POWER AVAILABILITY Maintenance Bypass Cabinet for Nfinity USER MANUAL
TABLE OF CONTENTS IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 GLOSSARY OF SYMBOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 System Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Features . . . . . . . . . . . .
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.
GLOSSARY OF SYMBOLS Risk of Electrical Shock Indicates Warning or Caution Followed by Important Instructions AC Input AC Output i Requests the user to consult the manual Equipment Grounding Conductor ON OFF 2
GENERAL DESCRIPTION Features Congratulations on your purchase of Liebert’s Nfinity™ Maintenance Bypass Cabinet with Configurable 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.
FRONT VIEW Output breaker (CB1) UPS output availability indicator (green) Bypass availability indicator (amber) Bypass switch (SW1) UPS input power present (amber) UPS input switch (SW2) Cooling fans (transformer models only) Support bracket 4
REAR VIEW (WITHOUT TRANSFORMER) Configurable output distribution (optional) Hardwire output (standard) Hardwire output terminal block (TB5) UPS output (TB4) UPS input (TB3) Maintenance bypass input (TB1) Maintenance bypass input (TB2) Support bracket 5
REAR VIEW (WITH TRANSFORMER) Configurable output distribution (optional) Hardwire output (standard) Hardwire output terminal block (TB6) UPS output (TB5) Tap selector (TB4) Maintenance bypass input (TB1) (TB2) UPS input (TB3) Support bracket 6
MODES OF OPERATION BYPASS MODE The Nfinity Maintenance Bypass Cabinet is designed to operate in the following modes: When the Nfinity Maintenance Bypass Cabinet is in the Bypass mode it provides an alternate path for power to the connected equipment. Should the UPS need to be taken out of service for limited maintenance or repair, manual activation of the bypass will cause an immediate transfer of the equipment from the UPS inverter to the bypass source.
MAJOR COMPONENTS 30 Amp Options L5-30R L6-30R-208 L6-30R-240 L14-30R-240 30A,120V, 1 pole breaker w/ 1/2" & 3/4" knockouts 30A,208V, 2 pole breaker w/ 1/2" & 3/4" knockouts 30A,240V, 2 pole breaker w/ 1/2" & 3/4" knockouts 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 Cabinet operates.
PREPARATION SITE PREPARATION These installation instructions provide all the information needed for positioning the Nfinity Maintenance Bypass Cabinet (including environmental requirements) and for connecting the input and output power cables. When deciding where to locate your Maintenance Bypass Cabinet, consider the weight and size of the unit. Make sure that the structural integrity of the floor can withstand the weight.
UNLOADING UNLOADING THE MAINTENANCE BYPASS CABINET ! CAUTION This Maintenance Bypass Cabinet is heavy (see weight in Dimensions table on page 9). 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. 3. Remove the metal ramp from the bottom of the pallet, rotating it 180°. Fit ramp onto opposite side of pallet (in slot) as shown below. 4.
STATIONARY MOUNTING 5. Once the Maintenance Bypass Cabinet is in the desired location, adjust the leveling feet to secure its position. Additional stability can be added by bolting the mounting brackets (used in shipping) to the floor. For greater stability, use a higher-grade bolt. Refer to the dimensions below when drilling holes for stationary mounting.
CABLE INSTALLATION WIRING PREPARATION ! Dual Source Configuration WARNING Modifying the wiring consists of removing the jumpers between TB1 and TB2 as described below: PLEASE READ THIS SECTION THOROUGHLY BEFORE ATTEMPTING TO INSTALL WIRING TO THIS UNIT. 1. Remove cover plates. 2. Identify TB1 and TB2. Be sure that the unit is not connected to any AC mains power source or UPS before installing any wiring to this unit.
REMOVING THE COVER PLATES POWER CABLE INSTALLATION On the back of the Maintenance Bypass Cabinet, cover plates are over the input and output terminals. Remove these using a phillips screwdriver. Keep screws and plates to one side.
