Emerson Shafer ECAT User manual

Installation, Operation and Maintenance Manual
VA-DC-000-1952 Rev. 0
April 2021
Shafer ECAT
Emission Controlled Actuator Technologies

Installation, Operation and Maintenance Manual
VA-DC-000-1952 Rev. 0
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Notes
April 2021

Installation, Operation and Maintenance Manual
VA-DC-000-1952 Rev. 0
Table of Contents
April 2021
iTable of Contents
Table of Contents
Section 1: Introduction
1.1 Scope............................................................................................................ 1
1.2 General Information...................................................................................... 1
1.3 Safety Information ........................................................................................ 3
1.4 Abbreviation Denitions ............................................................................... 4
Section 2: Installation
2.1 Preparation ................................................................................................... 5
2.2 Valve Preparation .......................................................................................... 6
2.3 Actuator Preparation..................................................................................... 6
2.4 Lifting the ECAT System ................................................................................ 7
2.5 Installing the ECAT Actuator on the Valve...................................................... 9
2.6 Setting the Stroke Limit Stops ....................................................................... 9
2.7 Hydraulic Fluid ............................................................................................ 10
2.8 Accumulator ............................................................................................... 10
Section 3: Electrical Connections
3.1 Main Electrical Connections ........................................................................ 13
3.2 Sealing Cable / Conduit Entries.................................................................... 13
Section 4: Set-up / Start-up Procedure
4.1 Preparation ................................................................................................. 14
4.2 Initial Check of the Unit ............................................................................... 15
4.3 Initial Connections ...................................................................................... 15
4.4 Initial Pre-Charge ........................................................................................ 15
4.5 Initial Reservoir Fill ...................................................................................... 15
4.6 Hydrostatic Pressure / Function Test............................................................ 15
4.7 Final Start-Up Procedure ............................................................................. 17
4.8 Optional Instrumentation ........................................................................... 17
Section 5: Troubleshooting
Troubleshooting ................................................................................................... 18
Section 6: Maintenance
6.1 Storage Procedures..................................................................................... 19
6.2 Service Interval ........................................................................................... 19
6.3 Lubrication Requirements ........................................................................... 19
6.4 Recommended Annual Inspection............................................................... 20

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Installation, Operation and Maintenance Manual
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Section 1: Introduction
Introduction
Section 1: Introduction
1.1 Scope
This manual is offered as a guide to be used along with locally approved and safe practices to install,
operate, service and maintain the ECAT system. Carefully follow the instructions in this manual and
make sure you install the system correctly and according to your requirements.
1.2 General Information
1.2.1 Overview
The ECAT is a self-contained, quarter-turn, valve actuator that combines proven technologies from
Emerson’s Valve Automation. The actuator has been designed for critical shutdown applications
where reliability is crucial.
The ECAT utilizes a hydraulic accumulator, pressurized with the pipeline gas, as a stored energy
source in order to actuate the actuator / valve open or closed. The self-contained system contains
an electric motor, gear pump, and reservoir. Pressure switches for alarming and return line hydraulic
ltration is available as an option.
1.2.2 Operation
After initial start-up and commissioning procedures have been accomplished, the electric driven
hydraulic pump will keep the power header and all accumulators pressurized to the appropriate
pressure with no intervention from operations personnel.
1.2.3 Maintaining Pressure
Any loss of pressure in the power header line or accumulators, whether caused by external leakage
or actuator movement, will cause the thermal-volume controller rod to move down. This movement
operates the motor control switch to the “Motor On” position, automatically starting the electric
driven hydraulic pump. The pump will run until the hydraulic uid in the power header line and all
accumulators has been replenished. When the header and accumulator have been lled, the thermal-
volume controller rod will rise and operate the motor control switch to the “Motor Off” position.
There is no need for the pump to be started or stopped by operations personnel.
1.2.4 Mechanically Operated Components
The only mechanically operated components on the ECAT system are the motor control switch
located on the thermal volume controller. This switch detects the position of the thermal-volume
controller and relays the information back to the control. The control then starts or stops a motor as
needed. The switch does not require adjustment or maintenance.
1.2.5 Relieving Pressure on the Fluid
High-pressure hydraulic uid can be safely routed back to the reservoir from the accumulator or
actuator units by opening the main accumulator Bypass valve located on the reservoir. Opening this
valve will allow the pressurized uid in the system to be common to the reservoir. This valve should
be opened slowly to prevent the high-pressure uid from foaming due to the velocity through the
hand valve. A hydraulic thermal relief valve is piped in parallel to this hand valve for the purpose
of relieving excess hydraulic pressure in case the control malfunctions or ambient temperature
conditions exceed design limits.

