ML6174, ML7174 NON-SPRING RETURN DIRECT COUPLED ACTUATORS
63-2534—1
6
Fig. 4. Using damper shaft adapter for 3/8 in.
damper shafts.
Manual Operation (Declutch)
CAUTION
Personal Injury and Product Damage Hazard.
Do not use manual declutch without supporting
the load.
Support load independent of actuator immediately
prior to and while using manual declutch lever.
Use the manual declutch lever to manually adjust the actuator
setting. Fig. 5 shows the location of the manual declutch
lever. To operate, push the lever in the direction of the arrow
on the lever cover.
SHAFT ADAPTER
M2064
M10076A
MANUAL
DECLUTCH
LEVER
60
°
60
°
Fig. 5. Location of manual declutch lever.
Installation
After determining the direction of the damper shaft rotation
(cw or ccw), proceed as follows:
1.
Place the actuator onto the damper shaft.
2.
If the angle of the damper opening is 60
°
, close the
actuator using the manual declutch:
a.
Disengage the hub using the declutch lever; see
Manual Operation (Declutch) section.
b.
Rotate the hub until the actuator gear train
passes the 60
°
setting. (Do not insert the pin until
the actuator has passed this point.)
c.
Release the declutch lever.
NOTE:
Dampers with 90
°
stroke do not require the
range stop pin.
3.
Insert the range stop pin into the appropriate (cw or
ccw) 60
°
slot. The range stop pin is clipped into its final
position only after the pin passes through both actuator
plates (see Fig. 6). The range stop pin should
snap
into
position and not be removable by hand (see Fig. 7).
4.
With the actuator placed in its final position, secure the
mounting tab to the damper box with a sheet metal
screw.
CAUTION
Equipment Damage Hazard.
Tightly securing mounting tab to damper housing
can damage actuator.
Do not fully tighten the screw, when mounting, to
allow the actuator to float.
5.
Position the damper in the open position and tighten
the Allen screws securely into the damper shaft.
6.
If the angle of the damper opening is 45
°
, close the
actuator using the manual declutch.
a.
Disengage the hub using the declutch lever; see
Manual Operation (Declutch) section.
b.
Rotate the hub until the actuator gear train
passes the 45
°
setting. (Do not insert the pin until
the actuator has passed this point.)
c.
Release the declutch lever.
7.
Insert the range stop pin into the appropriate (cw or
ccw) 45
°
slot. The range stop pin is clipped into its final
position only after the pin passes through both actuator
plates (see Fig. 6). The range stop pin should
snap
into
position and not be removable by hand (see Fig. 7).
CAUTION
Equipment Damage Hazard.
Using incorrect range stop can damage light duty
dampers.
Be sure to select the correct range stop.
Minimum Position Setscrew
Certain ML6174 and all ML7174 models are equipped with
two tapped holes located in the plastic housing at the top of
the actuator. These holes can be used with the minimum
position setscrew and locknut inside the 4074ENJ Bag
Assembly (see Fig. 8). The setscrew provides for a 0
°
to 30
°
minimum position adjustment.
NOTE:
Before starting operation, note that the 1/4 in.
minimum position setscrew limits closing motion,
while the range stop pin limits opening motion.
1.
Determine the direction of the desired closing rotation.
2.
Move the actuator to the position fully opposite of the
desired closing rotation (if cw closing rotation is
desired, move the actuator to the full ccw position).
3.
Establish the correct hole for the setscrew using Fig. 8
and the results of step 1.
4.
Remove the red cap from the desired hole. Leave the
other cap in position. The caps ensure that dust and
other impurities do not enter the gear train through
unused holes.