INPUT WIRING (TB1) 3. Input power cables connect to hex terminals on the input terminal block. Connect the input wiring as stated in the following steps: 4. Insert the ground (earth) wire through the earth lug and tighten it to the proper torque value (22-26 in-lb). Then connect the wires to the block connections as shown below. Using a torque wrench, turn the screws clockwise until tightened to the proper torque value (22-26 in-lb). NOTE Input wiring must be installed using conduit.
Maintenance Bypass Cabinet With Transformer Input 2 TB2 Transformer Single input jumper (remove for dual input feeds) TB1 Input 1 SW2 UPS Input Switch CB1 Output Breaker TB4 208/240V Tap Selector Output SW1 Bypass Switch TB3 TB6 TB5 UPS Input UPS Output Maintenance Bypass Cabinet Without Transformer Input 2 TB5 TB2 Single input jumper (remove for dual input feeds) TB1 Input 1 SW1 Bypass Switch CB1 Output Breaker SW2 UPS Input Switch TB3 TB4 UPS Input UPS Output 15 Output
UPS to Maintenance Bypass With Transformer 120 120 208 240 TB2 L1 Input 2 L2 G Remove these two wires for dual source 4 TB1 L1 Input 1 TB6 1 2 3 NFINITY MAINTENANCE BYPASS CABINET WITH TRANSFORMER G G L2 G TB3 L1 L2 G TB4 1 2 3 208 TB5 2 3 4 1 G 240 Flexible conduit L1 L2 G 1 2 3 1 2 3 4 5 GEC TB1 Ensure that both tap selectors are set to the correct input voltage TB2 TB3 See Nfinity user manual for details on connecting GEC. NFINITY UPS NOTES 1.
UPS to Maintenance Bypass Without Transformer TB2 L1 Input 2 L2 N TB5 120 120 208 240 1 2 3 NFINITY MAINTENANCE BYPASS CABINET WITHOUT TRANSFORMER 4 Remove these three wires for dual source G TB1 G L1 Input 1 G L2 N G G TB3 L1 L2 G L1 L2 G 1 TB4 2 3 4 Flexible conduit 1 2 3 TB1 Ensure that the tap selector is set to the correct input voltage TB2 1 2 3 4 5 TB3 GEC See Nfinity user manual for details on connecting GEC. NFINITY UPS NOTES 1.
OPERATING PROCEDURES START-UP AND INITIALIZATION TRANSFERRING SYSTEM FROM UPS TO MAINTENANCE BYPASS OPERATION Follow these steps in order to start up the Nfinity UPS while connected to the Nfinity Maintenance Bypass. 1. Verify that the amber bypass lamp is illuminated 1. Set Maintenance Bypass switch (SW1) to UPS position on Maintenance Bypass Cabinet. 2. Turn the bypass switch (SW1) to the bypass position on the Maintenance Bypass Cabinet.
MAINTENANCE PROPER CARE REPLACING FAN FILTERS Keeping your Liebert Nfinity Maintenance Bypass Cabinet operating properly is imperative to optimal performance and life of the unit. It is recommended that a certified technician perform preventive and corrective maintenance. Liebert Global Services (LGS) is dedicated to ensuring the highest level of performance and unmatched support for your Nfinity Maintenance Bypass Cabinet.
SPECIFICATIONS General & Environmental Rating Models NMB1x and NMB4x = 18 kVA Models NMB5x and NMB8x = 20 Unit Rating Models NMB1x and NMB4x = 100 max Amps Models NMB5x and NMB8x = 125 max Compliant Safety Standards UL 1778, c-UL Mechanical Width Depth Dimensions 9.5 (241) In (mm) 26.5 (700) Height 30.
POWER AVAILABILITY Maintenance Bypass Cabinet for Nfinity USER MANUAL The Company Behind the Products With over a million installations around the globe, Liebert is the world leader in computer protection systems.
