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Emerson Liebert FPC, +24VDC, Unit EPO, Main, N.O. Repo, Source, Input, Breaker, N.C. Repo

Models: FPC

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Installation Instructions

1.3.6Control Wiring Connections

NEC Article 645 requires that emergency power off (EPO) switches be located at the principal room exits. All standard Liebert power conditioning systems have provisions for external shutdown control from Remote Emergency Power Off (REPO) stations. Figure 14 is a simplified diagram of the shut- down circuitry of the Liebert FPC.

Low-Voltage Control Circuit

Control wiring connections must comply with the NEC and all other applicable codes.

! WARNING

Verify that all incoming high-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.

As shown in Figure 14, the control circuit operates on 24VDC. The shutdown device (represented by the REPO switch) activates a low-current, 24VDC relay that in turn operates the shunt-trip mecha- nism. The shunt-trip solenoid opens the Main Input Breaker, which de-energizes the power center.

Multiple-Unit Shutdown

When more than one power center is installed by the user, a typical requirement is that actuation of a single device (REPO for example) must shut down all power centers. The low-voltage control circuits of all standard Liebert FPC systems are designed to meet this requirement.

External Control Wiring Connections

External control wiring connections for remote shutdown, alarm, and/or monitoring are made to the low-voltage junction box (if used) or to the low-voltage control terminal strip located inside the unit.

Control wiring connections vary with the type of monitoring system furnished with the unit. Two typ- ical control wiring configurations are shown in Figures 15 and 16.

Figure 14 Simplified shutdown circuit

	Liebert FPC			Remote
				Shutdown
		+24VDC	1	Devices
K5	K6		1
K5	K6
		Unit EPO	4
+		Unit EPO
+
24VDC	Main			N.O. REPO
Source	Input	K6	6
-	Breaker	Overtemp		N.C. REPO
-	Shunt	Switch		N.C. REPO
	Trip	K5	2
				A	7	4	1
			3				Building
			3				Interface
							Interface
				R1			Relay
				B	9	6	3

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Emerson user manual Liebert FPC, +24VDC, Unit EPO, Main, N.O. Repo, Source, Input, Breaker, N.C. Repo, Shunt, Trip

Contents

Liebert FPC User Manual - 15 kVA - 300kVA, 3 Phase, 50 & 60 HzAC Power For Business-Critical ContinuityPage TABLE OF CONTENTS 1.0 INSTALLATION INSTRUCTIONS3.0 INSPECTION AND STARTUP CHECKLIST 5.0 MAINTENANCEFIGURES TABLESIMPORTANT SAFETY INSTRUCTIONS Read the entire manual before installing or operating the system1.1 Unpacking and Installation 1.0 INSTALLATION INSTRUCTIONS1.1.1 Unpacking and Preliminary Inspection 1.1.2 Handling ConsiderationsFront Footprint and Floor Cutout DimensionsCabinet Dimensional Data 23-inch cabinet weightFront Footprint and Floor cable access andCutout Dimensions cooling airflow 47-inch cabinet weight1.1.3 Unit Preparation 1.1.4 Location ConsiderationsFigure 3 Recommended minimum service and ventilation clearances Liebert FPC heat output1.1.5 Floor Pedestal Installation Figure 4 Floor pedestal details1.2 Additional Distribution Mounting & Wiring 1.3 Power and Control Wiring1.3.1 Input Power Connections 1.2.1 Liebert FDC Distribution MountingFigure 5 Electrical connection location for 23 584mm cabinet 15006 - RevFPC15000 Rev Square “D” I-Line Panelboard Detail B Output Ground Busbar Approx. 1/4 Thick88 22mm 88 22mmTable 4 Suggested minimum input wire size data Installation InstructionsUnits with Transformers Transformerless UnitsSuggested minimum input wire size data continued Installation InstructionsTable 5 Main input circuit breaker interrupting rating 1.3.2 Junction Box Installation Table 6 Main input junction box electrical connections 4 wireTable 8 Low-voltage control junction box dimensions, typical Main input power junction box dimensions, typical1.3.3 System Grounding Equipment GroundingFigure 10 Low voltage control junction box connections, typical Figure 11 Main input junction box connections, typicalSignal Reference Grid 1.3.4 Grounding Electrode Conductor for FPCs With TransformerTable 10 Minimum grounding electrode conductor size AWG Typical Liebert FPC with transformer grounding arrangement systemTypical Liebert FPC without transformer groundingFigure 12 Typical grounding arrangements 1.3.5 Output Power Connections Liebert FPC Installation InstructionsFigure 13 Typical Liebert FPC equipment arrangement Liebert FPC +24VDCUnit EPO 24VDCLow Voltage Terminal StripFigure 15 Typical control wiring for units without monitoring WiringLow Voltage Terminal Strip Figure 16 Typical control wiring for units with monitoringFactory-Supplied Wiring Checklists Warranty2.1 Internal Inspection 2.2 StartupTable 11 Torque specifications, general Table 12 Panelboard main circuit breaker torque specificationsTable 13 Branch circuit breaker torque specifications Table 14 Terminal block compression lug torque specifications3.0 INSPECTION AND STARTUP CHECKLIST 3.1 Inspection3.2 Startup Basic Indicators Power Monitor Panel3.3 Monitoring System Check-Out Manual Restart CheckCustomer Alarms 3.4 Equipment Connection Check-Out of Units With Distribution Cables4.1 Startup Procedures 4.1.1 Emergency Shutdown-If Emergency Power Off switch is supplied4.0 OPERATING INSTRUCTIONS 4.1.2 Normal System Shutdown4.3 Power Monitor Panel Alarm Present/Silence4.2 Basic Monitor Panel Units Without Monitoring Figure 18 Power monitor panelAlarms - Upon occurrence of any of the following alarms, the alarm message appears on the LCD dis- play, the Alarm Present/Silence switch is illuminated, and the audible alarm is activated. Pressing the “Alarm Present/Silence” switch silences the audible alarm. After the alarm condition is corrected, the alarm can be reset by pressing the “Alarm Present/Silence” switch when prompted by the LCD display or by way of any Central Monitoring System Table 15 ASCII interface default parameters Table 16 RS-232 ASCII port customer commandsTable 17 Monitored parameters data definitions Operating InstructionsField # Data item5.2 Inspection and Cleaning 5.0 MAINTENANCE5.1 Repair 5.2.1 Inspection SchedulePage Ensuring The High Availability 0f Mission-Critical Data And ApplicationsNe t ti n