PowerWalker VFI 1000 LE - Manual (Page 16)

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2.3 Installation steps for standard model
1) Make sure the wire / circuit breaker / socket are enough for the current
rating of UPS to avoid the hazards of electric shock and fire.
2) Make sure the mains switch in the building is cut off.
3) Make sure the UPS is not be turned on before wiring operation.
4) Turn off all load switches first before connecting the load to the UPS.
5) Make sure the protective earth ground is correct.
6) Connect the loads to the UPS through the outlet sockets.
7) Connect the input power cord of UPS to mains.
2.4 Installation steps for long back up time model
1) Make sure the wire / circuit breaker / socket are enough for the power
rating of UPS to avoid the hazards of electric shock and fire.
2) Make sure the mains switch in the building is cut off.
3) Turn off all load switches first before connecting the load to the UPS.
4) Make sure the protective earth ground is correct.
5) Install the external battery as following:
a) Warning: Make sure the mains input have been cut off.
b) Switch off the battery breaker if there is a battery breaker.
c) Remove the cover of external battery terminal of UPS.
d) Warning: Pay highly attention to the rating battery voltage marked
on the rear panel, the connection with wrong battery voltage may
cause permanent damage of the UPS.
e) Warning: Pay highly attention to the polarity marking on external
battery terminal block, and make sure the correct battery polarity is
connected. Wrong connection may cause permanent damage of the
UPS.