Summary of the content on the page No. 1
ML6284
Non-Spring Return
Direct Coupled Damper Actuator
PRODUCT DATA
FEATURES
Mounts directly on 3/8 in. to 5/8 in. (10 to 17 mm) round
and square and 3/4 in. (19 mm) round damper shafts by
using the appropriate insert. Most models are shipped
with 1/2 in. insert.
Provides 150 lb-in. (17 Nm) running torque.
Magnetic coupling eliminates the need for mechanical
stops or limit switch adjustments by limiting stall
torque to 250 lb-in. (28.3 Nm) maximum.
95° stroke provides necessary c
Summary of the content on the page No. 2
ML6284 NON-SPRING RETURN DIRECT COUPLED DAMPER ACTUATOR SPECIFICATIONS Models: Actuator Timing at 90° Stroke: ML6284: Non-Spring Return Direct Coupled Damper Actua- 92 ± 2 seconds synchronous at 60 Hz from -4°F to 140°F tors. (-20°C to +60°C). ML6284A: High Torque (150 lb-in.) Direct Coupled Damper 110 ± 2 seconds synchronous at 50 Hz from -4°F to 140°F Actuator without auxiliary switches or time-out function. (-20°C to +60°C). ML6284C: High Torque (150 lb-in.) Direct Coupled Damper Non synchr
Summary of the content on the page No. 3
ML6284 NON-SPRING RETURN DIRECT COUPLED DAMPER ACTUATOR 4 (102) 3-3/32 (79) 7/16 (11) 1-17/32 (39) 9/32 (7) 3 PLACES 1-1/4 (32) 1 8-7/16 (215) 7-11/16 (196) 1/2 (12) 36 (914) 1-29/32 (48) 13/32 (10) 5/8 (17) 3-5/32 (80) 1/4 (6) 2 1/8 (3) (51) 1/4 (6) 3/4 1 (25) 7/8 (22) 1/2 (19) (13) 15/16 (24) 1/2 (13) 1-11/16 (43) 1/2 (13) 2-1/2 (63) 3-5/16 (84) 1 REMOVABLE RETAINING RING FOR REMOVAL OF HUB SLEEVE 4-1/2 (114) 5 (127) M7618B 6 (152) Fig. 1. Approximate dimensions of ML6284 Non-Spri
Summary of the content on the page No. 4
ML6284 NON-SPRING RETURN DIRECT COUPLED DAMPER ACTUATOR Environmental Protection Ratings: NEMA1 standard with Install the actuator in a location that allows enough clearance damper shaft in horizontal position. for mounting accessories and for servicing. Accessories: Mounting 205617 Hub Insert, 3/4 in. round. 205753 Hub Insert, 3/8 in. The ML6284 Non-Spring Return Direct Coupled Damper 205758 Hub Insert, 5/8 in. Actuator is designed to operate a damper by driving the 205820A 3-Point Mounting
Summary of the content on the page No. 5
ML6284 NON-SPRING RETURN DIRECT COUPLED DAMPER ACTUATOR Installation Installing Actuator and Mounting Bracket (Single Point Mounting) 1. Place the ML6284 Non-Spring Return Direct Coupled Damper Actuator over the damper shaft. 2. Position the actuator for best access to the actuator damper shaft locking screw. 3. Install the mounting bracket (see Fig. 2) and adjust it so the bracket tab is midway in the actuator slot. Mark the screw holes for installing the mounting bracket on the damper ho
Summary of the content on the page No. 6
12 ML6284 NON-SPRING RETURN DIRECT COUPLED DAMPER ACTUATOR RETAINING RING DETENT INSERT POSITION INDICATOR INDICATOR DETENTS HUB SLEEVE HUB INSERTS DISENGAGE BUTTON M7875 Fig. 3. Mounting hub to inside of actuator. IMPORTANT IMPORTANT The ML6284 can operate with DDC controller that Actuators driving in parallel may not be synchronized emulates an spdt break-before-make switch. Do not with each other. In normal operation, when all short-cycle the actuator. Short-cycling of the actuator actuat
Summary of the content on the page No. 7
12 ML6284 NON-SPRING RETURN DIRECT COUPLED DAMPER ACTUATOR ML6284 B BLUE MOTOR W YELLOW 2 1 TIME OUT T2 L1 RED (HOT) 24 VAC T1 L2 BLACK TAN 3 GREEN (CLOSED) ORANGE (OPEN) 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 TIME OUT FUNCTION AVAILABLE WITH ML6284D,F MODELS. M4884A 3 500 OHM POTENTIOMETER. Fig. 6. ML6284D,F typical wiring diagram. COMMON WHITE/RED 12 NO WHITE/BLUE INTERNAL NC WHITE/YELLOW AUXILIARY COMMON SWITCH BLACK/RED 82 3A, 24 VAC NO BLACK/BLU
Summary of the content on the page No. 8
ML6284 NON-SPRING RETURN DIRECT COUPLED DAMPER ACTUATOR 3. Apply 24 Vac control signal to blue (B) lead with respect to black (T1) lead (see Fig. 5). Actuator should drive ML6284D,F damper open. CONTROLLER 4. Apply 24 Vac control signal to yellow (W) lead with BLUE respect to black (T1) lead (see Fig. 5). Actuator should YELLOW drive damper closed. 1 RED 5. If 24 Vac control signal is removed, actuator should L1 (HOT) BLACK stop. L2 ML6284D,F TROUBLESHOOTING CONTROLLER BLUE Perform the fol
