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Summary of Contents for Woodward LQ6
- Page 1 Product Manual 26207 (Revision L, 5/2017) Original Instructions LQ6 Liquid Fuel Metering System Fuel Valve with On-board Electronic Controller Analog and Digital Version Installation and Operation Manual...
- Page 2 Revisions— A bold, black line alongside the text identifies changes in this publication since the last revision. Woodward reserves the right to update any portion of this publication at any time. Information provided by Woodward is believed to be correct and reliable. However, no responsibility is assumed by Woodward unless otherwise expressly undertaken.
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Page 3: Table Of Contents
..........................29 ECLARATIONS Illustrations and Tables Figure 1-1. LQ6 Valve Outline Drawing ......................7 Figure 2-1. LQ6 Terminal Block Wiring Diagram ..................10 Figure 2-2. LQ6 Plant Wiring Diagram ......................10 Figure 2-3. Service Port ..........................13 ... -
Page 4: Warnings And Notices
Manual 26207 LQ6 Liquid Fuel Metering System Warnings and Notices Important Definitions This is the safety alert symbol used to alert you to potential personal injury hazards. Obey all safety messages that follow this symbol to avoid possible injury or death. -
Page 5: Electrostatic Discharge Awareness
Do not touch the components or conductors on a printed circuit board with your hands or with conductive devices. To prevent damage to electronic components caused by improper handling, read and observe the precautions in Woodward manual 82715 , Guide for Handling and Protection of Electronic Controls, Printed Circuit Boards, and Modules. -
Page 6: Regulatory Compliance
United States Certificate 1214202 The LQ6 valve wiring must be in accordance with North American Class I, Division 1 or 2 or European Zone 1 or 2 wiring methods and in accordance with the authority having jurisdiction. Special Conditions for Safe Use: Field wiring for the LQ6 valve power input must be suitable for at least 103 °C. - Page 7 Manual 26207 LQ6 Liquid Fuel Metering System EXPLOSION HAZARD—Do not remove covers or connect/disconnect electrical connectors unless power has been switched off or the area is known to be non-hazardous. Substitution of components may impair suitability for Class I, Division 2 or Zone 2.
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Page 8: Chapter 1. General Information
General Information Introduction The LQ6 valve is an electrically actuated fuel valve with an on-board, electronic position controller. The valve is designed to accept a demand signal, and then accurately position the fuel metering element, exposing the port effective area proportional to flow. The metering element is designed to promote self- cleaning by a shear-type action created by the rotary plate and shoe. -
Page 9: Figure 1-1. Lq6 Valve Outline Drawing
Manual 26207 LQ6 Liquid Fuel Metering System Figure 1-1. LQ6 Valve Outline Drawing Woodward... -
Page 10: Chapter 2. Installation
Be careful when unpacking the LQ6 valve. Check the assembly for signs of damage, such as bent or dented covers, scratches, and loose or broken parts. Notify the shipper and Woodward if damage is found. -
Page 11: Electrical Connections
69 kPa (10 psig). The LQ6 should be mounted onto a flat plate with 0.250-28 size bolts. The piping connections (IN, OUT and BYP) are 1.312-12 UN STR THD Port (-16). Consideration must be given to the strength of the mounting plate in order to support the 23.2 kg (51.2 lb) mass of the LQ6. -
Page 12: Figure 2-1. Lq6 Terminal Block Wiring Diagram
In + down Out - Out + Shield Shield Shield Shading indicates terminal not used on analog version of LQ6 Figure 2-1. LQ6 Terminal Block Wiring Diagram Power Supply Fuse 10A at Common Point 18-32 Vdc POWER 18-32 Vdc POWER... -
Page 13: Supply Voltage
Terminal 13 and/or 14 = Supply voltage (–) The supply voltage during normal operation must be 18 to 32 V, measured at the LQ6 valve connectors. Input current is typically less than 2.0 A, but momentary current peaks can reach 7 A. The recommended power supply cable size is 3.0 mm²... -
Page 14: Devicenet Interface
Terminal 6 = Shield The (4 to 20) mA Input is the analog position command input for the LQ6 valve. Input scaling is such that 4 mA input current corresponds to 0 % valve position and 20 mA input current corresponds to 100 % valve position. -
Page 15: Status Output
Terminal 23 = Status Output (–) The Status Output indicates if the LQ6 is shutdown or running. There are two ways for the LQ6 to be shut down—if the Shutdown/Reset input is in shutdown, or if a diagnostic has been triggered. If the LQ6 is in a shutdown situation, the status output is open (no current). -
Page 16: Figure 2-4. Service Port Close-Up
Manual 26207 LQ6 Liquid Fuel Metering System Figure 2-4. Service Port Close-Up Woodward... -
