ONTENTS Chapter 1 Introduction Related Publications ..................1-1 Getting Assistance from Reliance Electric............1-1 Chapter 2 About the Drive Identifying the Drive by Model Number ............2-1 Enclosure Ratings ................... 2-2 B-Frame LiquiFlo Drive Component Locations..........2-2 C-Frame LiquiFlo Drive Component Locations ..........2-4 D-Frame LiquiFlo Drive Component Locations ..........
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Chapter 4 Mounting the Drive, Grounding, and Finding Wire Routing Locations Lifting and Mounting the Drive .................4-1 4.1.1 Verifying the Drive’s Watts Loss Rating..........4-2 Determining Input, Motor Output, Ground, and Control Wire Routing for the Drive ..................4-2 Installing the DC Bus Reactor Fan (C-Frame Drives Only)......4-6 Grounding the Drive ..................4-7 Connecting Coolant Lines ................4-7 4.5.1 B-Frame Coolant Connections ..............4-7...
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Appendix D C-Frame LiquiFlo Drive Wiring Diagrams ..............D-1 Appendix E D-Frame LiquiFlo Drive Wiring Diagrams ..............E-1 Contents...
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List of Figures Figure 2.1 – Identifying the Drive Model Number ............. 2-1 Figure 2.2 – B-Frame LiquiFlo Drive Component Locations........2-3 Figure 2.3 – C-Frame LiquiFlo Drive Component Locations ........2-5 Figure 2.4 – D-Frame LiquiFlo Drive Component Locations ........2-7 Figure 2.5 –...
HAPTER Introduction This instruction manual describes the LiquiFlo drive’s Power Module and regulator hardware. It does not cover the LiquiFlo software. For software information, refer to the LiquiFlo AC General Purpose (V/Hz) and Vector Duty Drive Software Start-Up and Reference Manual (D2-3410). This manual is intended for qualified electrical and plumbing personnel.
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HAPTER About the Drive This chapter describes how to identify the drive using the model number matrix and shows the major drive components. The LiquiFlo AC drive is a PWM (pulse-width-modulated) liquid-cooled drive that provides vector and general purpose regulation for a wide range of applications. Using vector regulation, the drive can provide high dynamic response, maintain full rated motor torque to zero speed, and precisely control motor speed in both directions.
Table 2.1 – Power and Enclosure Ratings Frame Size and Input Input Output Current Full Load Model Selected Enclosure Power Current at 2 kHz** Power Loss Watts Number Regulation* Rating (KVA) (Amps) (Amps) Fluid / Air 41L4060 B-Frame Open-Chassis 4600 / 1100 41LR4060 V/Hz or Vector Style...
2.4 C-Frame LiquiFlo Drive Component Locations The C-Frame LiquiFlo drives have the following main components. The numbered items listed below provided correspond to the numbers used in figure 2.3. Replacement parts are listed in chapter 9. Bus Bars (AC Input) SCR Bridge (AC to DC Converter) Power Module Adapter Printed Circuit Board (PCB) Power Interface Harness...
2.5 D-Frame LiquiFlo Drive Component Locations The D-Frame LiquiFlo drives have the following main components. The numbered items listed below provided correspond to the numbers used in figure 2.4. Replacement parts are listed in chapter 9. Chillplate Harness Bus Bars (AC Input) Bus Bars (AC Output) Power Module Control PCB Membrane Switch Keypad...
2.6 Regulator Board Description LiquiFlo drive regulation is performed by a microprocessor on the Regulator board. See figure 2.5. Drive operation is adjusted by the parameters entered through the keypad. The Regulator board accepts power circuit feedback signals and an external speed reference signal, as well as data from an encoder that is attached to the motor when set up for FVC regulation.
2.6.1 Jumper Locations and Settings Jumpers J4 and J17 on the Regulator board are factory-set for voltage in and voltage out signals. Refer to figure 2.5 for their locations on the Regulator board. If you need to change the jumpers’ settings, use the following procedures. ATTENTION: Do not alter the setting of any jumper not described in this instruction manual.
Step 8. Verify that Terminal Strip Analog Input Offset (P.009), Terminal Strip Analog Input Gain (P.010), and Terminal Strip Analog Input Configure (P.011) are correctly set. Note that the jumper settings must match the software settings; otherwise, the reference value may differ from what is expected. Refer to the LiquiFlo Software Start-Up and Reference manual for more information.
