User Guide

ManualsBrandsBarber Colman ManualsDampersSpring Return Valve Actuator for VB-7XXX Series

MANUAL OVERRIDE OPERATION

When necessary, the actuator’s output shaft can be repositioned using the manual override

mechanism as follows:

1. Disconnect power from the actuator. The actuator will fully retract.

2. Without pushing down on the crank, crank the manual override counterclockwise until

the actuator extends to the desired position. Push in until the mechanism locks in

position. (The manual override lock will release the next time power is applied.)

3. If you desire to reposition the actuator manually from a locked position, turn the crank

1/8 turn counterclockwise and pull out to release. Adjust position as desired.

Caution:

• Only use manual override when the actuator drive motor is not powered.

• Engaging the manual override when the actuator is powered may cause damage to the

gears.

• Using power tools to adjust the override will cause damage to the gears.

Wiring Requirements Control Leads

See Table-2 for power wiring data. Refer to Figure-1 through Figure-7 for typical wiring.

Table-2 Power Wiring

CHECKOUT

After the entire system has been installed and the actuator has been powered up, the

following check can be made for proper system operation. Check for correct operation of the

valve while actuator is being stroked.

1. Apply power to the actuator. Actuator and valve should be driven to their powered position

0°0°

180°

90°90°

180°

Figure-13 Unacceptable Mounting Orientation

Actuator

Voltage

Part Number

Maximum Wire Run in ft. (m)

12 AWG14 AWG16 AWG18 AWG20 AWG22 AWG

24 Vac

20-30 Vdc

MA51-7103

1678

(512)

1055

(322)

664

(202)

417

(127)

263

(80)

208

(63)

MF51-7103

1289

(393)

810

(247)

510

(155)

321

(98)

202

(61)

160

(49)

MS51-7103

1140

(348)

717

(219)

451

(137)

284

(86)

178

(54)

141

(43)