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Section 1: Introduction
Introduction
1.2.6 Fluid Level in Reservoir
The reservoir tank is provided with a stainless steel sight glass level viewer.
1.2.7 Functional Description
The following is a functional description of the ECAT System for valve actuators and a brief
explanation of the main components that make this ECAT system unique. Throughout this
explanation numbers which appear in parenthesis ( ) correspond to item numbers on Schematic
Diagram 11547-S.
The ECAT system provides energy for operation of valve actuators during normal operation as well as
emergency shutdown. This energy is hydraulic power stored in the Accumulator (76). When required,
the Accumulator (76) pushes the hydraulic uid into the power oil header line. The power oil header
line supplies the actuator power for operation.
The hydraulic uid leaving the valve actuator will pass through the return oil header line back into the
Oil Reservoir (60) creating a closed loop system.
The Accumulator (76) gets its power from high-pressure pipeline gas pushing on the accumulator’s piston.
The hydraulic uid, stored in the Accumulator (76), originates from the Oil Reservoir (60). Fluid
is drawn from the Oil Reservoir (60) and through the suction line by a Hydraulic Pump (67). The
hydraulic pump (67) forces the uid through the discharge line and into the Accumulator (76).
The ECAT system has one electric motor driven Hydraulic Pump (67). The pump is controlled by a
motor control switch operated by the Thermal-Volume Controller (77). While in operation, if the
Thermal-Volume Controller (77) moves a small amount actuating the Motor Start / Stop Switch (78)
to the “On” position, the electric motor driven Hydraulic Pump (67) will start to run. The pump will
operate until the Thermal-Volume Controller moves and actuates the Motor Start / Stop Switch (78)
to the “Off” position.
1.2.8 Product Attributes
• Easy installation – ECAT actuator is a totally self-contained system and designed for
compactness and adaptable to new or existing valves
• Designed for Bettis™ or Shafer hydraulic double-acting actuator and controls, including
the handpump
• Shafer™ hydraulic control technology
• Multiple input power options with either AC or DC
• Local open / close control
• Fast speed of operation to fail-safe position if required
• Accumulator suitable for hydraulic and natural gas service
• Operating pressures up to 2220 psi with standard components

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Section 1: Introduction
Introduction
1.3 Safety Information
Safety notices in this manual detail precautions the user must take to reduce the risk of personal
injury and damage to the equipment. The user must read these instructions in their entirety. Failure
to observe these safety notices could result in serious bodily injury, damage to the equipment, void
of the warranty. Take special notice of all tags, warning labels and instructions presented on the
actuator. These may provide more specic and signicant information regarding the actuator than
this general manual.
It is the responsibility of the user to ensure proper safety practices are utilized. Always take
necessary precautions and use proper protective equipment when dealing with compressed gasses,
compressed hydraulic uid, pinch points and electricity.
Safety notices are presented in this manual in three forms (Warning, Caution and Note) as follows:
! WARNING
Alerts user of potential danger; failure to follow the warning notice could result in serious personal
injury or death.
! CAUTION
Identies precautions the user must take to avoid personal injury or equipment damage.
NOTE:
Highlights information critical to the user’s understanding of the ECAT system installation or operation.

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Section 1: Introduction
Introduction
1.4 Abbreviation Denitions
Abbreviations used in this manual and their denitions are listed in the table below:
Table 1. Abbreviation Denitions
Abbreviation Denition
IOM Installation Operation Manual
ESD Emergency Shutdown
FS Fail-safe
DA Double-Acting
MAWP Maximum Allowable Working Pressure
MOP Maximum Operating Pressure
MCC Motor Control Center
LS Limit Switch
PS Pressure Switch
NC Normally Closed
NO Normally Open
CCW Counterclockwise
CW Clockwise
OL Overload
PPE Personal Protective Equipment
GA General Arrangement Drawing
SOV Solenoid Valve
NO Normally Open
NC Normally Closed

