Emerson Liebert FPC User Manual
AC Power
For Business-Critical Continuity™
Liebert FPC
User Manual - 15 kVA - 300kVA, 3 Phase, 50 & 60 Hz
™
TABLE OF CONTENTS
1.0 INSTALLATION INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
1.1 Unpacking and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1.1 Unpacking and Preliminary Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1.2 Handling Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1.3 Unit Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1.4 Location Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1.5 Floor Pedestal Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.2 Additional Distribution Mounting & Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.2.1 Liebert FDC Distribution Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.2.2 Distribution Cabinet Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.3 Power and Control Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.3.1 Input Power Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.3.2 Junction Box Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
1.3.3 System Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
1.3.4 Grounding Electrode Conductor for FPCs With Transformer . . . . . . . . . . . . . . . . . . . . . . . . . 16
1.3.5 Output Power Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
1.3.6 Control Wiring Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2.0 EQUIPMENT INSPECTION AND STARTUP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
2.1 Internal Inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
2.2 Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.0 INSPECTION AND STARTUP CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.1 Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.2 Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3.3 Monitoring System Check-Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.4 Equipment Connection Check-Out of Units With Distribution Cables. . . . . . . . . . . . . . . . . 28
4.0 OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
4.1 Startup Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.1.1 Emergency Shutdown—If Emergency Power Off switch is supplied . . . . . . . . . . . . . . . . . . . 29
4.1.2 Normal System Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.1.3 Normal System Turn ON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.1.4 Manual Restart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.2 Basic Monitor Panel (Units Without Monitoring) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
4.3 Power Monitor Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5.0 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
5.1 Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.2 Inspection and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.2.1 Inspection Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
i
FIGURES
Figure 1 Typical cabinet and floor planning dimension data, 23" (584mm) cabinet, 15-125 kVA . . . . . . . . 3
Figure 2 Typical cabinet and floor planning dimension data, 47" (1194mm) cabinet 50-300kVA . . . . . . . . 4
Figure 3 Recommended minimum service and ventilation clearances. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 4 Floor pedestal details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 5 Electrical connection location for 23" (584mm) cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 6 Electrical connection location for 47" (1194mm) cabinet—Front view . . . . . . . . . . . . . . . . . . . . . 10
Figure 7 Electrical connection location for 47" (1194mm) cabinet—Rear view . . . . . . . . . . . . . . . . . . . . . . 10
Figure 8 Electrical connection location for 47" cabinet with SqD I-Line panelboard—Front view. . . . . . . 11
Figure 9 Electrical connection location for 47" cabinet with SqD I-Line panelboard—Rear view . . . . . . . 11
Figure 10 Low voltage control junction box connections, typical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 11 Main input junction box connections, typical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 12 Typical grounding arrangements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 13 Typical Liebert FPC equipment arrangement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 14 Simplified shutdown circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 15 Typical control wiring for units without monitoring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 16 Typical control wiring for units with monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 17 Basic monitoring panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 18 Power monitor panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
TABLES
Table 1 23-inch cabinet weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Table 2 47-inch cabinet weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Table 3 Liebert FPC heat output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Table 4 Suggested minimum input wire size data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Table 5 Main input circuit breaker interrupting rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Table 6 Main input junction box electrical connections (4 wire) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Table 7 Main input junction box without transformer electrical connections (5 wire) . . . . . . . . . . . . . . . 14
Table 8 Low-voltage (control) junction box dimensions, typical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Table 9 Main input (power) junction box dimensions, typical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Table 10 Minimum grounding electrode conductor size (AWG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Table 11 Panelboard main circuit breaker torque specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 12 Branch circuit breaker torque specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 13 Terminal block compression lug torque specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 14 Torque specifications, general . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 15 ASCII interface default parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Table 16 RS-232 ASCII port customer commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Table 17 Monitored parameters data definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
ii
IMPORTANT SAFETY INSTRUCTIONS
NOTE
Read the entire manual before installing or operating the system.
WARNING
!
The shipping bands may be under tension. Use appropriate eye, face, and hand protection to
safeguard against injury from band backlash.
WARNING
!
Verify that all incoming line voltage (power) and low-voltage (control) circuits are
de-energized and locked out before installing cables or making connections, whether in the
junction box or in the unit.
Equipment inspection and start-up should be performed only by trained personnel. Lethal
voltages are present during start-up procedures. Electrical safety precautions must be
followed throughout inspection and startup.
Only qualified service personnel should perform maintenance on the Liebert FPC system. All
voltage sources to the unit must be disconnected before inspecting or cleaning within the
cabinet.
Lethal voltages exist within the equipment during operation. Observe all warnings and
cautions in this manual. Failure to comply may result in serious injury or death. Obtain
qualified service for this equipment as instructed.
The monitoring system contains a lithium battery for memory backup. There is a danger of
explosion if battery is incorrectly replaced. Replace only with same or equivalent type.
