Greenheck MP-310 Installation Instructions And Use

®
DAMPERS AND LOUVERS
Motor Pack Contents
1. Actuator
2. Actuator Bracket
3. Actuator Arm Assembly
4. Connecting Links
5. Actuator Spring
All hardware included
1. MP-310 motor packs
are designed for use
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. 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 the Actuator Arm
Assembly. Fasteners should be placed as far apart as
possible. This provides greater stability to the linkage.
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.
5. Actuators are supplied with junction boxes and covers.
When wiring, make sure the voltage is correct. 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)
Stall Amps .740
Spec ID# 3753
5
2
Single Panel
440V (60 Hz) 120V (50/60 Hz) 208V (50/60 Hz) 220V (50/60 Hz)
.047 .110
3752 3751
Field Installation Instructions for
Multi Products
MP-310 Motor Pack
UL Listed Electric Actuators With Spring Return
For Use With WD-300 Series Dampers
4
1
3
6. If the damper fails to open properly, check for one of
the following causes:
A. Motor pack fails to open the damper completely.
• Check for an 'out of square' or racked damper.
• Spring tension too great.
• Excessive voltage drop.
B. Motor pack fails to function.
• Check for correct voltage.
• Check for proper wiring.
Motor Pack Quantity
One or two motor packs may be required depending on
damper size. Single panel dampers have one column of
blades and one actuator is installed as shown in the
Single panel view above. Double panel dampers have
two columns of blades and on actuator is installed as
shown in the Multiple panel view above. Triple panel
dampers have three columns of blades and two
actuators are installed as shown in the Multiple panel
view above.
Actuator Specifications
MP-310 motor packs use single phase 60hz (50hz
optional) shaded pole stall type impedance protected
electric actuators and are supplied in various
voltages(see chart below). For 277, 575 or 600 volt
operation a transformer and 115 volt motor pack is
required.
.050
3751
Part No. 463547
1
5
2
Multiple Panel
24V (50 Hz)
.062 .100
3751 2651-A
1
3
380V (50 Hz)
.098
2663-C