Greenheck MP-310 User manual

®
Document 463547
MP-310 Motor Pack
Electric actuators with spring return for use
with WD-300 series dampers
Installation, Operation and Maintenance Manual
Please read and save these instructions for future reference. Read carefully before attempting to assemble, install,
operate or maintain the product described. Protect yourself and others by observing all safety information. Failure
to comply with these instructions will result in voiding of the product warranty and may result in personal injury
and/or property damage.
MP-310 Motor Pack 1
Motor Pack Contents
1. Actuator
2. Actuator Bracket
3. Actuator Arm Assembly
4. Connecting Links
5. Actuator Spring
All necessary hardware included
1
4
3
5
2
41
5
23
6
6
6
DETAIL "A"
4
Single Panel Multiple Panel
Electrical Guidelines
All wiring shall be done in accordance with the
National Electrical Code ANSI/NFPA-70 latest edition,
any local codes that may apply, and wiring diagrams
developed in compliance with the job or project
design and specifications.
Attention
Electrical input may be needed for this equipment.
This work should be performed by a qualified
electrician. Verify power before wiring actuator.
Greenheck is not responsible for any damage to, or
failure of the unit caused by incorrect field wiring. To
avoid causing death or serious bodily harm to building
occupants, follow all instructions carefully. Dampers
must close completely to preserve the integrity of the
fire smoke separation.

MP-310 Motor Pack2
Installation Instructions
1. The MP-310 motor pack is designed for installation on model WD-300 series backdraft dampers only.
2. For single panel damper, insert tab of motor bracket into the slot on the side of the frame. For dampers with center
bars, the tab of the motor bracket should be inserted into the slot on the bottom of the center bearing rail.
Position bracket over the two holes on the bottom of the frame and secure with the hardware provided.
3. Position the connecting link(s) on the second blade pivot from the bottom of the damper. Slip the connecting link
over the bushing and, with a needle nose pliers, bend the tab over to the position shown in Detail ‘A’. This will
hold the connecting link in place on the pivot.
4. Connect the actuator arm assembly to the connecting link using the provided hardware.
5. To adjust the actuator linkage assembly, pull back on the actuator arm assembly until a slight amount of tension
has been applied to the actuator spring. Tighten the fasteners between the connecting link and actuator arm
assembly. Fasteners should be placed as far apart as possible. This will provide greater stability to the linkage.
Operate the damper manually. Verify that the linkage fasteners do not interfere with any components of the
assembly and that the damper blades close completely when released. To increase spring tension raise the
spring up on the bracket. To decrease the spring tension lower the spring.
6. Actuators are supplied with junction box and cover. When wiring, make sure the supply voltage agrees with the
actuator voltage. On dual voltages 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 indicated on a label that is affixed
to the actuator (see typical wiring diagrams).
7. If the damper fails to open properly, check for one of the following causes:
• Check for an ‘out of square’ or racked damper
• Check for mounting screws interfering with the blade and linkage rotation
• Spring tension too great
• Excessive voltage drop
• Excessive negative pressure in the building
If actuator fails to function:
• Check for correct voltage
• Check for proper wiring
Motor Pack Quantity
More than one motor pack may be required depending on damper size:
• On single panel dampers, the actuator is installed as shown on page 1 in the single panel view
• On double or triple panel dampers, the actuator(s) is installed as shown on page 1 in the multiple panel view.
Actuator Specifications
MP-310 motor pack uses a single phase shaded pole stall type impedance protected electric actuators and are
supplied in various voltages (see chart). For 277, 380, 575, or 600 volt operation a transformer and 120V motor pack
is required.
Motor Packs Stall Amps Spec ID#
24V (50/60 Hz) .66 G24
110 - 120V
(50/60 Hz) .15 G110-240
208 - 240V
(50/60 Hz) .07 G110-240
460V (60 Hz) .041 G460

