ML6174, ML7174 NON-SPRING RETURN DIRECT COUPLED ACTUATORS
63-2534—1
10
1
1
2
3
3
2
R
C
Y
W
T641A THERMOSTAT
1K
120
VAC
SYSTEM
TRANSFORMER
24 VAC
CCW
CW
PHASE SHIFT CAP
DRIVE
CCW
WINDING
DRIVE
CW
WINDING
COM
ML6174 ACTUATOR
COMMON
USE NC CONTACT OF AUXILIARY SWITCH (PIN 201052A).
CONTACT OPENS WHEN ACTUATOR DRIVES CLOSED (CCW)
TO CAM SETTING POSITION.
USE SPDT RELAY OUTPUTS FROM FIRE AND ALARM
SYSTEM, OR OVERRIDE SYSTEM, AS DRAWN. THIS
OVERRIDES MINIMUM POSITION LIMITATION, AND
DRIVES ACTUATOR FULLY CCW.
AS DRAWN, ACTUATOR OPENS DAMPER TO CW ROTATION.
TO OPEN DAMPER TO CCW, REVERSE CCW AND CW
CONNECTIONS AT ACTUATOR. THIS ALSO CAUSES
ALARM CONDITION TO DRIVE ACTUATOR TO FULLY CW.
M10253B
Fig. 13. Minimum position set with auxiliary switch
contacts, override provided by fire and alarm contacts.
1
1
R
C
Y
W
T641A,C THERMOSTAT
120
VAC
SYSTEM
TRANSFORMER
24
VAC
CCW
CW
PHASE SHIFT CAP.
DRIVE
CCW
WINDING
DRIVE
CW
WINDING
COM
COMMON
AS SHOWN, T641 MAKES R-Y CONTACTS TO DRIVE
ML6174 ACTUATOR CCW, AND MAKES R-W CONTACTS
TO DRIVE ML6174 ACTUATOR CW.
M12574
ML6174
ACTUATOR
Fig. 14. T641A,C controlling ML6174.
ML7174 Actuators
Voltage input (2 to 10 Vdc)
Wire the (+Vdc) and (-) terminals of each actuator in parallel.
Make certain the total connected load does not exceed the
current capacity of the input signal source.
1
1
2
2
L1
(HOT)
24 VAC
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION, AS REQUIRED.
T6984A SHOWN WIRED FOR COOLING ONLY. TO WIRE FOR
HEATING ONLY, REVERSE OPEN AND CLOSE CONTACTS.
M12575
ML6174
CW
COM
CCW
L2
COMMON
24 VAC
MOTOR CLOSE
MOTOR OPEN
T6984A
Fig. 15. T6984A controlling ML6174 for cooling or
heating application.
1
1
R
C
Y
W
T641A,C THERMOSTAT
L1
(HOT)
24 VAC
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION, AS REQUIRED. ENSURE THAT
EQUIPMENT TRANSFORMER IS CORRECTLY SIZED.
M12576
ML6174
CW
COM
CCW
ML6174
CW
COM
CCW
ML6174
CW
COM
CCW
L2
Fig. 16. Parallel ML6174 actuators from an
spdt controller.