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Section 2: Installation
Installation
Section 2: Installation
2.1 Preparation
2.1.1 Delayed Usage
If for any reason the actuator is not to be installed immediately, Emerson Process Management
recommends the following procedures. Failure to comply, with recommended procedures, could
lead to actuator malfunction and possibly void the warranty. For storage procedures exceeding one
year, consult Emerson Process Management for further recommendations.
As shipped from the factory, the ECAT system is an inherently weatherproof unit, providing that all
compartment covers and cable entry plugs remain intact. The actuator should be immediately stored
in a clean, dry warehouse, free from vibration and rapid temperature changes, until it can be installed
and energized.
If the actuator must be stored outside, store it off the ground at an elevation sufcient to prevent it
from being immersed in water or buried in snow. Check for any unpainted or exposed metal surfaces
and make sure they are protected with a coating of grease to prevent any corrosion. Cover the system
to prevent damage from site debris.
2.1.2 Tools and Materials Required
To complete these procedures, you will need the following documentation for the ECAT Actuator and
items indicated in the table below:
• General Arrangement Drawing
• Bill of Material
• ECAT System Schematic
• System Wiring Diagram
Table 2. Tools and Material Requirements
Tools and Material Requirements
Primary Power Source for the ECAT
(check the ECAT System Electrical Diagram for requirements)
Supplemental quantity of hydraulic uid, if needed
(See Section 2.7, Hydraulic Fluid and ECAT specication, for required uid type)
Hand Tools: complete complement of open end (SAE and metric) wrenches, screw drivers Philips
and at blade and a set of hex wrenches
Chains and lifting straps that are inspected and certied for the weight of the ECAT system
(check shipping weights)
Sealant for all cable and conduit entries (approvable by the National Electric Code or your country
standard and applicable local codes)

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Section 2: Installation
Installation
2.2 Valve Preparation
2.2.1 Remove Valve Gearing if equipped.
2.2.2 If valve is equipped with stops, remove valve stem extension housing. Examine the valve
stops to ensure no foreign material is present that would restrict normal travel of the valve.
Some valves are equipped with inspection ports in the valve housing for ease in examining
the stops.
2.2.3 Check alignment of stem key slot to the position of the valve. Normally with the valve in the
open position, the key slot is in line with the run of the pipeline. With the valve in the closed
position, the key slot should be 90° to the run of the valve.
2.2.4 The ECAT Actuator may be mounted to the valve at any time regardless of whether the valve
is under pressure.
2.3 Actuator Preparation
2.3.1 Once the ECAT Actuator is uncrated and cleaned for installation, check to ensure there will
be no interference with piping or other structure when the actuator is properly mounted to
the valve.
2.3.2 Check that all mounting materials such as fasteners, adapters, brackets etc. are on hand and
ready for use.
2.3.3 Check the actuator and valve to see that they are in the same relative position, that is either
open or closed. If the actuator must be moved, use the Handpump provided.
2.3.4 It is critical that the accumulator is charged with natural gas pipeline pressure prior to
operating the equipment. Refer to Section 2.8 for charging instructions.
NOTE:
Failure to charge the accumulator may cause the accumulator to not function properly.

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Section 2: Installation
Installation
2.4 Lifting the ECAT System
NOTE:
All ECAT Considerations
When handling any ECAT actuator, be aware of tubing, accessories, handpump, accumulators, and
control enclosures. Straps and chains can become entangled and cause damage to these components.
NOTE:
Do not use hydraulic tubing and electrical cable for lifting.
! CAUTION
Be sure to use appropriately rated crane / hoist and straps / chains to raise and lower the actuator.
2.4.1 Shafer Rotary Vane Actuator Lifting
Use the integrated lifting eyes only to lift and move the ECAT system.
Figure 1 ECAT System Mounted on the Shafer Rotary Vane Actuator
Lift at these lift points only

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Section 2: Installation
Installation
Figure 2 ECAT System Mounted on the Shafer Rotary Vane Actuator
! CAUTION
Never lift the actuator with a valve attached. Always handle actuator / valve assemblies by attaching
lifting equipment to the valve only.

