AC Power For Business-Critical Continuity Liebert Maintenance Bypass Cabinet User Manual - Wall-Mountable
TABLE OF CONTENTS IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 GLOSSARY OF SYMBOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 1.0 GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 1.1 System Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FIGURES Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Front view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Rear view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Maintenance Bypass Cabinet in UPS Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IMPORTANT SAFETY INSTRUCTIONS SAVE THESE INSTRUCTIONS This manual contains important instructions that should be closely followed during installation and maintenance of this wall-mountable 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 1.0 GENERAL DESCRIPTION Congratulations on your purchase of Liebert’s wall-mountable Maintenance Bypass Cabinet. As with every Liebert product, we stand behind our quality. If you have any questions concerning this wallmountable 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.
General Description Figure 1 Front view Bypass Mode Indicator Lamp UPS Mode Indicator Lamp Lockout/Tagout Door SW1 CB1 SW2 Figure 2 Rear view End cover plate (removable for internal inspection) TB6 Slot for wall-mount arrangement (one of four) End plate (remove during cable installation) Knockout for cable entrance (one of five) Grounding lug 4
Modes of Operation 2.0 MODES OF OPERATION The Maintenance Bypass Cabinet is designed to operate in UPS mode and Bypass mode. The mode is selected using the Bypass Switch. 2.1 Bypass Switch The Bypass Switch allows easy and rapid transfer of connected loads between the UPS and Bypass source. 2.2 UPS Mode While the Maintenance Bypass Cabinet is in the 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.
Modes of Operation 2.3 Bypass Mode When the 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. The amber lamp illuminated in the Maintenance Bypass Switch compartment indicates bypass is available.
Preparation 3.0 PREPARATION These installation instructions provide all the information needed for positioning the Maintenance Bypass Cabinet (including environmental requirements) and for connecting the input and output power cables. 3.1 Inspection Upon receiving the Maintenance Bypass Cabinet, examine the packaging for any signs of mishandling or damage. If any damage is noted, contact your local dealer or Liebert representative and notify your carrier. 3.
Preparation 3.5 Mounting the Cabinet This Maintenance Bypass Cabinet may be placed on the floor or mounted on a wall. In both cases, ensure that the unit is in a well-ventilated area with at least 12 inches (305 mm) clearance for access to the switches and cable connections. When placing the cabinet on the floor, install the four rubber feet provided with the unit. One rubber foot goes on each corner of the unit on the side where keyhole slots have been cut.
Cable Installation 4.0 CABLE INSTALLATION 4.1 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 wiring to this unit. This Maintenance Bypass Cabinet should be installed by a qualified / certified electrician. 4.1.1 Preparing Internal Wiring The Maintenance Bypass Cabinet is factory-configured for single-source installations.
Cable Installation 4.2.1 Removing the Cover Plates Plates cover the input and output terminals on the back of the Maintenance Bypass Cabinet (see illustration below). Remove these using a T-20 Torx screwdriver. Keep screws and plates to one side. Figure 7 Cover plate removal Remove these screws to open end plate and cover plate. This screw and a second screw underneath unit serve as hinges to open end plate. Remove these screws to open end plate and cover plate (fourth screw is underneath unit). 4.
Cable Installation 4.3.1 Input/Output Wiring (TB1) Follow the steps below to connect the input wiring: NOTE Input wiring must be installed using conduit. 208 input voltage jumper—if only the connections for 208 VAC are made between the UPS and the 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. 1.
Cable Installation Figure 8 Maintenance Bypass Cabinet Input 2 TB5 TB2 Single input jumper (remove for dual input feeds) TB1 Input 1 SW2 UPS Input Switch CB1 Output Breaker SW1 Bypass Switch TB3 UPS Input SW1 Bypass Switch TB6 N/C C N/0 12 TB4 UPS Output Output
Cable Installation Figure 9 Connecting Maintenance Bypass to GXT10000T-208X 120V TB2 L1 Input 2 NFINITY MAINTENANCE BYPASS CABINET WITHOUT TRANSFORMER TB5 2 N 3 4 Remove these three wires for dual source (see NOTE below) TB1 208V 1 L2 G 120V G L1 G L2 Input 1 N TB3 L1 G G TB4 L2 G 1 2 3 TB6 4 NO Common NC Flexible conduit GEC Flexible conduit L1 L2 Input N L1 L2 L2A Output External Battery GXT10000T-208X ! CAUTION It is mandatory to connect exactly as shown.
Cable Installation Figure 10 Connecting Maintenance Bypass to GXT10000T-240X 120V TB2 L1 Input 2 NFINITY MAINTENANCE BYPASS CABINET WITHOUT TRANSFORMER TB5 1 L2 2 N 3 4 Remove these three wires for dual source (see NOTE below) G TB1 120V 240V G L1 G L2 Input 1 N TB3 G L1 L2 TB4 G 1 2 3 4 G TB6 NO Common NC Flexible conduit Flexible conduit GEC L1 N L2 Input L1 L2 Output External Battery GXT10000T-240X NOTE 1.
Cable Installation Figure 11 Connecting Nfinity to Maintenance Bypass TB2 L1 Input 2 NFINITY MAINTENANCE BYPASS CABINET WITHOUT TRANSFORMER TB5 120 120 208 240 1 L2 2 N 3 4 Remove these three wires for dual source (see NOTE below) G TB1 L1 G L2 Input 1 G N G G TB3 L1 L2 G L1 L2 G TB4 2 3 4 1 TB6 NO Common NC Flexible conduit 1 2 3 TB1 Ensure that the tap selector is set to the correct input voltage 1 TB2 2 3 4 5 TB3 GEC See Nfinity user manual for details on connecting GEC.
Operating Procedures 5.0 OPERATING PROCEDURES 5.1 Start-Up and Initialization Follow these steps to start up the UPS while connected to the Maintenance Bypass. 1. 2. 3. 4. 5. Set the bypass switch (SW1) to the UPS position on the Maintenance Bypass Cabinet. Close the UPS source switch (SW2). Close the output circuit breaker (CB1). Close the UPS input circuit breaker. On GXT UPS models: • Close the UPS output circuit breaker. On Nfinity UPS models: • Close the control enable switch.
Maintenance 6.0 MAINTENANCE 6.1 Proper Care Keeping your Liebert 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 Maintenance Bypass Cabinet.
Specifications 7.0 SPECIFICATIONS General & Environmental NMBHW4x = 16kVA NMBHW8x = 20kVA Unit Rating NMBHW4x = 100A max NMBHW8x = 125A max Compliant Safety Standards UL 1778, c-UL Mechanical Dimensions - W x D x H, in. (mm) 21 x 8 x 18 (533 x 203 x 457) Weight, lb. (kg) 45 (20.5) Environmental Operating Temperature, maximum, °F (°C) 32° - 104° (0° - 40°) Relative Humidity 5 - 95% noncondensing Operating Altitude, maximum, ft.
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