Vertiv Liebert PPC - Startup

Vertiv | Liebert
®
PPC
™
User Manual | Rev. 6 | 03/18 | 34
3.2 Startup
1. Make certain that all circuit breakers are in the Off position and that power to the unit is locked out.
___ 2. Remove the cover of the Main Input Junction Box. Verify proper input power connections to unit, including equipment
grounding conductor.
___ 3. Turn ON the building power to the junction box. Check the phase rotation at the junction box. Phase rotation should be
A, B, C, as indicated.
___ 4. Check and record the input voltages at the junction box:
Volts, phase A to phase B = ______________________
Volts, phase B to phase C = ______________________
Volts, phase C to phase A = ______________________
___ 5. Turn Off and lock out the building power to the input junction box.
___ 6. Replace the junction box cover.
___ 7. Verify proper input power connections to unit, including equipment grounding conductor and local grounding electrode
conductor.
___ 8. Turn On the building input power to the unit.
___ 9. Check phase rotation at main input breaker. Phase rotation should be A, B, C, left-to-right.
___ 10. Check and record the input voltage at the main input breaker. Measured voltages should correspond to the unit’s
nameplate input voltage.
Volts, phase A to phase B = ______________________
Volts, phase B to phase C = ______________________
Volts, phase C to phase A = ______________________
___ 11. Turn ON the main input breaker; wait one minute. (If breaker trips Off, check for wiring errors including control
connections. Contact Vertiv Services or the location factory representative for assistance.)
___ 12. Check the phase rotation at the line side terminals (top) of the panelboard main breaker(s) and any subfeed output
circuit breaker(s). The rotation should be A, B, C, left-to-right.
___ 13. Check and record the voltages at the line-side terminals of the output circuit breaker. Measured voltages should
correspond to the unit’s nameplate output voltage (within +4%,-0%).
Volts, phase A to phase B = ______________________
Volts, phase B to phase C = ______________________
Volts, phase C to phase A = ______________________
Volts, phase A to neutral = ______________________
Volts, phase B to neutral = ______________________
Volts, phase C to neutral = ______________________
If output voltage is incorrect, check for wiring errors, incorrect input voltage, or improper transformer tap. Contact Vertiv
Services at 800-543-2378 in the USA or the local factory representative for assistance.
WARNING
Risk of electric shock. Can cause injury or death.
Startup procedures should be performed only by properly trained and qualified personnel. Hazardous
voltages are present in the equipment throughout the majority of the startup procedure. Use proper
safety equipment. Proceed with caution.
NOTE
Steps 2 through 6 apply to the Main Input Junction Box. If this installation is not provided with a Main Input
Junction Box, proceed to Step 7.