ML6174, ML7174 Non-Spring Return
ML6174
APPLICATION
The ML6174 and ML7174 are non-spring return direct
coupled actuators (DCA) used to control dampers in
applications such as variable air volume (VAV) terminal units.
Suitable for use with single pole double throw (spdt) floating
thermostats and electronic systems.
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Copyright © 1997 Honeywell Inc. • All Rights Reserved
Direct Coupled Actuators
FEATURES
• Damper shaft direct mount.
• 70 lb-in. torque.
• 45
(cw) or counterclockwise (ccw) directions.
• 90-second timing models suitable for use with
pressure-independent VAV systems.
• Seven-minute timing models suitable for use with
pressure-dependent VAV systems.
• Magnetic coupling provides 130 lb-in. (or less) stall
torque, eliminating the need for mechanical stops or
limit switch adjustments.
ML7174
• Two field-addable auxiliary switches.
• Auxiliary feedback potentiometer field-addable on
some models.
°
• 0
direction) on some models.
• Manual declutch on all models.
• W7620 Terminal Unit Controller compatibility.
• 2 to 10 Vdc or 4 to 20 mA control input for ML7174.
• Commercial Zone Damper in W7600 Commercial Zone
System compatibility.
• UL94-5V rated.
Application .......................................................................... 1
Features .............................................................................. 1
Specifications ...................................................................... 2
Installation ........................................................................... 5
Operation ............................................................................ 9
Checkout ............................................................................. 11
°
°
°
, 60
, and 90
selectable stroke in either clockwise
°
to 30
minimum position adjustment (cw or ccw
PRODUCT DATA
Contents
63-2534-1