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Installation
CAUTION
Device Malfunction Hazard.
Improper set screw tightening causes device
malfunction.
Tighten set screws with proper torque to prevent
damper shaft slippage.
CAUTION
Actuator Damage Hazard.
Using actuator as shaft bearing causes device
damage.
Use actuator only to supply rotational torque. Avoid
any side loads to actuator output coupling bearings.
To install actuator, proceed as follows:
1. Place actuator over damper shaft; and hold mounting
bracket in place. See Fig. 2.
2. Mark screw holes on damper housing.
3. Remove actuator and mounting bracket.
4. Drill or center-punch holes for mounting screws (or use
no.10 self-tapping sheet metal screws).
5. Turn damper blades to desired normal (closed) position.
6. Place actuator and mounting bracket back into position
and secure bracket to damper box with sheet metal
screws.
7. Tighten set screws securely into damper shaft using
minimum 30 lb-in., maximum 60 lb-in. torque. Use
1/8 in. or 3 mm Allen wrench (see Specifications for
details) to tighten set screws.
Wiring
See Fig. 4 through 8 for typical wiring diagrams.
WARNING
Electrical Power Hazard.
Line voltage can cause death or serious injury and
short equipment circuitry.
Disconnect power supply before installation.
CAUTION
Electrical Shock or Equipment Damage Hazard.
Low voltage can shock individuals or short
equipment circuitry.
Disconnect power supply before installation.
IMPORTANT
1. All wiring must comply with local electrical codes,
ordinances and regulations.
2. Voltage and frequency of transformer used with
ML8105 and ML8115 must correspond with the
characteristics of power supply and actuator.
3. Use wires rated for at least 75°C (167°F).
ML4105, ML4115, ML8105, ML8115 FAST-ACTING, TWO-POSITION ACTUATORS
L1
L2
M17585A
Fig. 8. 230 Vac terminal-strip wiring with a thermal fuse.
NOTE: Terminal strip included with ML4105C1008 and
5
( )
24 VAC
( )
Fig. 4. Typical 24 Vac wiring.
( )
L1
120 VAC
( )
L2
M17589A
Fig. 5. Typical 120 Vac wiring.
( )
L1
230 VAC
( )
L2
M17588A
Fig. 6. Typical 230 Vac wiring.
( )
L2
230 VAC
( )
L1
M17586A
Fig. 7. 230 Vac terminal-strip wiring.
( )
L1
230 VAC
( )
L2
M17587A
ML4105D1007.
RED
BLACK
BLACK
WHITE
BROWN
BLUE
2
3
1
L1
200 F
93 C
2
3
1
L1
63-2540—9
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