The AmurAct actuator is a fast stroking industrial electric actuator
mated to four different series of industrial control valves ranging in
size from ½” to 4” depending on series and profile. The new generation
of Motors covered in this IOM allow the user to select either a linear
stem lift or a non-linear stem lift by means of a dipswitch. Linear stem
lift is the factory default dipswitch selection. Linear stem lift means
the stem position is linear with respect to the input signal. For exam-
ple if the valve is closed with a 0% input signal, the valve will be at 25%
Stroke with a 25% input signal, at 50% Stroke with a 50% input signal,
at 75% Stroke with a 75% input signal, and at 100% Stroke with a 100%
input signal. Linear stem lift preserves the inherent flow characteristic
of the valve. This feature is applicable only to 2-way valves.
When non-linear stem lift is selected the actuator has an ever gain
changing stroke curve that accelerates in the last half of the stroke
and is relatively slow on startup. Extreme gain changes as present in
the Non- liner configuration are difficult for a control system to man-
age. If an application’s turndown requirements are only 3:1 to 5:1 for
example such that a valve could be sized to only operate from 50%
to 100% of stroke, some level of speed of response can be achieved
in the Non-linear configuration. The non-linear configuration is appli-
cable to 3-way valves. Otherwise, in all other circumstances, the Linear
Stem Lift (factory default) will be the desired setting.
In either case, correct control valve sizing is critical to good operation.
See individual product specifications for details on the control valve
assemblies and Cv tables. This document will focus on the installation,
operation, and maintenance of the actuator portion only.
TABLE OF CONTENTS
Overview ..................................................Cover
Description .......................................................2
Theory of Operation ......................................3
Safety Precautions..........................................4
Wiring & Dipswitch Settings ...................5-7
Initial Start-up and Operation ....................8
Standard vs High Temperature ..................9
Remove Motor .................................................9
Remove/Install/Calibrate Linkage ...11-14
Troubleshooting .......................................... 15
Operating Tips .............................................. 15
Typical Assembly Drawings ...............16-23
AMURACT IOM
This product serves a variety of applications very well but is particu-
larly well suited to semi-instantaneous water heaters, heat exchangers
and coils where response times to load changes are expected to be
handled in two to three seconds. With the High Temperature LE link-
age option, thermal fluids, superheated steam and high temperature
hot water are safely served. With the NEMA 4X Option, many hose
down and outdoor applications are possible.
* Enerdrive® Failsafe System for Fail Close or Open (selectable)
* Full Range of AC and DC Voltage Supplies Available
* Universal Input (Voltage or Milliamp) and pushbutton stroke
calibration
* All Stainless Steel Linkage Construction with maintenance free
Oilite® bearings
PRODUCT OVERVIEW
APPLICATIONS & KEY FEATURES
AMURACT_ IOM_RevK_0415
AMURACT ACTUATORS
LS & LE LINKAGES with F3, F4, F5, & F6 MOTORS
Installation Operation and Maintenance Instructions
