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POWER AVAILABILITY
MAINTENANCE BYPASS CABINET FOR NFINITY
& GXT 10KVA
USER MANUAL
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TABLE OF CONTENTS IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 GLOSSARY OF SYMBOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 1.0 GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 1.1 System Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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8.0 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23 8.1 Proper Care. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 8.2 Scheduled Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 8.2.1 Replacing Fan FiltersTransformer Models Only . . . . . . . . . . . . . . . . .
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IMPORTANT SAFETY INSTRUCTIONS SAVE THESE INSTRUCTIONS This manual contains important instructions that should be closely followed during installation and maintenance of this Maintenance Bypass Cabinet. This product is designed for commercial/industrial use only. This product is not intended for use with life support and other designated critical devices. Maximum load must not exceed that shown on the UPS and the Maintenance Bypass Cabinet rating label. WARNING ! Lethal voltages may be prese
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GLOSSARY OF SYMBOLS Risk of Electrical Shock Indicates Warning or Caution Followed by Important Instructions AC Input AC Output Requests the user to consult the manual i Equipment Grounding Conductor ON OFF 2
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General Description 1.0 GENERAL DESCRIPTION Congratulations on your purchase of Lieberts Nfinity Maintenance Bypass Cabinet with Config- urable Output Distribution. As with every Liebert product, we stand behind our quality. If you have any questions concerning this Maintenance Bypass Cabinet, please feel free to contact your local dealer, Liebert representative, or call the appropriate Technical Support number listed on the back of this manual. To ensure proper installation and operation
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General Description Figure 1 Front view Output breaker (CB1) Bypass availability UPS output indicator (amber) availability indicator (green) Bypass switch (SW1) UPS input power present (amber) UPS input switch (SW2) Cooling fans (transformer models only) Support bracket 4
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General Description Figure 2 Rear view (without transformer) Configurable output distribution (optional) Hardwire output (standard) Hardwire output terminal block (TB5) UPS input (TB3) UPS output (TB4) Maintenance bypass Maintenance bypass input (TB2) input (TB1) Support bracket 5
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General Description Figure 3 Rear view (with transformer) Configurable output distribution (optional) Hardwire output (standard) Hardwire output terminal block (TB6) UPS output (TB5) Tap selector (TB4) Maintenance bypass UPS input (TB3) input (TB1) (TB2) Support bracket 6
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Modes of Operation 2.0 MODES OF OPERATION The Nfinity Maintenance Bypass Cabinet is designed to operate in two modes: UPS Mode and Bypass Mode. 2.1 UPS Mode While the Nfinity Maintenance Bypass Cabinet is in UPS Mode, the UPS is supplying the connected load with continuous, high quality AC power. In this mode of operation, the load is protected by the UPS. The Bypass Switch rotated toward the green lamp indicates this mode. 2.2 Bypass Mode When the Nfinity Maintenance Bypass Cabinet is in the
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Major Components 3.0 MAJOR COMPONENTS The following is a general description of each component and its functions. Please review this section carefully, as it will give you a better understanding as to how the Nfinity Maintenance Bypass Cabi- net operates. 3.1 Bypass Switch The Bypass Switch allows easy and rapid transfer of connected loads between the UPS and Bypass source. 3.2 User Selectable Output Distribution Several receptacle and hardwire options are available as user selectable output d
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Preparation 4.0 PREPARATION These installation instructions provide all the information needed for positioning the Nfinity Mainte- nance Bypass Cabinet (including environmental requirements) and for connecting the input and out- put power cables. 4.1 Inspection Upon receiving the Nfinity Maintenance Bypass Cabinet, examine the packaging for any signs of mis- handling or damage. If any damage is noted, contact your local dealer or Liebert representative and notify your carrier. 4.2 Environment T
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Unloading 5.0 UNLOADING The unit frame is bolted to the shipping pallet to ensure safety. Liebert recommends using a pallet jack to transport the unit to its operating location prior to unbolting the unit. 5.1 Unloading the Maintenance Bypass Cabinet CAUTION ! This Maintenance Bypass Cabinet is heavy (see weight in Table 2). At least two people should assist to unload it from the pallet. 1. Once the Maintenance Bypass Cabinet is near the desired operating location, remove the cardboard cover
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Unloading 5.2 Stationary Mounting Additional stability can be added by bolting the mounting brackets (used in shipping) to the floor. Mounting bracket on rear of unit For greater stability, use a higher-grade bolt. Refer to the dimensions below when drilling holes for stationary mounting. 4-3/4" 4-3/4" (120 mm) (120 mm) 28" (711 mm) 5/16" (8mm) diameter 6 places Top View of Maintenance Bypass Cabinet 11 Centerline of Unit
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Cable Installation 6.0 CABLE INSTALLATION 6.1 Wiring Preparation WARNING ! Please read this section thoroughly before attempting to install wiring to this unit. Be sure that the unit is not connected to any AC mains power source or UPS before installing any wir- ing to this unit. This Maintenance Bypass Cabinet should be installed by a qualified / certified electri- cian. 6.2 Preparing Internal Wiring The Maintenance Bypass Cabinet is factory-configured for single-source installations. If your i
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Cable Installation Figure 7 Maintenance Bypass Cabinet with transformer Input 2 TB2 Transformer CB1 Single input jumper Output (remove for dual TB4 Breaker input feeds) 208/240V Output Tap Selector SW2 TB1 UPS Input Input 1 Switch TB6 SW1 Bypass Switch TB3 TB5 UPS Input UPS Output Figure 8 Maintenance Bypass Cabinet without transformer Input 2 Output TB5 TB2 Single input jumper SW1 CB1 (remove for dual input feeds) Bypass Output Switch Breaker SW2 TB1 UPS Input Input 1 Switch TB3 TB4 UPS Inpu
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Cable Installation 6.4 Removing the Cover Plates On the back of the Maintenance Bypass Cabinet, cover plates are over the input and output terminals (see illus- tration at right). Remove these using a phillips screw- driver. Keep screws and plates to one side. 6.5 Power Cable Installation Refer to Table 3 below when selecting cables. Table 3 Nfinity power cable and protection ratings Models NMB1x & NMB4x Max Input Current 100 A Input Protection 100 A Max Output Current 100 A 2 ) Input/ Output M
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Cable Installation 6.7 Input and Output Wiring NOTE Input wiring must be installed using conduit. 208 input voltage jumperif only the connections for 208 VAC are made between the UPS and theNfinity Maintenance Bypass, the 208 input voltage jumper must be installed for proper operation. To install this jumper, place the jumper wire provided in the accessory kit between Pin 1 and Pin 2 on TB4. To connect the input wiring: 1. Locate the input wiring access (see illustration at right). 2. Remov
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Cable Installation Figure 9 Electrical connectionstransformer model MBC 120V 120V 240V Common Ground 208V Wire Connection Torque Common Ground Value: 13 in-lbs Wire Connection Torque Value: 120 in-lbs Common Ground TB6 Hardwire Output Wire Connection Torque Terminal Block Value: 120 in-lbs Wire Connection Torque Value: 35 in-lbs Wire Connection Torque Value: 120 in-lbs TB5 UPS Output TB4 Tap Selector Terminal Block Terminal Block Wire Connection Torque Wire Connection Value: 28 in-lbs Tor
