Honeywell ml6284 User Manual

63-2505    G.R.  06-04 

www.honeywell.com

Honeywell International Inc.

Honeywell Limited-Honeywell Limitée

1985 Douglas Drive North

35 Dynamic Drive

Golden Valley, MN  55422

Scarborough, Ontario
M1V 4Z9

Perform the following steps to checkout the ML6284

 Non-Spring Return Direct Coupled Damper Actuator.

1. Check the actuator position indicator and the damper 

shaft position to see that they agree.

2. If the actuator has time-out function, apply 24 Vac to 

black (T1) lead and red (T2) lead. See Fig. 5.

3. Apply 24 Vac control signal to blue (B) lead with respect 

to black (T1) lead (see Fig. 5). Actuator should drive 

damper open.

4. Apply 24 Vac control signal to yellow (W) lead with 

respect to black (T1) lead (see Fig. 5). Actuator should 

drive damper closed.

5. If 24 Vac control signal is removed, actuator should 

stop.

Perform the following troubleshooting steps if the actuator 

does not drive, travel full stroke, or operate properly during the 

checkout. 

NOTE: Perform these steps before replacing the actuator.

1. Check the actuator label to verify that proper power and 

control signal requirements have been met.

2. Check for 24 Vac at actuator black (T1), yellow (W) or 

blue (B), and red (T2) [if actuator has time-out function] 

leads when the actuator should be driving. If the voltage 

is not present or is low, check power supply and 

controller.

3. If the actuator does not drive in the correct direction 

when a control signal is applied, reverse the yellow and 

blue wires.

4. Remove power and fully depress and hold disengage 

button down while turning damper shaft clockwise 

 

and counterclockwise

. If the damper shaft turns 

freely through the entire 90¡ stroke and the actuator is 

installed correctly, replace the actuator.

5. If the damper shaft will not turn freely for the full 90° 

check for any bind and make sure the actuator is loose 

on the mounting bracket. If necessary, adjust mounting 

bracket to prevent binding.

6. If no binding is noticed in the actuator and damper 

assembly, remove the actuator and turn the damper 

shaft clockwise

and counterclockwise

. If 

the damper does not turn freely, repair or replace the 

damper.

7. If the damper turns, fully depress and hold the actuator 

disengage button down and turn the actuator hub 

clockwise

 and counterclockwise

. If the 

actuator hub does not turn, replace the actuator.

8. If the actuator and damper turn freely, remount the 

actuator to the damper in accordance with the 

instructions in the Installation section. Make sure the 

actuator and mounting bracket do not bind. Make sure 

the actuator and damper are both at the same end stop 

(clockwise

or counterclockwise

) when they 

are assembled. Hook up the wires and repeat the 

checkout. Troubleshoot again, if necessary.

L1 

(HOT)

L2

1

1

RED
BLACK

RED

BLACK

M4886A

POWER SUPPLY.  PROVIDE DISCONNECT MEANS 

AND OVERLOAD PROTECTION AS REQUIRED.

CONTROLLER

CONTROLLER

BLUE

YELLOW

BLUE

YELLOW

L1 

(HOT)

L2

1

1

BLACK

BLACK

M4887A

POWER SUPPLY.  PROVIDE DISCONNECT MEANS 

AND OVERLOAD PROTECTION AS REQUIRED.

CONTROLLER

BLUE

YELLOW

BLUE

YELLOW