ML6174, ML7174 NON-SPRING RETURN DIRECT COUPLED ACTUATORS
63-2534—1
8
All wiring must comply with local electrical codes, ordinances
and regulations. Voltage and frequency of the transformer
used with the ML6174 must correspond with the
characteristics of the power supply and of the actuator. Screw
terminals are provided for easy hookup. See Fig. 10, 11 and
13-17 for typical wiring hookups.
Connecting Wiring to Conduit Cover Actuators
(Fig. 9)
1.
Remove the cover from the actuator by lifting the top
and pivoting the cover to the rear of the actuator.
2.
Remove the conduit knockouts with a flat-bladed
screwdriver. Discard the knockouts.
3.
Install the conduit connector.
4.
Run the connecting wire through the conduit connector,
strip the wire ends (if necessary) and connect to the
CW, COM and CCW terminals using Fig. 10, 11 or the
control manufacturer instructions.
COVER
M10075
CONDUIT
KNOCKOUTS
Fig. 9. Conduit cover for ML6174/ML7174 DCA.
Fig. 10. ML6174 used with T87F in heating or cooling application.
Fig. 11. ML6174 used with T87F in heating and cooling application.
5.
Apply power to the actuator.
6.
After operational checkout, replace the cover by
reversing the procedure in step 1.
Auxiliary Switches
The 201052A or B Auxiliary Switch is used with the ML6174/
ML7174 DCA. It allows for control of equipment external to
the actuator (for example, electric reheat coils and fan) at an
adjustable point in the actuator stroke (0
°
to 90
°
).
The 201052 Auxiliary Switches are field-addable. For
installation instructions, see form 63-2218.
Auxiliary Potentiometers
The 200976A,C Auxiliary Potentiometers mount on the face
of the ML6174A,C (as shown in Fig. 12). The potentiometer
shaft has a slipping collar. If one of the two limits of the
potentiometer is exceeded, the collar continues to rotate,
causing no damage to the potentiometer itself. To mount the
potentiometer on the actuator:
1.
Turn the potentiometer to align the shaft key with the
slot in the potentiometer drive.
2.
Tilt the potentiometer slightly so the key faces down
toward the slot.
3.
Insert the potentiometer into the slot, and push down so
the potentiometer is flush with the actuator body and
the bracket is aligned over the screw hole.
4.
Insert the provided screw into the hole and fasten
securely.
IMPORTANT
Remove the range stop pins and minimum position
setscrews prior to calibration.
M10248
EXTERNAL
SWITCH
R
W
Y
T87F
R8222
#1
#2
#3
RED COM
BLUE CW
WHITE CCW
L1
(HOT)
L2
1
1
2
2
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
AUXILIARY SWITCHES ARE REQUIRED TO TURN
OFF THE MOTOR AT EACH END OF THE STROKE.
ML6174
M10249
R
W
Y
T87F
R8222
#1
#2
#3
RED COM
BLUE CW
WHITE CCW
L1
(HOT)
L2
1
ML6174
1
2
2
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
AUXILIARY SWITCHES ARE REQUIRED TO TURN
OFF THE MOTOR AT EACH END OF THE STROKE.
