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Fisher L2e Instruction Manual

Electric level controller
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Instruction Manual
D103531X012
Fisher
L2e Electric Level Controller
™
Contents
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Introduction

Scope of Manual

This instruction manual includes installation, adjustment, maintenance, and parts ordering information for the Fisher
L2e electric liquid level controller.
Do not install, operate or maintain an L2e electric liquid level controller without being fully trained and qualified in
valve, actuator, and accessory installation, operation, and maintenance. To avoid personal injury or property damage,
it is important to carefully read, understand and follow all the contents of this manual, including all safety cautions
and warnings. If you have any questions about these instructions, contact your
office
before proceeding.
www.Fisher.com
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Figure 1. Fisher L2e Electric Level Controller
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X0660
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L2e Controller
Emerson Automation Solutions sales
March 2017

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Summary of Contents for Fisher L2e

  • Page 1: Table Of Contents

    This instruction manual includes installation, adjustment, maintenance, and parts ordering information for the Fisher L2e electric liquid level controller. Do not install, operate or maintain an L2e electric liquid level controller without being fully trained and qualified in valve, actuator, and accessory installation, operation, and maintenance. To avoid personal injury or property damage, it is important to carefully read, understand and follow all the contents of this manual, including all safety cautions and warnings.

  • Page 2: Description

    The L2e controls the lower trip point (zero) that closes the dump valve, allowing the vessel to fill to the upper trip point. Once the upper trip point is reached, the dump valve opens to drain the fluid down to the zero or lower trip point.
  • Page 3 Contact your Emerson Automation For PED (97/23/EC) maximum pressure limited to Solutions sales office for Fisher Electric Level Loop 200 bar (2900 psig). performance optimization. S31603 SST Displacer: CL600 pressure temperature ratings per ASME B16.34 up to maximum pressure of Specific Gravity Limits 99.3 bar (1440 psig)

  • Page 4: Installation

    CAUTION If the L2e electric level controller is installed on a vessel that is to be shipped to a different location (e.g. skid mounted units), remove the displacer and displacer rod extensions before shipment. Failure to do so could result in damage to the instrument and or the displacer rod due to vibration and impact loading during shipment.

  • Page 5: Attaching A Vertical Displacer

    Attaching the Sensor to the Vessel Insert the displacer end of the L2e sensor into the vessel connection and tighten enough to seal the threads. If necessary, loosen or tighten slightly to obtain the horizontal orientation shown in figure 2. Make sure that the controller case is level.

  • Page 6: Electrical Connections

    The action of the controller is such that rising level will cause the Normally Closed (N/C) contacts to close and the Normally Open (N/O) contacts to open. Falling level causes the opposite action. Connect L2e electrical wires as shown in table 2. To reverse the action refer to table 2 and reverse wiring for normally open and normally closed.
  • Page 7 3 or a direct connection to the easy-Drive actuator and a remote monitor (figure 4 and 5). In these examples, the L2e is wired using a common and separate N/O or N/C contact.
  • Page 8 BLUE CLOSE W9795-4 easy-Drive ACTUATOR WITH easy-Drive ACTUATOR FISHER D3 CONTROL VALVE POWER AND CONTROL TERMINAL ROC809 DI MODULE DISCRETE INPUT CONFIGURED FOR DRY CONTACT CLOSURE EXTERNALLY POWERED CONNECT GREEN WIRE TO ACTUATOR GROUND (NOT SHOWN) OPEN CONTACT (2) MAY BE LABELED N.O. AND CLOSE CONTACT (3) MAY BE LABLED N.C.
  • Page 9 OPEN BLUE CLOSE W9795-4 easy-Drive ACTUATOR WITH easy-Drive ACTUATOR FISHER D3 CONTROL VALVE POWER AND CONTROL TERMINAL FloBoss 107 AI/DI MODULE OR FloBoss 107 DIs ON CPU MODULE'S OPTIONAL I/O ASSEMBLY DISCRETE INPUT CONFIGURED FOR DRY CONTACT CLOSURE EXTERNALLY POWERED CONNECT GREEN WIRE TO ACTUATOR GROUND (NOT SHOWN) OPEN CONTACT (2) MAY BE LABELED N.O.

  • Page 10: L2E Initial Setup (Dry Displacer)

    3. Tighten the Zero Adjustment hex nut (key 5), shown in figure 7, to lock the Zero setting. Note Scan the QR code shown in figure 6 or on the inside cover of the L2e for electric level loop field support. Figure 6. Initial Setup...

  • Page 11: Principle Of Operation

    Principle of Operation The operation of the L2e is based on Archimedes Principle, which states that a body immersed in a liquid will be buoyed up by a force equal to the weight displaced. The buoyant force and resultant movement of the displacer in the liquid is transmitted to the controller.

  • Page 12: Maintenance

    Instruction Manual L2e Controller March 2017 D103531X012 Maintenance Parts are subject to normal wear and must be inspected periodically and replaced as necessary. The frequency of parts inspection and replacement depends upon the severity of service conditions. When inspection or repairs are required, disassemble only those parts necessary to accomplish the task.

  • Page 13: Replacing The Complete Controller Assembly (Rl2E0X00C12)

    Instruction Manual L2e Controller D103531X012 March 2017 Assembly WARNING Improper assembly of the O­rings, anti-extrusion ring, and backup ring could result in O­ring extrusion and permit leakage of process fluids. To avoid personal injury or property damage from leaking process fluid, be sure the O­rings, anti­extrusion ring and backup ring are assembled in the order shown in figure 9.

  • Page 14: Related Documents

    D Changing easy-Drive Electric Actuator On/Off Input Configuration from Single Dry Contact Control to Dual Dry Contact Control—Supplement to L2e Electric Level Controller Instruction Manual (D103987X012) D Converting a Threaded NPT Connection to a Flange Connection—Supplement to Fisher L2, L2e, and L2sj Liquid Level Controller Instruction Manuals (D103277X012) D Dimensions for NPS 2 CL150 through 1500 Slip On Flange Connections—Supplement to Fisher L2, L2e, and L2sj...
  • Page 15 Instruction Manual L2e Controller D103531X012 March 2017 Figure 8. Fisher L2e Electric Level Controller Assembly GG10047-E Parts List Description Description Note Keys 74, 75, 76, 77, and 78 are included in the Sensor Repair Kit. Note Contact your Emerson Automation Solutions sales office for Part Ordering information.
  • Page 16 Responsibility for proper selection, use, and maintenance of any product remains solely with the purchaser and end user. Fisher and easy-Drive are marks owned by one of the companies in the Emerson Automation Solutions business unit of Emerson Electric Co. Emerson Automation Solutions, Emerson, and the Emerson logo are trademarks and service marks of Emerson Electric Co.

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