Page 17: Chapter 3. Description Of Operation
LQ6 Liquid Fuel Metering System Chapter 3. Description of Operation Description Due to typical noise levels in engine environments, hearing protection should be worn when working on or around the LQ6 valve. The valve can be in four operational modes. Running ... -
Page 18: Position Control
LQ6 Liquid Fuel Metering System Position Control: The following table shows the operating states for the LQ6 Digital Version. Configuration for Backup Used and Analog Primary are done over the DeviceNet Interface. See Chapter 5 for a description of Shutdown Input, Tracking Error, DeviceNet Error, and Analog Error. -
Page 19: Chapter 4. Valve Sizing
SG = Specific Gravity relative to water (0.82 typical for diesel fuel) Once the maximum required geometric area is calculated, choose the LQ6 metering port size by picking the closest one of the three sizes available that is greater. Below are graphs of the available metering port sizes for specific gravities of 0.82 and 0.975. -
Page 20: Figure 4-2. Metering Port Size - 0.975 Specific Gravity
Manual 26207 LQ6 Liquid Fuel Metering System LQ6 Port Alternatives - 0.975 Specific Gravity Input Demand (%) 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 12000 11500 11000... -
Page 21: Chapter 5. Troubleshooting
Manual 26207 LQ6 Liquid Fuel Metering System Chapter 5. Troubleshooting Possible Reason Explanation Action Power up Reset After power up, the valve will go into Reset the valve after power (Shutdown) shutdown until the valve is reset by the shutdown reset input. -
Page 22: Chapter 6. Maintenance
Do not lift or handle the valve by any conduit. Due to typical noise levels in engine environments, hearing protection should be worn when working on or around the LQ6 valve. The surface of this product can become hot enough or cold enough to be a hazard. -
Page 23: Chapter 7. Software Upgrade
Manual 26207 LQ6 Liquid Fuel Metering System Chapter 7. Software Upgrade The software can be updated by loading a new program through the service port. EXPLOSION HAZARD—Do not remove covers or connect/disconnect electrical connectors unless power has been switched off or the area is known to be non-hazardous. -
Page 24: Figure 7-1. Jumper Locations
Manual 26207 LQ6 Liquid Fuel Metering System Figure 7-1. Jumper Locations (location drawing–top; close-up–bottom) (See Figure 2-3 for a photo of the jumpers.) Woodward... -
Page 25: Chapter 8. Product Support And Service Options
An Authorized Independent Service Facility (AISF) provides authorized service that includes repairs, repair parts, and warranty service on Woodward's behalf. Service (not new unit sales) is an AISF's primary mission. A Recognized Turbine Retrofitter (RTR) is an independent company that does both steam and gas turbine control retrofits and upgrades globally, and can provide the full line of Woodward systems and components for the retrofits and overhauls, long term service contracts, emergency repairs, etc. -
Page 26: Returning Equipment For Repair
All repair work carries the standard Woodward service warranty (Woodward Product and Service Warranty 5-01-1205) on replaced parts and labor. -
Page 27: Replacement Parts
The unit serial number, which is also on the nameplate Engineering Services Woodward offers various Engineering Services for our products. For these services, you can contact us by telephone, by email, or through the Woodward website. Technical Support ... -
Page 28: Technical Assistance
LQ6 Liquid Fuel Metering System Technical Assistance If you need to contact technical assistance, you will need to provide the following information. Please write it down here before contacting the Engine OEM, the Packager, a Woodward Business Partner, or the Woodward factory: General... -
Page 29: Lq6 Valve Specifications
Ultra low sulfur diesels are also acceptable with proper lubricity additives. Other fuels such as ethanol or methanol may be acceptable with internal seal compound substitutions. Contact Woodward for these and other special fuel applications. Fuel Viscosity Fuel viscosity must be between 0.5 and 12.0 centistokes. -
Page 30: Revision History
Manual 26207 LQ6 Liquid Fuel Metering System Revision History Changes in Revision L— Updated Compliance Directives Updated Declarations Changes in Revision K— Expanded information on use of electrolytic capacitor (page 11) Changes in Revision J— Updated Regulatory Compliance information ... -
Page 31: Declarations
Manual 26207 LQ6 Liquid Fuel Metering System Declarations Woodward... - Page 32 Manual 26207 LQ6 Liquid Fuel Metering System Woodward...
- Page 33 Email and Website—www.woodward.com Woodward has company-owned plants, subsidiaries, and branches, as well as authorized distributors and other authorized service and sales facilities throughout the world. Complete address / phone / fax / email information for all locations is available on our website.
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