VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin
5
3. Install the furnished mounting studs by threading them all the way into the
actuator base. Insert the short, threaded length into the actuator.
4. Mount the actuator onto the valve stem. Be sure the mounting studs are
properly aligned with the holes in the top plate of the valve or the mounting
bracket. If necessary, manually override the actuator to align the mounting
studs with the mounting holes.
5. Lower the actuator onto the valve and secure it tightly in place with the
furnished hex nuts and lock washers.
Wiring
Connect the actuator to field wiring:
1. Remove the metal conduit plug for the power connection. Each actuator has
two conduit entries (one for power and one for control).
2. Terminate all field wiring at the actuator terminal strip in accordance with the
wiring diagrams attached to the inside of the actuator cover.
Note:
The terminal strip accepts wire sizes ranging from 10 to 22 AWG
(12 to 22 AWG for the servo). Do not use wire smaller than 18 AWG.
Note:
The motor full load current is noted on the nameplate of the actuator.
Note:
The heaters use approximately 0.5 amperes at 110 volts.
3. Properly seal the conduit connections to maintain the weatherproofed integrity
of the actuator enclosure.
Note:
The square-head conduit plug is weatherproofed but may eventually
degrade. If the square-head conduit plug degrades, replace it with a
metal plug.
Figure 1 shows typical field wiring for a two-position actuator, whereas Figure 22
shows typical field wiring for a modulating actuator.
