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Honeywell ML7284, Product Data, Page: 3 / 8

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Honeywell ML7284 Product Data Download Page 3

ML7284 NON-SPRING RETURN DIRECT COUPLED DAMPER ACTUATOR

63-2504—2

3

Fig. 1. Approximate dimensions of ML7284 Non-Spring Return Direct Coupled

Damper Actuator and mounting bracket in in. (mm).

9/32 (7)
3 PLACES

1-17/32
(39)

3-3/32 (79)

4 (102)

7/16 (11)

1-1/4
(32)

7-11/16
(196)

8-7/16
(215)

36 
(914)

1/2 
(12)

5/8 (17)

13/32 (10)

1/2
(13)

3/4
(19)

7/8 (22) 1 (25)

3-5/32 
(80)

1/2 (13)

1/2 (13)

1-11/16 (43)

2-1/2 (63)

3-5/16 (84)

4-1/2 (114)

5 (127)

6 (152)

1/4 (6)

1

1    REMOVABLE RETAINING RING FOR
      REMOVAL OF HUB SLEEVE

M7618B

1/4 (6)

1/8 (3)

2 
(51)

15/16
(24)

1-29/32
(48)

Summary of Contents for ML7284

Page 1: ... 90 low leakage dampers Manual clutch allows for manual adjustment 92 second synchronous timing can eliminate need for feedback position indication in closed loop tempera ture control applications Removable splined output hub permits premounting of hub on damper shaft providing installation flexibility Includes standard reverse direct acting rotation switch on the outside cover Designed for both s...

Page 2: ...torage Temperature 30 F to 150 F 40 C to 65 C Humidity 5 to 95 percent relative humidity noncondensing Mounting Mounts directly on 3 8 in to 3 4 in 12 to 19 mm round or square damper shaft Minimum shaft length required 2 5 in 64 mm when the shaft attachment is made on the side of the actuator opposite the duct 0 65 in 16 mm when the hub is mounted on the shaft before the actuator is installed Most...

Page 3: ...tor and mounting bracket in in mm 9 32 7 3 PLACES 1 17 32 39 3 3 32 79 4 102 7 16 11 1 1 4 32 7 11 16 196 8 7 16 215 36 914 1 2 12 5 8 17 13 32 10 1 2 13 3 4 19 7 8 22 1 25 3 5 32 80 1 2 13 1 2 13 1 11 16 43 2 1 2 63 3 5 16 84 4 1 2 114 5 127 6 152 1 4 6 1 1 REMOVABLE RETAINING RING FOR REMOVAL OF HUB SLEEVE M7618B 1 4 6 1 8 3 2 51 15 16 24 1 29 32 48 ...

Page 4: ...ion The ML7284 Non Spring Return Direct Coupled Damper Actuator is designed with removable hub inserts to accommodate specific damper shaft sizes Proper insert selection is necessary to avoid excessive strain on the output gear Most ML7284 Actuators are shipped with a 1 2 in hub insert For field use three hub insert sizes are available See the Accessories listing in the Specifications section Shaf...

Page 5: ...cket on the damper housing 4 Remove the mounting bracket and actuator 5 Drill or center punch the starting holes for the mounting bracket screws or use no 10 self tapping sheet metal screws not provided 6 Place the actuator and mounting bracket back into position over the damper shaft and install the mounting bracket screws 7 Move damper shaft either fully cw or ccw 8 Fully depress and hold diseng...

Page 6: ...R SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED PROPORTIONING CONTROLLER PROPORTIONING CONTROLLER BROWN WHITE BROWN WHITE FEEDBACK INPUT FEEDBACK INPUT Fig 7 Common transformer with two controller outputs and two actuators M7621A MOUNTING BRACKET TO JUNCTION BOX UP TO 3 FT AWAY 30 30 0 60 60 90 12 1 2 REVERSE DIRECT Fig 4 ML7284 Actuator typical mechanical connection M7623A M...

Page 7: ...pdt auxiliary switches that are factory set to make common to normally open at 12 and 82 rotation from the closed counter clockwise stop See Fig 6 OPERATION The ML7284 Non Spring Return Direct Coupled Damper Actuator is designed to be used in ventilating and air condi tioning installations to operate dampers ventilation flaps and louvers requiring up to 150 lb in torque The ML7284 Non Spring Retur...

Page 8: ...eywell Inc 1985 Douglas Drive North Golden Valley MN 55422 TROUBLESHOOTING If the actuator does not operate properly during the checkout perform the following troubleshooting steps Perform these steps before replacing the actuator 1 Check actuator label to verify proper power and control signal requirements for the application 2 Check for presence of 24 Vac at the black T1 and red T2 leads when th...

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