Njoy Aster 6KT User Manual page 7

1. It is suggested to install an external isolating device against backfeed
current between mains input and UPS. After the device is installed,
a warning label must be attached to the external AC connector with
the following text: RISK OF BACKFEED CURRENT. Isolate the UPS
with the isolating device before operating on this circuit, then check
for hazardous voltage between all terminals.
Typical external isolating device installation
2. No matter the UPS is connected to the mains power or not, the
output of the UPS may be electrically live. The parts inside the unit
may still have hazardous voltage after turning off the UPS. To make
the UPS have no output, turn off the UPS, and cut off the mains
power supply, wait the UPS shut down completely, finally cut off the
battery connection.
3. Open the terminal block cover located on the rear panel of UPS,
please refer to the appearance diagram.
4.
Ensure the capacity of mains power supply. Do not use the wall
receptacle as the input power source for the UPS, as its rated
current is less than the UPS's maximum input current. Otherwise the
receptacle may be burned and destroyed.
5.
The protective earth ground wire should be installed first according
to the following diagram. It is better to use green wire or green wire
with yellow ribbon wire.
Fig. 2
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