Limitorque L120-85 Installation, Operation and Maintenance FCD LMENIM1202-03-A4 – 06/15
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1 Introduction
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1.1 Purpose
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1.2 User Safety
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2 Initial Inspection and Storage Instructions
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2.1 Inspection and Recording
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2.2 Short-Term Storage
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2.3 Product Identification
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2.4 Product Description
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2.5 Product Features
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3 Actuator Weight
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4 Installation Instructions
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4.1 Actuator Mounting
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4.1.1 Torque Only Applications (Drive 1)
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4.1.2 Torque and Thrust Applications (Drive 2)
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4.1.3 Mounting Bolts
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4.1.4 Stem Cover for Rising Stem Applications
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4.2 Verifying Motor Rotation Direction
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4.2.1 Initial Electrical Connections
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4.2.2 Motor rotation (phasing) and OPEN/CLOSE
pushbutton operation.
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4.2.3 Three-Phase Motor
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4.2.4 DC Motor
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4.3 Limit Switch Settings
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4.3.1 Basic Theory of Operation
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4.3.2 Adjustment—General
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4.3.3 Setting the OPEN Limit Switch
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4.3.4 Setting the CLOSE Limit Switch
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4.4 Torque Switch Setting and Wiring
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4.4.1 Basic Theory of Operation
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4.4.2 Setting the Torque Switch
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4.4.3 Balancing the Torque Switch
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4.4.4 Rewiring the Torque Switch
for Non-Standard Drive Sleeve Rotation
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4.5 Position Indication
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4.5.1 Local Position Indication
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4.5.2 Remote Position Indication
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4.5.3 Setting the Potentiometer
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5 Operation
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5.1 Description of Motor Operation
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5.2 Description of Manual Operation
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5.3 Electrical Start-up Procedure
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6 Maintenance
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6.1 Lubrication
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6.1.1 Initial Inspection
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6.1.2 Frequency
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6.1.3 Routine Inspection
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6.1.4 Factory Lubricants
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6.1.5 Minimum Lubricant Qualities Required
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7 Disassembly
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7.1 Removal From Valve
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7.2 Open Electrical Compartment and Disconnect Motor 30
7.3 Remove Control Wiring
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7.4 Remove Limit and Torque Switch
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7.5 Remove Motor Assembly
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7.6 Remove Handwheel
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7.7 Remove Handwheel Shaft Assembly
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7.8 Remove Declutch Lever Assembly
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7.9 Remove Clutch Assembly
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7.10 Remove Clutch Pinion Assembly
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7.11 Remove Worm Shaft Assembly
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7.12 Remove and Disassemble Thrust Base
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7.13 Remove Drive Sleeve
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8 Assembly
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8.1 Handwheel Shaft Assembly and Shimming
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8.2 Verifying Handwheel Operation
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8.3 Thrust Base Assembly and Shimming
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9 Troubleshooting
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9.1 Typical Wiring Diagram
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Three-phase with Control Package
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10 How to Order Parts
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10.1 L120-85 Illustrated Parts Breakdown
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10.2 L120-85 Parts List
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11 Regulatory Information
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Contents