Greenheck AV-30 User Manual

MC-351, MC-421, MC-431, MC-4311, MC5-4311

MC-351,M

Two-Position, Non-Spring Return Actuators

This actuator provides 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.

Features:

• Two-position actuators controlled by SPDT controller.

• Non-spring return.

• 24, 120, and 240 Vac models available.

• SPDT auxiliary switch is standard.

• Rugged die cast aluminum housings.

• Oil immersed motor and gear train.

Model Chart

Model No.

MC-351 24 60 28 53 70 220 (25)

MC-421 120 60 50 96 20 175 (19)

MC-431 120 60 50 96 30 220 (25)

MC-4311 240 60 50 96 30 220 (25)

MC5-4311

No CSA on MC5-4311.

Volts Hz Watts VA Rating

240 50 50 96 36 220 (25)

Input

No Load Timing (sec/180q)

Rated Torque lb-in.

421, MC-431, MC-4311, MC5-4311

(N-m)

Specifications

Control Circuit Three wire, SPDT snap-acting switch provided by a thermostat, pressure switch, or relay.

Shaft Rotation Unidirectional clockwise 180q when power is applied.

Auxiliary Switch Adjustable SPDT is standard. Factory set to make (or break) at mid-stroke.

Nominal Damper Ares Actuator sizing should be done in accordance with damper manufa

Environment

Ambient temperature limits

Humidity 5 to 95% RH, non-condensing.

Locations NEMA Type 1. NEMA 4 with AM-363.

Connections Coded screw terminals.

Case Die cast aluminum with two 1/2 in. conduit knock-outs on each side.

Mounting Allow 6 in. (152 mm) clearance above the actuator wiring compartment.

Dampers Any position.

Valves In

Dimensions 7 H x 5-3/8 W x 6-5/16 D in. (178 x 137 x 160 mm).

Options Hazardous locations: specify MC6-431, MC6-4311 (60 Hz), MC7-4311 (50 Hz).

General Instructions Refer to F-08366.

Shipping and storage: -40 to 136qF (-40 to 58qC). Operating: -40 to 136qF (-40 to 58qC).

any upright position with actuator above the center line of the valve body.

cturer’s specifications.

Adjustable Auxiliary Switch SPDT Rating Amps.

Type 120 V 240 V

Running 5.8 2.9

Locked Rotor 34.8 17.4

Non-Inductive 12.0 6.0

MC-351, MC-421, MC-431, MC-4311, MC5-4311

Accessories

Model No. Description Damper linkage accessories

AM-111 Crank arm for 5/16 in. (7.9 mm) diameter damper shaft. AM-112 Crank arm for 3/8 in. (9.5 mm) diameter damper shaft. AM-113 Crank arm for actuator or 1/2 in. (12.7 mm) diameter damper shaft. AM-115 Crank arm for 7/16 in. (11.1 mm) diameter damper shaft. AM-116 Splined crank arm for actuator. AM-122 Linkage connector straight type. AM-123 Damper clip. AM-125 5/16 in. (7.9 mm) diameter x 20 in. (508 mm) damper rod. AM-125-04 AM-132 Ball joint connector. AM-161 Damper linkage kit. AM-161-1 Damper linkage kit. AM-301 90 degree mounting bracket.

Miscellaneous actuator accessories

AM-321 Two step switch kit. AM-341 Four step switch kit. AM-363 NEMA 4 gasket kit.

Valve linkage accessories

AV-30 & AV-300 Valve linkage for 2-1/2 in. & 3 in. VB-9323. AV-352 Valve linkage for 2-1/2 in. to 6 in. VB-9213, 2-1/2 in. through 6 in. VB-9313, 4 in. through 6 in. VB-9323 AV-393 Valve linkage for 1/2 to 2 in. VB-7xxx and 1/2 in. to 1-1/4 in. discontinued VB-92x3, or VB-93x3. AV-394 Valve linkage for 1-1/2 in. and 2 in. VB-92X3, or VB-93x3 AV-396 Valve linkage for 2-1/2 in. to 4 in. VB-9213, and VB-9313.

8 5/16 in. (7.9 mm) diameter x 48 in. (1,219.2 mm) damper rod.

Typical Applications

SPDT

Snap-Acting

Control

AC Supply

MC5-4311

MC-351 MC-421 MC-431

MC-4311

1 One SPDT switch can control only one actuator.

2 Damper Actuator: R-Rotates 180 to 360 (0 ).

Valve Actuator: R-Raises Stem.

3 Damper Actuator: B-Rotates 0 to 180 .

Valve Actuator: B-Lowers Stem.

4 Internal jumper.

5 These terminal are marked L1 & L2 on line voltage

actuators.

6 Wiring: Make all electrical connections in compliance

with the job wiring diagram & local electric codes.

Figure 1 Typical Wiring.