Step 7. Reapply input power. Step 8. Verify that parameter P.012 is set correctly for either speed or current. Voltage Output Option Current Output Option Pins 2-3 Pins 1-2 +10 VDC 4-20 mA (default) Figure 2.7 – Jumper J17 Settings for Analog Outputs 2.6.2 Wiring the Regulator Board Terminal Strip The terminal strip on the Regulator board provides terminals for connecting customer I/O devices.
Factory Installed Configurable RS-232 Encoder Analog Analog Speed Status Relays Jumper Connections Connections Output Reference Digital Inputs (Isolated 24 VDC) Figure 2.8 – Typical Regulator Board Terminal Strip Connections 2.6.3 RS-232 Communication Port The Regulator board contains a 9-pin D-shell RS-232 communication port (J8). This port provides RS-232 communication between the LiquiFlo drive and a personal computer running the Control and Configuration (CS3000) software.
Refer to the appropriate board instruction manual for more information. Refer to section 2.8 of this manual for more information on optional drive kits. 2.6.5 Operator Interface Module Connector Flat-ribbon connector J7 provides a means of attaching the optional Operator Interface Module (OIM).
2.7 RMI Board Description The following signals are available at the RMI board terminal strip. Refer to figure 2.10 for terminal identification. For a detailed description of the RMI board signals, refer to section 7.4. 2.7.1 Digital Inputs Four 24 volt DC digital inputs provide additional speed reference options. The inputs are active high.
2.7.7 Wiring the RMI Board Terminal Strip ATTENTION: You are responsible for conforming with all applicable local, national, and international codes. Failure to observe this precaution could result in damage to, or destruction of, the equipment. Refer to figure 2.10 for the signal and control I/O terminal connections on the RMI board.
HAPTER Planning the Installation This chapter provides how to plan a LiquiFlo drive installation. ATTENTION: Only qualified electrical personnel familiar with the construction and operation of this equipment and the hazards involved should install, adjust, operate, or service this equipment. Read and understand this manual and other applicable manuals in their entirety before proceeding.
• Do not install the drive above 1000 meters (3300 feet) without derating output power. For every 91.4 meters (300 feet) above 1000 meters (3300 feet), derate the output current 1%. • Verify that the drive location will meet the environmental conditions specified in table 3.1.
.563" Thru 4 Places F (Typ. 4 Pl.) G (Typ. 4 Pl.) Front View (Control Panel Assembly and Bus Laminate Removed) Right Side View Figure 3.2 – C-Frame Drive Dimensions LiquiFlo AC Power Modules, Hardware Reference Version 6.4...
3.1.3 Verifying the Site Provides for Recommended Air Flow Clearances Be sure there is adequate clearance for air circulation around the user-supplied enclosure. A 6-inch minimum clearance is required wherever vents are located in the cabinet. 3.1.4 Verifying Power Module Input Ratings Match Supplied Power It is important to verify that plant power will meet the input power requirements of the LiquiFlo drive’s Power Module circuitry.
Table 3.3 – Recommended Power Wire Sizes for B-Frame Drives Drive M/N 41L4060, 41LR4060 Type of Power Wiring with kit M/N 41L4060PM AC Input Power (R/L1, S/L2, T/L3) Output Power (U/T1, V/T2, W/T3) accepts two (2) 300 MCM to 6 AWG conductors Delta-Wye Transformer (S1 to S6) Ground (PE)
Table 3.6 – Recommended Terminal Strip Wire Sizes Terminals Wire Size 1 to 31 (Regulator) 20 to 14 AWG, 2 to 0.5 (mm 41 to 69 (RMI) 3.2.2.4 Recommended Motor Lead Lengths Motor lead lengths can total up to 76 meters (250 feet). 3.2.2.5 Recommended Serial Communication Cable Lengths Connector J8 on the Regulator boards is an RS-232 serial communication port.
Table 3.7 – AC Input Line Fuse and Circuit Breaker Selection Values Input Voltage Motor Circuit Protector Model Number (+/-10%) Fuse Rating or Circuit Breaker 41L4060 380-480 VAC 600 A 600 A 41LR4060 50LW4060 380-480 VAC 800 A 750 A 50LR4060 64LW4060 380-480 VAC...
