from total discharge
0 to +40 °C (+32 to +104 °F)
Operating and storage relative humidity
5 to 95%,
0 to +3,000 m (0 to +10,000 ft)
0 to +15,000 m (0 to +50,000 ft)
Audible noise at 1 m (3 ft)
Size (H x W x D)
1.75 x 17.5 x 13.0 in.
Weight - net (shipping)
18.5 (23) lbs
21.5 (26) lbs
Safety and approvals
UL1778, CSA 107.1
FCC Part 15 Class A, VCCI Class A
LEDs and Audible Alarms
UPS is on
UPS is running on battery
UPS is performing
Output short circuit
Low Battery (while on battery)
Replace battery condition
Battery disconnected in self test
UPS internal alarms:
transfer relay weld
— = irrelevant to condition
= sustained tone
m = on steady
= 1 minute of beeping every 5 hours
X = flashing
= fading tone
= 4 beeps every 30 seconds
If the UPS requires service do not return it to the dealer! Follow these steps:
1.Use the Troubleshooting section of theQuick Reference Guide to eliminate common problems.
2.Verify that no circuit breakers are tripped. A tripped circuit breaker is the most common UPS problem!
3.If the problem persists, call customer service or visit the APC Internet Website (www.apcc.com).
4.Note the model number of the UPS, the serial number, and the date purchased. A technician will ask you to describe the problem and try to solve it over the phone, if possible. If this is not possible the technician will issue a Return Merchandise Authorization Number (RMA#).
5.If the UPS is under warranty, repairs are free. If not, there is a repair charge.
6.Disconnect the batteries before packing the UPS.
7.Pack the UPS in its original packaging. If the original packing is not available, ask customer service about obtaining a new set.
8.Pack the UPS properly to avoid damage in transit. Never use Styrofoam beads for packaging. Damage sustained in transit is not covered under warranty.
9.Include a letter with your name, RMA#, address, copy of the sales receipt, description of the trouble, your daytime phone number, and a check (if necessary).
10.Mark the RMA# on the outside of the package.
11.Return the UPS by insured, prepaid carrier to the address given to you by Customer Service.
North & Latin America
132 Fairgrounds Road
Ballybritt Business Park
West Kingston, Rhode Island 02892
of Ireland only
North America: firstname.lastname@example.org
Latin America: email@example.com