5
300 Installation (for Qualified Personnel Only)
301 Cautions
On Switch and
Alarm Silence
Off/Bypass
Switch
Alarm LED
Line LED
Battery LED
Percent Load LEDs (on line)
or Battery Capacity LEDs (on
inverter/battery power)
Inverter LED
Bypass LED
Figure 3
CAUTION
UPS units contain hazardous AC and DC voltages. A qualified electrician must install the UPS, AC utility
input and output cabling, and external batteries according to local and national codes and must be familiar
with batteries and battery installation.
Before installing, maintaining, or servicing the UPS, shut off the UPS and disconnect all sources of AC and
DC power. You must shut down the UPS and disconnect AC line input at the external isolator to make sure it
will not supply output voltage. Whenever AC and/or DC voltage is applied, there may be AC voltage at the
UPS output; this is true because the UPS can supply output power from the input source or its batteries. To
avoid equipment damage or personal injury, always assume that there is voltage at the UPS output, even when
no front panel LEDs are on.
To reduce the risk of fire or electric shock, install the UPS and external batteries in a temperature-controlled
and humidity-controlled indoor area, free of conductive contaminants.
UPS batteries are high current sources. Shorting battery terminals or DC terminal strips can cause severe
arcing, equipment damage, and injury. A short circuit can cause a battery to explode. Always wear protective
clothing and eye protection and use insulated tools when working near batteries.
If you have an optional bypass switch, make sure it is switched off before you install it. Make sure all inverter
interlock cables are installed before you operate the switch.
For normal installation, the side covers do not need to be removed. The nominal battery voltage for the
UPS is 240 VDC.
