KMC Controls MEP-455 User Manual

ControlSet® MEP-455 Series Spring Return
Rotary Electronic Damper Actuator

a. Actuator

b. Self-centering shaft

adapter

c. Position indicator

d. Shaft adapter

h

locking clip

a

EA0322R2

b

d

e

c

Figure 1. Parts of the MEP-455 Actuator.

g

f

Installation Instructions

Document No. 129-361

August 3, 2004

e. Position indicator

adapter

f. Mounting bracket

g. Mounting screws

h. 3 mm hex wrench

Product Description

These installation instructions describe the steps for
direct-coupled mounting of the ControlSet MEP-455
Spring Return Electronic Damper Actuators.

Product Numbers

MEP-455xxx

Warning/Caution Notations

WARNING:

CAUTION:

Personal injury or loss of life
may occur if you do not
perform a procedure as
specified.
Equipment damage or loss of
data may occur if you do not
follow a procedure as
specified.

Required Tools

• 10 mm (13/32-inch) open end wrench

• Drill

• 4 mm (5/32-inch) drill bit

• 3 mm hex wrench (provided)

• Phillips screwdriver

• Marker or pencil

Mounting Positions

NEMA 2

˚

<

90

˚

EA0692R1

Figure 2. Acceptable NEMA 2 Positions.

˚

90

<

90

Prerequisites

NOTE: The actuator is shipped from the factory with

5° preload. When power is applied to the
actuator, the preload is released.

To manually release the preload, insert the 3 mm
hex key in the override opening and turn the key in
the direction of the arrow. See Manual Override.

WARNING:

Do not open the actuator.

Expected Installation Time

30 minutes

Item Number 129-361-02, Rev. 011 Page 1 of 7

Document No. 129-361
Installation Instructions
August 3, 2004

Installation

1

3

>

77 mm

>3 in

>20 mm
>3/4 in

<

77 mm

<3 in

90°

2

EA0327R1

2

Figure 3. Actuator Mounting Orientation.

d

5

b

4

a

ADAPTER

d

ALIGNMENT

5

b

4

a

6

e

SHAFT

MARK

90°

c

c

c

c

6

6

90

c

c

7

7

Page 2 of 7

EA0370R2

Figure 4. Shaft Length and Proper Shaft Adapter Location.

NOTE: Place the shaft adapter right next to the alignment mark keeping the mark visible.

Document No. 129-361

Installation Instructions

August 3, 2004

1

OR

4

3

2

3

4

EA0288R1

Figure 5. With the Damper Blades in the Desired "0" Position, Place the Actuator on the Shaft.

1/2

1/2

5

f

EA0357R2

EA0289R1

4 mm

5/32 in.

2 PLACES

g

6

Figure 6. Fasten the Mounting Bracket.

77

10 mm

13/32 in.

Apply 7.5 lb-ft

(10 Nm) torque

maximum

EA0359R2

Figure 7. Fasten the Shaft Adapter to the Damper Shaft.

Page 3 of 7

.

10 mm

13/32 in.