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Section 2: Installation
Installation
2.5 Installing the ECAT Actuator on the Valve
The actuator will be bolt-mounted directly to a bracket or adaptor that will be bolted securely to the
mounting ange top works of the valve.
2.5.1 Check to see that the dimensions of the bracket or adaptor are suitable for use with the
valve mounting ange and stem.
2.5.2 Check valve direction of rotation and the actuator direction of rotation to see they match
(for example: CW = close, CCW = open).
2.5.3 Check to see the actuator and valve are in the same relative position (see 2.3.3).
2.5.4 Check all mounting surfaces, they must be clean and free of debris to permit proper t up.
2.5.5 Prior to mounting, grease the coupling bore and the bore of the actuator.
NOTE:
Do not apply grease to the mounting ange surfaces on the valve or the adaptor.
2.5.6 Install the stem key and grease it (keys may be held in place with tape).
2.5.7 Install the coupling onto the stem and stem key.
2.5.8 Install the coupling key and grease it.
2.5.9 Carefully align the coupling and key to the bore and keyway in the actuator and slide the
actuator onto the coupling until the adapter (bracket) bottoms out on the valve bonnet.
2.5.10 Use the required fasteners to rmly attach the adapter to the valve bonnet. Tighten the
fasteners to their manufacturer’s recommended maximum torque (dry or lubricated).
2.6 Setting the Stroke Limit Stops
Refer to the installed actuator installation and operation manual for specic instructions on setting
the actuator stops.

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Section 2: Installation
Installation
2.7 Hydraulic Fluid
The ECAT actuators are shipped with the reservoir lled to operation level. Before commissioning
and periodically afterwards, check to ensure the uid level is correct. The reservoir is equipped
with a sight gauge. Should hydraulic uid need to be added or replaced, use only factory approved
hydraulic uid.
This specication covers hydraulic uids which are approved by engineering for use in the ECAT
system at a temperature range from -50 °F to 140 °F (-46 °C to 60 °C).
2.7.1 Approved Fluids
Standard Fluid [use with -20 °F to 140 °F (-29 °C to 60 °C) applications]
ConocoPhillips Megaow™ AW HVI Hydraulic Oil 22
Shell Tellus S2 V 22
Mobil DTE 10 Excel™ 22
Low Temperature Fluid [use with -50 °F to 140 °F (-46 °C to 60 °C) applications]
Mobil Univis™ HVI 13
Although other brands of uid matching the same specications may be used, to maintain the
warranty and ensure trouble free operation, always check with the factory before substituting any
other uid.
2.8 Accumulator
2.8.1 Introduction
The ECAT Actuator is equipped with a hydraulic accumulator. As the accumulator utilizes the
pressurized pipeline gas, the ECAT will be in an unpressurized state when shipped from the factory.
When using this procedure, refer to the ECAT Actuator General Arrangement drawing and Hydraulic
Schematic for the unit being worked on. Schematics shown in this document are for illustration
purposes only.
! WARNING
This unit contains high-pressure hydraulic uid and high pressure pipeline gas. Exercise caution when
performing any type of maintenance. Wear proper safety attire and required personal protective
equipment, including safety glasses.

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Section 2: Installation
Installation
2.8.2 Pipeline Gas connections – Refer to schematic 11547-S
a. Locate Upstream Isolation Valve (90) and Downstream Isolation Valve (91) (optional)
for upstream and downstream pipeline gas connections, called out on the General
Arrangement Drawing and Hydraulic Schematic (see Figure 3).
b. Close the Upstream Isolation Valve (90) and Downstream Isolation Valve (91)
(optional) remove the pipe plugs.
NOTE:
Connection to the Downstream Isolation Valve (91) is optional. The isolation valves NPT thread size
will vary based on actuator model size.
c. Open Accumulator Hydraulic Isolation Valve (74) and Thermal Volume Controller
Hydraulic Isolation Valve (75).
d. Connect the pipeline gas to isolation valves (90) and (91).
e. Ensure the Pneumatic Blow Down Valve (87) is closed.
f. Ensure Pneumatic Isolation Valve (Lockable) (83) is open.
g. Slowly open isolation valves (90) and (91).
h. Slowly open Pneumatic Blow-Down Valve (87) to purge the pneumatic side of the
control of air. Close valve (87).
NOTE:
The pneumatic side of the ECAT is pressurized and the isolation valves (90) and (91) should remain
open until maintenance of the ECAT is required.
Table 3. Typical ECAT Accumulator System
Part Number Part Name
74 Accumulator Hydraulic Isolation Valve
76 Accumulator (Piston Type)
75 Thermal Volume Controller Hydraulic Isolation Valve
77 Thermal Volume Controller
83 Pneumatic Isolation Valve (Lockable)
87 Pneumatic Blow-Down Valve
90 Upstream Isolation Valve
91 Downstream Isolation Valve (Optional)