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HAPTER Mounting the Drive, Grounding, and Finding Wire Routing Locations This chapter shows how to mount the drive and properly ground it. Also shown are the entry areas where wiring is to be routed in and out of the drive. 4.1 Lifting and Mounting the Drive Use the following procedure to lift the LiquiFlo drive and mount it in the required enclosure:...
In order to maintain a flat mounting surface and to ensure that bolt tightness is maintained, use flat washers and split-ring lock washers under the bolt heads. Refer to table 3.2 and figures 3.1 to 3.3 for drive mounting dimensions. Use the following user-supplied mounting bolts and washers on C-frame drives: 1/2”-13, UN/UNC-2A, Grade 2.
Drive Input Wiring Drive Output Wiring To Motor (3 Places) User Connections Coolant Connections Figure 4.2 – Wire Routing Locations for C-Frame LiquiFlo Drives LiquiFlo AC Power Modules, Hardware Reference Version 6.4...
Drive Input 6 Places Drive Output To Motor Front View User Control Left Side View Connections User Control Wire Openings Bottom View Figure 4.3 – Wire Routing Locations for D-Frame LiquiFlo Drives Mounting the Drive, Grounding, and Finding Wire Routing Locations...
4.3 Installing the DC Bus Reactor Fan (C-Frame Drives Only) A fan must be installed in the LiquiFlo drive enclosure to keep the DC bus reactor at the proper operating temperature. The fan should be a Comair Rotron M/N PT2B3 rated at 0.26 amps, 31 watts, 235 CFM (115 VAC, 60 Hz), or equivalent.
4.4 Grounding the Drive ATTENTION: The user is responsible for conforming with all applicable local, national, and international codes. Failure to observe this precaution could result in damage to, or destruction of, the equipment. Use the following steps to ground the drive: Step 1.
not be powered unless the drive is also powered. Failure to do this may result in condensation accumulating on the casting and/or circuit boards, which could damage the drive. 4.5.3 D-Frame Coolant Connections D-frame LiquiFlo drives have inlet and outlet coolant connections as shown in figure 4.7.
Hose assemblies are provided with the drive. Hose Coolant Outlet assemblies of Connection longer length are provided with kit M/N 64L4060PM, or can be user- Coolant Inlet supplied. Connection Figure 4.6 – Coolant Connector Locations for C-Frame LiquiFlo Drives Tube assemblies, gaskets, and hardware are provided with kit M/N 120L4060PM, or...
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HAPTER Installing Input Power Wiring This chapter describes incoming line components and how to install them. 5.1 Installing Transformers and Reactors (Optional) The LiquiFlo AC drive may be used on distribution systems with 85,000 amps or less symmetrical fault current capacity. Line reactors are not needed for safe operation of the drive but may be required to reduce line harmonics.
3-Phase AC Input Voltage 380/480 V Manual Disconnect User-Supplied Fuse Interconnecting bus bar provided with M/N 41L4060PM, 64L4060PM, or 120L4060PM kit, or can be user-supplied. (PE) LiquiFlo Power Module User-Supplied Figure 5.1 – Typical AC Input/Output Electrical Connections (6-Pulse Rectifier, All Frames) LiquiFlo AC Power Modules, Hardware Reference Version 6.4...
5.3 Installing a Required External/Separate Input Disconnect An input disconnect must be installed in the line before the drive input terminals in accordance with local, national, and international codes (e.g., NEC/CEC). The disconnect should be sized according to the in-rush current as well as any additional loads the disconnect might supply.
HAPTER Installing Output Power Wiring This chapter provides instructions on wiring output contactors, motor overload protection, and output wiring to the motor. 6.1 Installing Output Contactors (Optional) Output contactors provide a positive means of disconnecting the motor from the drive. If the application requires the use of output contactors, contact Reliance Electric for assistance.
6.3 Installing Output Wiring from the Drive Output Terminals to the Motor Important: The total motor lead length must not exceed 76 meters (250 feet). Use the following steps to connect the AC output power wiring from the drive to the motor: Step 1.
HAPTER Wiring the Regulator Board and RMI Board Terminal Strips This chapter describes how to wire the Regulator board and RMI board terminal strips for stop, encoder feedback, and remote control signals. The signals available through the Regulator board terminal strip are shown in tables 7.1 to 7.7 and figures 7.1 and 7.2.