Dispose of used batteries according to the manufacturer’s instructions.
NOTE
The unit should not be loosened from the shipping pallet until all handling by fork lift or pallet
jack is completed.
All power and control wiring should be installed by licensed electricians and must comply with
the NEC and applicable codes.
1
1.0 INSTALLATION INSTRUCTIONS
1.1 Unpacking and Installation
NOTE
Read the entire manual before installing and operating the system. Upon receipt of a Liebert
FPC™, the installer should perform the following steps to ensure a quality installation.
1.1.1 Unpacking and Preliminary Inspection
A quality installation begins on the receiving dock.
1. Inspect the shipping crate(s) for damage or signs of mishandling before unpacking the unit(s).
Check the Shock-Watch™ indicator.
2. Remove the packing and inspect the equipment for any obvious shipping damages.
3. If the FPC was shipped in an export crate, open the shipping crate carefully.
Use care to avoid puncturing the container with sharp objects that would damage the contents.
4. Remove the packing and vapor barriers and inspect the equipment for any obvious shipping
damages.
NOTE
The units should not be loosened from the shipping pallet until all handling by fork lift or
pallet jack is completed. Complete internal inspection should be accomplished only after
equipment positioning and prior to electrical hookup.
Installation Instructions
5. If any damage is observed, immediately file a damage claim with the shipping agency and forward
a copy to:
Liebert Corporation
1050 Dearborn Drive
P.O. Box 29186
Columbus, Ohio 43229 USA
1.1.2 Handling Considerations
The Liebert FPC™ (and cables, if furnished) is bolted to a wooden pallet to allow handling by forklift
equipment.
The Liebert FPC and cable reels are furnished with casters to allow the unit to be rolled into place
after it has been unbolted from the pallet. The FPC should be kept on the shipping pallet until it has
been moved by forklift as close as practical to its installation location.
Refer to the cabinet drawings furnished with the FPC for the unit’s size and weight. Typical cabinet
dimensions and weights are shown in Figures 1 and 2.
The route to the FPC’s installation area should be planned to ensure that all passages, including doorways, elevators, ramps and hallways, are large enough to accommodate the unit and that the floors
are strong enough to support the weight. Determine whether any corners or offsets would cause problems in maneuvering the unit.
Liebert recommends removing the exterior side panels, if supplied, before the unit is moved. This will
prevent scratches, dents and other damage to the panels.
2
Installation Instructions
Figure 1 Typical cabinet and floor planning dimension data, 23" (584mm) cabinet, 15-125 kVA
Overall Dim.
39-1/2" (1003mm)
Including hinge
and bezel
projection
Overhead clearance
of 18" (457mm)
recommended
for cooling airflow
Minimum side
clearance of 42" (1067mm)
recommended for service access
if unit is equipped with
distribution monitoring option
Shaded areas indicate
recommended clearance
of 42" (1067mm) at front and
rear for service access
Cabinet Dimensional Data
23-1/2"
(597mm)
Unit Base Outline
36.4"
(925mm)
Overall Dimension
25.2" (640mm)
including side
panels
78-1/2" (1995mm)
For units with bottom
cable access, clearance
of 6" (152mm) below
unit is recommended
for cooling airflow
and cable entry/exit
34" (864mm)
1.2"
(30mm)
Front
Footprint and Floor
Cutout Dimensions
1.2"
(30mm)
6"
(152mm)
11-1/2" (292mm)
Shaded area indicates
cable access and
cooling airflow
6" (152mm)
36.4" (925mm)
Unit Base Outline
Floor Pedestals
available from
6" (152mm) to 18"
(457mm)
Table 1 23-inch cabinet weight
Unit
kVa
15 1010 (458) 1060 (480) 750 (340)
30 1090 (494) 1140 (517) 750 (340)
50 1160 (526) 1235 (560) 750 (340)
75 1350 (612) 1450 (658) 800 (363)
100 1540 (699) 1665 (755) 800 (363)
125 1650 (748) 1775 (805) 800 (363)
23-1/2" (597mm)
Front
Weight, lb (kg)
60Hz 50Hz
Optional Floor Pedestals
3.2" (81mm)
8.3"
(211mm)
Dia. location
3/4" (19mm)
typical
6" (152mm) 6" (152mm)
Without
Transformer
.56" (14mm)
diameter; 4 holes
typical
3
Installation Instructions
Figure 2 Typical cabinet and floor planning dimension data, 47" (1194mm) cabinet 50-300kVA
Overall Dimension
Overall Dim.
