N o t e :
SurePowr actuators can be supplied for clockwise or counter-clockwise 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 oriented 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 a
minimum of #18 AWG stranded wire.
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. Loosen the setscrews on Cams 1 and 3. Rotate both
counter-clockwise until they clear the switch arm rollers of Switches 1 and 3.
b. Rotate Cam 1 clockwise until it comes in contact with Switch 1’s arm roller and the switch “breaks”. A light “click” can be heard.
Tighten the set-screws on Cam 1.
c. Rotate Cam 3 clockwise until it comes in contact with Switch 3’s arm roller and the switch just “breaks”. A light “click” can be heard.
d. Rotate Cam 3 slightly further in the clockwise direction. (This ensures that Switch 3 will “break” just prior to the actuator reaching the
full fail position.) Tighten the setscrews on Cam 3. Energize the actuator. This will move the actuator to the opposite end of travel.
e. Upon reaching the opposite end of travel, Cam 2 should just engage the roller on Switch 2 so that the switch just “breaks”.
This action will stop the actuator. Check that the actuator has properly positioned the driven equipment.
f. If actuator travel is insufficient, rotate Cam 2 slightly clockwise until the cam just clears the roller of Switch 2. As soon as the
cam clears the roller, the actuator will “bump” electrically towards the end of travel. Continue until the actuator reaches the full
end of travel.
S U R E P O W R
TM
S E R I E S - S U R E 4 9
F I E L D I N S T A L L A T I O N I N S T R U C T I O N S
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.
Safety First
Installation
To p r e v e n t i g n i t i o n o f h a z a r d o u s a t m o s p h e r e s ,
d o n o t r e m o v e a c t u a t o r c o v e r w h i l e c i r c u i t s a r e l i v e .
L o a d e d s p r i n g i n s i d e a c t u a t o r. D o n o t a t t e m p t t o r e p a i r a c t u a t o r
b e l o w t o p g e a r p l a t e , u n l e s s p r o p e r l y t r a i n e d o n r e p a i r m e t h o d s .
Cam 1
Cam 2
Cam 3
Cam 4
Switch 4
Switch 3
Switch 2
Switch 1
F i g u r e 1
1
