Honeywell ML7420, ML6420 User Manual

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.

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.

• 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

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ML6420, ML7420 NON-SPRING RETURN ELECTRIC LINEAR VALVE ACTUATORS

SPECIFICATIONS

Models:

Run Time in

Model

ML6420A

ML7420A

Dependant on actuator model.

Dimensions: See Fig. 1.

Weight: 2.9 lb (1.3 kg).

Electrical Ratings:

Power Input: 24 Vac ±15%, 60 Hz. Power Consumption:

ML6420: 6 VA maximum at 24 Vac.

ML7420: 7 VA maximum at 24 Vac. Signal Source Output Resistance: 1K ohm maximum. Signal Load: 1 mA maximum.

Ambient Ratings:

Temperature:

Ambient: 14°F to 122°F (-10°C to +50°C).

Storage: -40°F to +158°F (-40°C to +70°C).

Maximum Valve Medium: 300°F (150°C). Humidity: 5 to 95 percent relative humidity, noncondensing.

Stem Force: 135 lbf (600N).

Signal Inputs (Supply Voltage Between Terminals):

ML6420:

sec at 60 Hz

30 or 60

Stroke in

in. (mm) Description

3/4 (20) Electric Linear

Valve Actuator

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.

Actuator Material:

Cover: ABS-FR plastic. Base: PBTP-FR plastic. Yoke: Diecast aluminum.

Actuator Stroke: 3/4 in. (20 mm).

Close-off Pressure Ratings: See Table 1.

Protection Standard: IP54.

Approvals:

Canadian Standards Association Listed. Underwriter’s Laboratories, Inc. UL94-5V Flame Retardant. Meets CE requirements.

Cable entry: Conduit connector and one knockout on case.

Accessories:

43196000-001 High Temperature Kit (1/2 to 3 in. valves).

Increases temperature range high-end to 428°F (220°C).

For ML6420/ML6425

43191679-111 Single Auxiliary 10K ohm Potentiometer. 43191679-112 Single Auxiliary 220 ohm Potentiometer. 43191680-105 Dual Auxiliary Switch (for 24 Vac use only).

For ML7420/ML7425

43191680-205 Dual Auxiliary Switch (for 24 Vac use only).

ORDERING INFORMATION

When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the TRADELINE® Catalog or price sheets for complete ordering number.

If you have additional questions, need further information, or would like to comment on our products or services, please write or phone:

1. Your local Honeywell Automation and Control Products Sales Office (check white pages of your phone directory).

2. Honeywell Customer Care

1885 Douglas Drive North Minneapolis, Minnesota 55422-4386

3. http://customer.honeywell.com or http://customer.honeywell.ca In Canada—Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Toronto, Ontario M1V 4Z9. International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France, Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.

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ML6420, ML7420 NON-SPRING RETURN ELECTRIC LINEAR VALVE ACTUATORS

CAUTION

5-5/15 (135)

6-5/16 (161)

2-11/16 (67)

12-11/16 (322) MINIMUM CLEARANCE

9-3/16

(233)

9-9/16

(242)

5-9/16

(141)

M17419

1/2 (13) FPT

YOKE DIAMETER 1-3/8 (35)

Table 1. Close-off ratings for ML6420, ML7420 Electric Linear Valve Actuators and Honeywell Valves (psi).

Type 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.

FlangeV5011A ——————2816

V3350/3351/3450/3451 — — — — — — 21 14

V5013B,C; V3360/3361/3460/3461 — — — — — —

NPT V5011F,G

150

134

77 49 28 16

V5011H,J 150 150 150 145 — — — —

V5011N1xxx, V5011N3xxx, V5013N 230 230 163 104 67 37

V5011N2xxx 100 100 100 100

V5013F 150 150 150 126 77 49

Represents maximum pressure difference between the outlet and either of the two inlets.

Do not exceed 100 psi with V5011G valves used in steam applications.

Electrical Shock or Equipment Damage Hazard. Can shock individuals or short equipment circuitry.

Disconnect power supply before installation.

Location

Install the actuator in a location that allows enough clearance for mounting accessories and for servicing.

Fig. 1. Approximate dimensions of ML6420, ML7420

Electric Linear Valve Actuator in in. (mm).

INSTALLATION

When Installing this Product...

1. Read instructions carefully. Failure to follow them could

damage the product or cause a hazardous condition.

2. Check ratings and description given in the specifications to make sure the product is suitable for your application.

3. Installer must be a trained, experienced service technician.

4. After installation is complete, check out product operation as provided in these instructions.

Equipment Damage Hazard. Can damage actuator due to condensation or a valve gland leak.

Install the actuator in a position above horizontal.

Mounting

1. Place the actuator on the valve with the U-bolt around

the valve collar. See Fig. 2.

2. Place the U-bolt against the valve collar and secure the actuator to the valve by turning each U-bolt nut clockwise.

NOTE: To assure even pressure on the collar, first

tighten the nuts finger-tight and then alternate turning each U-bolt nut until both are snug.

3. Push aside the stem button retaining clip and hold. See Fig. 3.

4. Lift valve stem until the head of the valve stem button is inside the large slot of the stem button retaining clip on the actuator.

5. Release the stem button retaining clip to secure the stem button. Check to make certain the stem button is secured by the retaining clip.

6. Remove the cover from the actuator using a Phillips or crosspoint screwdriver. See Fig. 4.

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