Table 7.3 – Analog Output Connections (Terminals 10 and 11) Terminal # Signal Analog Meter Output Regulator Common Notes: The output of this terminal is either 0-10 VDC or 4-20 mA as determined by the setting of jumper J17 on the Regulator board. The analog output must also be programmed via parameter P.012 for an indication of speed and direction or percent of torque.
Table 7.5 – Digital Input Connections (Terminals 16-25) Terminal # Signal +24 VDC (Current Limited) (For remote control digital inputs only) Digital Input 8 (Remote/Local) - Programmable Digital Input 7 (Ramp1/Ramp2) - Programmable Digital Input 6 (Forward/Reverse) - Programmable Function Loss Run/Jog Reset Stop...
Table 7.7 – Status Relay Connections (Terminals 28-31) Terminal # Signal N.C Relay Contact N.C. Relay Common N.O. Relay Contact N.O. Relay Common Notes: Relay contact closure is programmable through parameter P.013. Refer to the LiquiFlo Software Start-Up and Reference manual for more information. LiquiFlo AC Power Modules, Hardware Reference Version 6.4...
Remote 4-20 mA Speed/Torque Reference 5K ohm +20 mA Function Loss Important: A maintained function loss switch should be used if P.054 (Level Sense Start Enable) = ON and P.026 (Function Loss Response) = 1. Reset Start/Stop Figure 7.1 – Two-Wire Start/Stop Sample Control Wiring Wiring the Regulator Board and RMI Board Terminal Strips...
Remote 4-20 mA Speed/Torque Reference 5K ohm +20 mA Function Loss Important: A maintained function loss switch should be used if P.054 (Level Sense Start Enable) = ON and Reset P.026 (Function Loss Response) = 1. Stop Start Figure 7.2 – Three-Wire Start/Stop Sample Control Wiring LiquiFlo AC Power Modules, Hardware Reference Version 6.4...
7.1 Stopping the Drive ATTENTION: When P.055 is set to ON, the STOP/RESET key is functional only from the selected control source. As a safety precaution, Reliance recommends that an emergency stop push button be located near the drive in an easily accessible location. As a further safety precaution, the user should post a warning on the drive to alert personnel that the STOP/RESET key is not functional.
7.2 Wiring the Encoder Feedback Device (FVC Regulation Only) If the LiquiFlo drive is programmed to provide FVC regulation, an encoder must be installed. Drives using V/Hz or SVC regulation do not require the use of an encoder feedback device. The encoder connects to terminals 4 to 9 of the regulator’s terminal strip: Terminal Encoder Connection...
7.3 Wiring the Signal and Control I/O Wire the drive’s signal and control I/O to the Regulator board terminal strip as shown in table 7.8. Table 7.8 – Wiring Signal and Control I/O to the Regulator Board Terminal Strip Terminal Number Description Parameters/Wiring Connections...
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Table 7.8 - Wiring Signal and Control I/O to the Terminal Strip (Continued) Terminal Number Description Parameters/Wiring Connections Wiring Analog Outputs 0-10 VDC or 4-20 mA The setting of parameter P.012 selects the terminal strip Analog Output Reference analog output source (either speed or torque). Jumper J17 must also be set.
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Table 7.8 - Wiring Signal and Control I/O to the Terminal Strip (Continued) Terminal Number Description Parameters/Wiring Connections Wiring Analog Speed Reference Inputs Isolated Reference Voltage Related parameters: (+10VDC) • P.000: Control Source Analog Speed/Torque • P.009: Terminal Strip Analog Input Offset Reference Input Voltage (+/- 10VDC) •...
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Table 7.8 - Wiring Signal and Control I/O to the Terminal Strip (Continued) Terminal Number Description Parameters/Wiring Connections Wiring a Remote/Local Input +24 VDC Power Supply Current limited for remote input logic use only. Digital Input 8 Digital input 8 is control function programmable through (Default - Remote/Local) parameter P.007.
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Table 7.8 - Wiring Signal and Control I/O to the Terminal Strip (Continued) Terminal Number Description Parameters/Wiring Connections Wiring an Additional Ramp Input Digital Input 7 Digital input 7 is control function programmable through (Default - Ramp1/Ramp2) parameter P.007. The following parameters must be set: •...
