APC 650 - Manual (Page 11)

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4.6 Connect to Utility
Plug the UPS into a two-pole, three-wire, grounded receptacle only. Avoid using extension cords
and adapter plugs.
4.7 Charge the battery
The UPS charges its battery whenever it is connected to utility power. For best results, charge the
battery for 4 hours before use. It is acceptable to use the UPS without first charging the battery,
but on-battery run time may be reduced until the battery charges.
4.8 Connect the Loads
Plug the loads into the output connectors on the rear of the UPS. To use the UPS as a master on/
off switch, make sure that all of the loads are switched on.
Caution: Do not connect a laser printer to the UPS along with other computer equipment unless the UPS is
rated 1400 VA. A laser printer periodically draws significantly more power than when idle, and may overload
the UPS. Verify that the UPS can support the loads when the printer is in full operation (printing).
Test the system with all loads operating to make sure that the UPS is not overloaded. See section 6.2.
4.9 Check the Site Wiring Fault Indicator
After plugging in the loads and the UPS, check the site wiring fault indicator on the rear panel.
See section 3.2 for the location of the indicator on the back panel. It lights if the UPS is plugged
into an improperly wired AC power outlet. Wiring faults detected include missing ground, hot-
neutral polarity reversal, and overloaded neutral circuit.
Caution:
If the UPS indicates a site wiring fault, get a qualified electrician to correct the building
wiring.