Flowserve Ramcon Series Electric Actuators - Manual (Page 2)

2 17710-B
Flow Control Division
McCANNA Actuation Systems
Storage
If the actuator is not to be installed as soon as received, heated
indoor electrical instrument storage conditions must be provided. The
actuator and any auxiliary equipment should be protected from
corrosive materials and atmosphere, flooding, and dirty conditions.
Conduit openings should be plugged and must not be subjected to
rain, snow or water hosing. Storage must be in a place where other
materials will not be placed or dropped on the actuator.
Installation
Installation of this actuator in applications where life-threatening
conditions can be expected must include adequate
monitoring/warning, interlock, and/or redundant control equipment.
Electrical
A. The wiring and conduits must be installed in accordance with all
local codes and consistent with good practice for electrical work.
B. In hazardous areas the conduit seals required must be locally
installed. No conduit seal is provided in the actuator.
C. If the actuator case is used as a splice box, the cover must be
kept in place except when actually wiring or making adjustments.
When replacing the cover all wires must be clear of pinch and
scrape points and, if gasketed, proper gasket positioning must be
observed.
D. Each actuator must have its own control switch. Do not operate in
parallel with another actuator or other equipment.
E. Required and optional electrical connections are shown on the
wiring schematic(s) supplied with the actuator (located either on
the motor O.D. close to terminal block or inside of the housing)
and also shown on page 3.
CAUTION: The typical wiring schematics shown may not show
all wiring for actuators with optional features and must not be
used as the basis for final wiring.
Single-phase AC actuator: (Verify that the nameplate voltage is the
same as the AC supply voltage.) Connect actuator leads to the AC line
as shown on the wiring schematic.
DC actuator: (Verify that the supply voltage matches the nameplate
voltage.) The actuator rotation depends upon polarity at the terminals
and it is essential that the polarity of connections be as shown on the
wiring schematic supplied with the actuator.
Mechanical
A. The valve or other load to be driven must be free of obstructions
and must turn freely throughout its entire operating range.
B. If mechanical stops are a part of the equipment, adjustment of
these stops is necessary to avoid contact during normal
operation. Limit switch must stop motor before mechanical stops
are contacted.
C. If the actuator is to be field-mounted be sure that it is positioned
so that the operating range is compatible with the load; i.e., if load
is at its extreme clockwise position the actuator output shaft must
also be at the same clockwise limit.
D. When positioning the actuator for a direct in-line connection to a
valve, the two shaft centerlines must coincide to assure proper
operation and to avoid excessive side loading of either shaft. A
coupling with cross slots will provide some compensation for
small misalignment. Position so that there is not axial loading of
either shaft at any point of travel.
E. If connection is other than direct coupling, the linkages used must
operate freely and must be clear of all obstructions throughout
the complete travel range.
F. Unless specifically required to make other adjustments, the
actuator shaft travel for standard units will be clockwise when
viewed from the motor and cam side, or counter-clockwise when
viewed from the mounting flange side of the actuator with the
yellow and red circuit energized. The same is true for DC
actuators with polarity connection as shown on the wiring
schematic. Reversible actuators (standard configurations) will
rotate counter-clockwise, motor and cam end, when the yellow
and black leads are energized.
G. If adjustments are required, cam settings can be changed. (See
figures 1, 2, 3, and 4)
Maintenance
Maintenance recommendations given are for the typical or average
installation conditions. In severe installation conditions including
items such as corrosives, extremes of heat and cold, humidity, etc.,
and where the potential for dangerous or life-threatening conditions in
case of malfunction exist, more frequent and thorough maintenance
procedures will be required. Local conditions and procedures must be
used to determine an appropriate inspection and/or maintenance
program.
The McCANNA Ramcon electric actuator is completely enclosed by a
rugged housing designed to resist the most frequently encountered
installation atmospheres, and contains a closed, grease-filled gear
train. All standard AC motors are brushless induction types with no
commutators or brushes to wear or get dirty. For many installations
no formal or only minimum maintenance procedures will be required.