Proper Tightening of Nuts and Bolts | Liebert 100-1000A instruction

Maintenance

17.0 MAINTENANCE

! WARNING

Only qualified service personnel should perform maintenance on the static switch. Lethal voltages exist inside the unit during normal operation.

The unit is supplied by multiple AC power sources. Disconnect and lock-out all power sources before working inside unit.

Minimal periodic maintenance of the Liebert STS2 is required. As with all electrical distribution components, the system should be regularly inspected for electrical connection integrity, signs of excessive temperatures, dirt accumulation, and proper system operation.

17.1Proper Tightening of Nuts and Bolts

The recommended tightening torque for all nuts and bolts is as shown below, unless otherwise labeled. All power connections are designed to remain at proper torque throughout the lifetime of the unit.

Table 24 Torque tightening

	Grade 5 -Imperial		Electrical Connections
Bolt Shaft	Grade 8.8 -Metric		With Belleville Washers
Bolt Shaft
Size	in-lb	N-m	in-lb	N-m

10-32	25	3	35	4

1/4-20	53	6	80	9.0

5/16-18	107	12	180	20.4

3/8-16	192	22	240	27.1

1/2-13	428	48	480	54.3

17.2Testing the Liebert STS2

The Liebert STS2 includes comprehensive system alarms and fault detection to identify operational problems. To increase the degree of confidence of proper system operation, periodic transfer tests can be easily performed. For instructions for changing the preferred source and switching sources:

•For a Color Graphical Display unit, see 10.2 - Manual Transfer / Preferred Source Selection on page 66.

•For an LED-equipped unit, see 14.2.2 - Manual Transfer / Preferred Source Selection on page 107.

17.3Changing the Air Filter

A standard furnace filter is installed behind the air intake in the front door. The air intake allows air to circulate to cool the unit. Replace the filter when it becomes dirty and impedes air flow. The frequency of changing or cleaning the filter depends on the location in which the unit is located.

The size of the filter is 1 in. x 25 in. x 25 in. (2.54 cm x 63.5 cm x 63.5 cm).

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Liebert 100-1000A Proper Tightening of Nuts and Bolts, Testing the Liebert STS2, Changing the Air Filter, Maintenance

