User Guide

ManualsBrandsBarber Colman ManualsDampers120V Floating Valve Damper Actuator 50 lb-in (180° Rotation)

CHECKOUT

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

the following checks for proper system operation.

Caution:

Never power the actuator without a spring return linkage attached.

Go, No-Go Test 1. If actuator is MP-52xx-xxx-0-3 or older model, install the AD-8969-612 filter capacitor (not

required for MP-52xx-xxx-0-4 or newer models).

2. The actuator should be powered.

3. Disconnect the control leads from the controller.

4. To make the actuator shaft extend fully, short the red lead to the yellow lead.

5. To make the actuator retract fully, short the blue lead to the yellow lead.

6. Check for proper operation of the valve or damper as the actuator is operated.

7. Reconnect the control wiring.

Positioning with

Controller

If the sensed media is within the controller’s setpoint range, the actuator can be positioned

by adjusting the controller setpoint up and down. Check for correct operation of the actuator

(valve or damper) while the actuator is being stroked.

THEORY OF OPERATION

Refer to Figure-18. The permanently sealed, oil-filled case contains a movable hydraulic

piston assembly and an electric pump/motor for the hydraulic system. The electric

pump/motor is powered by the input supply voltage and runs continuously, generating a fluid

pressure which is transmitted to the top of the piston. This fluid pressure creates a hydraulic

force which drives the piston downward. Opposing the hydraulic force is the spring of the

valve or damper linkage. When the hydraulic force becomes great enough to overcome the

opposing spring force, the piston translates downward, extending the output shaft.

The pump/motor contains a transformer winding which provides power to the Vdc power

supply. The power supply, in turn, provides power to the transducer assembly. To

proportionally position the shaft, first the control signal (2 to 15 Vdc) input is compared to the

shaft position feedback signal, through the actuator controller circuit. Then, the actuator

controller circuit emits an output signal which positions the flapper in the transducer. The

flapper opens or closes further to decrease or increase the hydraulic pressure above the

piston, resulting in an upward or downward movement at the shaft.

Oil-Filled Case

Transducer

Assembly

Electric

Motor/Pump

Controller Printed

Circuit Board

Yellow (+)

Blue (-)

Feedbac

Vdc Power

Supply

Hydraulic Piston

Assembly

To AC Power

Source

Controller

Input

Figure-18 MP-5200 Series Actuators.