ML6420A/ML6425A,B
5Pages

FEATURES Quick and easy installation No separate linkage required No adjustments Low power consumption Force-limiting end switches Spring-return models Manual operator Models for low and line voltage Synchronous motor Corrosion-resistant design Maintenance-free Actuator-valve combinations approved according to DIN 14597 available SPECIFICATIONS Temperature Limits Ambient operating limits -10...+50 °C at 5...95% RH APPLICATION The ML6420A / ML6425A,B actuators enable floating control, and are suitable for use in conjunction with ON/OFF or floating single-pole, double-throw (SPDT) control outputs. They can operate Honeywell's standard valves in heating, ventilation, and air conditioning (HVAC) applications. Ambient storage limits Medium valve temperature Protection Protection standard Insulation -40...+70 °C at 5...95% RH see section "Models" on pg. 2; 220 °C with High-Temperature Kit (see section "Accessories" on pg. 5) IP54 per DIN 40050 Class II per DIN EN60730 Flame retardant as per UL 94-V0 (with metal cable gland - not supplied) Operating mode Wiring Wiring terminals 1.5 mm2 Cable entry M20x1.5 and two additional Weight Non-spring return type Spring return type Material Cover Base Yoke 1.3 kg 2.4 kg ABS-FR glass fiber reinforced plastic aluminum diecast ® U.S. Registered Trademark Copyright © 2014 Honeywell Inc. • All rights reserved

* When equipped with the High-Temp. Kit (see section "High-Temperature Kit" on pg. 5), all actuators are suitable for medium valve temperatures of up to 220 °C. **Depending upon the given combination of valves and actuators, see tables below. Medium temp. < 130 °C (DIN Certificate 1F139/13) Medium temp. < 150 °C (not DIN-certified) OPERATION General The drive of a synchronous motor is converted into linear motion of the actuator stem by using a spur gear transmission. The actuator stem is connected with the valve stem by a button keyed retainer connection. An integrated spring package...

For details on the valves, see following Specification Data No.: V5011R EN0B-0064GE51

ML6420A without spring return 24 V ~ safety temp. limiter 4 5 ML6425A,B with spring return ML6420A without spring return ML6425A,B with spring return safety temp. limiter

ACCESSORIES Auxiliary Switches The actuators can be equipped on site with an auxiliary switch unit consisting of two switches. Their switching points are adjustable over the full length of the actuator stroke. The switches can be used to switch pumps or provide remote indication of any stroke position. A cable gland M20x1.5 is delivered with the unit. (for applications >150 °C and < 220 °C medium temperature) Auxiliary Potentiometers Auxiliary potentiometers are available for mounting on site. They can be used as feedback potentiometer and/or to provide remote indication of the valve...