Greenheck MP-310 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-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
UL listed electric actuators with spring return
Installation Instructions
DETAIL "A"
6
4
1
2
5
Single Panel
Document Number 463547
for use with WD-300 series dampers
6
4
3
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
MP-310 Motor Pack
6
4
2
5
Multiple Panel
1
3