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Table 7.8 - Wiring Signal and Control I/O to the Terminal Strip (Continued) Terminal Number Description Parameters/Wiring Connections Wiring a Forward/Reverse Input Digital Input 6 Digital input 6 is control function programmable through (Default - Forward/Reverse) parameter P.007. The following parameters must be set: •...
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Table 7.8 - Wiring Signal and Control I/O to the Terminal Strip (Continued) Terminal Number Description Parameters/Wiring Connections Wiring a Function Loss Input Digital Input 5 The following parameters must be set: (Function Loss) • P.026:Function Loss Response A signal must be present at terminal 20 for the drive to be able to start.
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Table 7.8 - Wiring Signal and Control I/O to the Terminal Strip (Continued) Terminal Number Description Parameters/Wiring Connections Wiring the Reset Input Digital Input 3 The following parameter must be set: (Reset) • P.000: Control Source Terminal 22 On = Reset Wiring the Stop/Start Inputs Digital Input 2 The following parameter must be set:...
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Table 7.8 - Wiring Signal and Control I/O to the Terminal Strip (Continued) Terminal Number Description Parameters/Wiring Connections Wiring the Output Status Relays Normally-Closed Contact Both Form A and Form B contacts are rated for 250 VAC/ (Form B) 30 VDC at 5 amps resistive or 2 amps inductive load. Normally-Closed Contact The following parameter must be set: Common (Form B)
7.4 Wiring the RMI Board Terminal Strip ATTENTION: You are responsible for conforming with all applicable local, national, and international codes. Failure to observe this precaution could result in damage to, or destruction of, the equipment. Refer to figure 7.4 for the signal and control I/O terminal connections on the RMI board.
Table 7.9 – Wiring Signal and Control I/O to the RMI Board Terminal Strip Terminal Related Parameters, Specifications, and Number Description Jumpers Digital Inputs, Control Voltage Output Digital Input 1 The four digital inputs are configured using Digital Input 2 parameter r.030.
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Table 7.9 – Wiring Signal and Control I/O to the RMI Board Terminal Strip (Continued) Terminal Related Parameters, Specifications, and Number Description Jumpers Analog Outputs Analog Output No. 1 Configuration: r.001 0 to 10 VDC Offset: r.002 Gain: r.003 Analog Output No. 2 Configuration: r.004 –...
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HAPTER Completing the Installation This chapter provides instructions on how to perform a final check of the installation before power is applied to the drive. ATTENTION: Only qualified electrical personnel familiar with the construction and operation of this equipment and the hazards involved should start and adjust it.
Step 10. Check the motor installation and length of motor leads. Step 11. Disconnect any power correction capacitors connected between the drive and the motor. Step 12. Check that the rating of the transformer (if used) matches the drive requirements and is connected properly. Step 13.
HAPTER Troubleshooting the Drive This chapter describes how to troubleshoot the drive and the equipment that is needed to do so. Also provided are replacement part lists and information on clearing faults. 9.1 Test Equipment Needed To Troubleshoot An isolated multimeter will be needed to measure DC bus voltage and to make resistance checks.
Step 3. Measure the DC bus potential with a voltmeter while standing on a non-conductive surface and wearing insulated gloves (1000 V). Measure the DC bus potential at the test points on the Power Module Interface board. See figure 9.1 for B-frame drives, figure 9.2 for C-frame drives, or figure 9.3 for D-frame drives.
9.4 Checking the Power Modules with Input Power Off Use the following procedure to check the drive’s Power Module circuitry with power off: ATTENTION: DC bus capacitors retain hazardous voltages after input power has been disconnected. After disconnecting input power, wait five (5) minutes for the DC bus capacitors to discharge and then check the voltage with a voltmeter to ensure the DC bus capacitors are discharged before touching any internal components.
Table 9.1 – Resistance Checks Input Meter Diode Connection Component is OK if resistance (R) is: Component is defective if: 10 < R < 1 megohm Continuity (short circuit) or open when the meter is connected with reversed polarity. * (+) DC Bus Volts power terminal ** (-) DC Bus Volts power terminal Table 9.1 - Resistance Checks (Continued) Meter...
9.5 Replacement Parts Tables 9.2, 9.3, and 9.4 list the replacement parts that are available from Reliance Electric. See figures 2.2, 2.3, and 2.4 for the location of the parts. Table 9.2 – B-Frame LiquiFlo Drive Replacement Parts Quantity M/N 41L4060 Description Part Number M/N 41LR4060...
