−
6
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2. For Proper Operation
2.1 Input Power Requirements
(1) Please use UPS as a commercial power supply in the region and the output voltage of UPS
are matched referring to the table below.
MODEL
AC input voltage
AC input frequency
NOTE
E11A202U001
120V (+15%,-20%)
50 or 60Hz (
±
5%)
※
E11A202U001J
100,110,115,120V (+15%,-20%)
50 or 60Hz (
±
5%)
※
※
The frequency variation range is set to
±
3% when the UPS is shipped from the factory.
If the frequency variation range of input power supply is
±
5%, select
±
5% as described in item
③
“Frequency sync range” of §10.1 “Setup Menu Item List”. An input power error occurs when
the frequency sync range exceeds the setting value, preventing the UPS from switching to
inverter operation.
(2) The current capacity of the AC power supply must satisfy the requirements of the UPS
(It is different depending on the model.)
MODEL
Input capacity
Recommended capacity of breaker
E11A202U001
1.8kVA
20A or more (Demand of UL rules)
E11A202U001J
1.8kVA
30A or more (Demand of UL rules) *
*NOTE: Please set up Branch circuit protector of 30A in the switchboard for E11A202U001J.
In branch circuit protector, please protect two poles of the ac input.
(Demand of UL rules)
2.2 Installation Precautions
* Installation must be in accordance with the National Electric Code Articles 110-17 and 110-18.
(1) Carefully consider the leakage current when a leakage circuit breaker is installed on the
input side. The maximum leakage current of the UPS is 3mA.
(2) Keep the UPS at least 1 m (about 40 inches) away from CRT displays. Other devices which
may be sensitive to magnetic flux should be kept away from the UPS, as it emits a slight
amount of magnetic flux.
(3) The UPS employs a fan for forced-air cooling. Provide at least 20 cm (about 8 inches)
clearance at the front and back of the UPS to permit free airflow at the air intake and
exhaust vents. Also, for maintenance purposes, a space of at least 1 m (about 40 inches) will
be needed at the front of the UPS and a space of at least 50 cm (about 20 inches) will be
needed at the back of the UPS.
When mounting the UPS in a rack, use a rack which allows ventilation and provide at least
20 cm (about 8 inches) clearance from the front and back of the rack to permit free airflow at
the air intake and exhaust vents. Also, for maintenance purposes, a space of at least 1 m
(about 40 inches) will be needed at the front of the rack, and a space of at least 50 cm (about
20 inches) will be needed at the back of the rack.
For details, see §6.3 “Installation Space”.
(4) When the AC input power is single-wire grounded, always connect the ground phase to the S
terminal (phase) side on the UPS.
(5) As far as possible, do not ground the output (load) side. If you must make a single-wire
grounded connection, always connect the ground phase to the V terminal (phase) side on the
UPS. (This is to prevent short-circuiting by the ground.)
2.3 Usage Precautions
(1) Never short-circuit the output terminals, or connect a load which draws short-circuit current.
Doing so causes protective functions to activate or the circuit breakers to trip, preventing
output.
(2) Unsuitable load devices
Do not connect laser printers, plain paper fax machines, copy machines, or overhead
projectors as load devices. Such devices typically include heating elements that draw high
current. This may cause an overload that could prevent battery backup operation when an
outage occurs, and could damage the UPS.