39-1/2" (1003mm)
Including hinge
and bezel
projection
48.6" (1235mm)
including side panels
1.3"
(33mm)
6" (152mm)
33.8" (859mm)
Overhead clearance
of 18" (457mm)
recommended
for cooling airflow
Minimum side clearance
78-1/2"
(1995mm)
1.3"
(33mm)
Front
Footprint and Floor
Cutout Dimensions
35" (889mm)
6" (152mm)
Shaded area indicates
cable access and
cooling airflow
of 42" (1067mm) recommended
for service access if unit is
equipped with distribution
monitoring option
For units with bottom
cable access, clearance
Shaded areas indicate
recommended clearance
of 42" (1067mm) at front and
rear for service access
47"
(1194mm)
Unit Base Outline
36.4"
(925mm)
of 6" (152mm) below
unit is recommended
for cooling airflow
and cable entry/exit
Cabinet Dimensional Data
36.4" (925mm)
Unit Base Outline
Front
Floor Pedestals
available from
6" (152mm) to
18" (457mm)
Optional Floor Pedestals
Table 2 47-inch cabinet weight
Unit
kVA
50 1891 (858) 1966 (892) 1335 (606)
75 1995 (905) 2095 (950) 1335 (606)
100 2191 (994) 2316 (1051) 1335 (606)
125 2298 (1042) 2423 (1099) 1360 (617)
150 2490 (1129) 2640 (1198) 1360 (617)
200 2610 (1184) 2810 (1275) 1360 (617)
225 2800 (1270) 3000 (1361) 1390 (631)
300 2845(1290) 3045 (1381) 1390 (631)
60 Hz 50 Hz Without Transformer
47" (1194mm)
43.8"
(1112mm)
Weight, lb (kg)
1.5" (38mm)
2.3" (58mm)
Dia. location
3/4" (19mm)
typical
9/16" (14mm)
diameter; 4 holes
typical
6" (152mm)
6" (152mm)
4
1.1.3 Unit Preparation
The Liebert FPC may be easily removed from the shipping pallet and installed by customer personnel. A typical procedure is as follows:
1. Set the palletized assembly in a level area where there is enough room to roll the Liebert FPC and
entire cable assembly off the pallet onto the floor.
2. Cut the shipping bands.
WARNING
!
The shipping bands may be under tension and may snap violently when cut. Use eye, face and
hand protection to guard against injury when the bands are cut.
3. Remove the factory-provided ramp from its shipping position.
One ramp is provided for every five units. Ramps are packed either in front of or on top of a set of
cable reel(s).
4. Place the ramp adjacent to the pallet to provide a smooth path from pallet to floor.
5. Remove side panels from the Liebert FPC, if supplied. An Allen wrench for the side panels is
furnished in the installation packet.
6. Remove the bolts and two mounting brackets holding the unit to the shipping pallet.
Mounting brackets are located on either side of the unit.
7. If cables are on wheeled cable reel(s), remove the bolts holding the reel(s) to the pallet and remove
the nailed-on shipping blocks.
8. Roll the unit off the pallet onto the floor, carefully guiding the cable reel(s) after it.
9. Roll the FPC and the cable reel(s) to the installation area. For units to be placed on a raised floor,
use care when positioning unit over the floor cutout to prevent the casters from falling through
the cutout.
Installation Instructions
CAUTION
!
Before maneuvering the unit into its final position, read and follow all advisories in 1.1.4 Location Considerations.
1.1.4 Location Considerations
The Liebert FPC should be placed near the load(s) it will supply, preferably within the data center.
Equipment location should employ the shortest output distribution cable runs consistent with logical
equipment arrangement and allowance for expansion.
The FPC is intended for indoor installation in an area with ambient temperatures of 32°F to 104°F
(0°C to 40°C) with a relative humidity of 0% to 95% (non-condensing).
Bottom clearance is required for units with bottom entry/exit of cables. This clearance may be provided by a raised floor at least 6" (150mm) high. Figures 1 and 2 show the typical raised-floor cutout
dimensions for cables and cooling airflow.
When units are not installed on a raised floor, or if the raised floor will not support the unit, optional
floor pedestals may be used. (CSA regulations require FPC arrangements employing a raised floor.
Non-raised floor applications are not CSA approved.) Units with top cable exit provisions do not
require bottom clearance.
Recommended minimum service clearances are shown in Figure 3. The National Electrical Code
(NEC) requires the indicated front and rear clearances for service access. Clearance above the unit is
required for cooling airflow (exhaust). Units with optional distribution monitoring also require service
access clearance on the left side.
As do all electrical devices, the Liebert FPC produces heat under normal operation. (See Table 3.)
This heat must be accounted for when calculating the environmental conditions of the room.
5
Figure 3 Recommended minimum service and ventilation clearances
Minimum clearance
of 18" (457mm)
above unit is
recommended for
cooling airflow
See Notes 2
and 3.
Installation Instructions
Front and rear access
is required. See
Notes 1 and 2.
NOTE
1. Service access is required at the front and rear.
2. Service access clearance dimensions: 36" (914mm) for units up to 150V to ground. 42"
(1067mm) for units over 150V to ground.
