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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
Explosion Hazard.
A spark from the actuator or attached accessories
can result in serious injury or death.
Install the actuator in areas free of escaping gas and
other explosive vapors.
CAUTION
Electrical Shock or Equipment Damage Hazard.
Can shock individuals or short equipment
circuitry.
Disconnect all power supplies before installation.
Actuators with auxiliary switches can have more than
one disconnect.
CAUTION
Actuator Damage Hazard.
Deteriorating vapors and acid fumes can damage
the actuator metal parts.
Install actuator in areas free of acid fumes and
deteriorating vapors.
Location
Choose a location for the actuator that allows enough
clearance for mounting accessories and for servicing.
Mounting
These actuators are designed to open a damper or valve by
driving the shaft in either the clockwise (cw)
counterclockwise (ccw)
mounting tab on the bottom that secures it to a damper box
or valve linkage. When mounted correctly, this tab allows the
actuator to float without rotating relative to the shaft. The tab
is sized for 1/4 in. screw or pin (not included).
CAUTION
Equipment Damage Hazard.
Tightly securing mounting tab to damper housing
can damage actuator.
Once mounted, the actuator must be allowed to float;
do not fully tighten the screw.
35 AND 70 LB-IN. NON-SPRING RETURN DIRECT COUPLED ACTUATORS
or
direction. The actuator has a
These actuators are shipped in the fully clockwise 90° position
as viewed from the end of the damper shaft.
CAUTION
Equipment Damage Hazard.
Mounting actuator unevenly with damper housing
can damage actuator.
Mount actuator flush with damper housing or add
spacer between mounting tab and damper box
housing (see Fig. 2).
ADD SPACER BETWEEN
DAMPER BOX AND TAB
Fig. 2. Mounting actuator to VAV box when
actuator is not flush with box.
Preparation
Before mounting the actuator onto the shaft, determine the
following:
1. Size of the shaft (3/8 in. to 1/2 in.).
2. Direction the shaft rotates to open the device (cw or
ccw). See Fig. 4.
3. Degrees of actuator stroke for opening device (45°, 60°,
or 90°).
If the shaft is 3/8 in. round or square, use part number 201391
Shaft Adapter provided inside the bag assembly shipped with
the actuator. Place the adapter opposite the setscrews (see
Fig. 3).
SHAFT ADAPTER
Fig. 3. Using shaft adapter for 3/8 in. shafts.
5
DAMPER
SHAFT
ML6161
ML6174
VAV BOX HOUSING
M11624A
M2064
63-2209—8
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