Instruction Manual

ManualsBrandsEmerson ManualsValve InstrumentationEmerson Fisher L2 and L2sj

www.Fisher.com

Fisherr L2sj Low Emission Liquid Level Controller

Contents

Introduction 1.................................

Scope of Manual 1.............................

Description 3.................................

Specifications 3...............................

Educational Services 3.........................

Principle of Operation 4.........................

Installation 5..................................

Attaching Vertical Displacer 6...................

Mounting the Controller to the Vessel 6...........

Attaching Horizontal Displacer 6.................

Supply Pressure Connections 6..................

Vent 7.......................................

Set‐up and Adjustments 7.......................

Dry Displacer Setup 7..........................

Wet Displacer Adjustments 9...................

Maintenance 9.................................

Removing the Controller From the Sensor 10........

Replacing the Sensor O‐Rings 10.................

Disassembly 10............................

Assembly 10..............................

Replacing the Controller Relay 12................

Replacing the Controller Supply Filter 12..........

Parts Ordering 12...............................

Figure 1. Fisher L2sj Liquid Level Controller

W9331

Parts Kits 13...................................

Parts List 13...................................

Controller 13.................................

Sensor 14....................................

Introduction

Scope of Manual

This instruction manual includes installation, adjustment, maintenance, and parts ordering information for the Fisher

L2sj low emission liquid level controller.

Do not install, operate or maintain a L2sj low emission 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 contents of this instruction manual, including all safety

cautions and warnings. If you have any questions about these instructions, contact your Emerson Process

Management sales office before proceeding.

Instruction Manual

D103216X012

L2sj Controller

January 2015

Summary of content (16 pages)

PAGE 1
Instruction Manual L2sj Controller D103216X012 January 2015 Fisherr L2sj Low Emission Liquid Level Controller Contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Scope of Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Educational Services . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 2
Instruction Manual L2sj Controller D103216X012 January 2015 Table 1. Specifications Displacer Size Available Configuration Controller: On‐Off / Direct Acting Sensor: Displacer‐type liquid level sensor for mounting to side of vessel. J 48 x 305 mm, 541 cm3 (1‐7/8 x 12 inches, 33 in3)(4) or J 76 x 152 mm, 688 cm3 (3 x 6 inches, 42 in3)(5) Input Signal Liquid Level (gas over liquid) Maximum Sensor Working Pressure(6) PVC Displacer: Consistent with CL1500 pressure temperature ratings per ASME B16.
PAGE 3
Instruction Manual L2sj Controller D103216X012 January 2015 Table 1. Specifications (continued) Canadian Registration The L2sj utilizes the same sensor unit pressure component as the L2 pneumatic controller version. Refer to the L2 CRN which is deemed applicable to the L2sj. product to be in compliance with Article 3 paragraph 3 of the Pressure Equipment Directive (PED) 97 / 23 / EC.
PAGE 4
Instruction Manual L2sj Controller D103216X012 January 2015 Principle of Operation The operation of the L2sj controller in combination with the sensor is based on the Archimedes Principle, which states that a body immersed in a liquid will be buoyed up by a force equal to the weight of the liquid displaced. The buoyant force and resultant movement of the displacer in the liquid is transmitted to the controller which delivers a pneumatic signal to a control valve.
PAGE 5
Instruction Manual D103216X012 L2sj Controller January 2015 Installation WARNING D Wear protective clothing, gloves, and eyewear whenever possible when performing any installation operations to avoid personal injury or property damage. D To avoid personal injury or property damage caused by the sudden release of process fluid, be certain the service conditions do not exceed the sensor pressure limits.
PAGE 6
L2sj Controller Instruction Manual D103216X012 January 2015 Mounting the Controller to the Vessel Insert the displacer end of the controller‐sensor assembly into the vessel connection, and screw the sensor threads into the vessel connection. Tighten sufficiently to seal the threads. If necessary, loosen or tighten slightly to obtain the orientation shown in figure 3. Make sure that the controller case is level. Figure 3.
PAGE 7
Instruction Manual L2sj Controller D103216X012 January 2015 in diameter will suffice in most applications, check with an Emerson Process Management field office and industry instrument air quality standards for use with corrosive air or if you are unsure about the proper amount or method of air filtration or filter maintenance. Provide a source of clean, dry air that meets the requirements of ISA Standard 7.0.01 or noncorrosive gas as the operating medium. Refer to table 1 to determine supply pressure.
PAGE 8
Instruction Manual L2sj Controller D103216X012 January 2015 Figure 4. Setup and Adjustments Label (Inside Fisher L2sj Cover) GE16844 1. Set the supply pressure to 25 psig. Note Supply pressure can be set between 0.34 and 2.4 bar (5 and 35 psig). 2. Set the span adjuster to the maximum sensitivity. 3. Turn the spring adjustor to tighten the spring to it's maximum extension. If the output pressure rises, loosen the spring until the output pressure exhausts to 0 psig.
PAGE 9
Instruction Manual D103216X012 L2sj Controller January 2015 4. Check the setup, as follows: a. Press down firmly on the displacer rod end and observe the amount of time it takes for the output pressure to reach supply pressure. b. Slowly release the displacer and observe the amount of time it takes for the output pressure to exhaust to 0 psig. c. The time observed in step a should equal the time observed in step b.
PAGE 10
L2sj Controller Instruction Manual January 2015 D103216X012 D Completely shut off the process to isolate the controller/sensor from process pressure. D Provide a means of containing the process fluid before removing any measurement devices from the process. D Vent any trapped process pressure. D Check with your process or safety engineer for any additional measures that must be taken to protect against process media. Removing the Controller From the Sensor 1.
PAGE 11
Instruction Manual L2sj Controller D103216X012 January 2015 B Figure 5.
PAGE 12
L2sj Controller Instruction Manual January 2015 D103216X012 4. Insert the displacer rod (key 64) into the vessel side of the sensor connection (key 65). 5. The pivot base must seat in the slots cast in the sensor connection. These slots will be horizontal when the sensor connection (key 65) is oriented as shown in figure 3. 6.
PAGE 13
Instruction Manual L2sj Controller D103216X012 January 2015 Parts Kits Description Controller Repair Kit Kit includes O‐rings (keys 13 and 16) and gaskets (keys 18, 21, and 23) Relay Repair Kit Kit includes relay assembly, relay mounting screws (key 33), and O‐rings (key 43, and 44) On/Off Control Part Number Note For part numbers not shown, contact your Emerson Process Management sales office.
PAGE 14
Instruction Manual L2sj Controller D103216X012 January 2015 Figure 6.
PAGE 15
Instruction Manual D103216X012 L2sj Controller January 2015 15
PAGE 16
L2sj Controller January 2015 Instruction Manual D103216X012 Neither Emerson, Emerson Process Management, nor any of their affiliated entities assumes responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use, and maintenance of any product remains solely with the purchaser and end user. Fisher is a mark owned by one of the companies in the Emerson Process Management business unit of Emerson Electric Co.