Vertiv
|
Liebert
®
PPC
™
User Manual | Rev. 6 | 03/18 |
35
___ 14. Depress the local Emergency Power Off switch and verify system shutdown. Turn the unit back On.
___ 15. Repeat
Step 14
for each REPO switch with which the system is equipped.
NOTICE
Risk of shutting down systems inadvertently. Can cause equipment damage.
Using the REPO switch may shut down more equipment or systems than just the Liebert PPC. Ascertain whether
necessary systems might be shut down before performing the procedure.
3.3
Monitoring System Check-Out
___ 16. BASIC INDICATORS
a.
Turn On the building power to the unit, then turn the Main Input Breaker On.
b.
Check that the Power LED on the front panel is illuminated.
___ 17. MANUAL RESTART CHECK. If unit is equipped with Manual Restart:
a.
Turn On building power to the unit. Turn Main Input breaker On.
b.
Turn Off all building power to unit.
c.
Observe that Main Input Breaker automatically trips open upon power loss.
d.
Restore building power to the unit and return Main Input breaker to On.
___ 18. POWER MONITOR PANEL. If unit is equipped with a Power Monitor Panel:
Turn the unit On. Ensure that the voltage values indicated by the Monitor Panel correspond to the voltage values
measured at the input and output circuit breaker (
Steps 10
and
13
).
___ 19. CENTRALIZED MONITOR. If the unit is connected to a Centralized Monitoring System:
Turn the unit and Centralized Monitoring System On. Verify proper communication to the monitor system operation.
___ 20. CONTROL VOLTAGE:
a.
Obtain access to the low voltage terminals in the Low-Voltage Junction Box (if used), or in the low voltage control
section inside unit.
b.
With the unit On, measure and record the DC control voltage on TerVout (+) and -Vout (-).
c.
Control Voltage =
(Voltage should be 12VDC ±5%.)
___ 21. CUSTOMER ALARMS. If customer alarms are provided:
a.
With the unit On, simulate alarm operation by jumpering the appropriate low-voltage control terminals. (Refer to the
control wiring installation drawing furnished with the unit.)
b.
Verify correct alarm annunciation by the Power Monitor Panel and/or by the Centralized Monitoring System.
NOTE
The Liebert PPC transformer has input voltage taps for each input phase. The taps are arranged in 2-1/2% or 5%
intervals ranging from -10% to nominal to +5%. This permits the transformer to provide the proper output
voltage for a range of input voltages. Should it be necessary, the tap arrangement may be changed to match the
input voltage:
• Open main input circuit breaker.
• Select tap arrangement to match input voltage. (Refer to transformer nameplate for tap information.)
• Secure each line to its proper tap.
• Repeat
Steps 11
to
13
.
Summary of Contents for Liebert PPC
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