KMC Controls MEP-4800 User Manual
Mounting
Direct-Coupled ControlSet® Actuators (40/80 in-lb.)
MEP-4000/4800 Series
Installation Guide
THESE HOLES ARE FOR USE IN
REMOTE MOUNTING SITUATIONS—
DO NOT USE IN DIRECT COUPLED
APPLICATIONS
ADJUSTABLE
END STOP
1/4" to 5/8" (6 to 16mm)
1/4" to 7/16" (6 to 11mm)
1. Ensure the damper can move freely through its
entire range of motion, and x any binding before
installing the actuator. Turn the damper blade to
its fully closed position.
2. Press (to the right) and hold the gear
disengagement lever (see Illustration 1), rotate the
actuator to the fully closed position, and release
the lever.
NOTE: Depending on the damper-seal design,
backing the actuator o its stop
approximately 5° may provide tight
damper shut-o.
3. Align the actuator and slide it onto the shaft.
4. Leaving a gap between the actuator and
mounting surface to prevent any binding, ngertighten the nuts on the V-bolt.
5. Insert the non-rotation bracket (HMO-4002
supplied or HMO-4001 “T” bracket available
separately) into the slot at the base of the actuator.
(See Illustration 1).
6. Secure the non-rotation bracket with two (2) #8 or
#10 self-tapping screws.
7. Evenly tighten the V-bolt nuts 30–35 in-lb. on
MEP-4000s or 60–70 in-lb. on MEP-4800s.
8. If desired, use a 7/64-inch hex key wrench to
NON-ROTATION BRACKET
(HMO-4002)
loosen and position the end-stop screw.
NOTE: The two holes at the top of the actuator
are NOT for use in direct-coupled
(2)
0.200 (5mm)
applications. They are for remote
mounting, such as with the optional HLO4001 Crank Arm Kit (see the MEP-4000/4800
Series Data Sheet).
REMOVEABLE CONDUIT FITTING
Illustration 1—Overview
(Direct-Coupled Mounting)
MEP-4000/4800 Series 1 Installation Guide
WITH 1/2" NPS THREADED HOLE
GEAR
DISENGAGEMENT
LEVER
MOUNTING
SURFACE
Wiring
NOTE: Before January 2014, MEP-40x2/48x2
models had 0–10 VDC inputs. They now
have 2–10 VDC inputs. When replacing
an older 0–10 VDC actuator with a 2–10
VDC actuator, congure the connected
controller or thermostat output to match.
See the model number on the actuator label and the
relevant wiring illustration (2 through 5).
MEP-4003 Only
NOTE: The MEP-4003’s terminals are not enclosed
inside the case as the other models are.
1. Route the cable through the strain relief molded
in the lower left of the case. (See Illustration 2.)
2. Connect the wires to the terminal block.
feedback voltage as needed. See Illustration 5 and
Direction, Feedback, and Auto-Mapping (MEP4xx2) on page 3.
8. For MEP-4xx1/4x13s, adjust rotation direction
switch if needed (see Illustration 3 and 4).
9. Reinstall the tethered cover and tighten the screw.
Switch Position:
1 = Rotation is
Direct
0 = Rotation is
Reversed
–
Power
Supply
~
Illustration 3—MEP-4xx1/4x13 TRI-STATE Wiring
CW
Feedback Potentiometer
COM
CCW
(MEP-4x13 Only)
Strain Relief
Power
–
Supply
~
Illustration 2—MEP-4003 (Only) Wiring
All Except MEP-4003
1. Loosen the screw on the tethered access cover and
remove the cover.
2. Slide the conduit ing plate out.
3. Using a utility knife or drill, cut the red plug
to accept wiring or replace the plug with an
application-specic ing.
NOTE: The red plug (or similar ing) protects
internal components from debris, helping to
ensure long actuator life.
4. Thread wires through the plugged opening and
connect to the terminal block. (See Illustrations 3
through 5.)
NOTE: For your convenience, the wiring terminal
block is removable.
Switch Position:
1 = Rotation is
Direct
0 = Rotation is
Reversed
Power
–
Supply
~
Contact Position: Open = CW Rotation, Closed = CCW Rotation
Illustration 4—MEP-4xx1/4x13 2-POSITION (3-Wire) Wiring
CW
Feedback Potentiometer
COM
CCW
(MEP-4x13 Only)
5. Connect and adjust the auxiliary switch if
required (MEP-4x2x only). See Auxiliary Switch
(4x2x) on page 4.
6. Reinstall the terminal block on the pins (if
removed) and the conduit ing plate.
7. For MEP-4xx2 (proportional) models, adjust the
auto-mapping range reset, rotation direction, and
MEP-4000/4800 Series 2 Installation Guide
Power
~
–
Supply
Control Signal
2–10 VDC
Illustration 5—MEP-4xx2 Proportional Wiring
–
+
+
Feedback Output
–
1–5 or 2–10 VDC
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