Emerson Fisher L2e Instruction Manual
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Emerson Fisher L2e Instruction Manual

Emerson Fisher L2e Instruction Manual

Electric level
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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
Partner 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 sales office
or Local Business
May 2017

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Summary of Contents for Emerson Fisher L2e

  • Page 1: Table Of Contents

    ™ Contents Figure 1. Fisher L2e Electric Level Controller Introduction ....... . .

  • Page 2: Description

    Specifications for the controller and sensor are listed in table 1. Educational Services For information on available courses for L2e electric liquid level controllers, as well as a variety of other products, contact: Emerson Automation Solutions Educational Services - Registration Phone: 1-641-754-3771 or 1-800-338-8158 E-mail: education@emerson.com...
  • Page 3 ASME B16.34 up to sizing, actuator speed, rate, liquid out flow, and maximum pressure of 258.5 bar (3750 psig). vessel size. Contact your Emerson sales office or Local For PED (97/23/EC) maximum pressure limited to Business Partner for Fisher Electric Level Loop 200 bar (2900 psig).

  • Page 4: Installation

    Supplement (D103277X012), available at Fisher.com or from your Emerson sales office or Local Business Partner. 2. Maximum span setting with 1 7/8 x 12 inch horizontal displacer plus 6 inch extension is not recommended due to potentially insufficient zero adjustment.

  • Page 5: Attaching A Vertical Displacer

    Instruction Manual L2e Controller D103531X012 May 2017 1. Be sure there are no obstructions inside the vessel that will interfere with displacer installation or operation. 2. Provide the appropriate connection in the vessel wall to match the sensor connection. Locate the vessel wall connection such that the displacer will be at the desired control level.

  • Page 6: Electrical Connections

    Instruction Manual L2e Controller May 2017 D103531X012 Electrical Connections WARNING For explosion­proof applications, disconnect power before installing, servicing or removing electrical components. Personal injury or property damage from fire or explosion may result if power is not disconnected. Select junction boxes, wiring and/or cable glands that are rated for the environment of use (such as hazardous location, ingress protection, and temperature).
  • Page 7 Instruction Manual L2e Controller D103531X012 May 2017 Wiring Configurations There are two recommended wiring configurations depending on the preferred site solution and approach to electric level control; a direct connection to the easy-Drive actuator, shown in figure 3 or a direct connection to the easy-Drive actuator and a remote monitor (figure 4 and 5).
  • Page 8 Instruction Manual L2e Controller May 2017 D103531X012 Figure 4. Local Level Loop Control with Direct Connect to easy-Drive Actuator with ROC809 Remote Monitor REMOVE COVER TO ACCESS POWER AND CONTROL TERMINAL 12/24 VDC POWER SUPPLY X0661 GREEN (GND) BROWN OPEN BLUE CLOSE W9795-4...
  • Page 9 Instruction Manual L2e Controller D103531X012 May 2017 Figure 5. Local Level Loop Control with Direct Connect to easy-Drive Actuator with FloBoss 107 Remote Monitor REMOVE COVER TO ACCESS POWER AND CONTROL TERMINAL 12/24 VDC X0661 POWER SUPPLY GREEN (GND) BROWN OPEN BLUE CLOSE...

  • Page 10: L2E Initial Setup (Dry Displacer)

    Instruction Manual L2e Controller May 2017 D103531X012 L2e Initial Setup (Dry Displacer) Refer to figure 6. 1. Move Span to minimum setting. 2. Move Zero down until the valve opens, or N/C contact (red to brown leads) closes. 3. Slowly move Zero up until valve closes, or N/C contact (red to brown leads) opens. L2e Zero and Span Adjustment (Wet Displacer) After initial setup (dry displacer) is complete, 1.

  • Page 11: Principle Of Operation

    For a given change in displacer movement the span adjustment will increase or decrease a proportional change in the plunger movement. As fluid level rises, the plunger moves away from the switch and vice versa. Figure 7. Fisher L2e Controller CONTROLLER MOUNTING LEVER A...

  • Page 12: Maintenance

    Instruction Manual L2e Controller May 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. WARNING Always wear protective clothing, gloves, and eyewear when performing any maintenance operations to avoid personal injury.

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

    Instruction Manual L2e Controller D103531X012 May 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

    Use only genuine Fisher replacement parts. Components that are not supplied by Emerson Automation Solutions should not, under any circumstances, be used in any Fisher instrument. Use of components not supplied by Emerson Automation Solutions may void your warranty, might adversely affect the performance of the valve, and could cause personal injury or property damage.
  • Page 15 Description Description Note Keys 74, 75, 76, 77, and 78 are included in the Sensor Repair Kit. Note Contact your Emerson sales office or Local Business Partner for Part Ordering information. O‐Ring, fluorocarbon Anti‐extrusion ring, PTFE Retaining ring, 304 SST O‐Ring fluorocarbon...
  • Page 16 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. All other marks are the property of their respective owners.

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