16
2 Installation
Vertiv™ | Liebert® PSI5 120V Input / 120V Output & 208V lnput / 208V Output Installer/User Guide
2.11 Connecting AC Input
CAUTION: For 1U and MT UPS models, to reduce the risk of fire, connect only to a circuit
provided with 20A maximum branch circuit over current protection in accordance with the
National Electrical Code, ANSI/NFPA 70 and the Canadian Electrical Code, Part I, C22.1.
Ensure that all the loads are first powered off. Connect to an input power supply/wall outlet that is properly
protected by a circuit breaker in accordance with national and local electrical codes. The input receptacle
must be grounded. See
Specifications
on
page 31
, for input cord rating. An external circuit breaker as
described in Table 2-1 below is recommended.
Once the UPS is plugged into the wall outlet, it begins charging the battery.
NOTE: While every precaution has been taken to ensure that the battery is in good condition, Vertiv
TM
recommends plugging the UPS into AC input and to charge the battery for at least 12 hours prior to
providing full backup time protection for any utility power abnormality.
Table 2-1 Recommended external circuit breaker
WIRING
MODEL
RECOMMENDED EXTERNAL BREAKER
PSI5-750MT120
15A
PSI5-800RT120
PSI5-1100RM1201U
PSI5-1100MT120
PSI5-1100RT120
PSI5-1500RM1201U
PSI5-1500RT120
PSI5-1500RT120TAA
PSI5-1500MT120
PSI5-1500MT120LI
PSI5-2200RT120
20A
PSI5-2200RT120TAA
PSI5-2200RT120LI
PSI5-3000RT120TAA
30A
PSI5-3000RT120LI
PSI5-3000RT120
PSI5-5000RT208