MS4104, MS4109, MS4604, MS4609, MS8104, MS8109 FAST-ACTING, TWO-POSITION ACTUATORS
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 min-
imum 100 lb-in., maximum 130 lb-in. torque. Use
1/4 in. wrench (see Specifications for details) to tighten
set screws.
Wiring
See Fig. 3 through 5 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 must corre-
spond with the characteristics of power supply and
actuator.
3. Use wires rated for at least 75°C (167°F).
4. The conduit fittings are designed for use with 3/8 in.
reduced-wall steel or aluminum flexible conduit.
L2 ( )
24 VAC
L1 ( )
7° AUXILIARY
SWITCH
85° AUXILIARY
SWITCH
Fig. 3. Typical 24 Vac wiring.
L2 ( )
120 VAC
L1 ( )
7° AUXILIARY
SWITCH
85° AUXILIARY
SWITCH
Fig. 4. Typical 120 Vac wiring.
L2 ( )
230 VAC
L1 ( )
7° AUXILIARY
SWITCH
85° AUXILIARY
SWITCH
Fig. 5. Typical 230 Vac wiring.
5
BLACK
RED
BLUE
BLUE
YELLOW
YELLOW
M34624
WHITE
BLACK
GREEN
BLUE
BLUE
YELLOW
YELLOW
M34625
BLUE
BROWN
GREEN
BLUE
BLUE
YELLOW
YELLOW
M34626
63-2740—02
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