Johnson Controls VA-9070 Fascicule

VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating

Service Installation Instructions

1

When mounting the actuator in the standard position, 
orient the actuator with its handwheel in a vertical plane 
and parallel to the pipeline. When mounting the 
actuator on a vertical pipe, position the acutator with 
the conduit entries on the bottom to prevent 
condensation from entering the actuator by way of the 
conduit. In all cases, position the conduit to prevent 
drainage into the actuator.

Mount the actuator to the valve using the following 
procedure:

1.

Manually operate the actuator until the output shaft 
of the actuator lines up with the valve stem. If 
possible, use an intermediate position (such as 
valve disc/stem and actuator half-open).

2.

Place the proper sleeve adaptor (if required) onto 
the valve stem. Apply a small amount of grease to 
the sleeve adaptor to ease assembly.

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.

Connect the actuator to field wiring:

•

The heaters use approximately 0.5 amperes at 
110 volts.

•

Remove the metal conduit plug for the power 
connection. Each actuator has two conduit entries 
(one for power and one for control). The remaining 
square-head conduit plug is weatherproofed but 
may eventually degrade. If the square-head 
conduit plug degrades, replace it with a metal plug.

•

The motor full load current is noted on the 
nameplate of the actuator. 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. 

•

Terminate all field wiring at the actuator terminal 
strip in accordance with the wiring diagrams 
attached to the inside of the actuator cover.

•

Properly seal the conduit connections to maintain 
the weatherproofed integrity of the actuator 
enclosure.

You must set the electrical travel switches to trigger 
prior to reaching the mechanical travel stops. The 
travel switches are labeled for open and close. The 
cams are color-coded (green for open; red for closed).

Manual travel stops are designed to prevent manual 
overtravel, not to stall the electric motor. The travel 
stops have an adjustment range of approximately 
10 degrees.

1.

Loosen the mechanical stop for the closed 
position, and back it off so that it does not interfere 
with actuator travel. The closed stop is located on 
the right when viewed from the travel stop side of 
the actuator.

2.

Remove the indicator rotor by pulling it up. This 
action exposes the machined groove on the end of 
the camshaft, which is the reference for the valve 
disc position.

3.

Manually operate the actuator handwheel 
Clockwise (CW) until the valve reaches the desired 
closed position.

4.

Rotate the red adjusting knob (by hand or with a 
flat-head screwdriver) until the cam lobe barely 
trips the switch from a CW direction.

Note: If the rotation of one cam moves the other cam, 
hold the other knobs or cams during adjustment.