Table 9.3 – C-Frame LiquiFlo Drive Replacement Parts Quantity M/N 50LW4060 M/N 64LW4060 Description Part Number M/N 50LR4060 M/N 64LR4060 450 HP Power Module Adapter (PMA) 179134 — Printed Circuit Board (PCB) 600 HP Power Module Adapter (PMA) 179067 — Printed Circuit Board (PCB) DC Bus Control PCB 179069...
PPENDIX Technical Specifications Table A.1 – Service Conditions AC Line Distribution System Capacity 85,000 amps symmetrical fault current capacity. Short circuit rating may be limited to 65,000 amps if a circuit breaker is (maximum) for 460 VAC Units used instead of fuses. Control Method All-digital vector, sinusoidal pulse-width-modulated (PWM) Displacement Power Factor...
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Table A.2 – Environmental Conditions Condition Specification Operating Temperature (inside an enclosure) (32°F to 131°F) 0°C to 55°C -40°C to 65°C (−40°F to 149°F) Storage Temperature (Ambient) Humidity 5% to 95% (non-condensing) User-supplied cabinet air cooling system must provide adequate heat dissipation to maintain an internal temperature not to exceed 55°C.
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Table A.5 – Terminal Strip RS-232 Specifications Signal Type Terminal(s) Specification RS-232 Communications XMIT RECV COMMON Table A.6 – Encoder Feedback Device Specifications (FVC Regulation Only) Specification Rating Motor Poles 2, 4, 6, or 8 poles Overcurrent IET 200% load (based on drive nameplate rating) Overload Current Rating 150% for 5 seconds...
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Table A.7 – Input Signal Response Times (Maximum) Signal Type and Source Volts/Hertz Regulation* Vector Regulation* Keypad START 150 milliseconds 130 milliseconds Terminal Strip: START 126 milliseconds 105 milliseconds STOP, RESET, FL 75 milliseconds 75 milliseconds Preset Speeds 75 milliseconds 75 milliseconds Analog Speed/Trim 16 milliseconds...
PPENDIX Cooling System Specifications M/N 50LW4060 M/N 50LR4060 M/N 41L4060 M/N 41LR4060 M/N 64LW4060 M/N 64LR4060 M/N 120L4060 Coolant Type Potable water Refrigerant Potable water Refrigerant Potable water with no with no with approved additives. additives. corrosion inhibitor Inlet Coolant C to 40 See note C to 40...
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NDEX Communication port (J8), 2-9, 2-13, 3-7, 7-1, 7-9 Communication, network, 2-1, 3-7 Component locations, 2-2 to 2-7 AC input Control and Configuration Software, 2-1, 2-17, diodes, checking, 9-5 to 9-6 3-8, 7-9 disconnect, installing, 5-2 to 5-4 Contacting Reliance, 1-1 isolation, transformer, 5-1 Contactors, installing output, 6-1 line branch circuit fuses, 3-8, 5-2 to 5-4...
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requirements, 3-1 to 3-9 transformers and reactors, 5-1 Emergency stop, 7-6 Enclosures, NEMA, 2-2, 3-1 Encoder specifications, A-3 Jog (digital input 4), 2-10 to 2-11, 7-3 to 7-5, 7-15 wiring, 2-12 to 2-13, 7-8 Jumpers Environmental conditions, 3-1 to 3-2, A-2 J4, 2-10 to 2-13 J17, 2-11 to 2-13 location of, 2-9...
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Network Remote (digital input 8), 2-12 to 2-11, 7-3 to 7-5, AutoMax Network Option board, 2-17 7-12 communication, 2-13, 3-7 Replacement parts, 9-5 Reset (digital input 3), 2-10 to 2-13, 7-3 to 7-5, 7-16 Resistor, bus discharge, 2-2 to 2-5 Reverse (digital input 6), 2-12 to 2-13, 7-3 to 7-5, 7-14 Open loop, see Volts/Hertz Regulation...
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Transients, AC line voltage, 5-1 Vector regulation, 2-1 Ventilation, see Air Flow Volts/hertz regulation, 2-1 Watts loss rating, 2-2, 4-1 Weight, 3-2 Index-4 LiquiFlo AC Power Modules, Hardware Reference Version 6.4...