Johnson Controls VA-9070 installation instructions Mounting, Wiring, Setup and Adjustments

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

Installation Instructions

Code No. LIT-977322

Issued May 29, 2007

Supersedes March 14, 2005

Mounting

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.

Wiring

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.

Setup and Adjustments

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.

Closed Travel Switch and Travel Stop Adjustment

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.

VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating	1
Service Installation Instructions