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

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)
	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)
	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™ 36