Contents

Liebert STS2 Page Table of Contents Alarm and Faults Theory of Operation Communication Interfaces Liebert STS2 Touch Screen Display Specifications Event Message Help Text 17.0 Maintenance Figures Tables Important Safety Instructions Overview of Manual Safety Precautions Unpacking and Inspections External InspectionsUnloading and Handling Unit Preparation Internal InspectionsHandling Considerations Heat Output Recommended Minimum Service ClearancesOperating Temperature Range 0 to 40C 32 to 104F Operating Environment Altitude Recommended derating for high altitude operation Leveling and Anchoring the Unit to the Floor Leveling of the Static Switch Without AnchoringLeveling and Anchoring the Static Switch Using Floor Stand Locating the Liebert STS2 Input And Output Power Connections Power and Control Wiring Rating Max. number and size Input Junction Box Installation-OptionalInput/output conduit plate specifications Length Width Height Switch Rating Inches mm Input junction box dimensionsInput junction box terminal wire size range Switch Rating Power and Ground Lug Wire Range Source MICB1 MICB2 Isolation Transformer Control Wiring ConnectionsSystem Grounding CB4 CB3 Terminal block 1 and terminal block 2 wire connections Remote Source Selection WiringPower Supply Remote source selection terminal block Options Programmable Relay BoardOptimized Transfer Programmable relay board pinout Liebert IntelliSlot SNMP/Web/Modbus 485 Card Input Contact Isolator BoardComms Board Remote Source Selection Key Lockout SwitchLED Display Redundant Output Breaker Seismic Floor Stand Input Junction Boxes and CablesSeismic Floor Anchors Installation Drawings Detail a Rev PS211800 Rev PS211101 Rev PS211401 PS211801 Seismic anchor Liebert STS2 STS2 Front System Seismic ANCHORING, Figure ONE-LINE Diagram Rev Section A-A ONE-LINE Diagram PS212401 Single output Drawing 800 1000 amp Liebert STS2 withBreaker PS212801 Liebert STS2 non-automatic circuit breaker schedule ABB Control connection location diagram 100 600 amp Liebert STS2 See Option Location Detail Control Wiring Front View with Front Door Removed Option Location Detail See Note J73 J71J72 J74 Control wiring for the input contact isolator board option Table J51 02-810015-XX DB-9 ConnectionNo customer Connection No customer Control wiring for the RS-232 port TXD RXD GND Input Junction BOX Mimic Symbol Description Installation drawing, seismic floor stand 100-250A Installation drawing Seismic floor stand 100-250A Installation drawing, seismic floor Stand 100-250A PS215003 Rev Height Table Hardware Torque ChartDrawing, seismic floor stand 400-600A PS216001 Rev Seismic floor stand 400-600A PS216002 Rev PS216003 Rev Installation drawing, seismic floor stand 800-1000A Seismic floor stand 800-1000A Front Right Isometric View Rear Right Isometric View Right Side View Front View Side ViewRight View Redundancy System DescriptionIntroduction to Liebert STS2 Operations Modes of Operation Operator Controls Bypass General Description Theory of Operation SCR Failure Emergency TransferLoad Current Transfer Inhibit 7 On/Off Sequence Hardware Detailed Component DescriptionControls Operator Interface Firmware SCRs Audible AlarmCircuit Breakers Logic Modules Operating Instructions for the Touch Screen Interface Normal System Startup Manual Transfer / Preferred Source Selection Source transfer screen To manually select the preferred source Maintenance BypassEnabling Remote Source Selection Viewing Slot for the Source 2 Gate Drive Board Touch Screen Viewing Slot for the Source 1 Gate Drive Board To return to normal mode Bypass Procedures for SourceTo bypass the switch for Source Normal System Shutdown Shutdown in Static Transfer Switch ModeShutdown in Maintenance Bypass Mode Alarm and Faults Event Mask History Log Event and History LogsEvent Log Alarm Notes List of Messages Alarm Message Description/Cause Action Event messages See Configuring the Input Contact Isolator Settings on Using the RS-232 Port Communication Interfaces Keys Function Connecting and Using a TerminalTerminal commands Item Parameter Configuring the Liebert STS2 via the TerminalGroups Parameter Value types Group settings and valuesValue Parameter User Event Mask Comms Options Setting Bitpacked Options with the TerminalOptions1 Binary-hexadecimal conversions Critical Option EnablingNon-Critical Option Enabling Hex Putting the Terminal Command Together Setting Event Masks with the Terminal Examples of Event Mask Settings Display Overview Liebert STS2 Touch Screen Display Menu Overview Backspace To set or reset the password Using the Optional Key Lockout SwitchUsing the Password Changes disabled Changes enabled Event Controls Configuration MenuMimic Display Event Display To set the event masks User SettingsTo access the User Settings dialog box User settings dialog box Source Set Points Sepoint parameters To configure the setpoints for each sourceButton Range Default Comments Liebert STS2 Touch Screen Display Comm Options System SettingsTo access the System Settings menu Option buttons Configuring the Modem To configure the modem Configuring Pager Support Configuring the Input Contact Isolator Settings To configure the Input Contact Isolator relays Relay Setting Definition Configuring the Programmable Relay Board SettingsStandard settings for programmable relays Configuring the Liebert IntelliSlot SNMP/Web/Modbus 485 Card System Options Liebert SiteScan ConfigurationSaving Your Communications Configurations Dual Output Breaker Shunt Pole Transfer SwitchSystem ID Wye Output Transformer 13.11.2History Log Logs13.11.1Event Log To use the Event Log Cleaning the LCD Touch Screen Startup ProcedureBypass Procedure Source Transfers Front Panel Controls LEDs and Buttons and Key Lockout SwitchOperating the Liebert STS2 LED Display Description Action LED and Push Button DescriptionLED and push button description Cause. See 12.0 Communication Interfaces for PC terminal Key Lockout Switch Event Controls Operations Normal System Startup Manual Transfer / Preferred Source Selection Maintenance Bypass 109 When the Liebert STS2 is operating on bypass Normal System Shutdown Frequency System ConfigurationSpecifications Input/Output Voltage Input Surge Suppression GroundingElectrical Requirements Response Time Casters, Leveling and Seismic Anchoring System ComponentsFrame and Enclosure Cooling Doors AccessCable Entrance Color Graphical Display or LED Display Terminal Port Connections Pin Signal Name Function / Comments15.2.9 RS-232 Port MTA plug pinout 15.2.11 RS-232 Interface Parameters RS-232 settingsParameter Setting Fuseless Design S1 SCR Short Event Message Help TextKey S2 SCR Short S2 SCR Open 119 120 S1 SCR Sense Fail S1 Volt Sense FailS2 Volt Sense Fail S2 Curr Sense Fail S2 SCR Sense FailS1 Curr Sense Fail S1 Gate Drive Fail S2 Gate Drive Fail Heat Sink Overtemp S1 OV S1 UVS1 UV RMS S2 UV S1 OF/UFS1 Fail S2 UF/OF S2 UV RMSS2 OV S2 Fail S1 I-PEAK S2 I-PEAK 130 CB5 S1 BYP Closed 132 133 134 135 136 137 Proper Tightening of Nuts and Bolts Testing the Liebert STS2Maintenance Changing the Air Filter Support Information Programmable Relay Board Settings Record Channel Channel PRB Notes Input Contact Isolator Settings Record Page Twor k Ne tIs t Care