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Section 2: Installation
Installation
Figure 3
PNEUMATIC
MANIFOLD
GAS PIPELINE
2.8.3 Pneumatic Fitting Leak Check
With pipeline pressure applied to the pneumatic side of the ECAT circuit, check to ensure there are no
leaks at the ttings. Use a leak detection product such as Snoop liquid leak detector from Swagelok
or comparable.
If any leaks are detected, close isolation valves (90) and (91) and open Pneumatic Blow-Down Valve (87)
to vent all pressure from the circuit.
Repair any leaks present and repeat steps from Section 2.8.2.
! WARNING
This unit contains high-pressure hydraulic uid and pipeline gas. Exercise caution when performing
any type of maintenance. Wear proper safety attire and required personal protective equipment,
including safety glasses. Ensure the accumulator has been drained of all hydraulic and pipeline gas
pressure before attempting any repair.

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Section 3: Electrical Connections
Electrical Connections
Section 3: Electrical Connections
3.1 Main Electrical Connections
Refer to the project specic wiring diagram for the electrical connections to the MCC.
3.2 Sealing Cable / Conduit Entries
Seal the cable and conduit entries in accordance with the National Electric Code or your country
standard and applicable local codes. All conduit entries should be sealed against the site
environment. All unused conduit entries must be sealed with threaded metal plugs.
! WARNING
Always verify electrical power is disconnected before opening the motor starter enclosure.

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Section 4: Set-up / Start-up Procedure
Set-up / Start-up Procedure
Section 4: Set-up / Start-up Procedure
In addition to this set-up / start-up procedure, the following documentation will be necessary to fulll
all set-up and start-up requirements.
1. General Arrangement drawing
2. Bill of Material
3. Schematic drawing
4. Wiring Diagram drawing
When using these instructions, refer to the schematic diagram, wiring diagram, general arrangement
drawings for the ECAT and the certied bills of material.
Numbers in [ ] correspond to components labeled on the wiring diagram. Numbers in ( ) correspond
to components labeled on the schematic diagram. Information in (( )) is descriptive.
When the ECAT is delivered to the job site, it has been both pressure and function tested. The oil
reservoir was lled to operation level when it shipped from factory.
4.1 Preparation
4.1.1 Safety First
! WARNING
Hydraulic Pressure
Ensure that test personnel and witnesses are properly informed of the hazards involved with high
pressures and the proper safety barriers are employed. Never check for leakage using your ngers or
hands. Fluid under high pressure can inject into the skin and cause severe damage or death. Always
use an implement such as a piece of paper or shop rag.
! WARNING
Safety Equipment
All personnel in the testing area must always wear safety glasses.
4.1.2 Material and Equipment for Start-up and Set-up
To complete this procedure, you will also need the following materials and equipment:
Table 4. Required Material and Equipment
Required Material and Equipment
Miscellaneous ttings, adapters and Hand Tools: complete complement of open end
((SAE and metric)) wrenches, screw drivers Philips and at blade and a set of hex wrenches
Primary Power Source for the ECAT
((check the ECAT System Electrical Diagram for requirements))
Supplemental quantity of hydraulic uid, if needed
((See Section 2.7, Hydraulic Fluid, and ECAT specication for required uid type))

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Section 4: Set-up / Start-up Procedure
Set-up / Start-up Procedure
4.2 Initial Check of the Unit
4.2.1 Check to ensure all hydraulic tube ttings are tight. Vibration during shipment may have
loosened connections.
4.2.2 Visually inspect the unit to make sure tubing, hand valves, gauges and other equipment
have not been damaged.
4.2.3 Using the actuator control schematic drawing, verify that the Flow Control Valves are fully
opened ((turn stem completely counterclockwise)).
4.2.4 Ensure System Bypass Hand valve (71) is closed.
4.2.5 Ensure the Accumulator Hydraulic Isolation Valve (74) and Thermal Volume Controller
Hydraulic Isolation Valve (75) are open.
4.2.6 Ensure Power Oil Isolation Valve (73) is closed.
4.3 Initial Connections
Electrical connections should have been made to the MCC (Motor Control Center). If power is not
connected, follow the instructions under Section 3, Electrical Connections, before continuing.
! CAUTION
Before the actuator is stroked, ensure the reservoir has been lled with uid to the proper level.
(See Section 2.7, Hydraulic Fluid.)
4.4 Initial Pre-Charge
Refer to Section 2.8 Accumulator for the pre-charge setup of the ECAT.
4.5 Initial Reservoir Fill
Ensure the ECAT Oil Reservoir (60) is lled to the proper oil level. Remove the Hygroscopic Breather (61)
if uid needs to be added to the reservoir.
4.6 Hydrostatic Pressure / Function Test
The Accumulator has already been hydrostatic tested per A.S.M.E. requirements and does not require
re-testing. This test is to discover if any leaks have developed in the hydraulic ttings during shipment.
4.6.1 Ensure Isolation Valves (90), (91) (optional) and (83) are open.
4.6.2 Ensure Accumulator Hydraulic Isolation Valve (74) and Thermal Volume Controller
Hydraulic Isolation Valve (75) are open.
4.6.3 Ensure the Power Oil Isolation Valve (73) is closed.
4.6.4 Open the reservoir Isolation Valve (65).
4.6.5 Open the System Bypass Valve (71).

