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ML4105, ML4115, ML8105, ML8115 FAST-ACTING, TWO-POSITION ACTUATORS
63-2540—9 4
INSTALLATION
When Installing this Product...
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a hazardous
condition.
2. Check the ratings given in the instructions and on the
product to make sure the product is suitable for your
application.
3. Installer must be a trained, experienced service
technician.
4. After installation is complete, check out product
operation as provided in these instructions.
IMPORTANT
All wiring must agree with applicable codes,
ordinances and regulations.
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.
Location and Mounting
The ML4105, ML4115, ML8105 and ML8115 DCA are
designed to open a damper by driving the damper shaft in
either clockwise or counterclockwise direction.
The actuator housing has two slots on the bottom that, with a
205649 Mounting Bracket, secure it flush to a damper box
(see Fig. 2). When mounted correctly, these slots allow the
actuator to float without rotating relative to the damper shaft.
CAUTION
Equipment Damage Hazard.
Tightly securing actuator to damper housing can
damage actuator.
Mount actuator to allow it to float along its vertical axis.
NOTE: ML4105, ML4115, ML8105, and ML8115 Actuators
are shipped in the fully closed position.
Fig. 2. Mounting actuator to damper housing.
Preparation
Before mounting the actuator onto the damper shaft,
determine the damper shaft size (3/8 in. to 1/2 in.
[10 mm to 13 mm]).
If damper shaft is 3/8 in. (10 mm) round or square, use part
number 201391 Shaft Adapter (not supplied with actuator).
Place adapter opposite set screws (see Fig. 3).
NOTE: The damper shaft adapter centers a 3/8 in. (10 mm)
damper shaft in the hub. Failure to use adapter can
cause mounting screws to loosen. A 1/2 in. (13 mm)
damper shaft does not require an adapter.
Fig. 3. Using damper shaft adapter for
3/8 in. (10 mm) damper shafts.
M13054A
ENSURE THAT MOUNTING ASSEMBLY PREVENTS ACTUATOR
ROTATION AND ALLOWS ACTUATOR TO FLOAT ALONG
INDICATED AXIS. WHEN TOO TIGHT, THE RESULTING BINDING
CAN DAMAGE THE ACTUATOR OR REDUCE TORQUE OUTPUT.
ACCESSORY MOUNTING BRACKET IS NOT SUPPLIED WITH
THE ACTUATOR.
1
1
2
2
SHAFT ADAPTER
M2064