ML4125, ML4135, ML8125, ML8135 FAST-ACTING, TWO-POSITION ACTUATORS
63-2567—3
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
CAUTION
Equipment Damage Hazard.
Tightly securing actuator to damper housing can
damage actuator.
Mount actuator to allow it to float along its vertical axis.
The actuators 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.
NOTE:
ML4125, ML4135, ML8125 and ML8135 Actuators
are shipped in the fully closed position.
Fig. 2. Mounting actuator to damper housing.
NOTE:
The actuator mounts flush with the damper box.
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. 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.
M17519
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.
1
1
SHAFT ADAPTER
M2064