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Section 4: Set-up / Start-up Procedure
Set-up / Start-up Procedure
4.6.6 Verify all electrical connections are made per Section 3 of this procedure. Ensure the
[Hand/Off/Auto] selector switch is set at Off. Turn main power on to the ECAT unit. The
Power On light on the MCC should be illuminated.
4.6.7 Check rotation of the motors by jogging the [Hand/Off/Auto] selector switch to [Hand].
The motor must rotate clockwise when viewed from the back of the motor.
4.6.8 Turn the [Hand/Off/Auto] selector switch, on the MCC, to the [Auto] position. The motor
will start-up and run.
! CAUTION
Observe entire system for leakage and be prepared to stop the motor immediately should any develop.
Make any needed corrective actions.
4.6.9 Allow the Electric driven Hydraulic Pump (67) to run several minutes circulating uid from
the reservoir through the System Bypass Valve (71) and back to the Reservoir (60) to
eliminate most of the air in the hydraulic lines.
4.6.10 With the motor running, slowly close the System Bypass Valve (71). Check Hydraulic
Pressure Gauge (79) to observe pressure build up in the hydraulic lines and uid will start to
ll the Accumulator.
4.6.11 Observe the Level Viewer (62) to ensure enough uid is present to ll the Accumulator (76). In
the event the uid level drops to the trip point of the Level Switch (63), the Electric Motor (69)
will stop. Add uid to the Reservoir (60) if needed.
4.6.12 Allow the Pump to run lling the Accumulator until the Thermal-Volume Controller moves
and trips the Motor Start / Stop Switch (78) stopping the Electric Motor.
4.6.13 Slowly open the System Bypass Valve (71) and relieve the pressure in the hydraulic lines until
the electric Motor starts to run. Close the System Bypass Valve. Allow the motor to run until
the pump lls the Accumulator and the Thermal-Volume Controller shuts the motors off.
4.6.14 Perform step 4.6.14. 3 to 4 times so that air can be worked out of the system. Allow the
Electric Driven Pump (67) to run until it is stopped by the Motor Start / Stop Switch (78).
4.6.15 Maintain this pressure for 5 minutes while visually inspecting the hydraulic system for leaks.
Corrective action must be taken for any leaks found.
! CAUTION
Relieve system pressure before tightening any leaking ttings.
4.6.16 Turn the [Hand/Off/Auto] selector switch to [Off].
4.6.17 Open the System Bypass Hand Valve (71) and relieve the pressure in the hydraulic lines.
4.6.18 Close the System Bypass Hand Valve (71).
The hydrostatic test is now completed.

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Section 4: Set-up / Start-up Procedure
Set-up / Start-up Procedure
4.7 Final Start-Up Procedure
The system should already have the pipeline gas pressure applied to the pneumatic side of the system
per Section 2.8. Verify the connections and pressure reading on Pneumatic Pressure Gauge (88).
The header lines up to Power Oil Isolation Valve (73) should be lled and purged of all air per Section 4.6.
Under normal operating conditions, the [Hand/Off/Auto] selector switch will be set to [Auto].
Refer to the Actuator and Control IOM for specic steps in operating the actuator and control in
conjunction with the ECAT hydraulic system.
4.8 Optional Instrumentation
The ECAT system can be supplied with a Hydraulic Pressure Switch (Low System Pressure) (80)
and/or Pneumatic Pressure Switch (Low Pressure) (89), Return Filter with Bypass and Indicator (66),
or Downstream Isolation Valve (91) as an option.