Product Overview

a. To achieve 60° of damper rotation, position the crank arm so that it is pointed towards the actuator at 30° from its mid-

stroke position.

b. To achieve 90° of damper rotation, position the crank arm so that it is pointed towards the actuator at 45° from its mid-

stroke position.

6. Install the damper rod by sliding one end through the ball joint connector mounted on the damper crank arm, and the other

end through the straight connector on the actuator crank arm. Tighten the nut on the actuator crank arm’s straight connector.

Cut off any excess length of damper rod.

7. For normally open dampers, tighten the nut on the ball joint connector on the damper crank arm. To ensure that the damper

closes completely, make adjustments so that the actuator is 1/16" (1.6 mm) from the extended end of stroke when the

damper closes. Verify and, if necessary, make final adjustments during system checkout.

8. For normally closed dampers, rotate the damper crank arm until the damper is closed. While holding the damper closed,

tighten the nut on the ball joint connector on the damper crank arm. To ensure that the damper closes completely, make

adjustments so that the actuator is 1/16" (1.6 mm) from the retracted end of stroke when the damper closes.

Final adjustment of the actuator and damper must be performed when the system is powered and functioning. Refer to the

CHECKOUT section to ensure that the damper is linked correctly.

Valve

For valve assembly details refer to AV-600, Valve Linkage Kit General Instructions, F-26279 or AV-601, Linkage Extension

Kit General Instructions, F-26280. Refer to Figure-19 for external dimensions of the valve actuator.

Adjustments

Start Point Adjustment

The start point of the actuators are factory-set at 6 Vdc and are field-adjustable, from 2 to 12 Vdc. If a start point other than 6 Vdc

is required, proceed as follows:

1. Using a screwdriver, pry and remove the plug button from the base of the actuator, to expose the start point adjuster. Refer to

Figure-16.

2. Disconnect the red, yellow, and blue actuator leads from the controller.

3. Connect the like-colored leads of TOOL-202 to the actuator leads.

4. Connect a DVM to the yellow lead (positive) and blue lead (negative) of the actuator.

5. Adjust TOOL-202 until the DVM reading equals the required start point voltage (2 to 12 Vdc).

6. Using a small, single-slotted screwdriver, adjust the actuator start point so that the actuator shaft just begins to extend.

7. Reinstall the plug button by pressing it into the base of the actuator.

8. The start point adjustment is complete.

CHECKOUT

After the entire system has been installed and the actuator has been powered up, perform the following checks for proper system

operation.

Figure-16 Start Point Adjuster for MP-5400 Series.

Position Indication

Start Point

Adjuster

MP-5400 Series