Install Instructions

ManualsBrandsHoneywell ManualsDampersLinear-Stroke Valve Actuator 405 lbf

Table Of Contents

PRODUCT DATA

63-2533-03

ML6420, ML7420

Non-Spring Return

Electric Linear Valve Actuators

APPLICATION

The ML6420 Non-Spring Return Electric Linear Valve

Actuators are floating control actuators used with controllers

that provide a switched or floating single-pole double-throw

(spdt) output. These actuators operate standard Honeywell

valves in heating, ventilating, and air conditioning (HVAC)

applications.

The ML7420 Non-Spring Return Electric Linear Valve

Actuators are modulating control actuators used with

controllers 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.

• Conduit connector is standard.

• No adjustments required.

• Low power consumption.

• High close-off ratings.

• Force-limiting end switches.

• Manual operator.

• Synchronous motor.

• Corrosion resistant design.

• Maintenance free.

• Direct/reverse acting with ML7420.

• Position feedback signal included with ML7420.

• Selectable 0 to 10 Vdc or 2 to 10 Vdc signal input with

ML7420.

Contents

Application ........................................................................ 1

Installation ........................................................................ 3

Ordering Information ........................................................ 2

Operation .......................................................................... 7

Checkout .......................................................................... 8

Summary of content (8 pages)

PAGE 1
ML6420, ML7420 Non-Spring Return Electric Linear Valve Actuators PRODUCT DATA FEATURES • Quick and easy installation. • No separate linkage required. • Conduit connector is standard. • No adjustments required. • Low power consumption. • High close-off ratings. • Force-limiting end switches. • Manual operator. • Synchronous motor. • Corrosion resistant design.
PAGE 2
ML6420, ML7420 NON-SPRING RETURN ELECTRIC LINEAR VALVE ACTUATORS SPECIFICATIONS B and 24 Vac: Drives valve stem down. W and 24 Vac: Draws valve stem up. ML7420: 0 to 10 Vdc or 2 to 10 Vdc. Models: Model Run Time in sec at 60 Hz ML6420A 30 or ML7420A a 60a Stroke in in. (mm) 3/4 (20) Description Actuator Material: Cover: ABS-FR plastic. Base: PBTP-FR plastic. Yoke: Diecast aluminum. Electric Linear Valve Actuator Dependant on actuator model. Dimensions: See Fig. 1. Actuator Stroke: 3/4 in.
PAGE 3
ML6420, ML7420 NON-SPRING RETURN ELECTRIC LINEAR VALVE ACTUATORS Table 1. Close-off ratings for ML6420, ML7420 Electric Linear Valve Actuators and Honeywell Valves (psi). Type Flange NPT Valve 1/2 in. 3/4 in. 1 in. 1-1/4 in. 1-1/2 in. 2 in. 2-1/2 in. 3 in.
PAGE 4
ML6420, ML7420 NON-SPRING RETURN ELECTRIC LINEAR VALVE ACTUATORS All wiring must comply with local electrical codes, ordinances and regulations. Voltage and frequency of the transformer used with the actuator must correspond with the power supply and actuator characteristics. See Fig. 6 through 11 for typical wiring hookups. 1. Feed power and control wires through the conduit connector located on the bottom of the actuator case. See Fig. 5. CAUTION Equipment Damage Hazard.
PAGE 5
ML6420, ML7420 NON-SPRING RETURN ELECTRIC LINEAR VALVE ACTUATORS ML7420 WIRING STRIP ML7420 2 F F + – + 1 2 3 4 5 6 1 L1 (HOT) L2 F 3 – SENSOR WIRING STRIP INPUT (FEEDBACK) OUTPUT + – T2 T1 T2 O1 3 2 DUAL TRANSFORMERS 1 T1 O2 O1 1 500 OHM RESISTOR T775 (WITH 4-20 MA OUTPUT) O2 L1 (HOT) L2 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 2-10 Vdc FEEDBACK SIGNAL. SEE OUTPUT SIGNAL FEEDBACK SECTION. 3 0-10 Vdc OR 2-10 Vdc CONTROL SIGNAL.
PAGE 6
ML6420, ML7420 NON-SPRING RETURN ELECTRIC LINEAR VALVE ACTUATORS M17428 Fig. 13. Replacing actuator cover.
PAGE 7
ML6420, ML7420 NON-SPRING RETURN ELECTRIC LINEAR VALVE ACTUATORS Auxiliary Potentiometers The 43191679 Auxiliary Potentiometers can be used as feedback potentiometers and to provide remote indication of valve position. See the Installation Instructions packed with the potentiometers. Auxiliary Switches The 43191680 Dual Auxiliary Switch can be used on both the ML6420 and ML7420 Electric Linear Valve Actuators.
PAGE 8
ML6420, ML7420 NON-SPRING RETURN ELECTRIC LINEAR VALVE ACTUATORS Direction of Action (ML7420/25 only) The direction of the actuator action can be changed using the pushbutton and LED, which is factory set so that the actuator drives the valve stem down on increasing signal and draws the valve stem up on decreasing signal. With the valve stem up, the output signal from the feedback (F) function is either 0 or 2 Vdc. The output of the signal does not change when W3 is used to reverse the actuator action.