Schneider Electric MC-351, 421, 431, MC-4311 Data Sheet
MC-351, 421, 431, MC-4311
Three-Wire, Two Position Actuators
General Instructions
Applications
For two-position operation of dampers or valves in heating, ventilating and air-conditioning systems and similar applications where return to normal position is not required.
These unidirectional actuators (clockwise rotation) require a three-wire control circuit; SPDT snap-acting switch or its equivalent such as a thermostat, pressure switch or relay. A built-in cam operated, snap-acting, adjustable SPDT auxiliary switch is standard. It is factory set to make at mid-stroke. One contact closes at end of stroke; other contact closes at end of next stroke.
MC-xxx
(Standard Actuator)
Features
•24, 120, and 240 Vac models
•Equipped with SPDT auxiliary switch
•Actuator has a rugged die cast aluminum housing with two 1/2” conduit openings
•Hazardous location actuator housing has two 3/4" pipe taped openings for rigid metal conduit connection
•Oil immersed gear train
•Requires a three wire control circuit SPDT snap-acting or equivalent
Options
Available 24, 120, 208, 240 Vac; 50 or 60 Hz. 50 Hz specify MC5-xxx. For hazardous locations, specify MC6-xxx (60 Hz), MC7-xxx (50 Hz). Actuators factory assembled, UL Listed, cUL Listed.
Applicable Literature
•AV-390 Series, Valve Linkage for Gear Train Actuators, General Instructions, F-24376
•Electric/Electronic Products Catalog, F-27382
MC6-3xx, MC6-4xx, MC7-4xx,
(Hazardous Location Actuator)
•Apparatus for Hazardous Locations EN-56-2
F-18451
•AV-29x Series Hazardous Location Valve Linkage for Geartrain Actuators General Instructions
F-27441
Printed in U.S.A. 6/12 |
© Copyright 2012 Schneider Electric All Rights Reserved. |
F-08366-15 |
SPECIFICATIONS
Control Circuit: Three Wire SPDT snap-acting switch or equivalent.
Shaft Rotation: Unidirectional clockwise 180° when power is applied.
Auxiliary Switch: Adjustable SPDT is standard. Factory set to make (or break) at mid stroke.
Running, 5.8A at 120 Vac, 2.9 at 240 Vac
Locked Rotor: 34.8 at 120 Vac, 17.4 at 240 Vac
Non-inductive, 12A at 120 Vac, 6 at 240 Vac.
Environment:
Ambient temperature limits: Shipping and storage -40 to 136 °F (-40 to 58 °C)
Operating -40 to 136 °F (-40 to 58 °C).
Humidity: 5 to 95% RH, non-condensing.
Locations: NEMA 1. Optional NEMA 4 with AM-363 gasket, or hazardous service locations
N.E.C., Class 1, Groups C and D, and Class 2, Groups E, F, and G.
Connections: Coded screw terminals.
Options: Hazardous locations specify MC6-351, 421, or 431 (60 hz), MC7-4311 (50 hz).
Agency Listing: UL File #E9429 standard models.
UL File #29291 Hazardous location models. Temperature code T6 for hazardous housing.
Table-1 Model Chart.
Part No. |
Part No. |
|
|
Input |
|
No Load |
|
Nominal Damperc Area |
||
|
|
|
Rated Torque |
Sq. Ft. (m2) |
||||||
Standard |
Hazardous |
|
|
|
|
|
Timing |
|||
Service |
Locationa b |
Volts |
Hz |
|
Watts |
VA Rating |
(Sec./180×) |
Lb.-in. (N-m) |
Parallel |
Opposed |
|
|
|||||||||
|
|
|
|
|
|
|
|
|
Blade |
Blade |
MC-351 |
MC6-351 |
24 |
60 |
|
28 |
53 |
70 |
220 (25) |
122 (11) |
157 (15) |
MC-421 |
MC6-421 |
120 |
60 |
|
50 |
96 |
20 |
175 (20) |
97 (9) |
125 (12) |
MC-431 |
MC6-431 |
120 |
60 |
|
50 |
96 |
30 |
220 (25) |
122 (11) |
157 (25) |
MC-4311 |
— |
240 |
60 |
|
50 |
96 |
30 |
220 (25) |
122 (11) |
157 (15) |
MC5-4311d |
MC7-4311d |
240 |
50 |
|
50 |
96 |
36 |
220 (25) |
122 (11) |
157 (15) |
aClass 1, Groups C & D, and Class 2, Groups E, F, and G hazardous locations; refer to EN-56-2, F-18451. Hazardous location valve actuators can also be used for hazardous location damper applications.
bModels for hazardous locations are only available as factory-built enclosure/actuator assemblies. See standard actuator part number wiring diagrams for wiring terminations.
cDamper ratings are nominal and based on standard (not low leakage) dampers at 1" (25.4 mm) W.C. static pressure and 2000 FPM (10 ml/S) velocity.
dNot cUL approved.
