Greenheck MP-310 User manual

®
Document Number 463547
MP-310 Motor Pack
UL listed electric actuators with spring return
for use with WD-300 series dampers
Installation Instructions
Motor Pack Contents
1. Actuator
2. Actuator Bracket
3. Actuator Arm Assembly
4. Connecting Links
5. Actuator Spring
All necessary hardware included
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 spring tension lower
the spring.
Note: It is important to avoid too much spring
tension; use just enough tension to help close the
damper. Too much tension could impair opening of
the damper.
6. Actuators are supplied with junction boxes and
covers. When wiring, make sure the supply voltage
agrees with the actuator voltage. 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
indicated on a label that is affixed to the actuator
(see page 2 and 3 for typical wiring diagrams).
7. If the damper fails to operate properly, check for
one of the following causes:
• Check for an ‘out of square’ or racked damper
• Check for mounting screws interfering with the
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 actuator
bracket into the slot on the side of the frame. For
dampers with center bars, the tab of the actuator
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 #10 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
1
4
3
5
2
41
5
23
6
6
6
DETAIL "A"
4
Single Panel Multiple Panel

blade and linkage rotation
• Spring tension too great
• Excessive voltage drop
• Excessive negative pressure in the building
If the 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 panel dampers, the actuator
is installed as shown on page 1 in the multiple panel
view. On triple panel dampers, two actuators are
installed as shown in the multiple panel view.
Actuator Specifications
MP-310 motor pack uses a single phase shaded pole
stall type impedace protected electric actuators and
are supplied in various voltages (see chart). For 277,
380, 575 or 600 volt operation, a transformer and a
120V motor pack is required.
Motor Packs 24V (50/60 Hz) 110 thru 120V
(50/60Hz)
208 thru 240V
(50/60 Hz) 460V (60Hz)
Stall Amps .66 .15 .07 .041
Spec ID# G24 G110-240 G-110-240 G460
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 had the damper fully open before fan start-up.
Single Phase
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
Three Phase
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
Chart 1
* Actuator wiring diagrams on page 3.
2

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
Transformers
575/600 Volt Transformer Model B050WZ13 208/220/277/460 Volt Transformer
463547 • MP-310, Rev. 5, August 2012 Copyright 2012 © Greenheck Fan Corporation
As a result of our commitment to continuous improvement, Greenheck reserves the right to change specifications
without notice.
Specific Greenheck product warrantees can be located on greenheck.com within the product area tabs and listed
in the Library under Warrantees.
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