Dresser RCS Sure 24 Installation Manual

RCS Sure 24/25
Installation Manual
Safety First
In the maintenance and operation of mechanical equipment, SAFETY
is the basic factor which must be considered at all times. Through
the use of the proper clothes, tools and methods of handling,
serious accidents causing injury to you or your fellow workers can be
prevented.
Throughout this manual are listed a number of safety precautions.
Study them carefully and follow them; also insist that those working
for you do the same. Remember, an accident is usually caused by
someone's carelessness, neglect or oversight.
CAUTION
To prevent the ignition of hazardous atmospheres,
do not remove actuator cover while circuits are live.
CAUTION
Loaded spring inside actuator. Do not attempt to
repair actuator below top gear plate, unless properly
trained on repair methods.
Installation
Note: SurePowr actuators can be supplied for clockwise or counter-clock-
wise spring driven rotation (viewed from the top of the actuator). The
spring drive rotation is noted on the actuator name tag and wiring
diagram. Ensure that the actuator has been supplied with the proper
spring drive operation for the application prior to installation on the
driven device.
1. The actuator is shipped in the power off (fail) position.
Ensure that the driven device is orientated to its fail position
prior to installation of the actuator.
2. Care should be taken to maintain proper alignment between
the actuator and the device shaft. If the actuator is not in the
correct alignment with the device shaft, repeat the
procedure in Step 1.
3. Mount the actuator to the device. Ensure the actuator is
centered properly with the device shaft, and then tighten all
bolts and nuts evenly.
4. Remove the cover bolts located around the actuator motor
and control cover flange.
5. Terminate field wiring per the appropriate RCS wiring
diagram, supplied with the actuator. Use aminimum of #18
AWG stranded wire.
Note: Ensure the driven device is properly positioned in its full fail
position. If it is not, use the adjustable end of travel stop on the Sure
24/25 (see figure 4) to properly adjust the fail end of travel stop. Only
the fail end of travel may be adjusted. Loosen the lock nut to free the
adjusting screw, then use an allen wrench to turn the screw. The total
adjustment available is +/- 5 degrees.
Figure 1
Switch adjustments for clockwise spring fail operation
(viewed from the top of the actuator)
a. Ensure actuator is de-energized and positioned in the
clockwise (fail) position. Ensure the end of travel stop
is properly adjusted. Rotate the screw clockwise to
move the actuator output shaft in a counter-clockwise
direction. Rotate the screw in a counter-clockwise
direction to move the actuator output shaft in a clock
wise direction. Loosen the setscrews on Cam2.
Rotate counter-clockwise until it clears the switch arm
roller of Switch 2.
b. Rotate Cam 2 clockwise until it comes in contact with
Switch 2's arm roller and the switch "breaks". A light
"click" can be heard. Tighten the set-screws on
Cam 2.
c. Energize the actuator. This will move the actuator to
the opposite end of travel.
RCS Actuators