Emerson NX manual Other DC Sources, Battery retorque values, Retorque Value

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Maintenance

Battery Cell Terminals: Check for discoloration, corrosion and connection integrity. Clean and tighten if necessary. NOTE that when installing a new battery, the initial torque value is 5 lb.-in. more than the retorque value. Table 7 shows battery retorque values.

Table 6 Battery retorque values

			Retorque Value
	Battery Mfr.	Battery Model #	in-lb (N-m)

		UPS12-300MR	110	(12.4)

		UPS12-350MR	110	(12.4)

	C&D	UPS12-400MR	110	(12.4)

		UPS12-490MRLP	110	(12.4)

		UPS12-540MR	110	(12.4)

		HX205-FR	65	(7.3)

		HX300-FR	65	(7.3)

		HX330-FR	65	(7.3)

	Enersys	HX400-FR	65	(7.3)

		HX500-FR	65	(7.3)
		HX500-FR	65	(7.3)

		HX540-FR	65	(7.3)

		16HX800F	100	(11.3)

		16HX925F	100	(11.3)

		24HR3000	65	(7.3)

	East Penn	27HR3500	65	(7.3)

		31HR4000	65	(7.3)
		31HR4000	65	(7.3)

		31HR5000	65	(7.3)

If the system uses a different model battery, contact Liebert Services for the required torque value.

To access battery cell terminals, disconnect the inter-tier cable and two shelf retaining screws. Once disconnected, insulate (with protective boot or electrical tape) the cables to prevent accidental shorts.

The battery shelf can now be pulled out. Tighten each terminal connection to the retorque value.

When replacing a battery, the terminal connections must be cleaned and tightened. Disconnect and insulate the cables connected to the battery. Secure each battery shelf with retaining screws when maintenance is complete.

Other DC Sources

If the UPS system uses a DC source other than a factory-supplied Matching Battery Cabinet, perform maintenance on the DC source as recommended in the DC source manufacturer’s maintenance manual, available on the manufacturer’s Web site.

Liebert®NX™

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Contents Liebert NX Product Warranty Registration Table of Contents Maintenance SpecificationsOptions Figures Page Important Safety Instructions Battery Cabinet Precautions Typical single module UPS system one-line diagram General DescriptionBattery Mode Normal ModeBypass Mode Maintenance BypassOptions Features Main component locations-225 to 300kVA Liebert NXFront Doors Removed Main display screen, typical Touchscreen Navigation Main Display ScreenSystem Status Events Log Menu Rectifier Bypass Inverter Chg/Boost Battery LoadStatus Measures MenuBattery Menu Battery StatusBattery Test Battery Measures Battery parametersLife Menu Life menuRectifier Functional Block Settings MenuAnimated One Line Mimic About MenuLoad on Bypass Load on bypass, UPS availableInput Power Failure-Load on DC Source Off DC SourceRemote Emergency Power Off Manual Operations-All SystemsStartup-Single Module System Startup-1+N System Transfer Procedure Retransfer ProcedureLoad Transfer and Retransfer-Single Module System 6 1+N System Transfer load from UPS to Bypass 7 1+N System Transfer load from Bypass to UPS Shut Down-Single Module UPS System9 1+N System Shutdown Load Transfer-1+N System Remove a UPS from System Collective Load Transfer-1+N System Add a UPS to the System CollectiveAutomatic Operations Overloads Without TransferCurrent-versus-time curves of overload capacity Automatic Transfers to Bypass, UPS System Faults Automatic Transfers to Bypass Overload ConditionAutomatic Retransfers to UPS Remote Alarm Unit MopUPS Shutdown and Monitoring SoftwareManage UPS Adapter ConnectivityConnectivity combinations Available Selectable Input Contacts Available Selectable Output ContactsSafety Precautions Professional Startup Liebert ServicesMaintenance Agreements The Signature Program TrainingRoutine Maintenance Record LogAir Filters Limited Life Components Battery MaintenanceUPS component service life Component Expected Life ReplaceBattery Safety Precautions Battery Voltage, VDC Matching Battery Cabinets-OptionalBattery voltage, nominal and float Number of Cells Nominal Float 240 480 527Other DC Sources Battery retorque valuesBattery Mfr Battery Model # In-lb N-m Retorque ValueDetecting Trouble Reporting a ProblemUpstream Feeder Circuit Breaker Setting Inspections Items to check includeDC Sources Battery OperationEnvironmental specifications Other DC SourcesElectrical specifications Physical specificationsSpecifications LiebertNX Page Twor k Ne tIs t Care