Niveo Professional NUPS20-3 - Manual (Page 8)

3. AC Utility Failure
If AC utility fails, the UPS quickly detects the problem and activates the
inverter. The inverter. The DC/AC inverter changes DC power from the
batteries into AC and provides continuous uninterruptible power to load.
AVR.
INV.
CHA.
N.F. N.F.
INPUT OUTPUT
Fig. 3 shows how the UPS works when AC Utility Failure
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BATTERY FACTS
The battery is the only periodically serviceable parts in the UPS. An
expected life is approx. 3
 5 years. However, frequent long discharges or
ambient temperatures above 80  F will shorten battery life. Therefore, it is
recommended to replace the batteries every 3 years after initiating the unit.
Recharge batteries every 3 months is necessary if it is not in use because it
may cause batteries over-drain.
WARNING
Only a qualified technician should replace the battery. Batteries have
high short-circuit current capacity; mistakes in connecting or
disconnecting can cause connections to arc or weld and could cause
severe burns.
STORAGE
The UPS should only be stored if the battery is fully charged. Avoid storage
temperatures above 80
 F as battery life is significantly shortened. Every 90
days remove the unit from storage and plug it in for 24 hours to recharge the
batteries. Batteries may be damaged if left in storage and not recharge every
90 days.
IMPORTANT NOTICE
Please use same type and same rating of batteries for replacement.
Do not replace it with the battery that exceeds specified rating.
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