Greenheck MP-323 Installation Manual

Wiring Diagram

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Green

Part Number 463545

Multi Products

Installation Instructions

Motor Pack Contents

1. Actuator

2. Actuator Bracket

3. Actuator Arm Assembly

4. Connecting Links

5. Actuator Spring

All necessary hardware included

1. The MP-323 motor pack is designed for installation on Model WD-323 backdraft dampers only. When properly installed, the damper will be vertically mounted to exhaust air.

2. Position the motor bracket into the inside lower left corner of the damper.

3. While holding the bracket snug into the corner and keeping it square to the damper frame, trace the location of the two mounting holes onto the damper frame.

4. Mount the motor pack to the damper frame using hardware provided.

UL Listed Electric Actuators With Spring Return

MP-323 Motor Pack

For Use With WD-323 Dampers

Detail "A"

Adjustment Screws

5. Connect the motor arm to the blade as shown in Detail “A”.

6. With the blades in the fully open position, rotate the motor arm away from the damper until it seats firmly against the rubber stop. Hold the arm in this position while tightening the two adjustment screws on the motor linkage. (Adjustment screws should be placed as far apart as possible to provide greater stability to the linkage.)

7. Release the motor arm to allow the blades to close.

8. If the damper fails to function properly, check for one of the following causes:

A. Motor pack fails to close the damper completely.

• Check for an ‘out of square’ or racked damper.

• Insufficient spring tension. B. Motor pack fails to open the damper completely.

• Check for an ‘out of square’ or racked damper.

• Excessive spring tension.

• Excessive voltage drop. C. Motor pack fails to function.

• Check for correct voltage.

• Check for proper wiring.

Mounting Hardware

Actuator Specifications

MP-323 motor packs are single phase 60 Hz (50 Hz optional) shaded pole stall type impedance protected electric actuators and are supplied in various voltages (see chart below).On dual voltage motor packs, be sure to connect the proper motor leads for the correct voltage and insulate any unused wire.The voltage of each specific model is stamped into the actuator housing or on a label that is affixed to the actuator (see page 2 for typical wiring diagrams).

Motor packs 24V (60 Hz) 440V (60 Hz) 120V (50/60 Hz) 208V (50/60 Hz) 220V (50/60 Hz) 24V (50 Hz) 380V (50 Hz)

Stall Amps .740 .047 .110 .050 .062 .100 .098

Spec ID# 3753 3752 3751 3751 3751 2651-A 2663-C

Typical Wiring Diagrams

Wiring diagrams are shown for motor packs and dampers installed with power ventilator fan equipment with single speed motor. The damper will open when the fan is on and close when the fan is off. For connection to 2-speed fan motors or for other control sequences, consult the factory. The wiring diagrams shown with end switches are for applications where it is desirable to have the damper fully open before fan start-up.

MP-323

Single Phase

Three Phase

575/600 Volt Transformer Model B050WZ13

Chart 1

Transformers

208/220/277/460 Volt Transformer

463545 MP-323 Rev 2 Dec 2009.