3. Service access is required on the left side, if unit is equipped with Liebert Distribution
Monitoring Option.
Table 3 Liebert FPC heat output
Full Load
Unit kVA
15 2,500 (0.73)
30 4,600 (1.35)
50 6,200 (1.82)
75 8,150 (2.39)
100 9,900 (2.90)
125 11,500 (3.37)
150 12,500 (3.66)
200 15,500 (4.54)
225 15,800 (4.63)
300 18,450 (5.40)
Heat Output
BTU/Hr (kW)
Minimum clearance
of 6" (152mm) below
unit is recommended
for cable entry and exit
6
1.1.5 Floor Pedestal Installation
Floor pedestals are optional equipment that provide clearance for bottom cable entry or exit for FPC
units not installed on raised flooring. The pedestals are adjustable over a limited range (approximately 3-1/2" [89mm]) to allow leveling the FPC and minor adjustments in the unit’s installed height.
CAUTION
!
Floor pedestals may be reverse-assembled for shipping. Before installation, the pedestals
should be reassembled as shown in Figure 4. When the pedestal is properly assembled, the
washer on top of the welded nut provides a bearing surface for the unit’s weight.
1. Insert the pedestal threaded shaft into the pedestal holes in the cabinet base as shown in
Figures 1 and 2.
2. Adjust the pedestal height by turning the welded nut/shaft assembly into or out of the pedestal
base as required.
3. Lock the height by tightening the jam nut against the pedestal base.
The pedestal may be anchored to the floor by means of the four holes in the base. Locations of
floor pedestals are shown in Figures 1 and 2.
Figure 4 Floor pedestal details
Installation Instructions
3"
(76m m)
Threaded
Shaft
Washer
Welded Nut
Jam Nut
Pedestal
Base
.56" ( 14 mm)
diam eter
mounting holes
2-1/4"
(57mm)
6"
(152mm)
square
2-1/4"
(57mm)
2-1/ 4"
(57mm)
2-1/4"
(57mm)
7
1.2 Additional Distribution Mounting & Wiring
For Liebert FPCs with more than four panelboards, the additional panelboards are furnished in Liebert FDC enclosures, which are shipped separately from the Liebert FPC.
1.2.1 Liebert FDC Distribution Mounting
The Liebert FDC distribution cabinet has the same base dimensions as a 23" (584mm) cabinet FPC
(23-1/2" wide x 38" deep [597 x 965mm]) and may be mounted on either the left or right side of the FPC.
1. Provide a floor cutout for exit of output cables, as shown in Figure 1.
2. Remove the side panel, internal panel and the lower panel bracket from the FPC.
3. Remove the FDC side panel and internal panel, if supplied, and align the FDC with the FPC and
bolt the units’ frames together (hardware provided by others).
If floor pedestals are used for the FPC, two additional floor pedestals are required for the outside
corners of the FDC. See Figure 1.
4. Install the lower panel bracket on the opposite side of the FDC cabinet.
5. Make electrical connections. For details, see “Electrical Field Connections” drawings supplied
with the unit.
6. Install the FPC side panel on the FDC cabinet.
1.2.2 Distribution Cabinet Electrical Connections
Five field-supplied conductors (3-phase conductors, neutral and ground) are needed to connect the
FDC cabinet to the FPC cabinet in the field.
For Liebert FPCs with transformers, the distribution cabinet phase conductors are connected directly
to the transformer terminals:
Phase A to X1
Phase B to X2
Phase C to X3
The FDC’s neutral and ground conductors are connected to the FPC’s neutral busbar and main
ground busbar (see unit wiring diagram for location).
For Liebert FPCs without transformers, the distribution cabinet phase and neutral conductors are
connected to the corresponding output power distribution terminal blocks inside the FPC. The distribution cabinet ground conductor is connected to the main ground busbar.
For all Liebert FPCs with current monitoring, route each distribution cabinet conductor through the
appropriate current transformer (CT) in the FPC.
Installation Instructions
NOTE
Distribution cabinet conductors must pass through the current transformers in the same
direction as the FPC panelboard conductors. Use the existing FPC panelboard wiring for
reference.
1.3 Power and Control Wiring
Power and control wiring should be installed by licensed electricians. All power and control wiring
must comply with the NEC and applicable local codes.
1.3.1 Input Power Connections
If the FPC is furnished with a main input junction box, input power connections are made as detailed
in 1.3.2 - Junction Box Installation.
If a junction box is not furnished, the input power feeder is connected to the main input circuit
breaker located inside the FPC. (See Figures 5 through 8.)
WARNING
!
Verify that all incoming line voltage (power) and low-voltage (control) circuits are
de-energized and locked out before installing cables or making connections, whether in the
junction box or in the FPC.
8
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