MP-310 Motor Pack 3
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 two-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.
Single Phase
Three Phase
Actuator Wiring Diagrams
Optional transformer for
277, 380, 575 or 600 volts
(120V actuator required)
Optional transformer for
277, 380, 575 or 600 volts
(120V actuator required)
Blue
24V Single Voltage Actuator 460V Single Voltage Actuator
White
Brown
Brown
110/115/120V Dual Voltage Actuators
Blue
208/220/230/240V Dual Voltage Actuators
Optional transformer for
277, 380, 575 or 600 volts
(120V actuator required)
Optional transformer for
277, 380, 575 or 600 volts
(120V actuator required)
Blue
24V Single Voltage Actuator 460V Single Voltage Actuator
White
Brown
Brown
110/115/120V Dual Voltage Actuators
Blue
208/220/230/240V Dual Voltage Actuators
Optional transformer for
277, 380, 575 or 600 volts
(120V actuator required)
Optional transformer for
277, 380, 575 or 600 volts
(120V actuator required)
Blue
24V Single Voltage Actuator 460V Single Voltage Actuator
White
Brown
Brown
110/115/120V Dual Voltage Actuators
Blue
208/220/230/240V Dual Voltage Actuators
Optional transformer for
277, 380, 575 or 600 volts
(120V actuator required)
Optional transformer for
277, 380, 575 or 600 volts
(120V actuator required)
Blue
24V Single Voltage Actuator 460V Single Voltage Actuator
White
Brown
Brown
110/115/120V Dual Voltage Actuators
Blue
208/220/230/240V Dual Voltage Actuators
Optional transformer for
277, 380, 575 or 600 volts
(120V actuator required)
Optional transformer for
277, 380, 575 or 600 volts
(120V actuator required)
Blue
24V Single Voltage Actuator 460V Single Voltage Actuator
White
Brown
Brown
110/115/120V Dual Voltage Actuators
Blue
208/220/230/240V Dual Voltage Actuators
Optional transformer for
277, 380, 575 or 600 volts
(120V actuator required)
Optional transformer for
277, 380, 575 or 600 volts
(120V actuator required)
Blue
24V Single Voltage Actuator 460V Single Voltage Actuator
White
Brown
Brown
110/115/120V Dual Voltage Actuators
Blue
208/220/230/240V Dual Voltage Actuators
Optional transformer for
277, 380, 575 or 600 volts
(120V actuator required)
Optional transformer for
277, 380, 575 or 600 volts
(120V actuator required)
Blue
24V Single Voltage Actuator
460V Single Voltage Actuator
White
Brown
Brown
110/115/120V Dual Voltage Actuators
Blue
208/220/230/240V Dual Voltage Actuators
Optional transformer for
277, 380, 575 or 600 volts
(120V actuator required)
Optional transformer for
277, 380, 575 or 600 volts
(120V actuator required)
Blue
24V Single Voltage Actuator
460V Single Voltage Actuator
White
Brown
Brown
110/115/120V Dual Voltage Actuators
Blue
208/220/230/240V Dual Voltage Actuators

As a result of our commitment to continuous improvement, Greenheck reserves the right to change specifications
without notice.
Product warranties can be found online at Greenheck.com, either on the specific product page or in the literature
section of the website at Greenheck.com/Resources/Library/Literature.
®
Phone: [phone] • Fax: [phone] • Parts: 800.355.5354 • E-mail: [email protected] • Website: www.greenheck.com
Our Commitment
463547 • MP-310 Motor Pack, Rev. 8, September 2020 Copyright 2020 © Greenheck Fan Corporation4
Transformers
Optional transformer for
277, 380, 575 or 600 volts
(120V actuator required)
Optional transformer for
277, 380, 575 or 600 volts
(120V actuator required)
Blue
24V Single Voltage Actuator 460V Single Voltage Actuator
White
Brown
Brown
110/115/120V Dual Voltage Actuators
Blue
208/220/230/240V Dual Voltage Actuators
575/600 Volt Transformer Model B050WZ13
Optional transformer for
277, 380, 575 or 600 volts
(120V actuator required)
Optional transformer for
277, 380, 575 or 600 volts
(120V actuator required)
Blue
24V Single Voltage Actuator 460V Single Voltage Actuator
White
Brown
Brown
110/115/120V Dual Voltage Actuators
Blue
208/220/230/240V Dual Voltage Actuators
208/220/277/460 Volt Transformer