Vertiv Liebert PPC - 4 Operating Instructions; Startup Procedures; Emergency Shutdown; Normal System Shutdown

Vertiv | Liebert
®
PPC
™
User Manual | Rev. 6 | 03/18 | 37
4.0 OPERATING INSTRUCTIONS
4.1 Startup Procedures
Before the unit is placed into service after initial installation, after equipment relocation, or after equipment has
been de-energized for an extended period of time, perform equipment inspection and startup procedures as
detailed in 2.0 - EQUIPMENT INSPECTION AND STARTUP and 3.0 - INSPECTION AND STARTUP
CHECKLIST.
After initial system startup, the following guidelines can be used for standard equipment operation. These
guidelines should be reviewed for any special equipment modifications, special site considerations, or company
policies which may require changes to the standard equipment operation.
4.1.1 Emergency Shutdown
To perform an immediate system shutdown during emergency conditions, lift the clear, protective cover and
push the “Emergency Power Off” (EPO) switch on the unit front door.
To perform an immediate room shutdown, if the site is equipped with a REPO switch (as required by NEC Article
645 at the principal exit doors), activate one of the REPO switches.
4.1.2 Normal System Shutdown
To perform a normal system shutdown, perform an orderly load equipment (computer system) shutdown
according to the load equipment manufacturer’s recommended shutdown sequence. The load equipment can be
turned Off at each piece of load equipment or at the Liebert PPC’s output distribution (circuit breaker) panels
located behind the unit’s front door. Turn Off all unit output breakers, then turn Off the unit’s main input circuit
breaker. To remove all power from the unit, turn Off the building power to the unit’s input breaker or junction box.
4.1.3 Normal System Turn ON
Make certain all unit circuit breakers are in the Off position. All unit circuit breakers are located behind the front
doors. Turn On building power to the unit. Turn On the unit’s main input circuit breaker. If the circuit breaker has
been tripped Off (instead of being turned Off), the circuit breaker handle must be moved to the Off position
before being turned On. If the unit has a voltage monitoring panel, verify proper output voltages before turning
On output circuit breakers. Turn On the panelboard main breakers. Individually turn On each output circuit
breaker following the load equipment manufacturer’s startup sequence.
4.1.4 Manual Restart
If unit’s manual restart feature has been selected, the unit’s main input circuit breaker will be tripped upon a
power outage, preventing repetitive application of unstable voltage and allowing for an orderly system restart. If
the main input circuit breaker is tripped upon a power outage, after power is restored, follow the instructions
outlined in 4.1.3 - Normal System Turn ON.
NOTE
Depending on the particular control circuit wiring, operation of the unit EPO switch may cause other equipment
to also shutdown.