ACCESSORIES
Damper Linkage Accessories (See Figure-1)
AM-111 |
Crank arm for 5/16" diameter damper shaft |
AM-112 |
Crank arm for 3/8" diameter damper shaft |
AM-113 |
Crank arm for actuator or 1/2" diameter damper shaft |
AM-115 |
Crank arm for 7/16" diameter damper shaft |
AM-116 |
Splined crank arm for actuator |
AM-122 |
Linkage connector straight type |
AM-123 |
Damper clip |
AM-125 |
5/16" diameter x 20" damper rod |
AM-125-048 |
5/16" diameter x 48" damper rod |
AM-132 |
Ball joint connector |
AM-161 |
Damper linkage kit |
AM-161-1 |
Damper linkage kit |
AM-301 |
90 degree mounting bracket |
Valve Linkage Accessories (See Figure-4)
AV-330 |
Valve linkage for 2-1/2" & 3" VB-9323 |
AV-352 |
Valve linkage for 2-1/2" to 6" VB-9213 or VB-9313 valve bodies and 4" to 6" for VB-9323 |
AV-393 |
Valve linkage for 1/2" to 2" VB-7xxx and 1/2" to 1-1/4" VB-92x3 or VB-93x3 |
AV-394 |
Valve linkage for 1-1/2" & 2" VB-92x3 or VB-93x3 (discontinued) |
AV-396 |
Valve linkage for 2-1/2" to 4" VB-9213 or VB-9313 |
Valve Linkage Hazardous Location Accessories (See Figure-5)
AV-293 |
Valve linkage for 1/2" to 2" VB-7xxx series for hazardous locations |
AV-296 |
Valve linkage for 2-1/2" and 3" VB-9xxx (bronze) series for hazardous location |
2 |
© Copyright 2012 Schneider Electric All Rights Reserved. |
F-08366-15 |
Miscellaneous Actuator Accessories
Standard models only.
AM-321 |
Two step switch kit |
AM-341 |
Four step switch kit |
AM-363 |
NEMA 4 rated gasket kit |
Figure-1 Damper Linkage Accessories.
TYPICAL APPLICATION (Wiring Diagram)
Make all electrical connections in compliance with the job wiring diagram and the national and local electric codes. Typical connections are shown in (Figure-2).
Figure-2 External Wiring for Heating Application.
PRE-INSTALLATION
The MC actuators are shipped without mounting hardware or linkage. In damper applications, crank arms (AM-113), connectors (AM-122 or AM-132), link rods (AM-125) and mounting brackets (AM-301) will be required. In valve applications, a valve body and AV type linkage will be required.
Before installing the actuator, check for bent or broken parts or oil leaks. Actuators may be connected to power supply to check operation prior to installation.
F-08366-15 |
© Copyright 2012 Schneider Electric All Rights Reserved. |
3 |
INSTALLATION
Requirements
Procedure
Damper
Installation
Valve Installation
Preferred mounting for the actuator is in the upright position, but other positions are acceptable. Adjustable speed units should never be mounted upside down or with the output shaft pointing upward. Allow six inches clearance above the actuator wiring compartment. If an AM type mounting bracket is not used, the base of the actuator may be used as a template for marking mounting holes.
Actuator may be used in damper and valve control applications. Figure-3 illustrates linkage operating an arm through a 90° arc. To fasten damper linkage proceed as follows.
Figure-3 180° Actuator Rotation Driving a Damper
Rotation of 90°.
1.Fasten linkage connector at end of damper crank arm.
2.Fasten linkage connector at punch mark on actuator crank arm (about .707 of the radius).
3.Move damper to normal position and clamp connecting link to connectors.
4.Check adjustment for proper operation by running actuator and driven shaft between limits of travel.
Caution: If crank arm does not provide proper travel, reset connecting link in linkage connector. Never attempt to turn the actuator shaft with a wrench or a crank. This may damage the gears.
Install all valves with pressure under seat. Refer to flow arrow on body or piping information on valve body tag. Three way mixing valves should be installed with two inlets and one outlet. Three way diverting valves should be installed with one inlet and two outlets.
To assemble an actuator to a valve, refer to detailed instructions on AV-3xx General Instruction Sheet, F-19068 or AV-29x Series Hazardous Location Valve Linkage for Geartrain Actuators General Instructions, F-27441.
4 |
© Copyright 2012 Schneider Electric All Rights Reserved. |
F-08366-15 |
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