Honeywell ML7421 Automobile Parts User Manual


 
PRODUCT DATA
63-2515-4
® U.S. Registered Trademark
Copyright © 2002 Honeywell • All Rights Reserved
®
ML6421, ML7421
Non-Spring Return
Electric Linear Valve Actuators
APPLICATION
The ML6421A,B Non-Spring Return Electric Linear Valve
Actuators are suitable for use with low-voltage, single-pole
double-throw (spdt), Series 60 two-position and floating
controllers. These actuators operate standard Honeywell
valves in heating, ventilating, and air conditioning (HVAC)
applications.
The ML7421A,B Non-Spring Return Electric Linear Valve
Actuators are modulating control actuators used with controls
that provide an analog output of 0 to 10 Vdc or 2 to 10 Vdc.
These actuators operate standard Honeywell valves in HVAC
applications. An internal selector plug can be used to reverse
the direction of action.
FEATURES
Quick and easy installation.
No separate linkage required.
3/4 in. (20 mm) stroke on ML6421A and ML7421A.
1-1/2 in. (38 mm) stroke on ML6421B and ML7421B.
No adjustments required.
Accurate valve positioning.
Low power consumption.
Selectable 0(2) to 10 Vdc or 0(4) to 20 mA input signal
with ML7421.
Position feedback with ML7421.
High close-off ratings.
Direct/reverse acting with ML7421.
Force-limiting end switches.
Manual operator.
Synchronous motor.
Corrosion-resistant design.
Maintenance free.
Conduit connector knockout.
Contents
Application ........................................................................ 1
Features ........................................................................... 1
Specifications ................................................................... 2
Ordering Information ........................................................ 2
Installation ........................................................................ 3
Operation .......................................................................... 6
Checkout .......................................................................... 7